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Sample records for staining antigens immunohistochemically

  1. Lectin binding patterns and immunohistochemical antigen detection ...

    African Journals Online (AJOL)

    Ibrahim Eldaghayes

    2018-02-09

    Feb 9, 2018 ... examined by histological, lectin-histochemical, immunohistochemical and cultural techniques. B. abortus antigens were immunohistochemically detected in fetal lungs and placenta. An increase in the labeling with UEA-1, DBA,. PNA, RCA-1 and SBA was found in the lungs and an increase in the labeling ...

  2. Comparison of immunohistochemical and modified Giemsa stains ...

    African Journals Online (AJOL)

    In 2 cases immunostain could not demonstrate the bacteria but they were identified with modified Giemsa stain while in 5 cases the bacteria were identified by immunostain but not with modified Giemsa stain. The sensitivity of modified Giemsa stain was 85% (CI 66.5-98.8) while the specificity was 89% (CI 60.4 – 97.8).

  3. A generally applicable sequential alkaline phosphatase immunohistochemical double staining

    NARCIS (Netherlands)

    van der Loos, Chris M.; Teeling, Peter

    2008-01-01

    A universal type of sequential double alkaline phosphatase immunohistochemical staining is described that can be used for formalin-fixed, paraffin-embedded and cryostat tissue sections from human and mouse origin. It consists of two alkaline phosphatase detection systems including enzymatic

  4. Evaluation of Decalcification Techniques for Rat Femurs Using HE and Immunohistochemical Staining

    Directory of Open Access Journals (Sweden)

    Haixia Liu

    2017-01-01

    Full Text Available Aim. In routine histopathology, decalcification is an essential step for mineralized tissues. The purpose of this study is to evaluate the effects of different decalcification solutions on the morphological and antigenicity preservation in Sprague Dawley (SD rat femurs. Materials and Methods. Four different decalcification solutions were employed to remove the mineral substances from rat femurs, including 10% neutral buffered EDTA, 3% nitric acid, 5% nitric acid, and 8% hydrochloric acid/formic acid. Shaking and low temperature were used to process the samples. The stainings of hematoxylin-eosin (HE and immunohistochemical (IHC were employed to evaluate the bone morphology and antigenicity. Key Findings. Different decalcification solutions may affect the quality of morphology and the staining of paraffin-embedded sections in pathological examinations. Among four decalcifying solutions, 3% nitric acid is the best decalcifying agent for HE staining. 10% neutral buffered EDTA and 5% nitric acid are the preferred decalcifying agents for IHC staining. Significance. The current study investigated the effects of different decalcifying agents on the preservation of the bone structure and antigenicity, which will help to develop suitable protocols for the analyses of the bony tissue.

  5. Quantitative comparison of immunohistochemical staining measured by digital image analysis versus pathologist visual scoring

    Directory of Open Access Journals (Sweden)

    Rizzardi Anthony E

    2012-06-01

    Full Text Available Abstract Immunohistochemical (IHC assays performed on formalin-fixed paraffin-embedded (FFPE tissue sections traditionally have been semi-quantified by pathologist visual scoring of staining. IHC is useful for validating biomarkers discovered through genomics methods as large clinical repositories of FFPE specimens support the construction of tissue microarrays (TMAs for high throughput studies. Due to the ubiquitous availability of IHC techniques in clinical laboratories, validated IHC biomarkers may be translated readily into clinical use. However, the method of pathologist semi-quantification is costly, inherently subjective, and produces ordinal rather than continuous variable data. Computer-aided analysis of digitized whole slide images may overcome these limitations. Using TMAs representing 215 ovarian serous carcinoma specimens stained for S100A1, we assessed the degree to which data obtained using computer-aided methods correlated with data obtained by pathologist visual scoring. To evaluate computer-aided image classification, IHC staining within pathologist annotated and software-classified areas of carcinoma were compared for each case. Two metrics for IHC staining were used: the percentage of carcinoma with S100A1 staining (%Pos, and the product of the staining intensity (optical density [OD] of staining multiplied by the percentage of carcinoma with S100A1 staining (OD*%Pos. A comparison of the IHC staining data obtained from manual annotations and software-derived annotations showed strong agreement, indicating that software efficiently classifies carcinomatous areas within IHC slide images. Comparisons of IHC intensity data derived using pixel analysis software versus pathologist visual scoring demonstrated high Spearman correlations of 0.88 for %Pos (p  Virtual slides The virtual slide(s for this article can be found here: http://www.diagnosticpathology.diagnomx.eu/vs/1649068103671302

  6. Immunohistochemical staining of Langerhans cells and macrophages in oral lichen planus.

    Science.gov (United States)

    Regezi, J A; Stewart, J C; Lloyd, R V; Headington, J T

    1985-10-01

    Twenty patients with clinically and microscopically confirmed lichen planus were studied immunohistochemically. Monoclonal antibody to HLA-DR antigens and polyclonal antisera to S-100 protein and muramidase were applied to paraffin-embedded sections for the purpose of elaborating on the pathogenesis of this disease. Trypsin incubation of sections was also done in order to determine its effect on immunostaining. Langerhans cells were identified with anti-S-100 and anti-HLA-DR, and macrophages were identified with antimuramidase and anti-HLA-DR. Keratinocytes also expressed HLA-DR membrane activity in lichen planus tissue. Trypsinization significantly improved the expression of S-100 protein and muramidase antigens. It was concluded that Langerhans cells, macrophages, and keratinocytes play important roles in antigen processing and/or phagocytosis during the natural history of this disease.

  7. Detection and Cellular Localization of Phospho-STAT2 in the Central Nervous System by Immunohistochemical Staining

    DEFF Research Database (Denmark)

    Khorooshi, Reza; Owens, Trevor

    2013-01-01

    Phosphorylation of signal transducers and activators of transcription (STATs) indicates their involvement in active signaling. Here we describe immunohistochemical staining procedures for detection and identification of the cellular localization of phospho-STAT2 in the central nervous system (CNS...

  8. Heterogeneity in Li-Fraumeni families: p53 mutation analysis and immunohistochemical staining.

    OpenAIRE

    MacGeoch, C; Turner, G; Bobrow, L G; Barnes, D M; Bishop, D T; Spurr, N K

    1995-01-01

    We have screened two families for constitutional TP53 mutations, one family with Li-Fraumeni syndrome and the other with features of this syndrome. We report a germline mutation in exon 7 of the TP53 gene in the family with "Li-Fraumeni-like" syndrome. The mutation occurred at codon 245 and causes a Gly-Ser amino acid change. It was inherited by both affected and unaffected subjects. Malignant tumours from all members of this family showed strong positive nuclear immunohistochemical staining ...

  9. Quantitative comparison of immunohistochemical staining measured by digital image analysis versus pathologist visual scoring

    Science.gov (United States)

    2012-01-01

    Abstract Immunohistochemical (IHC) assays performed on formalin-fixed paraffin-embedded (FFPE) tissue sections traditionally have been semi-quantified by pathologist visual scoring of staining. IHC is useful for validating biomarkers discovered through genomics methods as large clinical repositories of FFPE specimens support the construction of tissue microarrays (TMAs) for high throughput studies. Due to the ubiquitous availability of IHC techniques in clinical laboratories, validated IHC biomarkers may be translated readily into clinical use. However, the method of pathologist semi-quantification is costly, inherently subjective, and produces ordinal rather than continuous variable data. Computer-aided analysis of digitized whole slide images may overcome these limitations. Using TMAs representing 215 ovarian serous carcinoma specimens stained for S100A1, we assessed the degree to which data obtained using computer-aided methods correlated with data obtained by pathologist visual scoring. To evaluate computer-aided image classification, IHC staining within pathologist annotated and software-classified areas of carcinoma were compared for each case. Two metrics for IHC staining were used: the percentage of carcinoma with S100A1 staining (%Pos), and the product of the staining intensity (optical density [OD] of staining) multiplied by the percentage of carcinoma with S100A1 staining (OD*%Pos). A comparison of the IHC staining data obtained from manual annotations and software-derived annotations showed strong agreement, indicating that software efficiently classifies carcinomatous areas within IHC slide images. Comparisons of IHC intensity data derived using pixel analysis software versus pathologist visual scoring demonstrated high Spearman correlations of 0.88 for %Pos (p < 0.0001) and 0.90 for OD*%Pos (p < 0.0001). This study demonstrated that computer-aided methods to classify image areas of interest (e.g., carcinomatous areas of tissue specimens) and

  10. Heterogeneity in Li-Fraumeni families: p53 mutation analysis and immunohistochemical staining.

    Science.gov (United States)

    MacGeoch, C; Turner, G; Bobrow, L G; Barnes, D M; Bishop, D T; Spurr, N K

    1995-03-01

    We have screened two families for constitutional TP53 mutations, one family with Li-Fraumeni syndrome and the other with features of this syndrome. We report a germline mutation in exon 7 of the TP53 gene in the family with "Li-Fraumeni-like" syndrome. The mutation occurred at codon 245 and causes a Gly-Ser amino acid change. It was inherited by both affected and unaffected subjects. Malignant tumours from all members of this family showed strong positive nuclear immunohistochemical staining with antibodies CM-1 and DO1, directed against TP53. In contrast, no constitutional TP53 mutations were found in a "classic" Li-Fraumeni family. In this family positive staining was seen in both malignant and normal tissues. These results support previous findings that variants of the Li-Fraumeni syndrome exist since not all LFS families carry TP53 germline mutations. Secondly, immunohistochemical positivity is not synonymous with an underlying mutation and is therefore inadequate as an exclusive diagnostic marker.

  11. Automatic Cell Segmentation Using a Shape-Classification Model in Immunohistochemically Stained Cytological Images

    Science.gov (United States)

    Shah, Shishir

    This paper presents a segmentation method for detecting cells in immunohistochemically stained cytological images. A two-phase approach to segmentation is used where an unsupervised clustering approach coupled with cluster merging based on a fitness function is used as the first phase to obtain a first approximation of the cell locations. A joint segmentation-classification approach incorporating ellipse as a shape model is used as the second phase to detect the final cell contour. The segmentation model estimates a multivariate density function of low-level image features from training samples and uses it as a measure of how likely each image pixel is to be a cell. This estimate is constrained by the zero level set, which is obtained as a solution to an implicit representation of an ellipse. Results of segmentation are presented and compared to ground truth measurements.

  12. Segmentation of HER2 protein overexpression in immunohistochemically stained breast cancer images using Support Vector Machines

    Science.gov (United States)

    Pezoa, Raquel; Salinas, Luis; Torres, Claudio; Härtel, Steffen; Maureira-Fredes, Cristián; Arce, Paola

    2016-10-01

    Breast cancer is one of the most common cancers in women worldwide. Patient therapy is widely supported by analysis of immunohistochemically (IHC) stained tissue sections. In particular, the analysis of HER2 overexpression by immunohistochemistry helps to determine when patients are suitable to HER2-targeted treatment. Computational HER2 overexpression analysis is still an open problem and a challenging task principally because of the variability of immunohistochemistry tissue samples and the subjectivity of the specialists to assess the samples. In addition, the immunohistochemistry process can produce diverse artifacts that difficult the HER2 overexpression assessment. In this paper we study the segmentation of HER2 overexpression in IHC stained breast cancer tissue images using a support vector machine (SVM) classifier. We asses the SVM performance using diverse color and texture pixel-level features including the RGB, CMYK, HSV, CIE L*a*b* color spaces, color deconvolution filter and Haralick features. We measure classification performance for three datasets containing a total of 153 IHC images that were previously labeled by a pathologist.

  13. A list of image files of planarians analyzed by in situ hybridication and immunohistochemical staining - Plabrain DB | LSDB Archive [Life Science Database Archive metadata

    Lifescience Database Archive (English)

    Full Text Available List Contact us Plabrain DB A list of image files of planarians analyzed by in situ hybridication and immuno...histochemical staining Data detail Data name A list of image files of planarians analyzed by in situ hybridication and immuno...tu hybridication and also protein distribution by immunohistochemical staining in intact planarians or plana...planarians analyzed by In situ hybridication and immunohistochemical staining . D..._image#en Data acquisition method Whole-mount in situ hybridication, immunohistoc

  14. Matrix metalloproteinase-1 expression in breast cancer and cancer-adjacent tissues by immunohistochemical staining

    Science.gov (United States)

    XUAN, JIAJIA; ZHANG, YUNFENG; ZHANG, XIUJUN; HU, FEN

    2015-01-01

    Although matrix metalloproteinase-1 (MMP-1) has been considered a factor of crucial importance for breast cancer cells invasion and metastasis, the expression of MMP-1 in different breast cancer and cancer-adjacent tissues have not been fully examined. In the present study, immunohistochemical staining was used to detect the MMP-1 expression in non-specific invasive ductal carcinoma of the breast, cancer-adjacent normal breast tissue, lymph node metastatic non-specific invasive ductal carcinoma of the breast and normal lymph node tissue. The results showed that MMP-1 expression is different in the above tissues. MMP-1 had a positive expression in normal lymph node tissue and lymph node metastatic non-specific invasive ductal carcinoma. The MMP-1 negative expression rate was only 6.1% in non-specific invasive ductal carcinoma of the breast and 2.9% in cancer-adjacent normal breast tissue respectively. MMP-1 expression is higher in non-specific invasive ductal carcinoma and lymph node metastatic non-specific invasive ductal carcinoma compared to cancer-adjacent normal breast tissue and normal lymph node tissue. In conclusion, higher expression of MMP-1 in breast cancer may play a crucial role in promoting breast cancer metastasis. PMID:26137243

  15. Immunohistochemical antigenic expression and in vivo tumor uptake of monoclonal antibodies with specificity for tumors of the gastrointestinal tract

    International Nuclear Information System (INIS)

    Douillard, J.Y.; Lehur, P.A.; Aillet, G.; Kremer, M.; Bianco-Arco, A.; Peltier, P.; Chatal, J.F.

    1986-01-01

    Two monoclonal antibodies with specificity for carcinoembryonic antigen and Ca 19-9 gastrointestinal tract tumor associated antigens were infused after iodination with 125 I and 131 I, respectively, in six patients 3 days and in one patient 4 days before radical surgery for colon or rectal carcinoma. Biopsy specimens from tumor, normal colon, fat, muscle, and skin along with a blood sample were excised at surgery and counting was performed for gamma emission. Fragments were then studied by two independent pathologists for immunohistochemical expression of corresponding antigens using the avidin-biotin peroxidase complex. A correlation study was thereafter performed between the amount of antibody bound in vivo, expressed as the percentage of injected dose per gram of tissue and the quantitative expression of tumor associated antigens, taking into account both the percentage of cells expressing the antigen and intensity of staining. For this limited number of patients a good correlation was found between amount of targeted antibodies and amount of expressed antigens. For carcinoembryonic antigen, r values were 0.69 and 0.90 for each pathologist (with an r value of interobserver correlation of 0.74); for Ca 19-9, values of 0.78 and 0.84 were obtained for each observer, with an interobserver r value of 0.97. Based on this limited study, it may be assumed that the possibility of imaging a given tumor is in part correlated to intensity of antigenic expression at the tumor site; other parameters, like tumor vascularization and blood flow for instance, are, however, to be considered for accessibility of antibodies to corresponding antigens

  16. Role of calretinin immunohistochemical stain in evaluation of Hirschsprung disease: an institutional experience.

    Science.gov (United States)

    Alexandrescu, Sanda; Rosenberg, Harvey; Tatevian, Nina

    2013-01-01

    The use of calretinin immunostain (IHC) in the evaluation of rectal suction biopsies for Hirschsprung disease (HD) has been reported by Kapur et al. and others. The first goal of this article is to report our institutional experience with the use of calretinin in specimens for evaluation of HD. The second goal is to describe the pattern of expression of calretinin in the junction of ganglionic-to-aganglionic segment of pull through specimens of patients with a previous diagnosis of HD on suction rectal biopsy. Three pathologists at University of Texas at Houston evaluated 28 rectal biopsy specimens from 2010-2011. The patients' age ranged from 15 days to 8 years. Twenty-three cases were suction biopsies, and five were rectal full thickness biopsies. Hematoxylin-eosin (H&E) stain was performed on at least 80 levels for the suction biopsy specimens. Calretinin immunohistochemical stain was performed on levels 40-42 in all cases, with adequate controls. The H&E slides of nine pull through specimens with a diagnosis of HD on a suction rectal biopsy that was evaluated in this study, were evaluated. Calretinin IHC was performed on the slide(s) showing the junction of aganglionic-to-normal rectum, along with adequate controls. The presence of ganglion cells consistently correlated with calretinin-positive thin nerve fibrils in the lamina propria, muscularis mucosae and superficial submucosa. These nerve fibrils were absent in the aganglionic segments of bowel and in the areas without ganglion cells from the junction of normal with diseased rectum. Calretinin was strongly expressed in the submucosal and subserosal nerve trunks in the ganglionic segment. It had faint expression in the thick nerve trunks from the areas without ganglion cells 1.6-2.5 cm proximal to the normal rectum. No calretinin expression was seen in the nerve trunks in the rest of the aganglionic segment. The pattern of expression of calretinin in rectal suction biopsies in HD and normal rectum coincide

  17. Immunohistochemical staining patterns of p53 can serve as a surrogate marker for TP53 mutations in ovarian carcinoma: an immunohistochemical and nucleotide sequencing analysis.

    Science.gov (United States)

    Yemelyanova, Anna; Vang, Russell; Kshirsagar, Malti; Lu, Dan; Marks, Morgan A; Shih, Ie Ming; Kurman, Robert J

    2011-09-01

    Immunohistochemical staining for p53 is used as a surrogate for mutational analysis in the diagnostic workup of carcinomas of multiple sites including ovarian cancers. Strong and diffuse immunoexpression of p53 is generally interpreted as likely indicating a TP53 gene mutation. The immunoprofile that correlates with wild-type TP53, however, is not as clear. In particular, the significance of completely negative immunostaining is controversial. The aim of this study was to clarify the relationship of the immunohistochemical expression of p53 with the mutational status of the TP53 gene in ovarian cancer. A total of 57 ovarian carcinomas (43 high-grade serous ovarian/peritoneal carcinomas, 2 malignant mesodermal mixed tumors (carcinosarcomas), 2 low-grade serous carcinomas, 4 clear cell carcinomas, 1 well-differentiated endometrioid carcinoma, and 5 carcinomas with mixed epithelial differentiation) were analyzed for TP53 mutations by nucleotide sequencing (exons 4-9), and subjected to immunohistochemical analysis of p53 expression. Thirty six tumors contained functional mutations and 13 had wild type TP53. Five tumors were found to harbor known TP53 polymorphism and changes in the intron region were detected in three. Tumors with wild-type TP53 displayed a wide range of immunolabeling patterns, with the most common pattern showing ≤10% of positive cells in 6 cases (46%). Mutant TP53 was associated with 60-100% positive cells in 23 cases (64% of cases). This pattern of staining was also seen in three cases with wild-type TP53. Tumors that were completely negative (0% cells staining) had a mutation of TP53 in 65% of cases and wild-type TP53 in 11%. Combining two immunohistochemical labeling patterns associated with TP53 mutations (0% and 60-100% positive cells), correctly identified a mutation in 94% of cases (Povarian carcinomas. In addition to a strong and diffuse pattern of p53 expression (in greater than 60% of cells), complete absence of p53 immunoexpression is

  18. 9 CFR 147.3 - The stained-antigen, rapid, whole-blood test. 3

    Science.gov (United States)

    2010-01-01

    ...-blood test. 3 147.3 Section 147.3 Animals and Animal Products ANIMAL AND PLANT HEALTH INSPECTION SERVICE... Blood Testing Procedures § 147.3 The stained-antigen, rapid, whole-blood test. 3 3 The procedure... necessary. The test plate should be rocked from side to side a few times to mix the antigen and blood...

  19. Antibody validation and scoring guidelines for ABCG2 immunohistochemical staining in formalin-fixed paraffin-embedded colon cancer tissue

    DEFF Research Database (Denmark)

    Cederbye, Camilla Natasha; Palshof, Jesper Andreas; Hansen, Tine Plato

    2016-01-01

    Overexpression of the ATP-dependent drug efflux pump ABCG2 is a major molecular mechanism of multidrug resistance in cancer and might be a predictive biomarker for drug response. Contradictory results have been reported for immunohistochemical studies of ABCG2 protein expression in colorectal...... cancer (CRC), probably because of the use of different antibodies and scoring approaches. In this study, we systematically studied six commercially available anti-ABCG2 antibodies, using cell lines with up-regulation of ABCG2, and selected one antibody for validation in CRC tissue. Furthermore, we...... established scoring guidelines for ABCG2 expression based on the clinically used guidelines for HER2 immunohistochemistry assessment in gastric cancer. The guidelines provide a semi-quantitative measure of the basolateral membrane staining of ABCG2 and disregard the apical membrane staining...

  20. Ki67/KIT double immunohistochemical staining in cutaneous mast cell tumors from Boxer dogs.

    Science.gov (United States)

    Fonseca-Alves, Carlos Eduardo; Bento, Daniel Diola; Torres-Neto, Rafael; Werner, Juliana; Kitchell, Barbara; Laufer-Amorim, Renée

    2015-10-01

    Cutaneous mast cell tumors (MCTs) are among the most frequent malignant tumors in dogs and Boxer breed dogs have a higher incidence of this disease. Ki67 staining and KIT staining are widely used to predict natural behavior in canine MCT but no previous study has evaluated double staining of these proteins as a prognostic factor. Based on biological behavior predictors in canine MCT, the purpose of this study was to determine the Ki67 proliferative index in KIT positive cells using double stain immunohistochemistry technique. Sixty-nine MCTs from Boxer dogs were selected and a tissue microarray was constructed for the double stained immunohistochemistry. Double positivity (Ki67(+)/KIT(+)) was observed in 20/69 (29%) MCT, with a mean of 9.06 double positive cells per tissue core (range 0.48%-43.97%) and Ki67(-)/KIT(+) animals had a longer survival time than Ki67(+)/KIT(+) animals (p=0.03). Copyright © 2015 Elsevier Ltd. All rights reserved.

  1. Image processing in digital pathology: an opportunity to solve inter-batch variability of immunohistochemical staining.

    Science.gov (United States)

    Van Eycke, Yves-Rémi; Allard, Justine; Salmon, Isabelle; Debeir, Olivier; Decaestecker, Christine

    2017-02-21

    Immunohistochemistry (IHC) is a widely used technique in pathology to evidence protein expression in tissue samples. However, this staining technique is known for presenting inter-batch variations. Whole slide imaging in digital pathology offers a possibility to overcome this problem by means of image normalisation techniques. In the present paper we propose a methodology to objectively evaluate the need of image normalisation and to identify the best way to perform it. This methodology uses tissue microarray (TMA) materials and statistical analyses to evidence the possible variations occurring at colour and intensity levels as well as to evaluate the efficiency of image normalisation methods in correcting them. We applied our methodology to test different methods of image normalisation based on blind colour deconvolution that we adapted for IHC staining. These tests were carried out for different IHC experiments on different tissue types and targeting different proteins with different subcellular localisations. Our methodology enabled us to establish and to validate inter-batch normalization transforms which correct the non-relevant IHC staining variations. The normalised image series were then processed to extract coherent quantitative features characterising the IHC staining patterns.

  2. Image processing in digital pathology: an opportunity to solve inter-batch variability of immunohistochemical staining

    Science.gov (United States)

    Van Eycke, Yves-Rémi; Allard, Justine; Salmon, Isabelle; Debeir, Olivier; Decaestecker, Christine

    2017-01-01

    Immunohistochemistry (IHC) is a widely used technique in pathology to evidence protein expression in tissue samples. However, this staining technique is known for presenting inter-batch variations. Whole slide imaging in digital pathology offers a possibility to overcome this problem by means of image normalisation techniques. In the present paper we propose a methodology to objectively evaluate the need of image normalisation and to identify the best way to perform it. This methodology uses tissue microarray (TMA) materials and statistical analyses to evidence the possible variations occurring at colour and intensity levels as well as to evaluate the efficiency of image normalisation methods in correcting them. We applied our methodology to test different methods of image normalisation based on blind colour deconvolution that we adapted for IHC staining. These tests were carried out for different IHC experiments on different tissue types and targeting different proteins with different subcellular localisations. Our methodology enabled us to establish and to validate inter-batch normalization transforms which correct the non-relevant IHC staining variations. The normalised image series were then processed to extract coherent quantitative features characterising the IHC staining patterns. PMID:28220842

  3. Experimental infection of octopus vulgaris (Cuvier, 1797) with Photobacterium damsela subsp. piscicida. Immunohistochemical tracking of antigen and tissue responses.

    Science.gov (United States)

    Bakopoulos, Vasileios; White, Daniella; Valsamidis, Michail-Aggelos; Vasilaki, Feli

    2017-03-01

    Adult common octopus individuals were intramuscularly infected with Photobacterium damsela subsp. piscicida in order to investigate if this species is sensitive to this common and important fish pathogen. The fate of the bacterial antigens and the tissue responses of Octopus vulgaris were studied employing immunohistochemical techniques. Strong reaction at the site of injection was evident from day 2 post-infection that continued until day 14. Great numbers of hemocytes that were attracted at the site of infection were involved in phagocytosis of bacteria. Very early in the infection, a transition of cells to fibroblasts and an effort to isolate the infection was observed. During the course of the study, very large necrotic cells were seen at the site of infection, whereas during the later stages hemocytes with phagocytosed bacteria were observed in well-defined pockets inside the muscle tissue. None of the internal organs tested for the presence of the bacterium were positive with the exception of the digestive gland where antigen staining was observed which was not associated with hemocyte infiltration. The high doses of bacterial cells used in this experimental infection and the lack of disease signs from Octopus vulgaris suggest that, under normal conditions, octopus is resistant to Photobacterium damsela subsp. piscicida. Copyright © 2017 Elsevier Inc. All rights reserved.

  4. Immunohistochemical diagnosis of Alport's syndrome in paraffin-embedded renal sections: antigen retrieval with autoclave heating.

    Science.gov (United States)

    Naito, Ichiro; Ninomiya, Yoshifumi; Nomura, Shinsuke

    2003-03-01

    Alport's syndrome (AS) is a hereditary renal disease caused by mutations in the genes encoding collagen type IV. Immunohistochemical analysis of the alpha chains of collagen type IV has been found to be useful for the diagnosis of this disease. The monoclonal antibodies (mAbs) generated by us recognize alpha 1(IV) through alpha 6(IV) chains of collagen type IV on fresh-frozen sections but not on paraffin-embedded sections. Antigen retrieval by autoclave heating has been found to restore the epitopes recognized by the mAbs; however the heating conditions had not been well established. In this study, the heating conditions were carefully examined using renal sections obtained from AS and non-AS patients. The heating was performed in an autoclave, at 105 degrees -127 degrees C for 6-8 min. During the heating, the sections were immersed in 0.2 N HCl solution (pH 0.9). Then, the mAbs were applied for 30 min, and the bound mAbs were detected using the LSAB kit. The optimal temperature for the antigen retrieval varied among specimens, and was dependent on the type of basement membrane examined. Thus, it was considered that heating at two or three different temperatures could be helpful for the precise diagnosis of AS. Adopting the antigen retrieval method could extend the possibility of immunohistochemical diagnosis of AS to cases without using fresh-frozen sections.

  5. Protein multiplicity can lead to misconduct in western blotting and misinterpretation of immunohistochemical staining results, creating much conflicting data.

    Science.gov (United States)

    Liu, Xingde; Wang, Yiming; Yang, Wenxiu; Guan, Zhizhong; Yu, Wenfeng; Liao, D Joshua

    2016-11-01

    Western blotting (WB) and immunohistochemical staining (IHC) are common techniques for determining tissue protein expression. Both techniques require a primary antibody specific for the protein in question. WB data is band(s) on a membrane while IHC result is a staining on a tissue section. Most human genes are known to produce multiple protein isoforms; in agreement with that, multiple bands are often found on the WB membrane. However, a common but unspoken practice in WB is to cut away the extra band(s) and present for publication only the band of interest, which implies to the readers that only one form of protein is expressed and thus the data interpretation is straightforward. Similarly, few IHC studies discuss whether the antibody used is isoform-specific and whether the positive staining is derived from only one isoform. Currently, there is no reliable technique to determine the isoform-specificity of an antibody, especially for IHC. Therefore, cutting away extra band(s) on the membrane usually is a form of misconduct in WB, and a positive staining in IHC only indicates the presence of protein product(s) of the to-be-interrogated gene, and not necessarily the presence of the isoform of interest. We suggest that data of WB and IHC involving only one antibody should not be published and that relevant reports should discuss whether there may be protein multiplicity and whether the antibody used is isoform-specific. Hopefully, techniques will soon emerge that allow determination of not only the presence of protein products of genes but also the isoforms expressed. Copyright © 2016. Published by Elsevier GmbH.

  6. Robust immunohistochemical staining of several classes of proteins in tissues subjected to autolysis.

    Science.gov (United States)

    Maleszewski, Joseph; Lu, Jie; Fox-Talbot, Karen; Halushka, Marc K

    2007-06-01

    Despite the common use of immunohistochemistry in autopsy tissues, the stability of most proteins over extended time periods is unknown. The robustness of signal for 16 proteins (MMP1, MMP2, MMP3, MMP9, TIMP1, TIMP2, TIMP3, AGER, MSR, SCARB1, OLR1, CD36, LTF, LGALS3, LYZ, and DDOST) and two measures of advanced glycation end products (AGE, CML) was evaluated. Two formalin-fixed, paraffin-embedded human tissue arrays containing 16 tissues each were created to evaluate 48 hr of autolysis in a warm or cold environment. For these classes of proteins, matrix metalloproteinases and their inhibitors, scavenger receptors, and advanced glycation end product receptors, we saw no systematic diminution of signal intensity during a period of 24 hr. Analysis was performed by two independent observers and confirmed for a subset of proteins by digital analysis and Western blotting. We conclude that these classes of proteins degrade slowly and faithfully maintain their immunohistochemistry characteristics over at least a 24-hr time interval in devitalized tissues. This study supports the use of autopsy tissues with short postmortem intervals for immunohistochemical studies for diseases such as diabetic vascular disease, cancer, Alzheimer's disease, atherosclerosis, and other pathological states. This manuscript contains online supplemental material at http://www.jhc.org. Please visit this article online to view these materials.

  7. Image files of planarians analyzed by in situ hybridication and immunohistochemical staining - Plabrain DB | LSDB Archive [Life Science Database Archive metadata

    Lifescience Database Archive (English)

    Full Text Available List Contact us Plabrain DB Image files of planarians analyzed by in situ hybridication and immunohistochemi...cal staining Data detail Data name Image files of planarians analyzed by in situ hybridication and immunohis...sion patterns by whole-mount in situ hybridication and also protein distribution by immuno...Images are displayed in A list of image files of planarians analyzed by in situ hybridication and immunohist...le search URL - Data acquisition method Whole-mount in situ hybridication, immunohistochemical staining Data

  8. Heparin priming of EUS-FNA needles does not adversely affect tissue cytology or immunohistochemical staining.

    Science.gov (United States)

    Diehl, David L; Mok, Shaffer R S; Khara, Harshit S; Johal, Amitpal S; Kirchner, H Lester; Lin, Fan

    2018-03-01

     Endoscopic ultrasound (EUS)-guided fine-needle aspiration (FNA) or biopsy (FNB) is an indispensable diagnostic tool. Improvements in needling technique have led to increasing tissue yields. Blood clogging of the needle can cause difficulties with specimen handling and stylet passage, which improves when the needle is primed with heparin before use. However, the effect of heparin on cytology, histology or immunochemistry (IHC) of FNA and FNB specimens is unknown. The goal of the study was to evaluate heparin priming on cytologic/histologic appearance, IHC staining, ease of stylet passage, and specimen bloodiness.  This was a retrospective study of patients undergoing EUS-FNA/FNB. Needle sizes were 25 gauge (g), 22 g, and 19 g. Heparin priming of the needle was done and the stylet replaced ("dry heparin") or suction attached without replacing the stylet ("wet heparin"). Smears and cellblocks were examined by pathologists, and IHC staining were done as needed. Specimen bloodiness was compared with matched controls.  Adequate tissue yields were obtained in all samples (37 heparin, 36 no heparin). Heparin priming did not exhibit negative effects on cytologic or histologic interpretation of the specimens, nor IHC. There was no difference in cellblock bloodiness between the heparin primed needle specimens and the non-heparin control group. .  Heparin priming of EUS-FNA or FNB needles does not negatively affect cytologic or histologic interpretation, nor interfere with IHC. In addition, heparin priming does not increase specimen bloodiness. When the "wet suction" technique is used for EUS-FNA, heparin priming can be used instead of saline priming of the EUS needle.

  9. Complete chromogen separation and analysis in double immunohistochemical stains using Photoshop-based image analysis.

    Science.gov (United States)

    Lehr, H A; van der Loos, C M; Teeling, P; Gown, A M

    1999-01-01

    Simultaneous detection of two different antigens on paraffin-embedded and frozen tissues can be accomplished by double immunohistochemistry. However, many double chromogen systems suffer from signal overlap, precluding definite signal quantification. To separate and quantitatively analyze the different chromogens, we imported images into a Macintosh computer using a CCD camera attached to a diagnostic microscope and used Photoshop software for the recognition, selection, and separation of colors. We show here that Photoshop-based image analysis allows complete separation of chromogens not only on the basis of their RGB spectral characteristics, but also on the basis of information concerning saturation, hue, and luminosity intrinsic to the digitized images. We demonstrate that Photoshop-based image analysis provides superior results compared to color separation using bandpass filters. Quantification of the individual chromogens is then provided by Photoshop using the Histogram command, which supplies information on the luminosity (corresponding to gray levels of black-and-white images) and on the number of pixels as a measure of spatial distribution. (J Histochem Cytochem 47:119-125, 1999)

  10. Immunohistochemical staining of Langerhans cells in HPV-positive and HPV-negative cases of oral squamous cells carcinoma

    Directory of Open Access Journals (Sweden)

    Karuza Maria Alves Pereira

    2011-08-01

    Full Text Available The Human Papillomavirus (HPV has been strongly implicated in development of some cases of oral squamous cell carcinoma (OSCC. However, the immunological system somehow reacts against the presence of this virus. Among the cells involved in such mechanism of defense Langerhans cells (LC stand out, which are responsible for processing and presenting antigens. OBJECTIVES: The purposes of this study were to investigate the presence of HPV DNA and to evaluate the immunohistochemical reactivity for Langerhans cells between HPV-positive and HPV-negative OSCC. Twenty-seven cases of OSSC were evaluated. MATERIAL AND METHODS: DNA was extracted from paraffin-embedded tissue samples and amplified by Polymerase Chain Reaction (PCR for the detection of HPV DNA. Viral typing was performed by dot blot hybridization. Immunohistochemistry was performed by the Streptavidin-biotin technique. RESULTS: From the 27 cases, 9 (33.3% were HPV-positive and 18 (66.0% HPV-negative. HPV 18 was the most prevalent viral type (100% cases and infection with HPV-16 (co-infection was detected in only 1 case. In the OSCC specimens examined, immunoreactivity to S-100 antibody was detected in all cases, with a mean number of 49.48±30.89 Langerhans cells positive for immunostaining. The mean number of immunostained Langerhans cells was smaller in the HPV-positive cases (38 cells/case than in the HPV-negative cases (42.5 cells/case, but this difference was not significant (p=0.38. CONCLUSIONS: The low frequency of detection of HPV DNA in OSCC indicates a possible participation of the virus in the development and progression of only a subgroup of these tumors. There was no association between the immunohistochemical labeling for Langerhans cells (S-100+ and HPV infection of in OSSC. These findings suggest that the presence of HPV in such OSCC cases could not alter the immunological system, particularly the Langerhans cells.

  11. Immunohistochemical Ki-67/KL1 double stains increase accuracy of Ki-67 indices in breast cancer and simplify automated image analysis

    DEFF Research Database (Denmark)

    Nielsen, Patricia S; Bentzer, Nina K; Jensen, Vibeke

    2014-01-01

    observers and automated image analysis. RESULTS: Indices were predominantly higher for single stains than double stains (P≤0.002), yet the difference between observers was statistically significant (Pmanual and automated indices ranged from 0...... by digital image analysis. This study aims to detect the difference in accuracy and precision between manual indices of single and double stains, to develop an automated quantification of double stains, and to explore the relation between automated indices and tumor characteristics when quantified...... in different regions: hot spots, global tumor areas, and invasive fronts. MATERIALS AND METHODS: Paraffin-embedded, formalin-fixed tissue from 100 consecutive patients with invasive breast cancer was immunohistochemically stained for Ki-67 and Ki-67/KL1. Ki-67 was manually scored in different regions by 2...

  12. QUANTIFICATION OF AREA PERCENTAGE OF IMMUNOHISTOCHEMICAL STAINING BY TRUE COLOR IMAGE-ANALYSIS WITH APPLICATION OF FIXED THRESHOLDS

    NARCIS (Netherlands)

    WILLEMSE, F; HENZENLOGMANS, SC; EGGINK, HF

    1994-01-01

    Most image analysis systems (IAS) use black-and-white cameras. However, true color IASs are considered to be useful for quantification of immunohistologically stained structures. Using a true color IAS, we evaluated two methods of segmentation for quantification of area percentage of staining: one

  13. Comparative evaluation of eosinophils in normal mucosa, dysplastic mucosa and oral squamous cell carcinoma with hematoxylin-eosin, Congo red, and EMR1 immunohistochemical staining techniques.

    Science.gov (United States)

    Kargahi, Neda; Razavi, Sayyed Mohammad; Deyhimi, Parviz; Homayouni, Solmaz

    2015-01-01

    Oral squamous cell carcinoma is the most common malignant lesion of the oral cavity, and it involves various molecular mechanisms. The development of oral squamous cell carcinoma is influenced by the host immune cells, such as eosinophils. The present study was conducted to compare the presence of eosinophils in normal mucosa, dysplastic mucosa, and oral squamous cell carcinoma by -hematoxylin- eosin staining, Congo red staining, and epidermal growth factor-like (EGF-like) module containing a mucin-like hormone receptor1 (EMR1) immunohistochemical marker. In this cross-sectional study, 60 paraffinized samples were selected, consisting of 20 normal mucosae, 20 dysplastic mucosae, and 20 squamous cell carcinoma samples. After confirmation of the diagnosis, the mean number of eosinophils was evaluated by hematoxylin-eosin, Congo red, and immunohystochemical staining techniques. The data were analyzed by SPSS-10 software using the Kruskal-Wallis and Friedman tests. The results showed that the number of eosinophils in dysplastic mucosa was significantly higher than the number in normal mucosa, and the number of eosinophils in squamous cell carcinoma was significantly higher than the number in dysplastic mucosa in all staining techniques (pCongo red and hematoxylin - eosin (H&E) staining techniques were used (p<0.001). It can be argued that eosinophil contributes to the identification of lesions that have a higher potential of malignant transformation. Moreover, eosinophil can be suggested as an indicator in the differentiation of oral lesions in cases with borderline diagnosis and in targeted molecular therapy.

  14. Comparison of direct and indirect immunofluorescence staining of clinical specimens for detection of respiratory syncytial virus antigen.

    OpenAIRE

    Minnich, L L; Ray, C G

    1982-01-01

    Immunofluorescence staining methods for respiratory syncytial virus antigen detection were compared. Of 50 specimens originally positive for respiratory syncytial virus by direct immunofluorescence and culture, 49 were positive by repeat direct immunofluorescence and 32 were positive by indirect immunofluorescence. Additional results obtained on specimens originally negative for respiratory syncytial virus by direct immunofluorescence, culture, or both indicate that direct immunofluorescence ...

  15. Carcinoembryonic antigen as a biomarker for meconium-stained amniotic fluid.

    Science.gov (United States)

    Mor, Amir; Tal, Reshef; Irani, Mohamad; McCalla, Sandra; Haberman, Shoshana; Garg, Deepika; Wajntraub, Birgitta

    2016-03-01

    To assess whether elevated carcinoembryonic antigen (CEA) concentration in amniotic fluid can indicate meconium-stained amniotic fluid (MSAF). In a prospective cohort study, women with a term singleton pregnancy who were in labor but had intact membranes were recruited at a center in Israel over a 5-month period in 2013. Only women who subsequently underwent artificial rupture of membranes following a clear medical indication were included. Samples of amniotic fluid, urine, and serum were collected. Amniotic fluid was examined by sight and classified as clear, MSAF, or undetermined. CEA concentration in the samples was measured. Among 81 participants, 45 had clear amniotic fluid, 28 had MSAF, and eight had undetermined amniotic fluid. Mean CEA concentration was more than 10 times higher in MSAF (2658 μg/L, standard error 250) than in clear amniotic fluid (238 μg/L, standard error 29; P<0.001). Receiver operating characteristic curve analysis demonstrated a sensitivity of 96% and a specificity of 100% for distinguishing MSAF from clear amniotic fluid at a CEA cutoff of 799.2 μg/L. CEA concentrations in urine and serum were all within the normal range (≤5 μg/L), irrespective of amniotic fluid status. High CEA concentrations in amniotic fluid can assist in the diagnosis of MSAF. These findings could provide the basis for a bedside test to detect MSAF following rupture of membranes. Copyright © 2015 International Federation of Gynecology and Obstetrics. Published by Elsevier Ireland Ltd. All rights reserved.

  16. Pelacakan Secara Imunohistokimiawi Antigen Virus pada Ayam yang Diinfeksi dengan Virus Penyakit Tetelo (IMMUNOHISTOCHEMICAL DETECTION OF VIRAL ANTIGEN IN TISSUE OF CHICKENS EXPERIMENTALLY INFECTED WITH NEWCASTLE DISEASE VIRUS

    Directory of Open Access Journals (Sweden)

    Anak Agung Ayu Mirah Adi

    2013-07-01

    Full Text Available In order to study the distribution of Newcastle disease virus (NDV following infection, chickenswere experimentally infected with visceretropic velogenic NDV isolate. Monoclonal antibodies (mAbsagainst the NDV LaSota vaccine strain were then produced to detect viral antigen in the infectedorgans. The mAbs were firstly tested for their specificity by enzyme linked immunosorbent assay(ELISA using NDV and normal allantoic fluids as antigens. Eight mAbs specific against NDVwere isolated and two mAbs were used for immunodetection of NDV antigen in chicken’s tissues.By immunohistochemistry labeled streptavidin-biotin (LSAB staining NDV–antigen was detectedin paraffin embedded tissues of NDV-infected chickens. NDV antigen was not detected in noninfected chickens. In the infected chickens, high intensity of NDV antigen was detected in thelymphoid tissues, lung and intestine. The NDV antigen with a lesser intensity was detected in thebrain, trachea, liver and myocardium. This study shows that although viscerotropic velogenicNDV isolate can infect almost all organs, the main target of infection are lung, intestine andlymphoids tissues

  17. TP53 Staining in Tissue Samples of Chronic Lymphocytic Lymphoma Cases: An Immunohistochemical Survey of 51 Cases

    Directory of Open Access Journals (Sweden)

    İbrahim Kulaç

    2017-03-01

    Full Text Available Objective: Chronic lymphocytic leukemia (CLL is the most common lymphoproliferative disease in adults. The aim of this study is to find out if the extent of proliferation centers or the immunohistochemical expression of p53 is related to disease prognosis. Materials and Methods: In the scope of this study, 54 biopsy specimens from 51 patients (50 of lymph nodes; the others of spleen, tonsil, orbit, and liver diagnosed with CLL at the Hacettepe University Department of Pathology in 2000-2013 were reevaluated. The clinical and demographic data of the patients were obtained from our patient database. Biopsy samples were assessed semi-quantitatively for the percentage of proliferation center/total biopsy area (PC/TBA and an immunohistochemical study was performed on representative blocks of tissues for p53 expression. Results: When the patients were divided into two categories according to Rai stage as high and low (stages 0, 1, and 2 vs. stages 3 and 4, it was seen that patients with low Rai stage had a better prognosis than those with high stages (p=0.030. However, there was no statistically significant correlation between overall survival and PC/TBA ratio or p53 expression levels. Conclusion: In our cohort, PC/TBA ratio and immunopositivity of p53 did not show correlations with overall survival.

  18. Immunohistochemical staining for thyroid peroxidase (TPO) of needle core biopsies in the diagnosis of scintigraphically cold thyroid nodules

    DEFF Research Database (Denmark)

    Yousaf, U.; Christensen, Lars Høj; Rasmussen, A.K.

    2008-01-01

    BACKGROUND: Cold thyroid nodules are common, in particular in iodine-deficient areas, but only a minority of them are malignant requiring surgery. Thyroid peroxidase (TPO) immunostaining of fine-needle aspiration cytology (FNAC) material has proven helpful in diagnosing cells from malignant lesions......, but the procedure has its limitations in a routine setting. PURPOSE: To improve diagnosis and reduce surgery rate, the FNAC procedure was replaced by needle core biopsy (NCB), which was routinely stained for TPO by the monoclonal antibody mAb 47. MATERIALS AND METHODS: During a 5-year period 427 consecutive...... patients with a cold thyroid nodule were evaluated by ultrasound-guided NCB, which had been routinely stained for TPO in an automated immunostainer. Sensitivity and specificity and predictive values of the TPO immunostaining were estimated, based on the final diagnosis obtained from surgical resection...

  19. Characterization of ELISA Antibody-Antigen Interaction using Footprinting-Mass Spectrometry and Negative Staining Transmission Electron Microscopy

    Science.gov (United States)

    Lin, Margaret; Krawitz, Denise; Callahan, Matthew D.; Deperalta, Galahad; Wecksler, Aaron T.

    2018-03-01

    We describe epitope mapping data using multiple covalent labeling footprinting-mass spectrometry (MS) techniques coupled with negative stain transmission electron microscopy (TEM) data to analyze the antibody-antigen interactions in a sandwich enzyme-linked immunosorbant assay (ELISA). Our hydroxyl radical footprinting-MS data using fast photochemical oxidation of proteins (FPOP) indicates suppression of labeling across the antigen upon binding either of the monoclonal antibodies (mAbs) utilized in the ELISA. Combining these data with Western blot analysis enabled the identification of the putative epitopes that appeared to span regions containing N-linked glycans. An additional structural mapping technique, carboxyl group footprinting-mass spectrometry using glycine ethyl ester (GEE) labeling, was used to confirm the epitopes. Deglycosylation of the antigen resulted in loss of potency in the ELISA, supporting the FPOP and GEE labeling data by indicating N-linked glycans are necessary for antigen binding. Finally, mapping of the epitopes onto the antigen crystal structure revealed an approximate 90° relative spatial orientation, optimal for a noncompetitive binding ELISA. TEM data shows both linear and diamond antibody-antigen complexes with a similar binding orientation as predicted from the two footprinting-MS techniques. This study is the first of its kind to utilize multiple bottom-up footprinting-MS techniques and TEM visualization to characterize the monoclonal antibody-antigen binding interactions of critical reagents used in a quality control (QC) lot-release ELISA. [Figure not available: see fulltext.

  20. Quantitation of Protein Expression and Co-localization Using Multiplexed Immuno-histochemical Staining and Multispectral Imaging.

    Science.gov (United States)

    Bauman, Tyler M; Ricke, Emily A; Drew, Sally A; Huang, Wei; Ricke, William A

    2016-04-08

    Immunohistochemistry is a commonly used clinical and research lab detection technique for investigating protein expression and localization within tissues. Many semi-quantitative systems have been developed for scoring expression using immunohistochemistry, but inherent subjectivity limits reproducibility and accuracy of results. Furthermore, the investigation of spatially overlapping biomarkers such as nuclear transcription factors is difficult with current immunohistochemistry techniques. We have developed and optimized a system for simultaneous investigation of multiple proteins using high throughput methods of multiplexed immunohistochemistry and multispectral imaging. Multiplexed immunohistochemistry is performed by sequential application of primary antibodies with secondary antibodies conjugated to horseradish peroxidase or alkaline phosphatase. Different chromogens are used to detect each protein of interest. Stained slides are loaded into an automated slide scanner and a protocol is created for automated image acquisition. A spectral library is created by staining a set of slides with a single chromogen on each. A subset of representative stained images are imported into multispectral imaging software and an algorithm for distinguishing tissue type is created by defining tissue compartments on images. Subcellular compartments are segmented by using hematoxylin counterstain and adjusting the intrinsic algorithm. Thresholding is applied to determine positivity and protein co-localization. The final algorithm is then applied to the entire set of tissues. Resulting data allows the user to evaluate protein expression based on tissue type (ex. epithelia vs. stroma) and subcellular compartment (nucleus vs. cytoplasm vs. plasma membrane). Co-localization analysis allows for investigation of double-positive, double-negative, and single-positive cell types. Combining multispectral imaging with multiplexed immunohistochemistry and automated image acquisition is an

  1. Investigations of FIBCD1: Immunohistochemical localization and immunomodulatory role upon helminth antigen stimulation in colon epithelium

    DEFF Research Database (Denmark)

    von Huth, Sebastian; Skallerup, Sofie; Buragaite, Benita

    as a pattern recognition receptor in the innate immune response. Aim: In the present study, we investigate the localization of FIBCD1 in 49 different healthy human tissues by immunohistochemistry. Further, we investigate the in vitro effects of excretory-secretory (ES) antigens from pig whipworm (Trichuris...... system. FIBCD1 binds to ES antigens. Stimula-tion with ES antigens does not appear to be influenced by FIBCD1 transfection in vitro. FIBCD1 may play a role in whipworm infections in vivo....

  2. Immunohistochemical study of p53 and proliferating cell nuclear antigen expression in odontogenic keratocyst and periapical cyst

    Directory of Open Access Journals (Sweden)

    Thara Purath Sajeevan

    2014-01-01

    Full Text Available Introduction: p53 protein is a product of p53 gene, which is now classified as a tumor suppressor gene. The gene is a frequent target for mutation, being seen as a common step in the pathogenesis of many human cancers. Proliferating cell nuclear antigen (PCNA is an auxiliary protein of DNA polymerase delta and plays a critical role in initiation of cell proliferation. Aim: The aim of this study is to assess and compare the expression of p53 and PCNA in lining epithelium of odontogenic keratocyst (OKC and periapical cyst (PA. Materials and Methods: A total of 20 cases comprising 10 OKC and 10 PA were included in retrospective study. Three paraffin section of 4 μm were cut, one was used for routine hematoxylin and eosin stain, while the other two were used for immunohistochemistry. Statistical analysis was performed using Chi-square test. Results: The level of staining and intensity were assessed in all these cases. OKC showed PCNA expression in all cases (100%, whereas in perapical cyst only 60% of cases exhibited PCNA staining. (1 OKC showed p53 expression in 6 cases (60% whereas in PA only 10% of the cases exhibited p53 staining. Chi-square test showed PCNA staining intensity was more significant than p53 in OKC. (2 The staining intensity of PA using p53, PCNA revealed that PCNA stating intensity was more significant than p53. Conclusion: OKC shows significant proliferative activity than PA using PCNA and p53. PCNA staining was more intense when compared with p53 in both OKC and PA.

  3. A novel histological examination with dynamic three-dimensional reconstruction from multiple immunohistochemically stained sections of a PD-L1-positive colon cancer.

    Science.gov (United States)

    Korehisa, Shotaro; Ikeda, Tetsuo; Okano, Shinji; Saeki, Hiroshi; Oki, Eiji; Oda, Yoshinao; Hashizume, Makoto; Maehara, Yoshihiko

    2018-03-01

    Programmed cell death-ligand 1 (PD-L1) expression is observed in patients with microsatellite instability-high (MSI-H) colon cancer, which is susceptible to immune checkpoint blockade. The aim of this study was to investigate the interrelationship between PD-L1-positive cells and cytotoxic T cells, lymphatic vessels and vascular endothelium by using histological examination with the three-dimensional (3D) reconstruction of a PD-L1-positive colon cancer. Serial sections of MSI-H colon cancer tissue were stained with haematoxylin and eosin (H&E) and Masson trichrome stains; immunohistochemical analysis of PD-L1, CD8, D2-40 and CD31 was performed. Several 3D models of MSI-H colon cancer were reconstructed with a 3D data visualisation system. Moreover, 18 serial sections were stained with PD-L1, cytokeratin AE1/AE3, CD45, CD31, CD68 and H&E in the same case to confirm that PD-L1 was expressed on tumour cells, CD31-positive cells and macrophages in the invasive frontal region. Notably, there was a peak in the expression of PD-L1 and CD31 in the invasive frontal region. D2-40-positive cells were abundant in the overall tumour stroma, and CD8-positive cells infiltrated the tumour parenchyma. PD-L1 was expressed on tumour cells in the parenchyma and other cells in the stroma. Additional staining of 18 consecutive sections revealed that the other cells were CD68-positive and CD45-positive macrophages and CD31-positive proliferating vascular endothelial cells. We confirmed that PD-L1 was highly expressed in the invasive frontal region in 3D models of MSI-H colon cancer tissue. This method can be useful for accurately evaluating the localisation of immune checkpoint molecules. © 2017 John Wiley & Sons Ltd.

  4. Cellular Neurofibroma with Atypia Mimics Sarcoma: Report of a Case with Immunohistochemical Staining Pattern Analysis and Literature Review

    Directory of Open Access Journals (Sweden)

    Shih-Wen Hu

    2006-10-01

    Full Text Available A case of two sporadic cellular neurofibromas with atypia and one widespread hyalinization neurofibroma of the lumbar spine in a 51-year-old man without evidence of neurofibromatosis-1 is reported. Cellular neurofibroma with atypia is an unusual variant. The definite criteria for lowgrade and high-grade malignant peripheral nerve sheath tumors as well as cellular neurofibroma are not well defined in the literature. The clinical significance of atypical cellular neurofibroma has rarely been systematically studied. To our knowledge, the concomitance of cellular architecture and cytologic atypia is rarely documented, and this is a rare report of atypical cellular neurofibroma. The recognition of this entity is of great importance to both pathologists and clinicians because atypical cellular neurofibroma is clever at masquerading both histologically and cytologically as a sarcoma; therefore, a precise diagnosis of this variant is essential because of the differences in treatment and clinical behavior between benignancy and malignancy. We also examined the immunohistochemical characteristics of CD34 positive cells and focal high expression of p53 up to 73% encountered in our case. To our knowledge, seldom have series or case reports elucidated this phenomenon.

  5. Immunohistochemical staining for thyroid peroxidase (TPO) of needle core biopsies in the diagnosis of scintigraphically cold thyroid nodules.

    Science.gov (United States)

    Yousaf, U; Christensen, L H; Rasmussen, A K; Jensen, F; Mollerup, C L; Kirkegaard, J; Lausen, I; Rank, F; Feldt-Rasmussen, U

    2008-06-01

    Cold thyroid nodules are common, in particular in iodine-deficient areas, but only a minority of them are malignant requiring surgery. Thyroid peroxidase (TPO) immunostaining of fine-needle aspiration cytology (FNAC) material has proven helpful in diagnosing cells from malignant lesions, but the procedure has its limitations in a routine setting. To improve diagnosis and reduce surgery rate, the FNAC procedure was replaced by needle core biopsy (NCB), which was routinely stained for TPO by the monoclonal antibody mAb 47. During a 5-year period 427 consecutive patients with a cold thyroid nodule were evaluated by ultrasound-guided NCB, which had been routinely stained for TPO in an automated immunostainer. Sensitivity and specificity and predictive values of the TPO immunostaining were estimated, based on the final diagnosis obtained from surgical resection. The majority of nodules with benign NCB diagnosis were not surgically removed, and thus a subgroup of 140 operated nodules formed the basis for the calculations. Sensitivity and specificity for benign and malignant lesions were 100% if the oxyphilic variant of adenomas and minimally invasive follicular carcinomas were excluded. By inclusion of these, the values fell to 89% and 97%, respectively. The predictive value of a positive test was 96% and the predictive value of a negative test was 97%. TPO immunostaining was found to be a valuable adjunct to morphology in the diagnosis of cold thyroid nodules of the nonoxyphilic type.

  6. Clinicopathological features and immunohistochemical detection of antigens in acute experimental Streptococcus agalactiae infection in red tilapia (Oreochromis spp.).

    Science.gov (United States)

    Abdullah, Syuhaidah; Omar, Noraini; Yusoff, Sabri Mohd; Obukwho, Emikpe Benjamin; Nwunuji, Tanko Polycarp; Hanan, Latifah; Samad, Jamil

    2013-01-01

    This study investigates the clinicopathological features of acute experimental streptococcosis in red tilapia using various routes of infection; intraperitoneal (IP), immersion (IM) and immersion cut (IC). Twenty four red tilapia in duplicates were inoculated intraperitoneally with 10(9) CFU/ml of S. agalactiae while another sets: intact, one with sharp cut at the tail end were exposed to bacterial inoculums 10(9) CFU/ml diluted in water while two groups of control fish were similarly manipulated. Clinical signs were recorded; samples from the gills, brain, eyes and kidneys were also taken for bacterial isolation and histopathology. Immunohistochemistry (IHC) and polymerase chain reaction (PCR) were employed to detect the antigen. The diseased fish showed skin, fin haemorrhages and exophthalmia with obvious signs in IP at 2 hpc followed by IC and IM at 4 hpc. The lesions were noticed earlier in the kidney and most severe in IP. IHC detected antigen as early as PCR and isolation with intense staining in blood vessel lumen and wall, macrophages in choroid, focal haemorrhage in the renal interstitium and meninges especially in IP followed by IC and IM. The immunolocalisation of the antigen described for the first time further explain the pathogenesis of streptococcosis in red tilapia.

  7. Reduced immunohistochemical PTEN staining is associated with higher progression rate and recurrence episodes in non-invasive low-grade papillary urothelial carcinoma of the bladder.

    Science.gov (United States)

    Kulac, Ibrahim; Arslankoz, Sehbal; Netto, George J; Ertoy Baydar, Dilek

    2018-01-24

    Non-invasive low-grade papillary urothelial carcinoma (NILGPUC) of the bladder is regarded as a relatively indolent disease. However, its propensity for frequent recurrences constitutes a major clinical problem. Additionally, there is a progression risk of 10-15% to either a higher grade and/or a higher stage disease in these tumors. The molecular factors that will predict recurrence and progression in low-grade pTa bladder carcinoma have not yet been elucidated. Herein, we investigated the association of phosphatase and tensin homolog deleted on chromosome 10 (PTEN) alterations with recurrence and progression in NILGPUC using immunohistochemistry. Eighty-one cases of bladder cancer initially diagnosed as NILGPUC in a single institution with follow-up were encountered after searching medical records. Tissue microarrays (TMA) that contained both tumor and non-neoplastic mucosa from each case were constructed using paraffin blocks of transurethral resections. Sections from TMA blocks were stained immunohistochemically for PTEN protein and were evaluable in 76 cases. Any absence of staining was recorded and correlated with clinical findings. Ten patients (13.2%) showed progression and 41 (53.9%) showed recurrence. Reduced PTEN expression was observed in 29 cases (38.1%). Cases with reduced PTEN had higher progression rate compared to cases with intact PTEN (p = 0.026). Tumor relapse was more frequent in cases with reduced PTEN (65.5 vs 46.8%), but this difference was not statistically significant (p = 0.112). On the other hand, decreased PTEN expression was associated with higher number of recurrence episodes (p = 0.002). PTEN seems to have a link with the disease course in NILGPUC of the bladder.

  8. Immunohistochemical localization of smooth muscle myosin in human spleen, lymph node, and other lymphoid tissues. Unique staining patterns in splenic white pulp and sinuses, lymphoid follicles, and certain vasculature, with ultrastructural correlations.

    Science.gov (United States)

    Pinkus, G. S.; Warhol, M. J.; O'Connor, E. M.; Etheridge, C. L.; Fujiwara, K.

    1986-01-01

    The anatomic distribution of smooth muscle myosin, a contractile protein, was determined in a variety of lymphoid tissues (spleen, lymph nodes, tonsils) with the use of highly specific rabbit antibodies to human uterine smooth muscle myosin and an indirect immunoperoxidase technique. In the spleen, in addition to the anticipated immunoreactivity in the walls of arteries, veins, splenic capsule, and trabeculas, other staining patterns were observed. Smooth muscle myosin-containing cells which comprised the adventitia of the trabecular arteries appeared continuous with myosin-containing reticular cells of the white pulp. The latter cells assumed a circumferential pattern within the periarteriolar lymphoid sheaths, then blended delicately with the red pulp at the marginal zone. Ultrastructurally, immunogold techniques demonstrated that smooth muscle myosin in these cells was localized to cytoplasmic filaments. Within the red pulp, a different and distinct staining pattern was observed for the splenic sinuses. Short, regular, orderly, and repetitive bands of immunoreactivity, aligned parallel to the long axis of the sinus, extended between contiguous ring fibers. By immunoelectron microscopy these structures corresponded to distinct bundles of filaments in the endothelial lining cells of the splenic sinuses. Factor VIII associated antigen was also identified in the splenic lining cells in cryostat and paraffin sections, and ultrastructurally. Within the red pulp of the spleen, the sheaths of sheathed capillaries also revealed strong immunoreactivity for smooth muscle myosin. Other sites of immunohistochemical localization of smooth muscle myosin included dendritic reticulum cells present in reactive follicles and in nodular non-Hodgkin's lymphomas. Certain vascular structures, specifically sinus lining cells and Schweigger-Seidel capillary sheaths of the spleen and postcapillary venules of lymph nodes and tonsils, coexpressed smooth muscle myosin and Factor VIII

  9. Osteosarcomas and chondrosarcomas of the jaws: immunohistochemical correlations.

    Science.gov (United States)

    Regezi, J A; Zarbo, R J; McClatchey, K D; Courtney, R M; Crissman, J D

    1987-09-01

    Clinical, microscopic, and immunohistochemical characteristics of 17 jaw sarcomas are reported. Histologic subtypes included chondroblastic (five), fibroblastic (five), osteoblastic (three), telangiectatic (one), parosteal (two), and chondrosarcoma (one). Reactivity for all antigenic markers in decalcified tissue was judged to be comparable to nondecalcified tissue. All neoplasms were nonreactive for muramidase and leukocyte common antigen. alpha-1 Antichymotrypsin and HLA-DR immunoreactivity was found focally. Positive S-100 staining was found predominantly in chondrocytes. All tumors were positive for vimentin. Cells in focal zones of cartilage were positive for keratin. No distinctive pattern emerged relative to clinical recurrence and histologic subtype or immunotype. Leukocyte common antigen determinations were useful because they distinguished between neoplastic and inflammatory cells. S-100 protein stains helped in the subclassification of chondroblastic osteosarcoma, and vimentin stains confirmed mesenchymal origin. Cross-reactive staining of cartilage with keratin antibodies was regarded as a possible diagnostic pitfall.

  10. Immunohistochemical staining with non-phospho β-catenin as a diagnostic and prognostic tool of COX-2 inhibitor therapy for patients with extra-peritoneal desmoid-type fibromatosis.

    Science.gov (United States)

    Sakai, Tomohisa; Nishida, Yoshihiro; Hamada, Shunsuke; Koike, Hiroshi; Ikuta, Kunihiro; Ota, Takehiro; Ishiguro, Naoki

    2017-08-29

    Immunohistochemical staining with conventional anti-β-catenin antibody has been applied as a diagnostic tool for desmoid-type fibromatosis (DF). This study aimed to evaluate the diagnostic and prognostic value of immunohistochemical staining with anti-non-phospho β-catenin antibody, which might more accurately reflect the aggressiveness of DF, in comparison to the conventional anti-β-catenin antibody. Between 2003 and 2015, 40 patients with extra-peritoneal sporadic DF were prospectively treated with meloxicam or celecoxib, a COX-2 inhibitor, therapy. The efficacy of this treatment was evaluated according to Response Evaluation Criteria in Solid Tumors (RECIST). Immunohistochemical staining was performed on formalin-fixed material to evaluate the expression of β-catenin and non-phospho β-catenin, and the positivity was grouped as negative, weak, moderate, and strong. DNA was isolated from frozen tissue or formalin-fixed materials, and the CTNNB1 mutation status was determined by direct sequencing. Of the 40 patients receiving COX-2 inhibitor treatment, there was one with complete remission, 12 with partial remission, 7 with stable disease, and 20 with progressive disease. The mutation sites in CTNNB1 were detected in 22 (55%) of the 40 cases: T41A (17 cases), S45F (3 cases), and T41I and S45P (1 each). The positive nuclear expression of non-phospho β-catenin showed a significant correlation with positive CTNNB1 mutation status detected by Sanger method (p = 0.025), and poor outcome in COX-2 inhibitor therapy (p = 0.022). In contrast, nuclear expression of β-catenin did not show a significant correlation with either CTNNB1 mutation status (p = 0.43) or outcome of COX-2 inhibitor therapy (p = 0.38). Nuclear expression of non-phospho β-catenin might more appropriately reflect the biological behavior of DF, and immunohistochemical staining with non-phospho β-catenin could serve as a more useful diagnostic and prognostic tool of COX-2 inhibitor therapy

  11. Harmonisation of short-term in vitro culture for the expansion of antigen-specific CD8(+) T cells with detection by ELISPOT and HLA-multimer staining.

    Science.gov (United States)

    Chudley, Lindsey; McCann, Katy J; Coleman, Adam; Cazaly, Angelica M; Bidmon, Nicole; Britten, Cedrik M; van der Burg, Sjoerd H; Gouttefangeas, Cecile; Jandus, Camilla; Laske, Karoline; Maurer, Dominik; Romero, Pedro; Schröder, Helene; Stynenbosch, Linda F M; Walter, Steffen; Welters, Marij J P; Ottensmeier, Christian H

    2014-11-01

    Ex vivo ELISPOT and multimer staining are well-established tests for the assessment of antigen-specific T cells. Many laboratories are now using a period of in vitro stimulation (IVS) to enhance detection. Here, we report the findings of a multi-centre panel organised by the Association for Cancer Immunotherapy Immunoguiding Program to investigate the impact of IVS protocols on the detection of antigen-specific T cells of varying ex vivo frequency. Five centres performed ELISPOT and multimer staining on centrally prepared PBMCs from 3 donors, both ex vivo and following IVS. A harmonised IVS protocol was designed based on the best-performing protocol(s), which was then evaluated in a second phase on 2 donors by 6 centres. All centres were able to reliably detect antigen-specific T cells of high/intermediate frequency both ex vivo (Phase I) and post-IVS (Phase I and II). The highest frequencies of antigen-specific T cells ex vivo were mirrored in the frequencies following IVS and in the detection rates. However, antigen-specific T cells of a low/undetectable frequency ex vivo were not reproducibly detected post-IVS. Harmonisation of the IVS protocol reduced the inter-laboratory variation observed for ELISPOT and multimer analyses by approximately 20 %. We further demonstrate that results from ELISPOT and multimer staining correlated after (P < 0.0001 and R (2) = 0.5113), but not before IVS. In summary, IVS was shown to be a reproducible method that benefitted from method harmonisation.

  12. The Significance of Immunohistochemical Staining, Including that for Glucose Transporter Protein Isoform 1, as Related to the Clinical and Angiographic Features of Adult Soft-Tissue Hemangioma and Arteriovenous Malformation in the Head and Neck

    International Nuclear Information System (INIS)

    Lee, Ha Young; Kim, Seon Mi; Choi, Jin Woo

    2009-01-01

    Glucose transporter protein isoform 1 (GLUT1) has been introduced to diagnose the hemangiomas of infancy. We investigated the usefulness of several immunohistochemical markers, including GLUT1, as related with the clinical and radiologic findings for making the diagnosis of adult subcutaneous vascular lesions in the head and neck. Materials and Methods: The 24 patients who underwent operations for soft tissue vascular lesion during the previous 7 years were included in this study. We analyzed the angiographic data, the clinical data and the immunohistochemical study results, including the GLUT1, S-100 protein and Movat pentichrome staining. Results: Twenty-two patients were confirmed to have arteriovenous malformation (AVM) and two hemangiomas, respectively. The number of lesions with positive Movat pentichrome, S-100 and GLUT1 staining in the patients with AVM and those patients with hemangioma were 22/22, 20/22 and 0/22, and 0/2, 0/2 and 0/2, respectively. For the 22 patients with AVMs, eight had a soft tissue vascular lesion at birth, 13 had cutaneous change and 15 had a change of the size of the lesion. For the 2 patients with one hemangioma each, neither patient had a soft tissue vascular lesion at birth, and both patients had cutaneous change and a change of the size of the lesion. The angiograms revealed a focal hypervascular mass (19/24) or diffuse staining (5/24) without showing significant features for making the definitive differential diagnosis. Our study revealed that none of the patients with AVM or hemangioma had GLUT1 positivity, and an arteriovenous malformation was more common than the adult-type hemangioma

  13. Immunohistochemical detection of SWC3, CD2, CD3, CD4 and CD8 antigens in paraformaldehyde fixed and paraffin embedded porcine lymphoid tissue

    DEFF Research Database (Denmark)

    Tingstedt, Jens Erik; Tornehave, Ditte; Lind, Peter

    2003-01-01

    Identification of the different cell types of the immune system is important for in situ studies on the pathogenesis of infectious diseases in various animals, including the pig. Unfortunately, many monoclonal anti-leukocyte antibodies are only useful for staining frozen tissue sections with inhe......Identification of the different cell types of the immune system is important for in situ studies on the pathogenesis of infectious diseases in various animals, including the pig. Unfortunately, many monoclonal anti-leukocyte antibodies are only useful for staining frozen tissue sections...... with inherent poor tissue morphology, and are not readily adapted to formaldehyde fixed and paraffin embedded tissue with well preserved morphology. Seven well characterised monoclonal antibodies against porcine leukocyte antigens were tested on neutral buffered paraformaldehyde fixed and paraffin embedded...

  14. A comparison of melanin bleaching and azure blue counterstaining in the immunohistochemical diagnosis of malignant melanoma.

    Science.gov (United States)

    Kligora, C J; Fair, K P; Clem, M S; Patterson, J W

    1999-12-01

    Distinguishing heavily pigmented melanocytes from melanophages on routine hematoxylin and eosin slides can be difficult. Melanin bleaching with potassium permanganate solution is a traditional means of removing melanin from tissues and can be used before immunohistochemical staining to remove any pigment that might be confused with the brown chromogen diaminobenzidine. Azure B stains melanin granules green-blue, easily contrasts with diaminobenzidine, and may be used as a counterstain on unbleached sections after immunohistochemical staining. To our knowledge, studies comparing melanin bleaching with azure B counterstaining in the immunohistochemical evaluation of malignant melanomas have not been performed. Paraffin sections from 33 heavily pigmented malignant melanomas were bleached with a 3.0-g/L potassium permanganate solution, immunohistochemically stained for S-100 and HMB-45, and counterstained with hematoxylin. Unbleached sections were similarly stained for S-100 and HMB-45 and counterstained with azure B. To establish optimal permanganate concentrations, a variable number of sections were bleached with lower permanganate concentrations ranging from 0.125 to 2.5 g/L. S-100 antigenicity was preserved at all permanganate concentrations, whereas HMB-45 antigenicity was abolished at concentrations of 0.5 g/L and greater. At permanganate concentrations from 0.125 to 0.5 g/L, both antigenicities were preserved; however, melanin was incompletely removed. Complications of bleaching included tissue damage and loss of cytologic detail. Positive immunohistochemical staining was observed in azure B counterstained sections. Azure B stained melanin greenblue and was easily distinguished from the brown diaminobenzidine chromogen, regardless of the antibody tested. Neither tissue damage nor loss of cytologic detail was observed. We conclude that the use of azure B counterstaining is superior to permanganate bleaching in the histologic evaluation of heavily pigmented

  15. The mononuclear phagocyte system of the mouse defined by immunohistochemical localisation of antigen F4/80: macrophages associated with epithelia.

    Science.gov (United States)

    Hume, D A; Perry, V H; Gordon, S

    1984-11-01

    The tissue distribution of the murine macrophage-specific antigen F4/80 has been analysed using an immunohistochemical technique. The antigen is observed on all known macrophage populations (including Kupffer cells and bronchoalveolar macrophages) and is absent from any cell types that are definitely not mononuclear phagocytes. Microglial cells from brain express F4/80. F4/80+ macrophages observed associated with epithelia can be divided into two categories, intraepithelial and periepithelial. The former includes epidermal Langerhans cells and cells with similar morphology in other stratified squamous epithelia (cervix, oesophagus), pseudostratified epithelium (trachea), transitional epithelium of urinary bladder, and simple epithelia lining various ducts (salivary gland, common bile duct, tracheobronchial gland). Periepithelial F4/80+ cells, apparently spread immediately below the basal lamina, are associated with simple epithelia throughout the gastrointestinal, respiratory, and male and female reproductive tract as well as the brain ependyma. A major class of periepithelial F4/80+ cells is associated with capillaries throughout the microcirulation. The role of these macrophage populations in control of epithelial function is discussed.

  16. Evaluation of ERG and SPINK1 by Immunohistochemical Staining and Clinicopathological Outcomes in a Multi-Institutional Radical Prostatectomy Cohort of 1067 Patients.

    Science.gov (United States)

    Brooks, James D; Wei, Wei; Hawley, Sarah; Auman, Heidi; Newcomb, Lisa; Boyer, Hilary; Fazli, Ladan; Simko, Jeff; Hurtado-Coll, Antonio; Troyer, Dean A; Carroll, Peter R; Gleave, Martin; Lance, Raymond; Lin, Daniel W; Nelson, Peter S; Thompson, Ian M; True, Lawrence D; Feng, Ziding; McKenney, Jesse K

    2015-01-01

    Distinguishing between patients with early stage, screen detected prostate cancer who must be treated from those that can be safely watched has become a major issue in prostate cancer care. Identification of molecular subtypes of prostate cancer has opened the opportunity for testing whether biomarkers that characterize these subtypes can be used as biomarkers of prognosis. Two established molecular subtypes are identified by high expression of the ERG oncoprotein, due to structural DNA alterations that encode for fusion transcripts in approximately ½ of prostate cancers, and over-expression of SPINK1, which is purportedly found only in ERG-negative tumors. We used a multi-institutional prostate cancer tissue microarray constructed from radical prostatectomy samples with associated detailed clinical data and with rigorous selection of recurrent and non-recurrent cases to test the prognostic value of immunohistochemistry staining results for the ERG and SPINK1 proteins. In univariate analysis, ERG positive cases (419/1067; 39%) were associated with lower patient age, pre-operative serum PSA levels, lower Gleason scores (≤ 3+4=7) and improved recurrence free survival (RFS). On multivariate analysis, ERG status was not correlated with RFS, disease specific survival (DSS) or overall survival (OS). High-level SPINK1 protein expression (33/1067 cases; 3%) was associated with improved RFS on univariate and multivariate Cox regression analysis. Over-expression of either protein was not associated with clinical outcome. While expression of ERG and SPINK1 proteins was inversely correlated, it was not mutually exclusive since 3 (0.28%) cases showed high expression of both. While ERG and SPINK1 appear to identify discrete molecular subtypes of prostate cancer, only high expression of SPINK1 was associated with improved clinical outcome. However, by themselves, neither ERG nor SPINK1 appear to be useful biomarkers for prognostication of early stage prostate cancer.

  17. Attempt of correlative observation of morphological synaptic connectivity by combining confocal laser-scanning microscope and FIB-SEM for immunohistochemical staining technique.

    Science.gov (United States)

    Sonomura, Takahiro; Furuta, Takahiro; Nakatani, Ikuko; Yamamoto, Yo; Honma, Satoru; Kaneko, Takeshi

    2014-11-01

    Ten years have passed since a serial block-face scanning electron microscopy (SBF-SEM) method was developed [1]. In this innovative method, samples were automatically sectioned with an ultramicrotome placed inside a scanning electron microscope column, and the block surfaces were imaged one after another by SEM to capture back-scattered electrons. The contrast-inverted images obtained by the SBF-SEM were very similar to those acquired using conventional TEM. SFB-SEM has made easy to acquire image stacks of the transmission electron microscopy (TEM) in the mesoscale, which is taken with the confocal laser-scanning microcopy(CF-LSM).Furthermore, serial-section SEM has been combined with the focused ion beam (FIB) milling method [2]. FIB-incorporated SEM (FIB-SEM) has enabled the acquisition of three-dimensional images with a higher z-axis resolution com- pared to ultramicrotome-equipped SEM.We tried immunocytochemistry for FIB-SEM and correlated this immunoreactivity with that in CF-LSM. Dendrites of neurons in the rat neostriatum were visualized using a recombinant viral vector. Moreover, the thalamostriatal afferent terminals were immunolabeled with Cy5 fluorescence for vesicular glutamate transporter 2 (VGluT2). After detection of the sites of terminals apposed to the dendrites by using CF-LSM, GFP and VGluT2 immunoreactivities were further developed for EM by using immunogold/silver enhancement and immunoperoxidase/diaminobenzidine (DAB) methods, respectively.We showed that conventional immuno-cytochemical staining for TEM was applicable to FIB-SEM. Furthermore, several synaptic contacts, which were thought to exist on the basis of CF-LSM findings, were confirmed with FIB-SEM, revealing the usefulness of the combined method of CF-LSM and FIB-SEM. © The Author 2014. Published by Oxford University Press on behalf of The Japanese Society of Microscopy. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

  18. Evaluation of the Cell Proliferation Process of Ovarian Follicles in Hypothyroid Rats by Proliferation Cell Nuclear Antigen Immunohistochemical Technique

    Directory of Open Access Journals (Sweden)

    M. Moghaddam Dorafshani

    2012-10-01

    Full Text Available Introduction & Objective: The normal females reproductive function , needs hypothalamus-hypophysis-ovarian extensive hormonal messages. Primary hypothyroidism is characterized by reduced production and secretion of thyroid hormones. During follicular growth PCNA (Proliferating Cell Nuclear Antigen and cycklin D complex play an important role in regulating cell proliferation .This study aimed to determine the cell proliferation index and how this process changes induced by thyroid hormone decreased in rat ovarian follicles.Materials & Methods: In this experimental study, 20 Wistar female rats were divided into experimental and control groups. Experimental group was chemically thyroidectomized by administering propylthiouracil (PTU (500 mg per liter of drinking water. The control group received normal drinking water. After three weeks rats were killed and their ovaries dissected and fixed for the histological preparation. Cell proliferation was determined by PCNA and stereological methods were used for counting cells.Results: Cell proliferation index showed a significant decrease in the frequency of follicular growth from prenatal to graafian follicles in hypothyroidism groups(P0.05 . PCNA expression determined that Primary follicle growth begins earlier. Positive PCNA cells were not observed in primordial follicles of the groups.Conclusion: According to the results of our study, this hypothesis is raised that granulosa cells in growing follicles may be increased by follicle adjacent cells in ovarian stroma . Hormonal changes following the reduction of thyroid hormones may greatly affect the cell proliferation index and lead to faster follicle degeneration.(Sci J Hamadan Univ Med Sci 2012; 19 (3:5-15

  19. Immunoelectron Microscopic Localization of MHC Class 1 and 2 Antigens on Bile Duct Epithelial Cells in Patients with Primary Biliary Cirrhosis

    OpenAIRE

    Nishimoto, Hiroshi; Yamada, Gotaro; Mizuno, Motowo; Tsuji, Takao

    1994-01-01

    We studied the distribution of class 1 and class 2 major histocompatibility complex (MHC) antigens on bile duct epithelial cells in liver from patients with primary biliary cirrhosis (PBC) by an immunohistochemical method using monoclonal antibodies to HLA-ABC products and HLA-D subregion products (HLA-DR, -DP, -DQ). By light microscopy, the expression of MHC class 1 antigens (HLA-ABC antigens) was enhanced in PBC compared with controls. While negligible staining of MHC class 2 antigens was d...

  20. Hidradenocarcinoma: a histological and immunohistochemical study.

    Science.gov (United States)

    Ko, Christine J; Cochran, Alistair J; Eng, William; Binder, Scott W

    2006-11-01

    The diagnosis of hidradenocarcinoma is difficult due to a combination of factors including inconsistent nomenclature/ classification, rarity of the neoplasm, and variable morphology of cells composing the neoplasm. Immunohistochemistry has not been previously performed on a series of hidradenocarcinomas. We evaluated six cases of hidradenocarcinoma histologically and immunohistochemically using antibodies to gross cystic disease fluid protein-15 (GCDFP-15), carcino-embryonic antigen (CEA), epithelial membrane antigen (EMA), S-100 protein, keratin AE1/3, cytokeratin 5/6, p53, bcl-1, bcl-2, and Ki67. Histology suggested concurrent eccrine and apocrine differentiation of the cases. Ki67 and p53 staining was strongly positive in five of six tumors. The neoplasms stained with antibodies to CEA, S-100 protein, GCDFP-15, EMA, bcl-1, and bcl-2 in no consistent pattern. All tumors studied stained positively for keratin AE1/3 and cytokeratin 5/6. In making the diagnosis of hidradenocarcinoma, it may be unnecessary to separate hidradenocarcinoma into eccrine and apocrine categories, and although Ki67 and p53 may be helpful, histological parameters remain paramount.

  1. Immunohistochemical expression of protein 53, murine double minute 2, B-cell lymphoma 2, and proliferating cell nuclear antigen in odontogenic cysts and keratocystic odontogenic tumor

    Directory of Open Access Journals (Sweden)

    Hébel Cavalcanti Galvão

    2013-01-01

    Full Text Available Introduction: Even though odontogenic cysts share a similar histogenesis, they show different growth and differentiation profile due to differences in the proliferative cellular activity. Aims: We perform an immunohistochemical assessment of protein 53 (p53, proliferating cell nuclear antigen (PCNA, B-cell lymphoma 2 (bcl-2, and murine double minute 2 (MDM2 expression in odontogenic cysts and keratocystic odontogenic tumor analyzing their correlation with the biological behavior of these lesions. Materials and Methods: By the streptavidin-biotin-peroxidase method with antibodies against p53, PCNA, bcl-2, and MDM2 proteins, 11 radicular cysts, 11 dentigerous cysts, and 11 keratocystic odontogenic tumor were analyzed. The non-parametric Mann-Whitney U-test and Kruskall-Wallis test (P ≤ 0.05 were used to analyze the data. Results: Immunopositivity for PCNA was observed in all cases appraised, predominantly in the suprabasal layer of keratocystic odontogenic tumor epithelial lining (SD ± 19.44, but no significant differences were found among the groups of lesions. Bcl-2 immunoexpression was observed especially in the basal layer of keratocystic odontogenic tumor. PCNA LI was significantly higher than bcl-2 LI in keratocystic odontogenic tumor. MDM2 and p53 immunoexpression were not detected in the lesions studied. Among the evaluated lesions, the keratocystic odontogenic tumor showed different immunoexpression of the proliferation and apoptosis markers. Conclusion: The results of this study suggest that the keratocystic odontogenic tumor presents distinct biological behavior of the odontogenic cysts, as for the processes of proliferation, apoptosis, and differentiation, reinforcing the information in favor of the neoplastic nature of this lesion.

  2. Urinary bladder lesions after the chernobyl accident. Immunohistochemical assessment of p53, proliferating cell nuclear antigen, cyclin D1 and p21[sup WAF1/Cip1

    Energy Technology Data Exchange (ETDEWEB)

    Romanenko, A.; Zaparin, W.; Vinnichenko, W.; Vozianov, A. (Academy of Medical Sciences of Ukraine, Kiev (Ukraine)); Lee, C.C.R.; Yamamoto, Shinji; Hori, Taka-aki; Wanibuchi, Hideki; Fukushima, Shoji

    1999-02-01

    During the 11-year period subsequent to the Chernobyl accident, the incidence of urinary bladder cancer in Ukraine has increased from 26.2 to 36.1 per 100,000 population. Cesium-137 ([sup 137]Cs) accounts for 80-90% of the incorporated radioactivity in this population, which has been exposed to long-term, low-dose ionizing radiation, and 80% of the more labile pool of cesium is excreted via the urine. The present study was performed to evaluate the histopathological features and the immunohistochemical status of p53, p21[sup WAF1/Cip1], cyclin D1 and PCNA (proliferating cell nuclear antigen) in urinary bladder mucosa of 55 males (49-92 years old) with benign prostatic hyperplasia who underwent surgery in Kiev, Ukraine, in 1995 and 1996. Group I (28 patients) inhabiting radiocontaminated areas of the country, group II (17 patients) from Kiev city with less radiocontamination and a control group III (10 patients) living in so-called ''clean'' areas of Ukraine were compared. In groups I and II, an increase in multiple areas of moderate or severe dysplasia or carcinoma in situ was seen in 42 (93%) of 45 cases. In addition, two small transitional cell carcinomas were found in one patient in each of groups I and II. Nuclear accumulation of p53, PCNA, cyclin D1, and to a lesser extent p21[sup WAF1/Cip1], was significantly increased in both groups I and II as compared with the control group III, indicating possible transformation events or enhancement of repair activities, that may precede the defect in the regulatory pathway itself, at least in the G1 phase of the cell cycle. Our results suggest that early malignant transformation is taking place in the bladder urothelium of people in the radiocontaminated areas of Ukraine and that this could possibly lead sometime in the future to an increased incidence of urinary bladder cancer. (author)

  3. Immunohistochemical localization of androgen receptor in rat caput epididymis during postnatal development

    Directory of Open Access Journals (Sweden)

    Sema Timurkaan

    2011-09-01

    Full Text Available Objectives: The aim of this study was to investigate the developmental pattern of androgen receptor (AR in caput epididymis.Materials and methods: In this study three randomly selected rats were sacrificed at ages 21, 56, 90 and 120 days old. All male rats were anesthetized with ethyl ether before killing. Then, the caput epididymides were removed and fixed in Bouin’s fixative at +4°C for 36 hour. Afterwards the tissue samples were embedded in paraffin for routine histological methods. Later the tissues were sectioned at 5μm and mounted on poly-L-lysin-coated slides. To solve the antigen masking problem, we performed microwave stimulated antigen retrieval technique before the immunohistochemical staining. Avidin-Biotin-Peroxidase Complex (ABC method was applied for immunohistochemical staining.Results: In all age groups of rats studied, positive immunohistochemical staining for the AR appeared in nuclei of epididymal cells. The staining intensity of AR positive cells did not change depending on age. In caput epididymis, immunostainable AR was found in tubular epithelial cells (principal cells, basal cells and apical cells and peritubular smooth muscle cells. The AR staining in the epithelial cells appeared to be stronger than in the peritubular smooth muscle cells. In the epithelial cells; staining intensity was stronger in principal cells than in basal cells and apical cells.Conclusion: Staining intensity of AR positive epididymal cells irrespective of age indicated the necessity of androgens for postnatal differentiation and maintaining the structure of the epididymis. Stronger staining intensity in principal cells suggested that principal cells are more sensitive to androgen stimulation. J Clin Exp Invest 2011; 2 (3: 260-266.

  4. Spatial distribution of "tissue-specific" antigens in the developing human heart and skeletal muscle. I. An immunohistochemical analysis of creatine kinase isoenzyme expression patterns

    NARCIS (Netherlands)

    Wessels, A.; Vermeulen, J. L.; Virágh, S.; Kálmán, F.; Morris, G. E.; Man, N. T.; Lamers, W. H.; Moorman, A. F.

    1990-01-01

    Using monoclonal antibodies against the M and B subunit isoforms of creatine kinase (CK) we have investigated their distribution in developing human skeletal and cardiac muscle immunohistochemically. It is demonstrated that in skeletal muscle, a switch from CK-B to CK-M takes place around the week 8

  5. Immunohistochemical detection of PGL-1, LAM, 30 kD and 65 kD antigens in leprosy infected paraffin preserved skin and nerve sections

    NARCIS (Netherlands)

    van den Bos, I. C.; Khanolkar-Young, S.; Das, P. K.; Lockwood, D. N.

    1999-01-01

    A panel of lipid, carbohydrate and protein antibodies were optimized for use in detecting M. leprae antigens in paraffin embedded material. Skin and nerve biopsies from 13 patients across the leprosy spectrum were studied. All antibodies detected antigen in tissues with a BI > 1. Phenolic-glycolipid

  6. Occurrence and significance of Mallory bodies in morbidly obese patients. An immunohistochemical study

    DEFF Research Database (Denmark)

    Gluud, C; Christoffersen, Pernille Yde; Andersen, T

    1984-01-01

    Liver biopsies from 61 consecutive patients with morbid obesity (less than 60% overweight) and from 48 patients with alcoholic liver disease were examined for the presence of Mallory bodies. For the detection both routine haematoxylin and eosin stained sections and sections exposed...... liver disease. Using the immunohistochemical technique, Mallory bodies were found in the liver of 2 obese patients (3%) and in 36 patients with alcoholic liver disease (75%). None of the Mallory body positive obese patients showed signs of diabetes mellitus, cholestasis or hypocholesterolemia, but both...... to an immunohistochemical technique were employed. The latter uses an antiserum which recognizes antigenic determinants in Mallory bodies. Using haematoxylin and eosin staining. Mallory bodies were not detected in any of the biopsies from the obese patients, but found to be present in 63% of the patients with alcoholic...

  7. Basal Cell Adenoma‑Clinicopathological, Immunohistochemical ...

    African Journals Online (AJOL)

    Pan CK, CK 5/6 showed strong immunoreactivity, calponin showed moderate staining, p63 and Ki‑67 mild staining, whereas CD 117 and SMA showed negative immunostaining. Conclusion: Vigilant comprehensive analysis of all the pertaining clinicopathologic and histopathologic features and immunohistochemical ...

  8. Immunohistochemical analysis of LNT, NeuAc2----3LNT, and Lex carbohydrate antigens in human tumors and normal tissues.

    OpenAIRE

    Garin-Chesa, P.; Rettig, W. J.

    1989-01-01

    Monoclonal antibodies (MAbs) K21 and K4 define two carbohydrate determinants, lacto-N-tetraose (LNT) and sialylated LNT (NeuAc2----3LNT). respectively, which are expressed on the surface of cultured human teratocarcinoma cells, but not on a wide range of other epithelial and nonepithelial cells in culture. The present study used immunohistochemical methods to examine LNT and NeuAc2----3LNT expression in normal human tissues, 29 germ cell tumors, and over 200 tumors of other histologic types. ...

  9. Immunohistochemical detection of VHS virus in paraffin-embedded specimens of rainbow trout (Oncorhynchus mykiss); The influence of primary antibody, fixative, and antigen unmasking on method sensitivity

    DEFF Research Database (Denmark)

    Evensen, O.; Olesen, Niels Jørgen

    1997-01-01

    The influence of the primary antibody, the fixative, and the antigen unmasking technique on the method sensitivity of immunohistochemistry as a method for the identification of viral hemorrhagic septicemia (VHS) virus in paraffin-embedded specimens of naturally infected rainbow trout (Oncorhynchus...... performed on parallel specimens, and the virus titer (TCID50/ml) was determined. Purified nucleocapsid protein (N-protein) of the virus was incorporated in an artificial antigen substrate (polymerized bovine serum albumin), fixed as described above, and embedded in paraffin wax. Microwave unmasking...

  10. Fetal antigen 2 in primary and secondary brain tumors

    DEFF Research Database (Denmark)

    Rasmussen, H Boje; Teisner, B; Schrøder, H D

    1991-01-01

    Immunohistochemical deposition and distribution of fetal antigen 2 (FA2) was examined in normal brain tissue and in primary and metastatic tumors of the brain. In normal brain tissue FA2 was exclusively found linearly around the vessels, along pia and in arachnoidea. A similar localization was seen...... in primary brain tumors except in gliosarcoma where FA2 was distributed diffusely in the sarcoma region and was absent in the glioma region. In metastatic carcinoma with tumor stroma a diffuse staining reaction was seen in the stroma and with a basement membrane (BM) like staining at the tumor cell....../stroma interface. Intracytoplasmic FA2 staining of the tumor cells was seen in areas without tumor stroma. In metastatic melanoma a BM like FA2 staining was seen around and between individual tumor cells. The staining patterns seen in the metastatic tumors were in accordance with that of the corresponding primary...

  11. Fetal antigen 1, an EGF multidomain protein in the sex hormone-producing cells of the gonads and the microenvironment of germ cells

    DEFF Research Database (Denmark)

    Jensen, Charlotte Harken; Erb, K; Westergaard, L G

    1999-01-01

    Fetal antigen 1 (FA1), an epidermal growth factor (EGF) multidomain glycoprotein, was investigated in the human reproductive system. Immunohistochemical analysis of the male reproductive system revealed staining for FA1 in the Leydig cells only. Concentrations of FA1 in seminal plasma and serum w...

  12. Immunohistochemical study of p53 overexpression in radiation-induced colon cancers

    International Nuclear Information System (INIS)

    Minami, Kazunori; Hayashi, Nobuyuki; Mokarim, A.; Matsuzaki, Sumihiro; Ito, Masahiro; Sekine, Ichiro.

    1998-01-01

    The expressions of p53 and proliferating cell nuclear antigen (PCNA) were studied immunohistochemically from paraffin sections of 7 cases (9 lesions) of radiation-induced colon cancer and 42 cases of spontaneous colon cancer. Age distribution of radiation-induced and spontaneous colon cancer were 68.1 years (range, 56 to 77 years) and 67.4 years (range, 31 to 85 years), respectively. Among the radiation-induced colon cancers, there were 3 lesions of mucinous carcinoma (33%), a much higher than found for spontaneous mucinous cancer. Immunohistochemically, p53 protein expression was detected in 7/9 (78%) of radiation-induced cancers and in 23/42 (55%) of spontaneous colon cancers. χ 2 analysis found no significant differences between radiation-induced and spontaneous colon cancers in age distribution or p53-positive staining for frequency, histopathology, or Dukes'' classification. In radiation colitis around the cancers including aberrant crypts, spotted p53 staining and abnormal and scattered PCNA-positive staining were observed. In histologically normal cells, p53 staining was almost absent and PCNA-positive staining was regularly observed in the lower half of the crypt. In radiation colitis including aberrant glands, cellular proliferation increased and spotted p53 expression was observed. This study suggests that radiation colitis and aberrant glands might possess malignant potential and deeply associate with carcinogenesis of radiation-induced colon cancer. (author)

  13. Gram staining.

    Science.gov (United States)

    Coico, Richard

    2005-10-01

    Named after Hans Christian Gram who developed the method in 1884, the Gram stain allows one to distinguish between Gram-positive and Gram-negative bacteria on the basis of differential staining with a crystal violet-iodine complex and a safranin counterstain. The cell walls of Gram-positive organisms retain this complex after treatment with alcohol and appear purple, whereas gram-negative organisms decolorize following such treatment and appear pink. The method described here is useful for assessing bacterial contamination of tissue culture samples or for examining the Gram stain status and morphological features of bacteria isolated from mixed or isolated bacterial cultures.

  14. Relation between Carcinoembryonic Antigen Levels in Colon Cancer Tissue and Serum Carcinoembryonic Antigen Levels at Initial Surgery and Recurrence.

    Science.gov (United States)

    Saito, Gota; Sadahiro, Sotaro; Okada, Kazutake; Tanaka, Akira; Suzuki, Toshiyuki; Kamijo, Akemi

    2016-01-01

    Carcinoembryonic antigen (CEA) is widely used for postoperative surveillance of colon cancer. Even if serum CEA is negative at initial surgery, it may turn positive at recurrence. We investigated the relation between serum CEA levels and the immunohistochemical staining status of CEA in the primary and resected metastatic tissues. Out of 224 patients with recurrent colon cancer between 1998 and 2012, we studied 46 patients in whom serum CEA levels were measured and immunohistochemical staining for CEA was possible in the primary and metastatic tissues. The positive rate of serum CEA did not differ between initial surgery and recurrence, regardless of whether the cutoff value was set at 5 or 10 ng/ml (p = 0.829, p = 0.671). There was no relation between the CEA staining status and serum CEA level at initial surgery. However, the CEA staining status of metastatic tissue was significantly related to the serum CEA level at recurrence (p = 0.0046 and p = 0.0026). The immunohistochemical staining status of CEA in metastatic tissue is closely related to the serum CEA level. This finding suggests that serum CEA levels are influenced not only by the CEA production capacity of cancer cells but also by the ability of the surrounding tissue to release CEA into the blood. © 2016 The Author(s) Published by S. Karger AG, Basel.

  15. Quantitative immunohistochemical assessment of IgA, IgM, IgG and antigen-specific immunoglobulin secreting plasma cells in pig small intestinal lamina propria.

    Science.gov (United States)

    Bianco, C; Felice, V; Panarese, S; Marrocco, R; Ostanello, F; Brunetti, B; Muscatello, L V; Leotti, G; Vila, T; Joisel, F; Sarli, G

    2014-08-15

    Intestinal immune response plays an important defensive role for pathogens, particularly for those transmitted by the oro-faecal route or for foecal shedding modulation. This work examined three parts of intestine from twelve gilts experimentally infected with PCV2-spiked semen, six vaccinated (V group) and six unvaccinated (NV group) against PCV2, 29 and 53 days post infection (DPI). An immunohistochemical investigation for IgA-, IgG- and IgM-antibody bearing plasma cells (PCs) was run on intestinal samples coupled with a sandwich immunohistochemical method to reveal anti-PCV2 antibody-secreting PCs. Plasma cell density was compared in the two groups of animals at 29 and 53 DPI. The IgA, IgG and IgM PC density did not differ between groups but displayed an increase from the upper (villus) to the lower part of the crypts while a decreasing trend in PC density was identified from duodenum to ileum. In the NV group, no increase in anti-PCV2 PC density was demonstrable in the two sampling moment: the amounts of lamina propria PCV2-specific antibody-producing PCs remained constant, 10.55 ± 4.24 and 10.06 ± 5.01 at 29 DPI and 53 DPI, respectively. In the V group a significant increase in PCV2-specific antibody-producing PCs was observed over time. The amounts of PCV2-specific antibody-producing PCs increased from 9.37 ± 13.36 at 29 DPI to 18.76 ± 15.83 at 53 DPI. The data on IgA, IgM and IgG PC counts can be considered reference values in a population of adult pigs. The sandwich method can be proposed as a technique able to identify specific antibody-secreting PCs in formalin-fixed paraffin-embedded tissues. A practical application of the sandwich method is the demonstration of a "booster-like" response of the lamina propria in vaccinated compared to unvaccinated animals. After virus challenge, vaccination induced an increase in the number of PCs containing specific anti-PCV2 antibodies at the level of intestinal mucosa. Copyright © 2014 Elsevier B.V. All rights

  16. Pyogenic granuloma appearing on port-wine stain: a case report.

    Science.gov (United States)

    Askar, I; Kilinc, N; Yucetas, A

    2003-01-01

    Pyogenic granuloma has been reported to be associated with hemangiomas and hamartomas, including port-wine stain. It has been suggested that the spontaneous development of pyogenic granuloma in port-wine stain might be associated with microscopic arteriovenous anastomoses in highly vascularized areas such as the fingers, hands, lips, tongue and face. A 25-year-old male patient presented with a history of a reddish, solitary nodule on the posterior cervical area for eight months. There had been an associated port-wine stain at the same localization since birth. Physical examination revealed a solitary, strawberry-like dome-shaped papule, 12 mm in diameter, within a well-demarcated reddish colored surrounding patch which had been present on the posterior cervical area. The lesion was excised, considering pyogenic granuloma arising in a port-wine stain. Histopathologic examination showed a mass of capillaries with variable luminal diameters, infiltration of inflammatory cells, and immature endothelial proliferation in the upper dermis. The capillaries were organized into lobules separated by fibrous stroma and were surrounded by an epithelial collarette. Immunohistochemical staining for factor VIII-related antigen supported all these findings of the port-wine stain. We present a pyogenic granuloma arising in port-wine stain on the posterior cervical area, since the posterior cervical area is not as highly vascular as the fingers, hands, lips, tongue and face. We believed that the collar of the patient's shirt continuously traumatized port-wine stain, and consequently led to the development of pyogenic granuloma.

  17. A new antigen retrieval technique for human brain tissue.

    Science.gov (United States)

    Alelú-Paz, Raúl; Iturrieta-Zuazo, Ignacio; Byne, William; Haroutunian, Vahram; García-Villanueva, Mercedes; Rábano, Alberto; García-Amado, María; Prensa, Lucía; Giménez-Amaya, José Manuel

    2008-01-01

    Immunohistochemical staining of tissues is a powerful tool used to delineate the presence or absence of an antigen. During the last 30 years, antigen visualization in human brain tissue has been significantly limited by the masking effect of fixatives. In the present study, we have used a new method for antigen retrieval in formalin-fixed human brain tissue and examined the effectiveness of this protocol to reveal masked antigens in tissues with both short and long formalin fixation times. This new method, which is based on the use of citraconic acid, has not been previously utilized in brain tissue although it has been employed in various other tissues such as tonsil, ovary, skin, lymph node, stomach, breast, colon, lung and thymus. Thus, we reported here a novel method to carry out immunohistochemical studies in free-floating human brain sections. Since fixation of brain tissue specimens in formaldehyde is a commonly method used in brain banks, this new antigen retrieval method could facilitate immunohistochemical studies of brains with prolonged formalin fixation times.

  18. Novel fusion proteins for the antigen-specific staining and elimination of B cell receptor-positive cell populations demonstrated by a tetanus toxoid fragment C (TTC) model antigen.

    Science.gov (United States)

    Klose, Diana; Saunders, Ute; Barth, Stefan; Fischer, Rainer; Jacobi, Annett Marita; Nachreiner, Thomas

    2016-02-17

    In an earlier study we developed a unique strategy allowing us to specifically eliminate antigen-specific murine B cells via their distinct B cell receptors using a new class of fusion proteins. In the present work we elaborated our idea to demonstrate the feasibility of specifically addressing and eliminating human memory B cells. The present study reveals efficient adaptation of the general approach to selectively target and eradicate human memory B cells. In order to demonstrate the feasibility we engineered a fusion protein following the principle of recombinant immunotoxins by combining a model antigen (tetanus toxoid fragment C, TTC) for B cell receptor targeting and a truncated version of Pseudomonas aeruginosa exotoxin A (ETA') to induce apoptosis after cellular uptake. The TTC-ETA' fusion protein not only selectively bound to a TTC-reactive murine B cell hybridoma cell line in vitro but also to freshly isolated human memory B cells from immunized donors ex vivo. Specific toxicity was confirmed on an antigen-specific population of human CD27(+) memory B cells. This protein engineering strategy can be used as a generalized platform approach for the construction of therapeutic fusion proteins with disease-relevant antigens as B cell receptor-binding domains, offering a promising approach for the specific depletion of autoreactive B-lymphocytes in B cell-driven autoimmune diseases.

  19. [Application of Immunohistochemistry and Immunofluorescence Staining in Detection of Phospholipase A2 Receptor on Paraffin Section of Renal Biopsy Tissue].

    Science.gov (United States)

    Dong, Hong-rui; Wang, Yan-yan; Wang, Guo-qin; Sun, Li-jun; Cheng, Hong; Chen, Yi-pu

    2015-10-01

    To evaluate the application of immunohistochemistry and fluorescence staining method in the detection of phospholipase A2 receptor (PLA2R) on paraffin section of renal biopsy tissue,and to find an accurate and fast method for the detection of PLA2R in renal tissue. The PLA2R of 193 cases were detected by immunohistochemical staining,and the antigen was repaired by the method of high pressure cooker (HPC) hot repair plus trypsin repair. The 193 samples including 139 cases of idiopathic membranous nephropathy (IMN), 15 cases of membranous lupus nephritis, 8 cases of hepatitis B virus associated membranous nephropathy, 18 cases of IgA nephropathy, and 13 cases of minimal change diseases. To compare the dyeing effects, 22 paraffin sections of renal biopsy tissue of IMN cases with positive PLA2R were stained by using 4 different. of antigen repairing,which included HPC hot repair, HPC hot repair plus trypsin repair, water bath heat repair, and water bath heat repair plus trypsin repair. To compare the dyeing effects, 15 paraffin sections of renal biopsy tissue of IMN cases with positive PLA2R were stained by using 3 different. of antigen repairing,which included water bath heat repair plus trypsin repair, protease K digestion repair, and pepsin digestion repair. In 193 cases, the positive rate of PLA2R in IMN cases was 90.6% (126/139), and the other 54 patients without IMN were negative. Twenty-two IMN patients were positive for PLA2R by using the HPC heat repair plus trypsin repaire or the water bath heat repair plus trypsin repair;while only a few cases of 22 IMN cases were positive by using the HPC hot repair alone or water bath heat repair alone. Fifteen IMN patients were positive for PLA2R by using water bath heat repair plus trypsin repair,protease K digestion repair,and pepsin digestion repair, but the distribution of positive deposits and the background were different. PLA2R immunohistochemical staining can effectively identify IMN and secondary MN. For

  20. Polymorphous low-grade adenocarcinoma of minor salivary gland. A comparative histologic and immunohistochemical study.

    Science.gov (United States)

    Regezi, J A; Zarbo, R J; Stewart, J C; Courtney, R M

    1991-04-01

    Sixteen polymorphous low-grade adenocarcinomas were reviewed and compared with 17 adenoid cystic carcinomas and with 21 other histologically similar minor salivary gland neoplasms. The polymorphous low-grade adenocarcinomas were for the most part distinctive in their microscopic appearance. Typically they exhibited infiltrative growth by small uniform cells in single-layered ducts. A syncytium of tumor cells was also characteristic, although solid and cribriform patterns were seen, making definitive diagnosis difficult with some tumors. Immunohistochemical staining for S-100 protein, glial fibrillary acidic protein, actin, vimentin, and keratins resulted in relatively distinctive antigenic profiles for the tumors studied. Of significance was strong S-100 protein and weak actin staining of polymorphous low-grade adenocarcinomas, moderate actin staining of adenoid cystic carcinomas, moderate glial fibrillary acidic protein staining of monomorphic adenomas and pleomorphic adenomas, and nonreactivity of monomorphic adenomas for vimentin. It is believed that the immunoprofiles could be useful in the microscopic diagnosis of salivary gland tumors. The identification of antigens found normally in myoepithelial and epithelial cells supports the concept that these tumors are derived from pluripotential reserve cells.

  1. Evaluation of cell proliferative activity after irradiation using immunohistochemical approach and flow cytometry

    Energy Technology Data Exchange (ETDEWEB)

    Tamada, Takashi (Okayama Univ. (Japan). School of Medicine)

    1992-06-01

    To evaluate a proliferative activity of post-irradiated malignant cells, we studied the kinetics of HeLa cells using immunohistochemical approach and flow cytometry. HeLa cells were stained with two proliferation-associated monoclonal antibodies, Ki-67 and anti-DNA polymerase {alpha} antibody. Nucleoli of non-irradiated cells were granularly stained with Ki-67. After irradiation, only the center of nuclei was diffusely stained with Ki-67. One hundred forty-four hours after low-dose irradiation, the staining patterns became the same as the control. On the other hand, after high-dose irradiation, the center of nuclei was weakly stained. DNA polymerase {alpha} was diffusely labelled with nuclei of the control. It was located around the border of nuclei of low-dose irradiated cells like a ring. But after high-dose irradiation, it was granularly distributed in the periphery of nuclei. FITC conjugated Ki-67/PI two parameter analysis was done by a single laser flow cytometer. Twenty-four hours after irradiation, DNA-histograms showed the accumulation to G{sub 2}/M phase and the increase of DNA content of G{sub 2}/M cells, as exposure dose was increased. Two parameter analysis showed the increase of FITC uptake of G{sub 2}/M phase as dose increased. These changes of flow cytometry were remarkably observed after 24 hours' incubation. It was shown that the difference of Ki-67 antigen and DNA polymerase {alpha} appearance depended on the irradiation dose. These findings suggest that immunohistochemical staining with Ki-67 or anti-DNA polymerase {alpha} antibody and flow cytometry using Ki-67 are available to evaluate cell damages after irradiation. (author).

  2. Detection of avian influenza virus H5N1 subtype in organs of chicken affected by higly pathogenic avian infuenza in East and West Java by using immunohistochemical technique

    Directory of Open Access Journals (Sweden)

    R Damayanti

    2004-10-01

    Full Text Available The study was conducted to detect antigen H5N1 of highly pathogenic Avian Influenza (HPAI virus in various farms in East and West Java. The immunohistochemical technique was applied due to Hematoxilin-eosin (H&E staining was impossible to visualize the antigen in tissue. Immunohistochemical staining was applied for some visceral organs collected from the areas where the outbreaks occurred in September-October 2003. The specimens were processed as histopathological paraffin blocks using standard method. The blocks that were suspected to have antigen H5N1 were cut and rabbit antisera to H5N1 produced from the local isolate was applied as the primary antibody. Biotinylated secondary antibody and avidin biotin peroxidase from a commercial kit were administered. The antigen present in the tissues were visualized by adding a substrate called Amino Ethyl Carbazole (AEC resulting in reddish brown colour. This immunostaining proved to be accurate and reliably quick method to detect H5N1 antigen present in the avian tissues. In conclusion, the outbreak of bird flu was caused by H5N1 strain and the antigen could be found in wattles, combs, brain, trachea, lungs, heart, proventriculus, liver, spleen, kidney and ovary.

  3. Immunohistochemical Characterization of Canine Lymphomas

    Directory of Open Access Journals (Sweden)

    Roxana CORA

    2017-11-01

    Full Text Available Lymphomas occur by clonal expansion of lymphoid cells and have distinctive morphological and immunophenotypic features. Determination of canine lymphoma immunophenotype is useful for accurate prognosis and further therapy. In the suggested study, we performed an immunohistochemical evaluation of some cases with canine lymphoma diagnosed in the Department of Pathology (Faculty of Veterinary Medicine, Cluj-Napoca, Romania, in order to characterize them. The investigation included 39 dogs diagnosed with different anatomical forms of lymphoma, following necropsy analysis or assessment of biopsies. The diagnosis of lymphoma was confirmed by necropsy and histopathology (Hematoxylin-eosin stain examinations. The collected specimens were analyzed by immunohistochemistry technique (automatic method using the following antibodies: CD3, CD20, CD21 and CD79a. The analyzed neoplasms were characterized as follows: about 64.10% of cases were diagnosed as B-cell lymphomas, 33.34% of cases as T-cell lymphomas, whereas 2.56% of cases were null cell type lymphomas (neither B nor T. Most of multicentric (80%, mediastinal (60% and primary central nervous system lymphomas (100% had B immunophenotype, while the majority of cutaneous (80% and digestive (100% lymphomas had T immunophenotype. Immunohistochemical description of canine lymphomas can deliver some major details concerning their behavior and malignancy. Additionally, vital prognosis and efficacy of some therapeutic protocols are relying on the immunohistochemical features of canine lymphoma.

  4. Lectin binding patterns and immunohistochemical antigen detection ...

    African Journals Online (AJOL)

    Ibrahim Eldaghayes

    2018-02-09

    Feb 9, 2018 ... María Andrea Fiorentino1,*, Fernando Alberto Paolicchi1, Carlos Manuel Campero1 and Claudio G. Barbeito2. 1INTA, Centro Regional Buenos Aires Sur, Estación Experimental Agropecuaria Balcarce, 7620 Balcarce,. Argentina. 2Cátedra de Histología y Embriología e Instituto de Patología, Facultad de ...

  5. Polymorphous Sweat Gland Carcinoma: An Immunohistochemical and Molecular Study.

    Science.gov (United States)

    Ronen, Shira; Aguilera-Barrantes, Irene; Giorgadze, Tamara; Šteiner, Petr; Grossmann, Petr; Suster, Saul

    2018-03-06

    Polymorphous sweat gland carcinoma is an uncommon low-grade malignant adnexal tumor with a marked predilection for the distal extremities. Histologically, the lesions are characterized by a cellular proliferation showing a combination of growth patterns, including trabecular, solid, tubular, cribriform, or adenoid cystic and pseudopapillary. The immunohistochemical and molecular profile of these tumors has not yet been properly addressed. We have studied 3 cases of polymorphous sweat gland carcinoma using a broad panel of immunohistochemical markers including cytokeratin AE1/AE3, CK5/6, MOC31, p40, p63, p16, chromogranin, synaptophysin, CD56, MIB-1, estrogen receptor, progesterone receptor, androgen receptor, BER-EP4, smooth muscle actin, epithelial membrane antigen, carcinoembryonic antigen, CD117, S100 protein, HBME-1, DOG1, vimentin, and mammaglobin. We also examined for the MYB-NFIB fusion by fluorescent in situ hybridization (ISH) and for human papilloma virus by ISH. Our studies show that cytokeratin AE1/AE3, CK5/6, p40, p63, p16, chromogranin, and CD56 stains were positive in all 3 cases. All 3 cases were negative for MYB-NFIB fusion by fluorescent ISH which rules out adenoid cystic carcinoma. DNA ISH studies for high-risk human papilloma virus were negative in all cases. MIB-1 proliferation index was very high (30%-70% nuclear positivity), supporting a malignant phenotype. The positivity for chromogranin and CD56 suggests partial neuroendocrine differentiation. The differential diagnosis includes metastases from internal malignancies, basal cell carcinoma, and other benign and malignant adnexal neoplasms such as adenoid cystic carcinoma, ductal eccrine carcinoma, and microcystic carcinoma. Positivity for p16 in combination with chromogranin and CD56 may be potentially good markers for differentiating this tumor from other adnexal tumors.

  6. Pleural fluid Gram stain

    Science.gov (United States)

    Gram stain of pleural fluid ... mixing it with a violet stain (called a Gram stain). A laboratory specialist uses a microscope to ... reveals an abnormal collection of pleural fluid. The Gram stain can help identify the bacteria that might ...

  7. Immunohistochemical localization of human papilloma virus in conjunctival neoplasias: a retrospective study.

    Science.gov (United States)

    Sen, Seema; Sharma, Anjana; Panda, Anita

    2007-01-01

    The extent of association of human papilloma virus (HPV) in human conjunctival neoplasias has been debated in studies originating from different parts of the world, but no substantial evidence has been generated on Indian subjects. This prompted us to carry out a retrospective study on conjunctival neoplasias diagnosed over the past 12 years. Histopathological and immunohistochemical analysis of 65 specimens of ocular neoplasias and 30 normal controls diagnosed between 1991 and 2002 at a tertiary eye care hospital, was undertaken. Formalin-fixed, paraffin-embedded tissues were reviewed for confirming histopathological diagnosis, presence of koilocytosis and changes related to actinic keratosis. Immunohistochemical analysis was done using HPV-specific monoclonal antibodies. Clinicopathological correlation and the association of HPV antigen with the histopathological features were performed. Out of the 65 cases analyzed, 35 were papillomas and 30 were ocular surface squamous neoplasias (OSSN). The mean age was 48 years with a male preponderance. Histologically, koilocytosis was observed in 17.1% of papillomas and 36.6% of OSSN. Actinic keratosis was present in 33% of OSSN. Immunohistochemically 17.1% conjunctival papillomas stained positive for HPV antigen, all cases of OSSN were negative for HPV. There was no correlation between koilocytosis or actinic keratosis and the detection of HPV antigen. The association between HPV and conjunctival neoplasias is variable in different geographical areas and also depends on the methods of detection used. This study warrants the need for applying more advanced techniques at a molecular level to determine the possible etiology of HPV in conjunctival neoplasias among Asian-Indians.

  8. CD3 immunohistochemical staining in diagnosis of lymphocytic colitis

    DEFF Research Database (Denmark)

    Fiehn, Anne-Marie Kanstrup; Engel, Ulla; Holck, Susanne

    2016-01-01

    Microscopic colitis (MC) is a common cause of chronic watery diarrhea. Traditionally, MC encompasses the 2 subgroups lymphocytic colitis (LC) and collagenous colitis, but recently, an additional subgroup, MC incomplete, has been introduced. Distinguishing between the subgroups relies exclusively...

  9. Immunohistochemical detection of the latent nuclear antigen-1 of the human herpesvirus type 8 to differentiate cutaneous epidemic Kaposi sarcoma and its histological simulators Detecção imuno-histoquímica do antígeno nuclear latente-1 do herpesvirus tipo 8 para diferenciar o sarcoma de Kaposi epidêmico cutâneo de seus simuladores histológicos

    Directory of Open Access Journals (Sweden)

    Patricia Fonseca Pereira

    2013-04-01

    Full Text Available Kaposi's sarcoma is the most common neoplasia diagnosed in AIDS patients and the expression of the human herpesvirus-8 (HHV-8 latent nuclear antigen-1 has been useful for its histological diagnosis. The aim of this study is to confirm that immunohistochemistry is a valuable tool for differentiating KS from its simulators in skin biopsies of HIV patients. Immunohistochemical and histological analyses were performed in 49 Kaposi's sarcoma skin biopsies and 60 of its histological simulators. Positivity was present in the 49 Kaposi's sarcoma skin biopsies and no staining was observed in the 60 simulators analyzed, resulting in sensibility and specificity of 100%. HHV-8 immunohistochemical detection is an effective tool for diagnosing Kaposi's sarcoma, especially in early lesions in which neoplastic features are not evident. It also contributes to its histological differential diagnosis.O sarcoma de Kaposi é a neoplasia mais diagnosticada em pacientes com SIDA e a expressão do antígeno nuclear latente-1 do herpesvírus humano tipo-8 (HHV-8 tem se mostrado útil no seu diagnóstico histológico. O objetivo deste estudo é confirmar que o método imuno-histoquímico é uma ferramenta útil para diferenciar o sarcoma de Kaposi cutâneo de seus simuladores histológicos em pacientes HIV positivos. Análise histológica e imuno-histoquímica foram realizadas em 49 casos de sarcoma de Kaposi cutâneo e 60 casos de seus simuladores histológicos. Positividade à imuno-histoquímica para o antígeno nuclear latente 1 do HHV-8 foi observada nos 49 casos de sarcoma de Kaposi e nenhuma reação foi detectada nos 60 simuladores analisados, resultando em 100% de sensibilidade e especificidade. A detecção do HHV-8 por imuno-histoquímica é uma ferramenta útil para o diagnóstico de sarcoma de Kaposi, especialmente na lesão inicial cujo caráter neoplásico não é evidente, e contribui para seu diagnóstico diferencial histológico.

  10. Immunohistochemical detection of a unique protein within cells of snakes having inclusion body disease, a world-wide disease seen in members of the families Boidae and Pythonidae.

    Directory of Open Access Journals (Sweden)

    Li-Wen Chang

    Full Text Available Inclusion body disease (IBD is a worldwide disease in captive boa constrictors (boa constrictor and occasionally in other snakes of the families Boidae and Pythonidae. The exact causative agent(s and pathogenesis are not yet fully understood. Currently, diagnosis of IBD is based on the light microscopic identification of eosinophilic intracytoplasmic inclusion bodies in hematoxylin and eosin stained tissues or blood smears. An antigenically unique 68 KDa protein was identified within the IBD inclusion bodies, called IBD protein. A validated immuno-based ante-mortem diagnostic test is needed for screening snakes that are at risk of having IBD. In this study, despite difficulties in solubilizing semi-purified inclusion bodies, utilizing hybridoma technology a mouse anti-IBD protein monoclonal antibody (MAB was produced. The antigenic specificity of the antibody was confirmed and validated by western blots, enzyme-linked immunosorbent assay, immuno-transmission electron microscopy, and immunohistochemical staining. Paraffin embedded tissues of IBD positive and negative boa constrictors (n=94 collected from 1990 to 2011 were tested with immunohistochemical staining. In boa constrictors, the anti-IBDP MAB had a sensitivity of 83% and specificity of 100% in detecting IBD. The antibody also cross-reacted with IBD inclusion bodies in carpet pythons (Morelia spilota and a ball python (python regius. This validated antibody can serve as a tool for the development of ante-mortem immunodiagnostic tests for IBD.

  11. Indirect immunofluorescence staining of cultured neural cells.

    Science.gov (United States)

    Barbierato, Massimo; Argentini, Carla; Skaper, Stephen D

    2012-01-01

    Immunofluorescence is a technique allowing the visualization of a specific protein or antigen in cells or tissue sections by binding a specific antibody chemically conjugated with a fluorescent dye such as fluorescein isothiocyanate. There are two major types of immunofluorescence staining methods: (1) direct immunofluorescence staining in which the primary antibody is labeled with fluorescence dye and (2) indirect immunofluorescence staining in which a secondary antibody labeled with fluorochrome is used to recognize a primary antibody. This chapter describes procedures for the application of indirect immunofluorescence staining to neural cells in culture.

  12. Vascular expression of endothelial antigen PAL-E indicates absence of blood-ocular barriers in the normal eye.

    Science.gov (United States)

    Schlingemann, R O; Hofman, P; Anderson, L; Troost, D; van der Gaag, R

    1997-01-01

    The endothelium-specific antigen PAL-E is expressed in capillaries and veins throughout the body with the exception of the brain, where the antigen is absent from anatomical sites with a patent blood-brain barrier. In this study we determined vascular endothelial staining for PAL-E in the normal eye in relation to the ocular blood-tissue barriers. Immunohistochemical staining of frozen tissue sections of eyes from 22 cornea donors and a number of normal animal autopsy eyes was performed for the PAL-E antigen and the blood-brain barrier marker glucose transporter 1. In normal human and animal eyes, endothelial PAL-E staining was absent from the microvasculature in iris, ciliary muscle, optic nerve and retina. In a few normal human eyes, some weakly stained capillaries were observed in the retina and nerve fiber layer, mostly in the peripapillary area. Marked staining of capillaries and venules with PAL-E was observed in the conjunctiva, episclera, sclera, ciliary processes, choriocapillaris and optic nerve head. In general, the endothelial antigen PAL-E is absent from microvessels involved in the blood-ocular and the blood-retinal barriers. PAL-E may therefore be a useful marker to identify pathological breakdown of blood-ocular barriers.

  13. Merkel cell carcinoma with an unusual immunohistochemical profile

    Directory of Open Access Journals (Sweden)

    L. Pilloni

    2009-12-01

    Full Text Available The clinical and morphological picture of Merkel cell carcinoma (MCC may be rather challenging; therefore, the immunohistochemical profile plays a relevant role in confirming the microscopic diagnosis. A panel of antibodies including cytokeratins 20, 7 and epithelial membrane antigen, and neuronspecific enolase is used in confirming the morphological diagnosis of MCC. The majority of MCCs express CK20 and are CK7-negative. Herein, we present a case of primary cutaneous neuroendocrine carcinoma with an atypical immunohistochemical pattern. A 83-years old woman presented with a painless plaque, red to violaceous in colour, located in the leg. The skin tumor was excided, formalin-fixed and paraffinembedded. Tissue sections were immunostained with a panel of antibodies routinely utilized in complex primary skin tumors for evidencing epithelial and neuroendocrine differentiation of tumor cells. The neuroendocrine differentiation of tumor cells was evidenced by their immunoreactivity for synaptophysin, chromograninA and neuron-specific enolase. Tumor cells also showed diffuse cytoplasmic staining for CK7. No immunoreactivity was detected for CK20 and thyroid transcription factor-1. Our data, together with previous rare reports of CK20-/CK7+ MCCs, lay stress on the importance of routinely utilizing a panel of antibodies in the differential diagnosis of complex primary carcinomas of the skin and may have important implications in expanding the differential diagnosis of skin tumors. In particular, caution should be taken in excluding the diagnosis of MCC only on the basis of the absence of reactivity of tumor cells for CK20, favouring the wrong diagnosis of less aggressive skin tumors.

  14. Immunohistochemical analyses of a case of extralobar pulmonary sequestration with chest pain in an adult

    Directory of Open Access Journals (Sweden)

    Yuji Ohtsuki

    2013-01-01

    Full Text Available Computed tomography of a Japanese man in his mid-forties with a complaint of right-side chest pain showed a dome-shaped smooth-surfaced mediastinal mass, which was extirpated. The cut surface was highly hemorrhagic and necrotic and not related to the original pulmonary tissues. Although routine sectioning detected bronchial cartilage, immunohistochemical analyses clearly showed the presence of alveolar type II cells; only the alveolar type II cells located at the periphery of this mass showed positive staining for cytokeratins, thyroid transcription factor 1, surfactant protein A, epithelial membrane antigen and Krebs von den Lungen-6. Thus, these analyses are useful for the detection of pulmonary components, even in severely hemorrhagic and necrotic tissues with marked sequestration. The clinical diagnosis was a rare, adult type of extralobar pulmonary sequestration accompanied by chest pain.

  15. Differential staining of bacteria: gram stain.

    Science.gov (United States)

    Moyes, Rita B; Reynolds, Jackie; Breakwell, Donald P

    2009-11-01

    In 1884, Hans Christian Gram, a Danish doctor, developed a differential staining technique that is still the cornerstone of bacterial identification and taxonomic division. This multistep, sequential staining protocol separates bacteria into four groups based on cell morphology and cell wall structure: Gram-positive cocci, Gram-negative cocci, Gram-positive rods, and Gram-negative rods. The Gram stain is useful for assessing bacterial contamination of tissue culture samples or for examining the Gram stain status and morphological features of bacteria isolated from mixed or isolated bacterial cultures. (c) 2009 by John Wiley & Sons, Inc.

  16. Port-Wine Stains

    Science.gov (United States)

    ... Safe Videos for Educators Search English Español Port-Wine Stains KidsHealth / For Parents / Port-Wine Stains What's ... Manchas de vino de oporto What Are Port-Wine Stains? A port-wine stain is a type ...

  17. Oncocytic carcinoma of parotid gland: a case report with clinical, immunohistochemical and ultrastructural features

    Directory of Open Access Journals (Sweden)

    Giordano Giovanna

    2006-08-01

    Full Text Available Abstract Background Oncocytic carcinoma is an extremely rare neoplasm of the salivary glands. We report a case of oncocytic carcinoma arising in a parotid gland in a 66-year-old female. Method An excisional biopsy of the parotid tumor was performed. The specimen was submitted for histology and after fixation in formalin solution and inclusion in paraffin, 3–5 μm sections were stained with hematoxylin and eosin for conventional evaluation and Periodic acid Schiff stain. Immunohistochemical studies were performed using antibodies against mitochondrial antigen, keratin, S-100, alpha-actin, vimentin, alpha-1-antichymotrypsin as well as an ultrastructural analysis was performed. Results Frozen sections revealed an infiltrative growth pattern and the diagnosis of a malignant epithelial lesion was made. Permanent sections stained with haematoxylin and eosin revealed a neoplasm that had replaced a wide area of the parotid gland and had invaded subcutaneous adipose tissue. Perineural invasion was evident, but vascular invasion was not found. Neoplastic elements were large, round or polyhedral cells and were arranged in solid sheets, islands and cords. The cytoplasm was abundant, eosinophilic and finely granular. The nuclei were large and located centrally or peripherally. The nucleoli were distinct and large. Periodic acid Schiff stain demonstrated a granular cytoplasm. Immunohistochemistry demonstrated mithochondrial antigen, keratin, and chymotrypsin immunoreactivity in the neoplastic cells. Ultrastructural analysis revealed numerous mitochondria packed into the cytoplasm of the neoplastic cells. Thus, the final diagnosis was that of oncocytic carcinoma of parotid gland. Conclusion This neoplasm shows clinical, microscopical, histological and ultrastructural features of oncocytic carcinoma and this must be considered in the differential diagnosis of other proliferations in the parotid gland with abundant granular cytoplasm and metastatic oncocytic

  18. Combined beta-galactosidase and immunogold/silver staining for immunohistochemistry and DNA in situ hybridization

    NARCIS (Netherlands)

    van den Brink, W.; van der Loos, C.; Volkers, H.; Lauwen, R.; van den Berg, F.; Houthoff, H. J.; Das, P. K.

    1990-01-01

    A combination of beta-galactosidase enzyme and the immunogold/silver staining method was studied for evaluation of double-staining experiments. Applications are shown for immunohistochemical double staining using two monoclonal antibodies and for combined immunohistochemistry and DNA in situ

  19. Immunohistochemical Expression of COX-2 in Uterine Serous Carcinoma Tissue

    Directory of Open Access Journals (Sweden)

    Joseph Menczer

    2016-03-01

    Material and methods. Cox-2 expression assessment by immunohistochemistry was performed on deparaffinized sections of paraffin-embedded tissue blocks of consecutive available USC uterine specimens of patients diagnosed from 2000 to 2014. Staining of more than 10% of the cells was considered positive. Staining intensity was graded on a 0 and ndash;3 scale. A scoring index was calculated by multiplying the intensity grade by the percentage of stained cells and considered low when it was equal to 1 or less and high when it was more than 1. Clinicopathological data were retrospectively abstracted from the records of the study group patients Results. The study comprised uterine specimens of 31 USC patients. Positive immunohistochemical staining was observed in 25 (80.6% USC specimens and a high score in 6 (19.4% of them. No association between immunohistochemical staining parameters and clinicopathological prognostic factors was observed. Conclusion. Although our findings should be verified in larger series, it seems that in view of the lack of association between immunohistochemical Cox-2 staining parameters in USC tissue and clinicopathological prognostic factors, this aggressive tumor is not a candidate for the use of selective Cox-2 inhibitors. Key words: Cox-2 expression, uterine carcinosarcoma, clinicopathological prognostic factors [J Interdiscipl Histopathol 2016; 4(1.000: 9-12

  20. Immunohistochemical detection of vinculin in human rhabdomyosarcomas.

    Science.gov (United States)

    Meyer, T; Brinck, U

    1997-02-01

    The microfilament-associated protein vinculin is a major constituent of muscle tissue localized in costameres and Z-discs of the sarcomeric apparatus, where it is thought to play a pivotal role in the alignment of sarcomeric myofibrils and the transduction of mechanical force between the internal contractile machinery and the extracellular environment. In order to investigate whether anti-vinculin antibodies are helpful in confirming the commitment of rhabdomyosarcomas to the myogenic pathway, we studied immunohistochemically the expression pattern of vinculin in a series of 7 human rhabdomyosarcomas including those of embryonal, botryoid, and pleomorphic subtypes. Using monoclonal antibody from clone hVIN-1 by APAAP techniques on formalin-fixed, paraffin-embedded tissue, all but one tumor, which was a primitive embryonal rhabdomyosarcoma, demonstrated a significant positive vinculin staining. Vinculin expression was most prominent in differentiated tumors with a focal staining pattern showing a high degree of correlation with rhabdomyoblasts, whereas a diffuse staining was observed in areas in which small, poorly differentiated tumor cells alone were present. Since vinculin immunoreactivity could also be demonstrated in cases of leiomyosarcoma, the positive immunohistochemical detection of vinculin was not exclusively restricted to mesenchymal tumors derived from sarcomeric muscle tissue. Immunodetectable amounts of nebulin could be revealed only in two embryonal rhabdomyosarcomas. Our results suggested that the positive identification of rhabdomyosarcoma achieved by using antibodies against vinculin in addition to other known myogenic markers may be particularly useful in the differential diagnosis of anaplastic, poorly differentiated sarcomas.

  1. Acid-fast stain

    Science.gov (United States)

    ... this page: //medlineplus.gov/ency/article/003766.htm Acid-fast stain To use the sharing features on this page, please enable JavaScript. The acid-fast stain is a laboratory test that determines ...

  2. Immunohistochemical detection of Her-2/neu overexpression in ...

    African Journals Online (AJOL)

    Materials and Methods: Immunohistochemical staining for Her-2/neu was performed on 10% formalin-fixed, paraffinembedded primary carcinoma of the breast from 83 patients, between 2003 and 2007 using anti-Her-2/neu rabbit polyclonal antibody (DakoCytomation, CA, USA) and reactivity detected by an avidin-biotin ...

  3. Immunohistochemical detection of interstitial collagens in bone and cartilage tissue remnants in an infant Peruvian mummy.

    Science.gov (United States)

    Nerlich, A G; Parsche, F; Kirsch, T; Wiest, I; von der Mark, K

    1993-07-01

    We investigated the immunohistochemical presence of various collagen types in bone and cartilage tissue from an infant Peruvian mummy dating between 500 and 1000 A.D. which had been excavated at the necropolis of Las Trancas in the Nazca region in Peru. Following careful rehydration and decalcification of the tissue, the mummy tissue showed morphologically good preservation of the matrix, which could be shown to be composed of various collagen types in a typical pattern. Bone consisted of a collagen I matrix with a small rim of collagen III and V at the endosteal lining and a pericellular collagen V staining around osteocytic holes. In the hypertrophic cartilage of the epiphyseal growth plate, a typical pattern of collagen types II and X could be found. These observations provide evidence that in well-preserved mummy tissue the antigenic determinants of major matrix components are still adequately preserved for an immunohistochemical analysis. This technique may thus be a very helpful tool for the analysis of pathologic processes of historic bone tissue. It may also allow in certain circumstances a distinction between pseudopathologic tissue destruction and pathologic tissue alteration.

  4. Technique and Feasibility of a Dual Staining Method for Estrogen Receptors and AgNORs

    Directory of Open Access Journals (Sweden)

    Lukas Günther

    2000-01-01

    Full Text Available A new staining method for dual demonstration of Estrogen receptors (ER and argyrophilc Nucleolus‐Organizer Regions (AgNORs was developed. To rule out possible reciprocal effects, serial slides of 10 invasive ductale breast cancers were stained with either the single staining method or the simultaneous ER/AgNOR‐staining method and investigated comparatively. By measuring the slides with the image analysis system AMBA, reciprocal effects could be excluded. It was proven that dual staining of both markers results in a reproducible and specific staining result. We concluded that it is justified to measure AgNORs in immunohistochemically stained cells.

  5. Osteoclastic giant cell tumor of the pancreas: an immunohistochemical study

    DEFF Research Database (Denmark)

    Dizon, M A; Multhaupt, H A; Paskin, D L

    1996-01-01

    A case of an osteoclastic giant cell tumor of the pancreas is presented. Immunohistochemical studies were performed, which showed keratin (CAM, AE1) and epithelial membrane antigen positivity in the tumor cells. The findings support an epithelial origin for this tumor....

  6. Osteoclastic giant cell tumor of the pancreas: an immunohistochemical study.

    Science.gov (United States)

    Dizon, M A; Multhaupt, H A; Paskin, D L; Warhol, M J

    1996-03-01

    A case of an osteoclastic giant cell tumor of the pancreas is presented. Immunohistochemical studies were performed, which showed keratin (CAM, AE1) and epithelial membrane antigen positivity in the tumor cells. The findings support an epithelial origin for this tumor.

  7. Prostate-specific antigen-positive extramammary Paget's disease--association with prostate cancer

    DEFF Research Database (Denmark)

    Hammer, Anne; Hager, Henrik; Steiniche, Torben

    2008-01-01

    Extramammary Paget's disease (EMPD) is a rare intraepidermal adenocarcinoma that primarily affects the anogenital region. Cases of EMPD reacting with PSA (prostate-specific antigen) have previously been associated with underlying prostate cancer. However, a recent case of EMPD in our department has...... led us to question the value of PSA as an indicator of underlying prostate cancer. Clinical and pathological data were obtained for 16 cases of EMPD. Formalin-fixed, paraffin-embedded tissue blocks from the primary skin lesions were investigated using PSA and other immunohistochemical markers. 5...... of the 16 cases of EMPD stained positive for PSA (2 women and 3 men). However, no reactivity was seen for the prostatic marker P501S. Three of the five patients had been diagnosed with internal malignant disease-two with prostate cancer, stage 1. Immunohistochemical investigations of the tumour specimens...

  8. Immunohistochemical studies on postmortem lividity.

    Science.gov (United States)

    Noriko, T

    1995-04-27

    An immunohistochemical investigation of postmortem lividity was performed to illuminate localization of hemoglobin (Hb) and the mechanism of fixed lividity. The fixed lividity was defined as an unfading phenomenon by thumb finger pressure. Skin specimens were taken from 68 autopsy cases 7.5-336 h (2 weeks) postmortem. Localization of Hb of the specimens was examined by a labeled streptabidin biotin (LSAB) method using polyclonal (rabbit antihuman hemoglobin antibody) and monoclonal (mouse anti-human hemoglobin monoclonal antibody) antibodies. Positive staining for Hb was observed in various sites of the skin, i.e. in only intravascular erythrocytes, in vascular walls and perivascular tissue including sweat glands and sebaceous glands, in the dermal connective tissue, and in almost all of skin tissue except the horny layer. The diffusion of Hb into skin tissue was observed in 20 of 41 displaceable lividity cases (49%) and 11 of 27 fixed lividity cases (41%). Compared to displaceable lividity, superficial plexi in fixed lividity were filled with erythrocytes, which were markedly immunodetected. These findings support the hypothesis that the fixation of lividity is not due to diffusion of Hb into skin tissue but hemoconcentration in blood vessels.

  9. Stabilized Romanowsky blood stain.

    Science.gov (United States)

    Gilliland, J W; Dean, W W; Stastny, M; Lubrano, G J

    1979-05-01

    It has been shown that the degradation of thiazine dyes which normally occurs in methanolic solution, as in the case of Romanowsky blood stains, can be prevented by making the solution acidic. In a certain range of acidity, the stain precipitates in the form of monothiazine eosinate, but by making the solution sufficiently acidic, eosin is protonated and the precipitate cannot form. These observations have been used to develop a blood stain which is stable, even at elevated temperatures, for several months. For use the stain is neutralized by a specially formulated fixative solution.

  10. Retrospective study of 338 canine oral melanomas with clinical, histologic, and immunohistochemical review of 129 cases.

    Science.gov (United States)

    Ramos-Vara, J A; Beissenherz, M E; Miller, M A; Johnson, G C; Pace, L W; Fard, A; Kottler, S J

    2000-11-01

    Diagnostic records from 338 canine oral melanomas in 338 dogs received at the Veterinary Medical Diagnostic Laboratory (1992-1999) were reviewed. Of these tumors, 122 plus an additional 7 metastatic melanomas of unknown origin were selected for clinical follow-up, histologic review, and immunohistochemistry. Chow Chow, Golden Retriever, and Pekingese/Poodle mix breeds were overrepresented, whereas Boxer and German Shepherd breeds were underrepresented. There was no gender predisposition and the average age at presentation was 11.4 years. Forty-nine dogs were euthanized due to recurrence or metastasis. The average postsurgical survival time was 173 days. The gingiva and the labial mucosa were the most common sites. Most tumors were composed of either polygonal cells (27 cases, 20.9%), spindle cells (44 cases, 34.1%), or a mixture of the two (polygonal and spindle) (54 cases, 41.9%). Clear cell (3 cases, 2.3%) and adenoid/papillary (1 case, 0.8%) patterns were uncommon. The metastases of 6/6 oral melanomas had morphologic and immunohistochemical features similar to those of the primary tumors. Immunohistochemically, Melan A was detected in 113/122 oral (92.6%) and 5/7 (71.9%) metastatic melanomas. Only 4/163 nonmelanocytic tumors were focally and weakly positive for Melan A. Antibodies against vimentin, S100 protein, and neuron-specific enolase stained 129 (100%), 98 (76%), and 115 (89.1%) of 129 melanomas, respectively. Antibodies against other melanocytic-associated antigens (tyrosinase, glycoprotein 100) did not yield adequate staining. We conclude that Melan A is a specific and sensitive marker for canine melanomas.

  11. Potential Value of YAP Staining in Rhabdomyosarcoma.

    Science.gov (United States)

    Ahmed, Atif A; Habeebu, Sultan S; Sherman, Ashley K; Ye, Shui Q; Wood, Nicole; Chastain, Katherine M; Tsokos, Maria G

    2018-03-01

    Rhabdomyosarcoma (RMS) is a common malignancy of soft tissue, subclassified as alveolar (ARMS), pleomorphic (PRMS), spindle cell/sclerosing (SRMS), and embryonal (ERMS) types. The Yes-associated protein (YAP) is a member of the Hippo pathway and a transcriptional regulator that controls cell proliferation. We have studied the immunohistochemical expression of YAP in different RMSs, arranged in tissue microarray (TMA) and whole slide formats. Pertinent clinical data including patient age, gender, tumor location, and clinical stage were collected. Out of 96 TMA cases, 30 cases (31%) were pleomorphic, 27 (28%) were embryonal, 24 (25%) alveolar, and 15 (16%) spindle cell. Positive nuclear YAP staining was seen in the PRMS (17/30, 56.7%), SRMS (7/15, 46.7%), ERMS (19/27 or 70%), and less in ARMS (37.5%). YAP nuclear staining was significantly more prevalent in ERMS than ARMS ( p=0.02). Of the 41 whole slide cases, nuclear staining was detected in all ARMS but was restricted in distribution to 30% staining. These results highlight the role of YAP in RMS tumorigenesis, a fact that can be useful in engineering targeted therapy. Restricted nuclear YAP staining (<30% of cells) may be of value in the diagnosis of ARMS.

  12. Comparative analysis of cell proliferation ratio in plaque and erosive oral lichen planus: An immunohistochemical study.

    Science.gov (United States)

    Redder, C Pramod; Pandit, Siddharth; Desai, Dinkar; Kandagal, V Suresh; Ingaleshwar, Pramod S; Shetty, Sharan J; Vibhute, Nupura

    2014-05-01

    Proliferating cell nuclear antigen (PCNA) is a nuclear protein synthesized in the late G1 and S-phase of the cell cycle. Detection of this protein represents a useful marker of the proliferation status of lesions. This study has been carried out to evaluate the cell proliferation rate in oral lichen planus (OLP) and comparison between plaque and erosive lichen planus, which indicates the potential for malignant transformation. This study was comprised of 64 cases of histologically proven lichen planus, out of which 32 cases of plaque and erosive each was taken. Two sections were taken from each, one for H and E staining to verify histological diagnosis according to Eisenberg criteria, other sections were stained according to super sensitive polymer horse radish peroxidise method for identifying immunohistochemical expression of PCNA. Data were statistically analyzed by Tukey high-range statistical domain test. Statistically significant P value was considered lichen planus, erosive type (66.86%) showed higher expression of PCNA followed by plaque (17.07%). Overall, P value was lichen planus followed by plaque type, which ultimately results in increased rate of malignant transformation. PCNA is a good nuclear protein marker to evaluate the proliferation status of OLP. Out of the two types of lichen planus, erosive type possesses more proliferative ratio and chances of malignant change is more in this type. It emphasizes the importance of long-term follow-up with erosive type when compared with plaque type.

  13. Iron Stain on Wood

    Science.gov (United States)

    Mark Knaebe

    2013-01-01

    Iron stain, an unsightly blue–black or gray discoloration, can occur on nearly all woods. Oak, redwood, cypress, and cedar are particularly prone to iron stain because these woods contain large amounts of tannin-like extractives. The discoloration is caused by a chemical reaction between extractives in the wood and iron in steel products, such as nails, screws, and...

  14. Endocervical gram stain

    Science.gov (United States)

    ... no symptoms. Alternative Names Gram stain of cervix; Gram stain of cervical secretions References Marrazzo JM, Apicella MA. Neisseria gonorrhoeae (gonorrhea). In: Bennett JE, Dolin R, Blaser MJ, eds. Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases, Updated Edition . 8th ...

  15. Dramatic Stained Glass.

    Science.gov (United States)

    Prater, Michael

    2002-01-01

    Describes an art project that is appropriate for students in fifth through twelfth grade in which they create Gothic-style stained-glass windows. Discusses how college students majoring in elementary education created stained-glass windows. Addresses how to adapt this lesson for younger students. (CMK)

  16. Joint Variable Selection and Classification with Immunohistochemical Data

    Directory of Open Access Journals (Sweden)

    Debashis Ghosh

    2009-01-01

    Full Text Available To determine if candidate cancer biomarkers have utility in a clinical setting, validation using immunohistochemical methods is typically done. Most analyses of such data have not incorporated the multivariate nature of the staining profiles. In this article, we consider modelling such data using recently developed ideas from the machine learning community. In particular, we consider the joint goals of feature selection and classification. We develop estimation procedures for the analysis of immunohistochemical profiles using the least absolute selection and shrinkage operator. These lead to novel and flexible models and algorithms for the analysis of compositional data. The techniques are illustrated using data from a cancer biomarker study.

  17. Phenotypical heterogeneity of testicular macrophages/dendritic cells in normal adult mice: an immunohistochemical study

    NARCIS (Netherlands)

    Itoh, M.; de rooij, D. G.; Jansen, A.; Drexhage, H. A.

    1995-01-01

    The distribution of macrophage/dendritic cell antigens was investigated immunohistochemically in frozen testis sections of normal A/J mice using a panel of rat monoclonal antibodies against murine macrophage/dendritic cell antigens (F4/80, BM8, MP23, MOMA1, MOMA2, M5/114, BMDM1 and NLDC145).

  18. Stool Gram stain

    Science.gov (United States)

    ... of stool; Feces Gram stain References Allos BM. Campylobacter infections. In: Goldman L, Schafer AI, eds. Goldman- ... Bacterial Infections Read more Foodborne Illness Read more Gastroenteritis Read more A.D.A.M., Inc. is ...

  19. Immunohistochemical Study of Scrub Typhus: A Report of Two Cases

    Directory of Open Access Journals (Sweden)

    Bo-Yuan Tseng

    2008-02-01

    Full Text Available Scrub typhus is a zoonotic disease caused by Orientia tsutsugamushi, which is transmitted by chiggers. The target cells of this rickettsia are poorly defined in humans. Immunohistochemical staining of tissue sections of patients with scrub typhus is helpful in investigating the target cells of this rickettsia in different organs. We studied two autopsy specimens by immunohistochemical staining using a specific antibody against O. tsutsugamushi. Rickettsiae were located in endothelial cells in all of the organs evaluated, namely heart, lung, brain, kidney, appendix and skin, within cardiac muscle cells and renal tubular epithelial cells, and in macrophages located in the lymph node, liver and spleen. In conclusion, O. tsutsugamushi may disseminate into multiple organs through endothelial cells and macrophages, resulting in the development of fatal complications.

  20. Minor salivary gland tumors. A histologic and immunohistochemical study.

    Science.gov (United States)

    Regezi, J A; Lloyd, R V; Zarbo, R J; McClatchey, K D

    1985-01-01

    Clinical, histologic, and immunohistochemical data were reviewed and evaluated on 238 oral minor salivary gland tumors. Benign neoplasms accounted for 65% of the total. Pleomorphic adenomas were the most common of all neoplasms, and mucoepidermoid carcinomas were the most frequently encountered malignancies. Pleomorphic adenomas and adenoid cystic carcinomas stained positive for S-100 protein. Immunohistochemistry was believed to be of potential assistance in diagnosis of salivary gland tumors and in prediction of histogenesis.

  1. Immunohistochemical Studies of the Kynurenine Pathway in Morphea

    Directory of Open Access Journals (Sweden)

    Rowland Noakes

    2013-01-01

    Full Text Available Cutaneous sclerosis, resembling that seen in subcutaneous morphea, is a feature of eosinophilic fasciitis and eosinophilia-myalgia syndrome, two conditions in which the kynurenine pathway is known to be activated. To investigate the possibility of activation of the kynurenine pathway in morphea, skin biopsies were taken from involved and non-involved sites in a series of three patients with morphea. Immunohistochemical stains for quinolinic acid and indoleamine 2,3-dioxygenase (IDO were performed.

  2. Immunohistochemical Studies of the Kynurenine Pathway in Morphea

    OpenAIRE

    Noakes, Rowland; Mellick, Nick

    2013-01-01

    Cutaneous sclerosis, resembling that seen in subcutaneous morphea, is a feature of eosinophilic fasciitis and eosinophilia-myalgia syndrome, two conditions in which the kynurenine pathway is known to be activated. To investigate the possibility of activation of the kynurenine pathway in morphea, skin biopsies were taken from involved and non-involved sites in a series of three patients with morphea. Immunohistochemical stains for quinolinic acid and indoleamine 2,3-dioxygenase (IDO) were perf...

  3. Clinicopathologic and immunohistochemical profile of ovarian metastases from colorectal carcinoma

    OpenAIRE

    Kir, Gozde; Gurbuz, Ayse; Karateke, Ates; Kir, Mustafa

    2010-01-01

    Metastasis of colorectal adenocarcinoma of the ovary is not an uncommon occurrence and ovarian metastases from colorectal carcinoma frequently mimic endometrioid and mucinous primary ovarian carcinoma. The clinical and pathologic features of metastatic colorectal adenocarcinoma involving the ovary is reviewed with particular focus on the diagnostic challenge of distinguishing these secondary ovarian tumors from primary ovarian neoplasm. Immunohistochemical stains that may be useful in the dif...

  4. Immunohistochemical findings of the granulomatous reaction associated with tuberculosis

    Directory of Open Access Journals (Sweden)

    Shirin Karimi

    2016-01-01

    Conclusion: Detection of TB in tissue slides is still based on the histological pattern of the granuloma, which has several differential diagnoses with different treatments. Presence of mycobacterial antigens and tissue morphology can be evaluated using the IHC technique. Considering the criteria of positive IHC staining of TB granulomatous reactions, this stain not only highlights the presence of mycobacterial antigens for tissue diagnosis, but also could morphologically localize their distribution in different cells. Pathologists must be familiar with adequate staining pattern, elimination of background staining, and type of selected antibody. This method is especially important for application in countries with high prevalence of TB as a technique with early diagnostic value in tissue specimens. Early diagnosis using this technique can reduce related morbidity and mortality and decrease the rate of complications due to misdiagnosis and mistreatment of TB.

  5. Automated robust registration of grossly misregistered whole-slide images with varying stains

    Science.gov (United States)

    Litjens, G.; Safferling, K.; Grabe, N.

    2016-03-01

    Cancer diagnosis and pharmaceutical research increasingly depend on the accurate quantification of cancer biomarkers. Identification of biomarkers is usually performed through immunohistochemical staining of cancer sections on glass slides. However, combination of multiple biomarkers from a wide variety of immunohistochemically stained slides is a tedious process in traditional histopathology due to the switching of glass slides and re-identification of regions of interest by pathologists. Digital pathology now allows us to apply image registration algorithms to digitized whole-slides to align the differing immunohistochemical stains automatically. However, registration algorithms need to be robust to changes in color due to differing stains and severe changes in tissue content between slides. In this work we developed a robust registration methodology to allow for fast coarse alignment of multiple immunohistochemical stains to the base hematyoxylin and eosin stained image. We applied HSD color model conversion to obtain a less stain color dependent representation of the whole-slide images. Subsequently, optical density thresholding and connected component analysis were used to identify the relevant regions for registration. Template matching using normalized mutual information was applied to provide initial translation and rotation parameters, after which a cost function-driven affine registration was performed. The algorithm was validated using 40 slides from 10 prostate cancer patients, with landmark registration error as a metric. Median landmark registration error was around 180 microns, which indicates performance is adequate for practical application. None of the registrations failed, indicating the robustness of the algorithm.

  6. [Histopathological and immunohistochemical features of cardiac myxomas].

    Science.gov (United States)

    Hernández-Bringas, Omar; Ortiz-Hidalgo, Carlos

    2013-01-01

    Mixomas are the most common primary cardiac tumors with an estimate incidence of 0,5-1 per 10(6) individuals per year. These tumors have generated interest due to their unique location (left side of the atrial septum near the fossa ovalis), variable clinical presentation and undefined histogenesis. Most cardiac myxomas occur sporadically while approximately 10% of diagnosed cases develop as part of Carney complex. This neoplasm is of uncertain histogenesis, however, endothelial, neurogenic, fibroblastic, and cardiac and smooth muscle cells differentiation has been proposed, and rarely glandular differentiation has been observed. Recently, due to the expression of certain cardiomyocyte-specific factors, an origin of mesenchymal cardiomyocytes progenitor cells has been suggested. Histologically cardiac myxomas are mainly composed of stellated, fusiform and polygonal cells, immersed in an amorphous myxoid matrix. Immunohistochemically some endothelial markers, such as CD31, CD34, FVIIIAg, are present. Positive staining has also been reported for S-100 protein, calretinin, vimentin, desmin, smooth muscle myosin, CD56, α1 antitrypsin and α 1antichymotrypsin. Surgical resection is currently the only treatment of choice. We present in this article a histopathological and immunohistochemical review of cardiac myxomas. Copyright © 2012 Instituto Nacional de Cardiología Ignacio Chávez. Published by Masson Doyma México S.A. All rights reserved.

  7. Expression of blood group antigens A and B in pancreas of vertebrates

    Directory of Open Access Journals (Sweden)

    ELENKA GEORGIEVA

    2012-01-01

    Full Text Available The biological role of blood group antigens (BGA A and B in tissues of different vertebrates is still controversial. There are few investigations on vertebrate pancreas and no obvious explanation of their tissue expression. The aim of the present study is to follow and compare the pancreatic expression of BGA A and B in representatives of five vertebrate classes. The biotin-streptavidin-proxidase labeling system was used for immunohistochemical detection of BGA by monoclonal antibodies to human A and B antigens. The present study reveals specific immunoreactivity in acinar and epithelial cells of pancreatic efferent ducts in species free-living vertebrates. The immunoperoxidase staining shows antigenic heterogeneity in the cellular localization. The number of positive cells and the intensity of expression vary in different species. Endothelial cells are positive only in the pancreas of Emys orbicularis. The lack of BGA A and B in some species suggests that the expression of these antigens is dependent not only on the evolutionary level of the species, but mainly on some genetic control mechanisms. The production of BGA A and B and the variability in their cellular localization probably reflect the stage of cell differentiation and the mechanisms of pancreatic secretor function. The presence of histo BGA in endodermal acinar pancreatic cells confirms the assumption for the high antigenic stability and conservatism of these molecules in vertebrate histogenesis and evolution.

  8. Identification of Eps15 as antigen recognized by the monoclonal antibodies aa2 and ab52 of the Wuerzburg Hybridoma Library against Drosophila brain.

    Directory of Open Access Journals (Sweden)

    Partho Halder

    Full Text Available The Wuerzburg Hybridoma Library against the Drosophila brain represents a collection of around 200 monoclonal antibodies that bind to specific structures in the Drosophila brain. Here we describe the immunohistochemical staining patterns, the Western blot signals of one- and two-dimensional electrophoretic separation, and the mass spectrometric characterization of the target protein candidates recognized by the monoclonal antibodies aa2 and ab52 from the library. Analysis of a mutant of a candidate gene identified the Drosophila homolog of the Epidermal growth factor receptor Pathway Substrate clone 15 (Eps15 as the antigen for these two antibodies.

  9. A More Accurate Approach to Amyloid Detection and Subtyping: Combining in situ Congo Red Staining and Immunohistochemistry.

    Science.gov (United States)

    Menter, Thomas; Bachmann, Matthias; Grieshaber, Susanne; Tzankov, Alexandar

    2017-01-01

    Amyloidosis is the result of various, differently approachable diseases. It is vital to subtype the amyloid deposits in order to establish and finally treat the underlying disease properly. Besides the classical staining with Congo red, further procedures like immunohistochemical staining are needed for classification. Here, we present a more accurate approach using Congo red/immunohistochemical double staining easily applicable in routine diagnostics. Modifications of the Congo red staining technique and the immunohistochemical procedures were needed in order to combine both staining procedures on one slide. The evaluation was done using conventional light and fluorescence microscopy. By shortening the staining time for Congo red to 10 s and by modification regarding endogenous peroxidase blockage, accurate results could be obtained for evaluating the Congo red/immunohistochemistry double staining using a fluorescence microscope. Sections of 2 μm instead of 4 μm thickness were superior for evaluation, since they increased staining specificity. The combination of Congo red and immunohistochemistry as in situ double staining on one slide is a feasible approach in the diagnosis of amyloidosis. It allows focusing on the fluorescent Congo red-positive areas when evaluating immunohistochemistry, thus avoiding signing out false-positive results. Additionally, it increases the signal-to-noise ratio of the immunohistochemically stained sections on conventional microscopy. © 2016 S. Karger AG, Basel.

  10. Immunohistochemical expression of CD 10 in Cutaneous basal ,and Squamous Cell Carcinomas

    International Nuclear Information System (INIS)

    AIAD, H.A.; HANOUT, H.M.

    2007-01-01

    Background: CD 10 is a zinc-dependent metallo peptidase known as common acute lymphoblastic leukemia antigen (CALLA). Although CD I 0 expression has been investigated in some cutaneous tumors, to our knowledge, data regarding its expression in cutaneous epithelial neoplasms are very limited. We aimed to determine the immunohistochemical expression of Cd 10 in basal cell carcinoma (BCC) and squamous cell carcinoma (Succ) and to associate it with the available clinico pathological parameters in both tumors. Patients and Methods: This study included 16 Succ and 21 BCC cases (17 solid type, 2 morphea type and 2 adenoid basal types). BCC cases were divided into 12 cases with microscopic infiltrative base and 9 cases with well-circumscribed base. The localization of anti-CD 10 to the tumor and/or stromal cells was determined in each case. Results: Positive CD 10 staining was identified as brown cytoplasmic, with or without cell membrane staining. In all the 16 SCC cases, tumor cells failed to stain with CD 10 in contrast to the stromal cells that showed CD 10 expression in 13 cases (81%). In BCC cases, the expression of CD 10 was noted in tumor cells in 10 cases (476%) and in stromal cells of 20 cases (95.24%). Most of CD 10+ (7/10) BCC showed well-circumscribed deep margin, however, most of CD 10- cases (9/11) showed infiltrating base (p=0.030). BCCs with infiltrating deep margins (12 cases) tended to show CD 10 negative basaloid cells (9/12) and CD 10 positive stromal cells (12/12) (p=0.0003). Conclusion: From our results we suggest that CD 10 might be a useful immunohistochemical marker to differentiate between BCC and SCC. At least, if tumor cells were CD 10 positive, this would favor BCC over SCC. Absence of CD 10 in all the SCC and in infiltrating BCC together with its overexpression in the surrounding stromal cells might confer invasive properties to such tumors. However, its relation to other poor prognostic factors needs larger studies to be confirmed

  11. "Stained Glass" Landscape Windows

    Science.gov (United States)

    Vannata, Janine

    2008-01-01

    Both adults and children alike marvel at the grand vivid stained-glass windows created by American artist Louis Comfort Tiffany. Today he is commonly recognized as one of America's most influential designers and artists throughout the last nineteenth and early twentieth century. In the lesson described in this article, students created their own…

  12. Stained Glass and Flu

    Centers for Disease Control (CDC) Podcasts

    2017-02-01

    Dr. Robert Webster, an Emeritus member of the Department of Infectious Diseases at St. Jude Children's Research Hospital, discusses his cover art story on stained glass and influenza.  Created: 2/1/2017 by National Center for Emerging and Zoonotic Infectious Diseases (NCEZID).   Date Released: 2/1/2017.

  13. Port-wine stain

    Science.gov (United States)

    ... About MedlinePlus Show Search Search MedlinePlus GO GO About MedlinePlus Site Map FAQs Customer Support Health Topics Drugs & Supplements Videos & Tools Español You Are Here: Home → Medical Encyclopedia → Port-wine stain URL of this page: //medlineplus.gov/ency/ ...

  14. Immunohistochemical analysis of forensic evidence from a double homicide.

    Science.gov (United States)

    Miller, Rodney T; Grantham, Ross; Lockett, Bruce; Temple-Camp, Cynric; Pang, James

    2002-12-01

    We report the use of immunohistochemical staining for analysis of forensic evidence from a double homicide. A 38-year-old woman and her 7-year-old daughter were murdered by multiple blows to the head and face with a tomahawk, resulting in multiple fragments of brain tissue scattered about the murder scene. The victims' husband and father was the main suspect, who maintained that he was out of town on business during the evening of the murders. However, a shirt taken from the suspect's car on the morning after the murders (secured by the police before the suspect visited the murder scene) was found to have two small stains. DNA analysis on the stains showed the presence of the deceased wife's DNA, and immunohistochemical stains on shirt fragments conclusively documented the presence of deep central nervous system tissue, providing the critical piece of evidence needed to arrest and prosecute the suspect. This report demonstrates that shirt or similar cloth fragments can be processed into paraffin blocks and subsequently immunostained to search for and classify types of tissue fragments that may be present on the fabric.

  15. DETECTION OF TISSUE MYCOBACTERIUM TUBERCULOSIS BY DIFFERENTIATING IMMUNOPEROXIDASE STAINING

    Directory of Open Access Journals (Sweden)

    A. P. Lysenko

    2014-01-01

    Full Text Available Staining impression smears from organ and tissues with peroxidase conjugated antibodies to Mycobacterium tuberculosis complex antigens, followed by visualization with diaminobenzidine and Kinyoun stains, ensured the painting of acid-resistant Mycobacterium tuberculosis forms to rubin red, acid-susceptible ones to brown, and tissue cells and microorganisms of other species to blue. Typical bacilli were absent in the lymph nodes of patients and animals with latent infection, but acid-resistant (rubin-red granular forms were encountered in the granulomatous masses. Brown fat cells containing mycobacterial antigens, as well as acid-susceptible granular, reticular, fungoid, and rod-like forms were also found in considerable quantities.

  16. Marcação imunoistoquímica da expressão astrocitária de proteína glial fibrilar ácida e de vimentina no sistema nervoso central de cães com cinomose Immunohistochemical staining of the astrocytic expression of glial fibrillary acidic protein and vimentin in the central nervous system of dogs with canine distemper

    Directory of Open Access Journals (Sweden)

    Heloísa Orsini

    2007-12-01

    immunohistochemical staining of two astrocytic proteins - glial fibrillary acidic protein (GFAP and vimentin (VIM -, comparing samples of cerebellum and brainstem from eight dogs with canine distemper and from two healthy dogs, from different breeds and ages varying from 1 to 4 years old. Histological sections were submitted to the avidin-biotin-peroxidase indirect method of immmunohistochemical staining (ABC and the astrocytic reactivity, observed in light microscopy, was quantified in a computer system for image analysis. It was possible to notice, on most of the sections from sick animals, degenerative lesions that indicate demyelination. The immunostaining for GFAP and VIM was more intense on animals with canine distemper, specially around the ventricules and near degenerated sites. There was no significant difference between the immunostaining (GFAP and VIM of animals with canine distemper with and without inflammatory infiltrate of the cerebellar white matter. The increased immunoreactivity of astrocytes for GFAP and the VIM reexpression in injured areas indicate the astrocytic involvement on nervous tissue response to the demyelinating lesions induced by the canine distemper virus (CDV in the CNS.

  17. Immunohistochemical Study Effects of Spirulina Algae on the Induced Mammary Tumor in Rats

    International Nuclear Information System (INIS)

    BinMeferij, Mashael Mohammed

    2008-01-01

    This work aimed at investigating the protective effects of Spirulina platensis on the induced mammary tumor in rats by dimethylbenz(a)anthracene (DMBA) and the proliferation of the tumor cells by using immunohistochemical staining for proliferating cell nuclear antigen (PCNA). At 50 days of age, group 1 remained untreated, group 2 treated with 2% Spirulina platenesis in food, group 3 received 50 mg/kg DMBA i.p. groupe 4 received 50 mg/kg DMBA i.p and fed on 2% spirulina. Rats were killed when the largest mammary tumor reached 1-2 cm in diameter or after 6 months of animal>s age. All the tumors produced by DMBA were ductal carcinoma in 100% of group 3, but in group 4 two rats had mammary tumor. The groups 1 and 2 had no tumor and have the same histological and immunostaining features, but in group 4, 13/15 rats had no tumor except formation of some cysts and hyperplasia in epithelial cells. The conclusion of this work suggests that Spirulina platnesis could be considered as a chemotherapeutic agent that causes apoptosis to tumor cells by reducing the number of malignant cells and resists cancer formation. (author)

  18. Ebola Virus Disease in Pregnancy: Clinical, Histopathologic, and Immunohistochemical Findings.

    Science.gov (United States)

    Muehlenbachs, Atis; de la Rosa Vázquez, Olimpia; Bausch, Daniel G; Schafer, Ilana J; Paddock, Christopher D; Nyakio, Jean Paul; Lame, Papys; Bergeron, Eric; McCollum, Andrea M; Goldsmith, Cynthia S; Bollweg, Brigid C; Prieto, Miriam Alía; Lushima, Robert Shongo; Ilunga, Benoit Kebela; Nichol, Stuart T; Shieh, Wun-Ju; Ströher, Ute; Rollin, Pierre E; Zaki, Sherif R

    2017-01-01

    Here we describe clinicopathologic features of Ebola virus disease in pregnancy. One woman infected with Sudan virus in Gulu, Uganda, in 2000 had a stillbirth and survived, and another woman infected with Bundibugyo virus had a live birth with maternal and infant death in Isiro, the Democratic Republic of the Congo in 2012. Ebolavirus antigen was seen in the syncytiotrophoblast and placental maternal mononuclear cells by immunohistochemical analysis, and no antigen was seen in fetal placental stromal cells or fetal organs. In the Gulu case, ebolavirus antigen localized to malarial parasite pigment-laden macrophages. These data suggest that trophoblast infection may be a mechanism of transplacental ebolavirus transmission. Published by Oxford University Press for the Infectious Diseases Society of America 2016. This work is written by (a) US Government employee(s) and is in the public domain in the US.

  19. Comparative analysis of cell proliferation ratio in plaque and erosive oral lichen planus: An immunohistochemical study

    Directory of Open Access Journals (Sweden)

    C Pramod Redder

    2014-01-01

    Full Text Available Background: Proliferating cell nuclear antigen (PCNA is a nuclear protein synthesized in the late G1 and S-phase of the cell cycle. Detection of this protein represents a useful marker of the proliferation status of lesions. This study has been carried out to evaluate the cell proliferation rate in oral lichen planus (OLP and comparison between plaque and erosive lichen planus, which indicates the potential for malignant transformation. Materials and Methods: This study was comprised of 64 cases of histologically proven lichen planus, out of which 32 cases of plaque and erosive each was taken. Two sections were taken from each, one for H and E staining to verify histological diagnosis according to Eisenberg criteria, other sections were stained according to super sensitive polymer horse radish peroxidise method for identifying immunohistochemical expression of PCNA. Data were statistically analyzed by Tukey high-range statistical domain test. Statistically significant P value was considered <0.05. Results: In two types of lichen planus, erosive type (66.86% showed higher expression of PCNA followed by plaque (17.07%. Overall, P value was <0.001, which was statistically significant. It indicates that proliferation activity is more in erosive lichen planus followed by plaque type, which ultimately results in increased rate of malignant transformation. Conclusion: PCNA is a good nuclear protein marker to evaluate the proliferation status of OLP. Out of the two types of lichen planus, erosive type possesses more proliferative ratio and chances of malignant change is more in this type. It emphasizes the importance of long-term follow-up with erosive type when compared with plaque type.

  20. Primary dermal melanoma: distinct immunohistochemical findings and clinical outcome compared with nodular and metastatic melanoma.

    Science.gov (United States)

    Cassarino, David S; Cabral, Erik S; Kartha, Reena V; Swetter, Susan M

    2008-01-01

    To provide an updated and expanded analysis of clinical outcome and immunohistochemical (IHC) findings unique to primary dermal melanoma (PDM) that may be used to differentiate this entity from primary nodular melanoma (PNM) and cutaneous metastatic melanoma (MM). Cohort analysis and extensive IHC panel comparing PDM with PNM and cutaneous MM. Melanoma clinics and pathology departments of academic and VA medical centers. Thirteen patients with a solitary dermal or subcutaneous nodule of histologically proven melanoma, prospectively followed through April 30, 2007. Clinical, pathologic, and IHC assessment of patients diagnosed as having PDM. Long-term clinical outcome and determination of unique clinical and IHC features in the study cohort compared with other melanoma subtypes. Histologically, there was no evidence of an overlying in situ component, ulceration, or regression, and there was no associated nevus in any cases. Clinical history and findings from workup, including imaging studies, skin examination, and sentinel lymph node biopsy, were negative for evidence of melanoma elsewhere. The mean Breslow depth was 9.6 mm. Two patients developed satellite or in-transit recurrences, 1 developed pulmonary metastasis, and another died of liver metastases. Overall, the cohort showed a 92% melanoma-specific survival rate at a mean duration of follow-up of 44 months. The IHC findings showed that PDM exhibited lower levels of staining for the antigens p53 (P = .02), Ki-67 (Mib-1) (P = .002), cyclin D1 (P = .001), and podoplanin (recognized by D2-40 antibody) lymphovascular staining (P <.001) compared with MM and PNM. All other markers were comparable. Patients with PDM have remarkably prolonged survival compared with patients with MM or PNM of similar thickness. Preliminary results suggest that PDM may be characterized by lower levels of p53, Ki-67, cyclin D1, and D2-40 compared with histologically similar MM and PNM.

  1. Immunohistochemical detection of piscine reovirus (PRV in hearts of Atlantic salmon coincide with the course of heart and skeletal muscle inflammation (HSMI

    Directory of Open Access Journals (Sweden)

    Finstad Øystein

    2012-04-01

    Full Text Available Abstract Aquaculture is the fastest growing food production sector in the world. However, the increased production has been accompanied by the emergence of infectious diseases. Heart and skeletal muscle inflammation (HSMI is one example of an emerging disease in farmed Atlantic salmon (Salmo salar L. Since the first recognition as a disease entity in 1999 it has become a widespread and economically important disease in Norway. The disease was recently found to be associated with infection with a novel reovirus, piscine reovirus (PRV. The load of PRV, examined by RT-qPCR, correlated with severity of HSMI in naturally and experimentally infected salmon. The disease is characterized by epi-, endo- and myocarditis, myocardial necrosis, myositis and necrosis of the red skeletal muscle. The aim of this study was to investigate the presence of PRV antigens in heart tissue of Atlantic salmon and monitor the virus distribution in the heart during the disease development. This included target cell specificity, viral load and tissue location during an HSMI outbreak. Rabbit polyclonal antisera were raised against putative PRV capsid proteins μ1C and σ1 and used in immunohistochemical analysis of archived salmon heart tissue from an experimental infection. The results are consistent with the histopathological changes of HSMI and showed a sequential staining pattern with PRV antigens initially present in leukocyte-like cells and subsequently in cardiomyocytes in the heart ventricle. Our results confirm the association between PRV and HSMI, and strengthen the hypothesis of PRV being the causative agent of HSMI. Immunohistochemical detection of PRV antigens will be beneficial for the understanding of the pathogenesis of HSMI as well as for diagnostic purposes.

  2. Thymomas with prominent glandular differentiation: a clinicopathologic and immunohistochemical study of 12 cases.

    Science.gov (United States)

    Weissferdt, Annikka; Moran, Cesar A

    2013-08-01

    Twelve cases of thymomas with prominent glandular differentiation are presented. The patients were 7 men and 5 women aged between 45 and 68 years (average, 56.5 years). Clinically, the patients presented with nonspecific symptoms of chest pain, cough, and fatigue. None of the patients had a history of myasthenia gravis or other autoimmune syndrome. Thymectomy was performed in all patients. The tumor size ranged from 4 to 7 cm in greatest diameter. Macroscopically, the tumors were described as firm and light tan without areas of necrosis, hemorrhage, or cystic change. Histologically, 7 tumors were classified as spindle cell (World Health Organization type A), 2 as mixed spindle cell and conventional (A+B1), 2 as conventional (B1), and 1 as atypical thymoma (B3). In 4 cases, the tumors showed invasion into periadipose thymic tissue. All cases showed the typical growth patterns of their particular subtypes. In addition, a distinct glandular component was present in all cases showing mucinous differentiation in 4 of them. Immunohistochemical studies showed tumor cells positive for CAM5.2, cytokeratin 5/6, and Pax8 and negative for carcinoembryonic antigen, thyroid transcription factor 1, and epithelial membrane antigen. Calretinin showed focal weak staining in the nonmucinous glandular components in 3 cases. Follow-up information obtained in 8 patients showed that all were alive and well in a period ranging from 2 to 5 years. The possibility of a glandular component in thymomas should be kept in mind in the assessment of mediastinoscopic biopsies to avoid misdiagnosis for other neoplasms that may require different treatment modalities. Copyright © 2013 Elsevier Inc. All rights reserved.

  3. Ghost mycobacteria on Gram stain.

    Science.gov (United States)

    Trifiro, S; Bourgault, A M; Lebel, F; René, P

    1990-01-01

    The Gram stain is a key tool in diagnostic microbiology. Its usefulness with respect to mycobacteria is undefined. The neutrality of mycobacteria other than Mycobacterium tuberculosis on Gram staining of various clinical specimens is described. Images PMID:1688872

  4. Ghost mycobacteria on Gram stain.

    OpenAIRE

    Trifiro, S; Bourgault, A M; Lebel, F; René, P

    1990-01-01

    The Gram stain is a key tool in diagnostic microbiology. Its usefulness with respect to mycobacteria is undefined. The neutrality of mycobacteria other than Mycobacterium tuberculosis on Gram staining of various clinical specimens is described.

  5. Gram stain of urethral discharge

    Science.gov (United States)

    Urethral discharge Gram stain; Urethritis - Gram stain ... Augenbraun MH, McCormack WM. Urethritis. In: Bennett JE, Dolin R, Blaser MJ, eds. Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases, Updated Edition . ...

  6. Metastatic prolactinoma: case report with immunohistochemical assessment for p53 and Ki-67 antigens Prolactinoma metastático: relato de caso com avaliação imuno-histoquímica para os antígenos p53 e Ki-67

    Directory of Open Access Journals (Sweden)

    Paulo S. Crusius

    2005-09-01

    Full Text Available Pituitary carcinomas are rare neoplasms characterized by craniospinal and/or systemic metastases originated from the pituitary. Their histopathology is frequently indistinguishable from that of benign adenomas. The development of markers that better reflect their behavior is desirable. We present the case of a 47 year-old man with a prolactin-secreting macroadenoma who was submitted to surgeries, cranial radiation therapy, and bromocriptine treatment, but evolved to a fatal outcome after the disclosure of intracranial metastases. Tumor samples underwent p53 and Ki-67 immunohistochemical assessment. p53 was absent in all samples, a rare finding among pituitary carcinomas. Ki-67 proliferative index was 2.80% in the original tumor, 4.40% in the relapse, and 4.45% in the metastasis. The figure in the relapse is higher than the expected for a noninvasive adenoma. In conclusion, p53 staining is not positive in all pituitary carcinomas. A high Ki-67 proliferative index in a pituitary adenoma might indicate a more aggressive behavior.Carcinomas pituitários são neoplasias raras caracterizadas pela presença de metástases cranio-espinhais e/ou sistêmicas originadas da hipófise. Sua histopatologia é freqüentemente indistinguível daquela dos adenomas benignos. O desenvolvimento de marcadores que melhor reflitam o seu comportamento é desejável. Apresentamos o caso de um homem de 47 anos com um macroadenoma secretor de prolactina que foi submetido a procedimentos cirúrgicos, radioterapia e tratamento com bromocriptina, mas que evoluiu para o óbito após o descobrimento de metástases intracranianas. Amostras do tumor foram submetidas à análise imuno-histoquímica para os antígenos p53 e Ki-67. A coloração para p53 foi negativa em todas as amostras, um achado raro entre os carcinomas pituitários. O índice proliferativo Ki-67 foi 2,80% no tumor original, 4,40% na recidiva e 4,45% na metástase. O valor obtido na recidiva é maior que o

  7. The role of immunohistochemical analysis in the diagnosis of parapsoriasis.

    Science.gov (United States)

    Bordignon, Matteo; Belloni-Fortina, Anna; Pigozzi, Barbara; Saponeri, Andrea; Alaibac, Mauro

    2011-02-01

    Parapsoriasis is a chronic dermatosis whose biological distinction from early mycosis fungoides, the most frequent form of cutaneous T-cell lymphoma, is still not clearly defined. Two types of parapsoriasis have been delineated: large-plaque parapsoriasis and small-plaque parapsoriasis. The lack of clinical and histological features, which may allow distinguishing parapsoriasis from early mycosis fungoides has prompted several investigations to assess the role of immunohistochemistry in establishing a conclusive diagnosis of these conditions. However, the additional data obtained by immunohistochemical analysis concerning the CD4/CD8 ratio, the aberrant expression of T-cell antigens and the expression of proliferation markers has not generally helped establish a more definitive diagnosis. This review critically discusses these immunohistochemical markers and their use in diagnosis of parapsoriasis. Copyright © 2010 Elsevier GmbH. All rights reserved.

  8. Immunohistochemical study of the expression of cell cycle regulating proteins at different stages of bladder cancer

    DEFF Research Database (Denmark)

    Primdahl, Hanne; von der Maase, Hans; Sørensen, Flemming Brandt

    2002-01-01

    PURPOSE: The cell cycle is known to be deregulated in cancer. We therefore analyzed the expression of the cell cycle related proteins p21, p27, p16, Rb, and L-myc by immunohistochemical staining of bladder tumors.METHODS: The tissue material consisted of bladder tumors from three groups of patients...

  9. Immunohistochemical visualization of neurons and specific glial cells for stereological application in the porcine neocortex

    DEFF Research Database (Denmark)

    Lyck, Lise; Jelsing, Jacob; Jensen, Pia Søndergaard

    2006-01-01

    described. Therefore, to facilitate future stereological studies of the neuronal and glial cell populations in experimental neurological diseases in the pig, we established a battery of immunohistochemical protocols for staining of perfusion fixed porcine brain tissue processed as free floating cryostat...

  10. Immunohistochemical Expression of P53 Protein in Cutaneous Basal Cell Carcinoma: A Clinicopathological Study of 66 Cases

    Directory of Open Access Journals (Sweden)

    Vladim and iacute;r Barto and scaron;

    2016-12-01

    Full Text Available Objective: Nuclear expression of p53 protein is associated with a biological behavior in a variety of human malignancies. In cutaneous basal cell carcinoma (BCC, however, many studies have provided conflicting results in this regard. We aimed to determine whether there is relationship between p53 expression and different histologic subtypes of BCC, and whether it may indicate tumor aggressiveness. Materials and Methods: Biopsy samples from 66 cutaneous BCCs from 57 patients were collected. P53 expression was demonstrated by immunohistochemical staining using the anti-p53 antibody. Among them, 52 cases were also evaluated for Ki-67 antigen. Results: Immunoreactivity of p53 protein varied in the range of 0 to 100% of total tumor tissue (mean value 46.0%. The expression exceeding 5% of cancer tissue (positive staining was found in 54 BCCs (81.8%. Within this group, there were 25 cases (37.9% with low and 29 cases (43.9% with high expression. In superficial, superficial-nodular, nodular, nodular-infiltrative and infiltrative BCCs, p53 protein positivity was found in 100% (8/8, 80% (8/10, 70.4% (19/27, 88.2% (15/17 and 100% (4/4, respectively. We did not reveal a significant correlation between the extent of p53 protein expression and BCC subtypes except for nodular BCC, in which a number of negative cases (8/27, 29.6% were just above the threshold of statistical significance (P = 0.04. After merging cancers into non-aggressive and aggressive growth phenotype, no association with expression of p53 protein was found. There was no relationship between p53 protein expression and topographical sites after they have been gathered into sun-exposed and sun-protected locations. We did not observe any association between expression of p53 protein and Ki-67 antigen. Conclusion: In cutaneous BCC, the expression of p53 protein does not seem to reflect a biological behavior and tumor aggressiveness. Therefore, in a routine dermatopathological practice

  11. Expression of ras oncogene and major histocompatibility complex (MHC) antigen in carcinomas of the uterine cervix

    International Nuclear Information System (INIS)

    Cho, Kyung Ja; Jang, Ja June; Kim, Yong Dae; Ha, Chang Won; Koh, Jae Soo

    1993-01-01

    Consecutive 50 cases of squamous cell carcinomas of the uterine cervix diagnosed in 1992 were subjected to immunohistochemical study for ras oncogene product (p21) and MHC class II (DR) antigen using a microprobe immunostainer. Activated ras and aberrant DR expression were noted in 26 cases (52%) and 11 cases (22%) of cervical squamous cell carcinomas, respectively, without difference among histologic types. The reaction was mainly intracytoplasmic, with granular staining pattern and diffuse distribution. No direct histologic correlation between ras and DR expression was found. Four cases with HPV 16/18 DNA in superficial koilocytotic cells, revealed by in situ hybridization, showed various expression of ras and DR, and these 3 factors histologically did not seem to be affected one another. (Author)

  12. Human leukocyte antigen-G in the male reproductive system and in seminal plasma

    DEFF Research Database (Denmark)

    Larsen, Margit Hørup; Bzorek, Michael; Pass, Malene B

    2011-01-01

    One of the non-classical human leukocyte antigen (HLA) class Ib proteins, HLA-G, is believed to exert important immunoregulatory functions, especially during pregnancy. The presence of HLA protein in paternal seminal fluid has been suggested to have an influence on the risk of developing pre......-eclampsia. We have investigated whether HLA-G protein is present in human seminal plasma and in different tissue samples of the male reproductive system. Western blot technique and a soluble HLA-G (sHLA-G) assay were used to detect sHLA-G in human seminal plasma samples. Immunohistochemical staining...... was performed on paraffin-embedded tissue samples. We detected sHLA-G protein in seminal plasma, and HLA-G expression in normal testis and in epididymal tissue of the male reproductive system but not in the seminal vesicle. Furthermore, the results indicated a weak expression of HLA-G in hyperplastic prostatic...

  13. Staining properties and stability of a standardised Romanowsky stain.

    Science.gov (United States)

    Marshall, P N; Bentley, S A; Lewis, S M

    1978-03-01

    An evaluation of the standardised Romanowsky stain of Marshall et al. has been made in a routine haematology laboratory. It was noted that this stain had several advantages over the May-Grünwald Giemsa stain used in most British laboratories. These advantages include ease and speed of preparation, a shorter staining time, and reproducibility of results. These results are described in detail. The stability of the stock stain solution and of the 'working' stain (stock + buffer) has been studied by, respectively, thin-layer chromatography and visible spectroscopy. No change was detected in the composition of the stock solution at ambient temperature over a period of six months. Stability was unaffected by the composition of the container (polyethylene, PyrexTM, or soda-glass) or by daylight. The 'working' solution was stable for 3 hours. Thereafter a precipitate is formed, consisting of thiazine dyes and eosin in a molar ratio of approximately 2:1.

  14. Immunolocalization and Distribution of Rubella Antigen in Fatal Congenital Rubella Syndrome

    Science.gov (United States)

    Lazar, Mihaela; Perelygina, Ludmila; Martines, Roosecelis; Greer, Patricia; Paddock, Christopher D.; Peltecu, Gheorghe; Lupulescu, Emilia; Icenogle, Joseph; Zaki, Sherif R.

    2015-01-01

    Background An estimated 100,000 cases of congenital rubella syndrome (CRS) occur worldwide each year. The reported mortality rate for infants with CRS is up to 33%. The cellular mechanisms responsible for the multiple congenital defects in CRS are presently unknown. Here we identify cell types positive for rubella virus (RV) in CRS infants. Methods Cells and organs involved in RV replication were identified in paraffin-embedded autopsy tissues from three fatal case-patients by histopathologic examination and immunohistochemical (IHC) staining using a rabbit polyclonal RV antibody. Normal rabbit antisera and RV antisera preabsorbed with highly purified RV served as negative controls. Results RV antigen was found in interstitial fibroblasts in the heart, adventitial fibroblasts of large blood vessels, alveolar macrophages, progenitor cells of the outer granular layer of the brain, and in capillary endothelium and basal plate in the placenta. The antibody specificity was verified by IHC staining of multiple tissue sections from other infectious disease cases. RV infection of each cell type is consistent with abnormalities which have been identified in patients with CRS, in the heart, large blood vessels, and brain. Antigen distribution was consistent with inflammatory response to vascular injury and systemic spread of RV. Conclusions The identification of RV positive cell types in CRS is important to better understand the pathology and pathogenesis of CRS. PMID:26870820

  15. Digital simulation of staining in histopathology multispectral images: enhancement and linear transformation of spectral transmittance.

    Science.gov (United States)

    Bautista, Pinky A; Yagi, Yukako

    2012-05-01

    Hematoxylin and eosin (H&E) stain is currently the most popular for routine histopathology staining. Special and/or immuno-histochemical (IHC) staining is often requested to further corroborate the initial diagnosis on H&E stained tissue sections. Digital simulation of staining (or digital staining) can be a very valuable tool to produce the desired stained images from the H&E stained tissue sections instantaneously. We present an approach to digital staining of histopathology multispectral images by combining the effects of spectral enhancement and spectral transformation. Spectral enhancement is accomplished by shifting the N-band original spectrum of the multispectral pixel with the weighted difference between the pixel's original and estimated spectrum; the spectrum is estimated using M transformed to the spectral configuration associated to its reaction to a specific stain by utilizing an N × N transformation matrix, which is derived through application of least mean squares method to the enhanced and target spectral transmittance samples of the different tissue components found in the image. Results of our experiments on the digital conversion of an H&E stained multispectral image to its Masson's trichrome stained equivalent show the viability of the method.

  16. NY-ESO-1 is a sensitive and specific immunohistochemical marker for myxoid and round cell liposarcomas among related mesenchymal myxoid neoplasms.

    Science.gov (United States)

    Hemminger, Jessica A; Iwenofu, O Hans

    2013-09-01

    Myxoid and round cell liposarcomas constitute approximately one-third of all liposarcomas, a relatively common group of fat-derived soft tissue sarcomas. The histomorphology is a continuum between highly differentiated myxoid and poorly differentiated round cell components. The gold standard of diagnosis is dependent on histomorphology and/or identification of t(12;16)(q13;p11) translocation by cytogenetics or demonstration of DDIT3 rearrangements by fluorescence in situ hybridization. There are currently no diagnostic immunohistochemical stains available. The broad range of myxoid neoplasms in the differential diagnosis includes a variety of sarcomas. Given the notable differences in disease biology among myxoid neoplasms, which range from benign to aggressive, an accurate diagnosis is imperative for proper treatment and prognostication. Prompted by our recent study showing frequent expression of the cancer testis antigen NY-ESO-1 in myxoid and round cell liposarcomas, we sought to evaluate the utility of NY-ESO-1 as an immunohistochemical marker for myxoid and round cell liposarcoma among mesenchymal myxoid neoplasms within the differential diagnosis. Formalin-fixed, paraffin-embedded blocks were obtained for the following mesenchymal myxoid neoplasms (n=138): myxoid and round cell liposarcoma (n=38); well-differentiated liposarcoma (n=12); lipoma (n=20; 4 with myxoid change); extra-cardiac soft tissue myxoma (n=39); extraskeletal myxoid chondrosarcoma (n=12); myxofibrosarcoma (n=10: 5 low grade, 2 intermediate grade, 3 high grade); and low-grade fibromyxoid sarcoma (n=7). Utilizing standard immunohistochemistry protocols, full sections were stained with NY-ESO-1 (clone E978), and staining was assessed for intensity (1-2+), percentage of tumor positivity, and location. In all, 36/38 (95%) of the myxoid and round cell liposarcomas demonstrated NY-ESO-1 immunoreactivity. The majority of the positive cases (34/36; 94%) showed strong, homogenous staining (>50% tumor

  17. Immunohistochemical study of tumor markers (CEA, TPA, CA19-9, POA and Ferritin) and pancreatic exocrine enzymes(Amylase and Elastase 1) in pancreatic tumors

    OpenAIRE

    脇谷, 勇夫

    1987-01-01

    The distribution of carcinoembryonic antigen (CEA), tissue polypeptide antigen (TPA), carbohydrate antigen 19-9 (CA19-9), pancreatic oncofetal antigen (POA), Ferritin, Amylase and Elastase 1 was studied immunohistochemically using an immunoperoxidase method in 26 conventional histopathologic sections of pancreatic tumor. CEA and CA19-9 were regarded as markers secreted into the glandular lumina from cancer cells, but TPA and POA were not. The expression of these markers was different from one...

  18. Influence of radiotherapy on expression of the proliferating cell nuclear antigen (PCNA) and c-fos in human cervical cancer

    International Nuclear Information System (INIS)

    Shi Mei; Wei Lichun; Sun Chaoyang; Ma Haixin; Guo Yan

    2001-01-01

    Objective: To investigate changes of proliferating cell nuclear antigen (PCNA) expression in human cervical cancer following irradiation. Methods: Immunohistochemical staining for PCNA was performed in frozen sections of formalin-fixed cervical cancer biopsy tissues. Results: The majority of the cancer cells showed PCNA-immunoreactivity before irradiation. Following irradiation (30-40 Gy/15-20 f) PCNA-immuno-positive staining was hardly detectable in most of the cancer cells. The PCNA-immunoreactivity, however, increased after radiotherapy, and moderate or heavy immuno-positive staining for PCNA was seen in irradiated mesenchymal tissue cells. On the other hand, after irradiation Fos-immunoreactivity decreased remarkably, and Fos-immuno-positive staining was hardly detectable in most of cancer cells. No obvious change in Fos-immuno-reactivity, however, was seen in mesenchymal connective tissue following irradiation. Conclusion: Irradiation inhibits PCNA and c-fos expression in cervical cancer cells whereas it induces the expression of PCNA in mesenchymal tissue cells. The present results suggest that expression of PCNA and c-fos may be regarded as a molecular marker for evaluating the cancer cell proliferation and mesenchymal tissue repair during radiotherapy of human cervical cancer

  19. Immunohistochemical diagnosis of systemic bovine zygomycosis by murine monoclonal antibodies

    DEFF Research Database (Denmark)

    Jensen, H.E.; Aalbaek, B.; Lind, Peter

    1996-01-01

    Murine monoclonal antibodies (Mabs) against water-soluble somatic antigens (WSSA) and the wall fraction (WF) from Rhizopus arrhizus (Rhizopus oryzae) were produced in vitro by fusion of splenocytes from immunized BALB/c mice with mouse myeloma X63-Ag 8.653 cells. Supernatants reacting only...... with homologous antigens in an enzyme-linked immunosorbent assay were subsequently screened for reactivity with homologous fungi in immunohistochemical techniques. All four Mabs raised against the WF of A. arrhizus failed to react on tissues. However, four of the Mabs raised against the WSSA of R. arrhizus (Mab......-WSSA-RA-1 through Mab-WSSA-RA-4) revealed a high homologous reactivity on tissues and the cross-reactivity of these were subsequently evaluated on tissues containing other members of the family Mucoraceae and other unrelated fungi. On tissues and on immunoblots all four Mabs reacted identically...

  20. Histological and Immunohistochemical Revision of Hepatocellular Adenomas: A Learning Experience

    Directory of Open Access Journals (Sweden)

    S. Fonseca

    2013-01-01

    Full Text Available Light has been shed on the genotype/phenotype correlation in hepatocellular adenoma (HCA recognizing HNF1α-inactivated HCA (H-HCA, inflammatory HCA (IHCA, and β-catenin-activated HCA (b-HCA. We reviewed retrospectively our surgical HCA series to learn how to recognize the different subtypes histopathologically and how to interpret adequately their immunohistochemical staining. From January 1992 to January 2012, 37 patients underwent surgical resection for HCA in our institution. Nine had H-HCA (25% characterized by steatosis and loss of L-FABP expression; 20 had IHCA (55.5% showing CRP and/or SAA expression, sinusoidal dilatation, and variable inflammation; and 1 patient had both H-HCA and IHCA. In 5 patients (14%, b-HCA with GS and β-catenin nuclear positivity was diagnosed, two already with hepatocellular carcinoma. Two cases (5.5% remained unclassified. One of the b-HCA showed also the H-HCA histological and immunohistochemical characteristics suggesting a subgroup of β-catenin-activated/HNF1α-inactivated HCA, another b-HCA exhibited the IHCA histological and immunohistochemical characteristics suggesting a subgroup of β-catenin-activated/inflammatory HCA. Interestingly, three patients had underlying vascular abnormalities. Using the recently published criteria enabled us to classify histopathologically our retrospective HCA surgical series with accurate recognition of b-HCA for which we confirm the higher risk of malignant transformation. We also underlined the association between HCA and vascular abnormalities.

  1. Cellular immune responses in the lungs of pigs infected in utero with PRRSV: An immunohistochemical study

    DEFF Research Database (Denmark)

    Tingstedt, Jens Erik; Nielsen, Jens

    2004-01-01

    The cellular response in the lungs of pigs transplacentally infected with porcine reproductive and respiratory syndrome virus (PRRSV) was examined by immunohistochemistry. Double staining for the T-cell marker antigen CD3 and PRRSV demonstrated that the appearance and distribution of T-cells homing...... to the lungs of infected pigs correlated well with the presence and location of virus-infected cells. Single stainings showed that cells positive for the CD2 and CD8 antigen were almost as numerous in pneumonic lesions as CD3 positive cells whereas cells expressing the CD4 antigen were rare. The morphology...

  2. An immunohistochemical comparison between MiTF and MART-1 with Azure blue counterstaining in the setting of solar lentigo and melanoma in situ.

    Science.gov (United States)

    Hillesheim, Paul B; Slone, Steve; Kelley, Denise; Malone, Janine; Bahrami, Soon

    2011-07-01

    Evaluation of cutaneous pigmented lesions can be diagnostically challenging and represents an activity often supplemented by immunohistochemistry. Immunohistochemical studies typically employ 3,3'-diaminobenzidine (DAB) resulting in brown staining of both melanocytes and melanin. Difficulty may thus arise in distinguishing different cell types in heavily melanized lesions. Azure blue counterstaining has been used in conjunction with melanoma antigen recognized by T-cells (MART-1) to differentiate melanocytes from melanin by highlighting the latter blue-green. Microphthalmia transcription factor (MiTF) represents an alternative immunomarker that shows nuclear reactivity, which facilitates ease of interpretation. Twenty examples of solar lentigo and melanoma in situ (MIS) were independently evaluated utilizing MiTF and MART-1/Azure blue for melanocyte quantification. Melanocyte counts were averaged over five high-power fields (×400) to obtain a mean melanocytic count. There was no significant difference in the mean melanocytic count between MART-1/Azure blue and MiTF as assessed in the solar lentigo group and as assessed independently in the MIS group. MiTF nuclear staining facilitated interpretation and required less laboratory preparation, as an additional counterstain was not necessary. MiTF is as effective as MART-1/Azure blue in identifying melanocytes in the context of solar lentigo or MIS. On the basis of our results, we favor expanding the use of MiTF as an immunohistochemical marker, as it provides an efficient alternative to MART-1 with Azure blue counterstaining in the evaluation of cutaneous pigmented lesions. Copyright © 2011 John Wiley & Sons A/S.

  3. A new bacterial staining method involving Gram stain with theoretical considerations of the staining mechanism.

    Science.gov (United States)

    Noda, Y; Tôei, K

    1992-01-01

    In order to investigate the mechanism of Gram staining of bacteria, tests with anionic dyes followed by treatment with cationic octyltrimethylammonium (OTMA) were carried out. The study revealed that tetrabromophenolphthalein ethylester (TBPE) gave the most reliable staining of Gram-negative bacteria with negative staining of Gram-positive bacteria. Tests on many species of bacteria showed that TBPE positive bacteria were Gram-negative and vice versa, without exception.

  4. Immunohistochemical analysis of cytokeratin expression in dog skin.

    Science.gov (United States)

    Kozaki, M; Nakamura, Y; Iguchi, M; Kano, R; Watanabe, S; Fujiwara, K; Hasegawa, A

    2001-01-01

    The expression of cytokeratins and involucrin was analyzed to identify the skin cells which compose the epidermis of dogs. The distribution of cytokeratins and involucrin in normal dog skin was immunohistochemically examined with 27 commercial monoclonal antibodies for human use. Antibodies, No.4. OV-TL12/13, 35betaH11, 4.1.18, CAM5.2, NCL5D3, Ks.13.1, Ks.18.04, Ks.19.1, 170.2.]4 and Ks.20.8 stained hair follicles and/or the sweat gland duct, but not the epidermis. Antibodies, 34betaB4, AE3, 34betaE12. LP34, RCK102, MNF116, AE1, KLI, DE-K10 and DE-K13 reacted with every layer of the epidermis, hair follicles and the sweat gland duct. These results were similar to those reported in the human skin. No positive staining, however, could be detected in the epidermis, hair follicles and the sweat gland duct with commercial antibodies, 6B10, Ks.7.18, Mu146-uc, E3, RCK108 and involucrin. Therefore, immunohistochemical investigation with these commercial antibodies developed for human skin examination might be available for investigating the origin of skin tumors in dogs.

  5. Intramuscular inoculation of cattle with Sarcocystis antigen results in focal eosinophilic myositis.

    Science.gov (United States)

    Vangeel, L; Houf, K; Geldhof, P; Nollet, H; Vercruysse, J; Ducatelle, R; Chiers, K

    2012-02-10

    Bovine eosinophilic myositis (BEM) is a subclinical myopathy characterized by multifocal white to grey-green discolorations in skeletal muscles, heart, tongue and oesophagus. These lesions are found at slaughter or during meat cutting and result in considerable economic losses. The etiology and pathogenesis are unclear, although it has been suggested, that Sarcocystis species are involved. To elucidate their role, two calves were repeatedly injected intramuscularly with adjuvanted Sarcocystis antigen. The morphological changes at the injection sites in these calves were histologically and immunohistochemically compared to spontaneous lesions from 44 BEM condemned carcasses sampled in slaughterhouses. Experimental intramuscular injection of Sarcocystis antigen resulted in lesions at the injection sites that were similar to the lesions of natural cases of BEM. They were characterized by massive infiltration of eosinophilic granulocytes, reactive macrophages (MAC387(+) cells), T-cells (CD3(+)) and B-cells (CD20(+)). Both in the experimental and in the natural cases, COX-2 expression was present in endothelial cells adjacent to lesional areas. MHC class II(+) staining was found amongst others in muscle cells surrounding the lesion. These results show that Sarcocystis antigens can induce an inflammatory response in bovine muscle having the characteristics of natural BEM. Copyright © 2011 Elsevier B.V. All rights reserved.

  6. Epidermization in the esophageal mucosa: unusual epithelial changes clearly detected by Lugol's staining.

    Science.gov (United States)

    Nakanishi, Y; Ochiai, A; Shimoda, T; Yamaguchi, H; Tachimori, Y; Kato, H; Watanabe, H; Hirohashi, S

    1997-05-01

    A 58-year-old Japanese man with superficial esophageal cancer accompanied by unusual epithelial changes, including esophageal mucosal epidermization, is reported. Staining with Lugol's iodine clearly showed irregular unstained lesions, which could not be seen clearly macroscopically, in the resected specimen. Histologic examination of the irregular unstained areas showed definite granular and horny layers regarded as epidermization, acanthosis with slight nuclear enlargement, and epithelial atrophy. The immunohistochemical staining patterns of keratins in the epidermized and atrophic lesions were similar to those in the epidermis, and the keratin staining patterns of the acanthotic lesion were similar to those of the oral epithelium.

  7. Clinical, pathological, and immunohistochemical findings in bald eagles (Haliaeetus leucocephalus) and golden eagles (Aquila chrysaetos) naturally infected with West Nile virus.

    Science.gov (United States)

    Wünschmann, Arno; Timurkaan, Necati; Armien, Aníbal G; Bueno Padilla, Irene; Glaser, Amy; Redig, Patrick T

    2014-09-01

    Fifteen bald eagles (Haliaeetus leucocephalus) and 3 golden eagles (Aquila chrysaetos) were diagnosed with West Nile disease based on 1) presence of lesions in brain, eyes, and heart, 2) viral antigen detection in brain, eyes, heart, kidney, and/or liver by immunohistochemical staining, 3) detection of viral RNA in tissue samples and/or cerebrospinal fluid (CSF) by polymerase chain reaction, and/or 4) detection of West Nile virus (WNV)-specific antibodies in CSF by serum neutralization assay. West Nile virus-associated gross lesions included cerebral pan-necrosis with hydrocephalus ex vacuo (7/15 bald eagles), fibrin exudation into the fundus in 1 golden eagle, retinal scarring in 1 bald eagle, and myocardial pallor and rounded heart apex in 4 bald eagles. Histologic lesions included lymphoplasmacytic encephalitis, most prominently in the cerebrum (17 eagles), lymphoplasmacytic pectenitis and choroiditis (15 and 8 eagles, respectively), and myocarditis (12 eagles). West Nile virus antigen was detected in the majority of the eagles in neurons of the brain (cerebrum and cerebellum), and less commonly present in neurons of the retina, tubular epithelial cells of the kidney, and cardiomyocytes. West Nile disease was diagnosed in 2 bald eagles based on the presence of cerebral pan-necrosis and WNV-specific antibodies in the CSF despite lacking viral antigen and RNA. In conclusion, WNV infection causes a fatal disease in bald and golden eagles. A variety of gross and histologic lesions are highly suggestive of WN disease in most eagles. A combination of detection of viral antigen and/or RNA or virus-specific antibodies proved useful in confirming the diagnosis. © 2014 The Author(s).

  8. An evaluation of some commerical Romanowsky stains.

    Science.gov (United States)

    Marshall, P N; Bentley, S A; Lewis, S M

    1975-08-01

    The staining properties of 43 commerical Romanowsky-type stains have been studied. Considerable differences in the appearance of stained blood films were observed with different batches of these stains, the staining of red cells being particularly variable. Attempts have been made to correlate staining patterns with stain composition as revealed by thin-layer chromatography and sulphated ash analyses. In this way it has been possible to define some essential requirements for satisfactory staining.

  9. Successful Treatment of Granuloma Faciale with Topical Tacrolimus: A Case Report and Immunohistochemical Study

    Directory of Open Access Journals (Sweden)

    Gen-ichi Tojo

    2012-07-01

    Full Text Available We report the case of a 55-year-old Japanese patient with granuloma faciale (GF successfully treated with topical tacrolimus and describe the immunohistochemical study. Immunohistochemical staining revealed that the patient’s granuloma contained CD3+, CD4+, CD8+, CD68+ and CD163+ cells. Interestingly, these cells contained granulysin+ T cells and lacked Foxp3high+ regulatory T cells. In addition, the macrophages were mainly CD163+, which suggested that the alternatively activated macrophage is one of the main components of GF. In summary, the present data shed light on the granuloma-composing cells and possible mechanisms in the treatment of GF with topical tacrolimus.

  10. Clinicopathologic, Immunohistochemical, and Ultrastructural Findings of a Fatal Case of Middle East Respiratory Syndrome Coronavirus Infection in the United Arab Emirates, April 2014.

    Science.gov (United States)

    Ng, Dianna L; Al Hosani, Farida; Keating, M Kelly; Gerber, Susan I; Jones, Tara L; Metcalfe, Maureen G; Tong, Suxiang; Tao, Ying; Alami, Negar N; Haynes, Lia M; Mutei, Mowafaq Ali; Abdel-Wareth, Laila; Uyeki, Timothy M; Swerdlow, David L; Barakat, Maha; Zaki, Sherif R

    2016-03-01

    Middle East respiratory syndrome coronavirus (MERS-CoV) infection causes an acute respiratory illness and is associated with a high case fatality rate; however, the pathogenesis of severe and fatal MERS-CoV infection is unknown. We describe the histopathologic, immunohistochemical, and ultrastructural findings from the first autopsy performed on a fatal case of MERS-CoV in the world, which was related to a hospital outbreak in the United Arab Emirates in April 2014. The main histopathologic finding in the lungs was diffuse alveolar damage. Evidence of chronic disease, including severe peripheral vascular disease, patchy cardiac fibrosis, and hepatic steatosis, was noted in the other organs. Double staining immunoassays that used anti-MERS-CoV antibodies paired with immunohistochemistry for cytokeratin and surfactant identified pneumocytes and epithelial syncytial cells as important targets of MERS-CoV antigen; double immunostaining with dipeptidyl peptidase 4 showed colocalization in scattered pneumocytes and syncytial cells. No evidence of extrapulmonary MERS-CoV antigens were detected, including the kidney. These results provide critical insights into the pathogenesis of MERS-CoV in humans. Copyright © 2016 American Society for Investigative Pathology. Published by Elsevier Inc. All rights reserved.

  11. The Prognostic Role of STEAP1 Expression Determined via Immunohistochemistry Staining in Predicting Prognosis of Primary Colorectal Cancer: A Survival Analysis.

    Science.gov (United States)

    Lee, Ching-Hsiao; Chen, Sung-Lang; Sung, Wen-Wei; Lai, Hung-Wen; Hsieh, Ming-Ju; Yen, Hsu-Heng; Su, Tzu-Cheng; Chiou, Yu-Hu; Chen, Chia-Yu; Lin, Cheng-Yu; Chen, Mei-Ling; Chen, Chih-Jung

    2016-04-19

    STEAP1 (six transmembrane epithelial antigen of the prostate 1) is a transmembrane protein that functions as a potential channel or transporter protein. It is overexpressed in certain cancers and is viewed as a promising therapeutic target. However, the prognostic role of STEAP1 is still controversial, and no role for STEAP1 has yet been indicated in colorectal cancer. The aim of this study was to investigate the possible association of STEAP1 expression with colorectal cancer prognosis. STEAP1 expression was analyzed by immunohistochemical staining of a tissue array of 165 cancer specimens from primary colorectal cancer patients. The mean and medium follow-up times after surgery were 5.1 and 3.9 years, respectively. A total of 139 patients died during the 13 years of follow-up in the survey period. The prognostic value of STEAP1 with respect to overall survival was analyzed by Kaplan-Meier analysis and Cox proportional hazard models. In total, 164 samples displayed detectable STEAP1 expression in the cytoplasm and membrane. Low STEAP1 expression was correlated with poor overall survival (five-year survival: 33.7% vs. 57.0%, low expression vs. high expression, p = 0.020). Accordingly, multivariate analysis identified low STEAP1 expression as an independent risk factor (hazard ratio = 1.500, p = 0.018), especially in elderly patients or those with late stage cancers, late T values, and early N values. We suggest that analysis of STEAP1 expression by immunohistochemical staining could serve as an independent prognostic marker for colorectal patients. This finding should be validated by other investigative groups.

  12. Basal Cell Carcinoma With Matrical Differentiation: Clinicopathologic, Immunohistochemical, and Molecular Biological Study of 22 Cases.

    Science.gov (United States)

    Kyrpychova, Liubov; Carr, Richard A; Martinek, Petr; Vanecek, Tomas; Perret, Raul; Chottová-Dvořáková, Magdalena; Zamecnik, Michal; Hadravsky, Ladislav; Michal, Michal; Kazakov, Dmitry V

    2017-06-01

    Basal cell carcinoma (BCC) with matrical differentiation is a fairly rare neoplasm, with about 30 cases documented mainly as isolated case reports. We studied a series of this neoplasm, including cases with an atypical matrical component, a hitherto unreported feature. Lesions coded as BCC with matrical differentiation were reviewed; 22 cases were included. Immunohistochemical studies were performed using antibodies against BerEp4, β-catenin, and epithelial membrane antigen (EMA). Molecular genetic studies using Ion AmpliSeq Cancer Hotspot Panel v2 by massively parallel sequencing on Ion Torrent PGM were performed in 2 cases with an atypical matrical component (1 was previously subjected to microdissection to sample the matrical and BCC areas separately). There were 13 male and 9 female patients, ranging in age from 41 to 89 years. Microscopically, all lesions manifested at least 2 components, a BCC area (follicular germinative differentiation) and areas with matrical differentiation. A BCC component dominated in 14 cases, whereas a matrical component dominated in 4 cases. Matrical differentiation was recognized as matrical/supramatrical cells (n=21), shadow cells (n=21), bright red trichohyaline granules (n=18), and blue-gray corneocytes (n=18). In 2 cases, matrical areas manifested cytologic atypia, and a third case exhibited an infiltrative growth pattern, with the tumor metastasizing to a lymph node. BerEP4 labeled the follicular germinative cells, whereas it was markedly reduced or negative in matrical areas. The reverse pattern was seen with β-catenin. EMA was negative in BCC areas but stained a proportion of matrical/supramatrical cells. Genetic studies revealed mutations of the following genes: CTNNB1, KIT, CDKN2A, TP53, SMAD4, ERBB4, and PTCH1, with some differences between the matrical and BCC components. It is concluded that matrical differentiation in BCC in most cases occurs as multiple foci. Rare neoplasms manifest atypia in the matrical areas

  13. Immunohistochemical staining of human sperm cells in smears from sexual assault cases

    DEFF Research Database (Denmark)

    Christoffersen, S.

    2011-01-01

    In the routine clinical examination of sexual assault victims, apart from documenting physical evidence of abuse, securing evidence, typically DNA from blood, semen, or saliva, is an important part of the process. Often the presence of semen is considered a most interesting piece of evidence....... Not only does it often contain enough DNA for DNA profiling, but it also strongly indicates that an actual sexual act has taken place. The examination of smear slides obtained in sexual assault cases is a time-consuming task especially for the less trained and in cases where the smear only contains few...

  14. Immunohistochemical staining patterns of cytokeratins 13, 14, and 17 in oral epithelial dysplasia including orthokeratotic dysplasia.

    Science.gov (United States)

    Nobusawa, Aiko; Sano, Takaaki; Negishi, Akihide; Yokoo, Satoshi; Oyama, Tetsunari

    2014-01-01

    Diagnosis of the exact grade of oral epithelial dysplasia is difficult, and interobserver variations in grading are common. The aim of this study was to investigate the expression patterns of cytokeratins (CKs) in dysplastic oral epithelia, to identify useful double immunostaining diagnostic markers. Immunoexpression of CK13, CK14, CK17, and Ki-67 were investigated in 21 normal epithelial specimens and 146 epithelial dysplasia specimens. In epithelial dysplasia specimens, orthokeratotic dysplasia (OKD) was identified using CK10 immunostaining. Most mild dysplasia specimens were CK13+ and CK17-. In moderate dysplasia, CK13 expression tended to be lower and CK17 expression tended to be higher than in mild dysplasia. All carcinoma in situ (CIS) specimens were CK17+. In differentiated type CIS specimens, CK13 expression was weakly positive. Most epithelial dysplasia specimens were CK14+. There were no significant differences in the expression patterns of CKs between OKD and non-OKD specimens in any of the grades of dysplasia. These results indicate that CK14 expression can be used to detect early epithelial dysplasia, and that CK13 and CK17 expression are useful for detecting neoplastic changes. © 2014 The Authors. Pathology International © 2014 Japanese Society of Pathology and Wiley Publishing Asia Pty Ltd.

  15. Immunohistochemical staining for the differentiation of subungual keratoacanthoma from subungual squamous cell carcinoma.

    LENUS (Irish Health Repository)

    Connolly, M

    2008-08-01

    Subungual keratotic tumours are rare. The clinical and histological distinctions between subungual keratoacanthomas (SUKAs) and subungual squamous cell carcinomas (SCCs) are important, but often difficult. Adequate methods of differentiation between the two are required, both for the purpose of management and for assessment of prognosis.

  16. Histopathological, immunohistochemical and special stain unraveling the enigmatic carcinosarcoma - A case report

    Directory of Open Access Journals (Sweden)

    Moidin Shakil

    2015-01-01

    Full Text Available Carcinosarcoma is an extremely rare, highly malignant tumor having a characteristic of both epithelial and mesenchymal components; the epithelial component exhibiting focal squamous cell carcinoma and mesenchymal component having sarcomatoid stroma. The occurrence of carcinosarcoma in the oral cavity is very rare and only few cases have been reported in the literature, although its occurrence in other parts of the body has been widely reported.

  17. Adenomatoid spindle cell thymomas: a clinicopathological and immunohistochemical study of 20 cases.

    Science.gov (United States)

    Weissferdt, Annikka; Kalhor, Neda; Suster, Saul; Moran, Cesar A

    2010-10-01

    Twenty cases of adenomatoid spindle cell thymomas are presented. The patients are 13 males and 7 females between 7 and 82 years of age (mean: 55 y). Clinically, all patients presented with symptoms of chest pain and shortness of breath. Radiologically, an anterior mediastinal mass was discovered, and complete surgical resection was performed in all of the patients. Grossly, the tumors were described as well-defined solid tumor masses surrounded by membranous tissue, which at cut surface show a light tan homogenous surface. Areas of necrosis, hemorrhage, and/or cystic degeneration were not observed in any of the cases. Histologically, all tumors showed similar histological features and were characterized by the presence of a spindle cellular proliferation with an "adenomatoid-like" appearance, which at higher magnification showed the presence of cells with a signet-ring cell-like appearance. Rare mitotic figures were seen in some cases. Seven tumors showed transcapsular invasion, whereas 13 cases were encapsulate. Immunohistochemical studies showed positive staining for broad-spectrum keratin and keratin 7 with only scattered cells positive for calretinin and epithelial membrane antigen. Other markers including S-100 protein, desmin, smooth muscle actin, and α-feto protein were negative. Follow-up information ranging from 4 to 96 months (average: 32.3 mo) was obtained in 17 patients showing that all patients were alive. The cases herein described highlight the importance of recognizing this unusual pattern of spindle cell thymomas to avoid misdiagnosis with other tumors, namely, when dealing with small mediastinoscopic biopsies.

  18. Caudal mesenteric ganglion in the sheep - macroanatomical and immunohistochemical study.

    Science.gov (United States)

    Sienkiewicz, W; Chrószcz, A; Dudek, A; Janeczek, M; Kaleczyc, J

    2015-01-01

    The caudal mesenteric ganglion (CaMG) is a prevetrebral ganglion which provides innervation to a number of organs in the abdominal and pelvic cavity. The morphology of CaMG and the chemical coding of neurones in this ganglion have been described in humans and many animal species, but data on this topic in the sheep are entirely lacking. This prompted us to undertake a study to determine the localization and morphology of sheep CaMG as well as immunohistochemical properties of its neurons. The study was carried out on 8 adult sheep, weighing from 40 to 60 kg each. The sheep were deeply anaesthetised and transcardially perfused with 4% paraformaldehyde. CaMG-s were exposed and their location was determined. Macroanatomical observations have revealed that the ovine CaMG is located at the level of last two lumbar (L5 or L6) and the first sacral (S1) vertebrae. The ganglion represents an unpaired structure composed of several, sequentially arranged aggregates of neurons. Immunohistochemical investigations revealed that nearly all (99.5%) the neurons were DβH-IR and were richly supplied by VACHT-IR nerve terminals forming "basket-like" structures around the perikarya. VACHT-IR neurones were not determined. Many neurons (55%) contained immunoreactivity to NPY, some of them (10%) stained for Met-ENK and solitary nerve cells were GAL-positive. CGRP-IR nerve fibres were numerous and a large number of them simultaneously expressed immunoreactivity to SP. Single, weakly stained neurones were SP-IR and only very few nerve cells weakly stained for VIP.

  19. IMMUNOHISTOCHEMICAL ANALYSIS OF ORAL MUCOSA LEUKOPLAKIA

    Directory of Open Access Journals (Sweden)

    Yu. G. KOLENKO

    2016-06-01

    Full Text Available In recent years, substantial changes have occurred in the structure of oral mucosa diseases, in particular an increased ratio of precancerous diseases, so that an effective non-invasive detection of any sign of malignancy appears as an urgent and most actual task of dentistry. Aim: To study the proliferative activity of epithelial cells in Ki-67 antigenin patients with leukoplakia of the oral mucosa. Materials and method: A complex clinical and laboratory examination was performed on 155 patients with oral leukoplakia, who addressed the Operative Dentistry Department of the “A.A.Bogomolets” National Medical University of Kiev between 2010 and 2014. All patients have been subjected to a careful clinical examination, which included: dental anamnesis, visual inspection, oral examination and digital palpation of oral mucosa and tongue mucosa, biopsy of leukoplakia lesions for cytological and histological examination. Results: Histological evaluation of the material has been performed according to the WHO (2005 classification of leukoplakia. 10 (14% sites of unaltered mucosa, 10 (14% samples of hyperkeratosis without atypia, 14 (19% biopsy specimens of hyperkeratosis SIN1, 15 (21% – hyperkeratosis SIN2, 10 (14% - SIN3 and 13 (18% cases of squamous cell carcinoma were evidenced. Immunohistochemical investigation evidenced the presence of protein Ki-67 in the nuclei of epithelial cells. In the unmodified epithelium of the oral mucosa, all epithelial cells with stained nuclei are virtually located in the basal layer. Conclusion: Against the general increase of the proliferative activity of epithelial cells with increasing SIN, a characteristic distribution of proliferating cells in the thickness of the epithelium was revealed for each studied group, as follows: in the control group and in leukoplakia without atypia, immunopositive cells are located in the basal layer, in leukoplakia (SIN1, SIN2 and SIN3 – in parabasal position while, in squamous

  20. Immunohistochemical characterization of the chick marginal retina

    Directory of Open Access Journals (Sweden)

    I.P. Lima

    2007-11-01

    Full Text Available The retina is a highly differentiated tissue with a complex layered structure that has been extensively characterized. However, most of the previous studies focused on the histology of the central retina while little is known about the cellular composition, organization and function of the marginal retina. Recent research has identified a subpopulation of multipotential progenitor cells in the marginal regions of the retina, closest to the ciliary body ("ciliary marginal zone". These cells are capable of differentiation in response to an appropriate stimulus. Thus, it is possible that the structure and composition of the marginal retina are distinct from those of the central retina to accommodate the potential addition of newly formed neurons. To characterize the cellular profile of the chick marginal retina, we labeled it immunohistochemically for markers whose staining pattern is well established in the central retina: calbindin, calretinin, protein kinase C, and choline acetyltransferase. Calbindin was present at very low levels in the marginal retina putative photoreceptor layer. Calretinin-positive horizontal cells were also sparse close to the ciliary marginal zone. The bipolar cells in the marginal outer plexiform layer were positive for anti-protein kinase C antibodies, but the density of labeling was also decreased in relation to the central retina. In contrast, the marginal starburst cholinergic amacrine cell pattern was very similar to the central retina. From these data we conclude that the structure of the marginal retina is significantly different from that of the central retina. In particular, the expression of late retina markers in the marginal retina decreased in comparison to the central retina.

  1. Image-based stained glass.

    Science.gov (United States)

    Brooks, Stephen

    2006-01-01

    We present a method of restyling an image so that it approximates the visual appearance of a work of stained glass. To this end, we develop a novel approach which involves image warping, segmentation, querying, and colorization along with texture synthesis. In our method, a given input image is first segmented. Each segment is subsequently transformed to match real segments of stained glass queried from a database of image exemplars. By using real sources of stained glass, our method produces high quality results in this nascent area of nonphotorealistic rendering. The generation of the stained glass requires only modest amounts of user interaction. This interaction is facilitated with a unique region-merging tool.

  2. Thymomas with prominent signet ring cell-like features: a clinicopathologic and immunohistochemical study of 10 cases.

    Science.gov (United States)

    Weissferdt, Annikka; Moran, Cesar A

    2012-11-01

    Ten cases of an unusual growth pattern of thymomas are presented. The patients were 8 men and 2 women between the ages of 43 and 62 years. Clinically, 6 patients presented with symptoms of chest pain, cough, and shortness of breath, whereas 4 patients were asymptomatic. Surgical resection of the mediastinal mass was performed in all patients obtaining tumors that varied in size from 4 to 11 cm in greatest dimension. Grossly, the tumors were described as round and well defined, which, at cut surface, showed a firm consistency with a slight lobulated appearance. Areas of necrosis and/or hemorrhage were not present. Histologically, all the tumors showed similar growth pattern characterized by the presence of cells arranged in small cords dissecting fibroconnective tissue and, in some areas, resembling "signet ring" cells. Mitotic activity was not present. Using the Masaoka staging system, 6 cases were in stage I, and 4 cases were in stage II. Histochemical stains for periodic-acid Schiff stain with diastase and mucicarmine were negative for intracytoplasmic mucin. Immunohistochemical studies for CAM5.2 and cytokeratin 5/6 showed a strong positive reaction, whereas thyroid transcription factor 1, epithelial membrane antigen, calretinin, α-fetoprotein, and CD31 were all negative. Follow-up information obtained for 7 patients between 1 and 12 years showed that all these patients are alive and well. The current cases highlight an unusual histologic growth pattern of thymomas that likely can be confused with other tumors of the anterior mediastinum that may require different treatment approaches and carry a different prognosis. Copyright © 2012 Elsevier Inc. All rights reserved.

  3. Proliferation and invasion factors in HIV-associated dysplastic and nondysplastic oral warts and in oral squamous cell carcinoma: an immunohistochemical and RT-PCR evaluation.

    Science.gov (United States)

    Regezi, Joseph A; Dekker, Nusi P; Ramos, Daniel M; Li, Xiaowu; Macabeo-Ong, Maricris; Jordan, Richard C K

    2002-12-01

    Oral warts arising in human immunodeficiency virus (HIV) infection occasionally show marked epithelial dysplasia. However, anecdotal evidence suggests that they do not progress to oral squamous cell carcinoma (SCC). Therefore, we evaluated lesions for expression of proteins (tenascin-C, beta6 integrin, and matrix metalloproteinase-1[MMP1]) that have been identified as important in the invasive phase of oral SCC. Twenty-two oral dysplastic warts from 22 patients and 5 oral SCCs were stained for human papillomavirus (HPV) antigen, proliferation protein Ki-67, tenascin-C, beta6, and MMP1 by immunohistochemical methods. For comparison, 5 nondysplastic warts each from HIV-positive and HIV-negative patients and 5 normal mucosa specimens were included. Sections were semiquantitatively assessed, and results were compared. Because MMP1 was the lowest or least expressed interface protein, MMP1 mRNA was quantitatively assessed from formalin-fixed paraffin-embedded tissue in selected cases with quantitative reverse transcription-polymerase chain reaction. Twenty of 22 dysplastic warts stained positive for human papillomavirus common antigen, and all warts showed high proliferative fractions similar to SCCs. Tenascin-C and beta6 were variably expressed by the dysplastic warts but were consistently expressed at high levels in the SCCs. MMP1 protein levels were negative or low in 20 of 22 in dysplastic warts, but were elevated in 4 of 5 SCCs. MMP1 mRNA analysis indicated that message was low in 4 dysplastic warts and also suggested that protein translation was incomplete in 3 of the warts. We conclude that invasion-associated proteins are underexpressed in oral dysplastic warts in HIV-positive men. However, until these patients are followed for extended periods, the risk of development of SCC from oral dysplastic warts remains unknown.

  4. FLUORESCENCE OVERLAY ANTIGEN MAPPING OF THE EPIDERMAL BASEMENT-MEMBRANE ZONE .2. COLOR FIDELITY

    NARCIS (Netherlands)

    BRUINS, S; DEJONG, MCJM; HEERES, K; WILKINSON, MHF; JONKMAN, MF; VANDERMEER, JB

    In this second report on the fluorescence overlay antigen mapping (FOAM) technique, we highlight some of the errors that may influence faithful color rendition of slide preparations using triple antigen immunofluorescence staining. Reliable interpretation of multicolor fluorescence images requires

  5. Meningeal Hemangiopericytomas and Meningomas: a Comparative Immunohistochemical and Genetic Study.

    Science.gov (United States)

    Trabelsi, Saoussen; Mama, Nadia; Chourabi, Maroua; Mastouri, Maroua Haddaji; Ladib, Mohamed; Popov, Sergey; Burford, Anna; Mokni, Moncef; Tlili, Kalthoum; Krifa, Hedi; Jones, Chris; Yacoubi, Mohamed Tahar; Saad, Ali; Brahim, Dorra H'mida-Ben

    2015-01-01

    The meningeal hemangiopericytoma (MHPC) is a vascular tumor arising from pericytes. Most intracranial MHPCs resemble meningiomas (MNGs) in their clinical presentation and histological features and may therefore be misdiagnosed, despite important differences in prognosis. We report 8 cases of MHPC and 5 cases of MNG collected from 2007 to 2011 from the Neuro-Surgery and Histopathology departments. All 13 samples were re reviewed by two independent pathologists and investigated by immunohistochemistry (IHC) using mesenchymal, epithelial and neuro-glial markers. Additionally, we screened all tumors for a large panel of chromosomal alterations using multiplex ligation probe amplification (MLPA). Presence of the NAB2-STAT6 fusion gene was inferred by immunohistochemical staining for STAT6. Compared with MNG, MHPCs showed strong VIM (100% of cases), CD99 (62%), bcl-2 (87%), and p16 (75%) staining but only focal positivity with EMA (33%) and NSE (37%). The p21 antibody was positive in 62% of MHPC and less than 1% in all MNGs. MLPA data did not distinguish HPC from MNG, with PTEN loss and ERBB2 gain found in both. By contrast, STAT6 nuclear staining was observed in 3 MHPC cases and was absent from MNG. MNG and MHPC comprise a spectrum of tumors that cannot be easily differentiated based on histopathology. The presence of STAT6 nuclear positivity may however be a useful diagnostic marker.

  6. Immunohistochemical evaluation of fibrovascular and cellular pre-iridal membranes in dogs.

    Science.gov (United States)

    Bauer, Bianca S; Sandmeyer, Lynne S; Hall, Riley B; Grahn, Bruce H

    2012-03-01

    Histologically, two morphologically distinct types of pre-iridal membranes appear to occur in diseased canine globes: fibrovascular and cellular. Cellular pre-iridal membranes of corneal endothelial origin exist in iridocorneal endothelial (ICE) syndrome in humans and arise through metaplastic transformation of corneal endothelial cells into epithelial-like cells.(1) The purpose of this study was to (i) evaluate immunohistochemical staining of these two types of membranes in diseased canine globes, (ii) determine whether endothelial cell metaplasia or iridal vascular budding plays a role in cellular membrane formation and (iii) compare the primary histopathologic diagnosis between the two groups. Hematoxylin and eosin (H&E)-stained slides of 28 enucleated canine specimens with pre-iridal membranes were randomly selected and examined with light microscopy. The globes were divided into two groups based on the appearance of the membrane: fibrovascular or cellular, and the histopathologic diagnoses were recorded. Immunohistochemical staining for vimentin, cytokeratin AE1/AE3, and Von Willebrand's factor (Factor VIII) was completed on the slides of each globe. The histopathologic diagnoses were compared between the two groups. The fibrovascular and cellular membranes stained positive for vimentin and negative for cytokeratin AE1/AE3. All fibrovascular membranes stained positive for Factor VIII compared with the cellular membranes which stained negative. In the cellular membrane group, primary glaucoma was a common histologic diagnosis. Immunohistochemical evaluation in this study does not support the hypothesis of metaplastic transformation of endothelial cells into epithelial-like cells in the canine globes with cellular membranes. The cellular membranes in this study do not represent a canine version of ICE syndrome and are not of vascular endothelial origin. © 2012 American College of Veterinary Ophthalmologists.

  7. Stratification of Antigen-presenting Cells within the Normal Cornea

    Directory of Open Access Journals (Sweden)

    Jared E. Knickelbein

    2009-11-01

    Full Text Available The composition and location of professional antigen presenting cells (APC varies in different mucosal surfaces. The cornea, long considered an immune-privileged tissue devoid of APCs, is now known to host a heterogeneous network of bone marrow-derived cells. Here, we utilized transgenic mice that express enhanced green fluorescent protein (EGFP from the CD11c promoter (pCD11c in conjunction with immunohistochemical staining to demonstrate an interesting stratification of APCs within non-inflamed murine corneas. pCD11c+ dendritic cells (DCs reside in the basal epithelium, seemingly embedded in the basement membrane. Most DCs express MHC class II on at least some dendrites, which extend up to 50 µm in length and traverse up 20 µm tangentially towards the apical surface of the epithelium. The DC density diminishes from peripheral to central cornea. Beneath the DCs and adjacent to the stromal side of the basement membrane reside pCD11c-CD11b+ putative macrophages that express low levels of MHC class II. Finally, MHC class IIpCD11c-CD11b+ cells form a network throughout the remainder of the stroma. This highly reproducible stratification of bone marrow-derived cells is suggestive of a progression from an APC function at the exposed corneal surface to an innate immune barrier function deeper in the stroma.

  8. Immunohistochemical Similarities between Lichen Sclerosus et Atrophicus and Morphea: A Case Study

    Directory of Open Access Journals (Sweden)

    Aya Kakizaki

    2015-03-01

    Full Text Available Both morphea and lichen sclerosus et atrophicus (LSA are connective tissue diseases that mainly affect the skin. A recent report suggested that a substantial portion of morphea coexists with LSA. In this report, we describe a case of LSA on the abdomen accompanied by morphea; we employed immunohistochemical staining for periostin as well as MMP-7 and MMP-28, both of which are reported to facilitate fibrosis in the development of various organs, including skin. To our knowledge, this is first English language paper that demonstrates the immunohistochemical staining of periostin, MMP-7 and MMP-28 for morphea and LSA. Our present case might suggest possible mechanisms for the coexistence of two different sclerotic skin disorders.

  9. Immunohistochemical analysis of an ectopic endometriosis in the uterine round ligament

    Directory of Open Access Journals (Sweden)

    Kikuchi Yuji

    2006-09-01

    Full Text Available Abstract A rare case of the inguinal endometriosis was reported with immunohistochemical analysis. A 28-year-old woman had a thumb-sized tumor in the right groin for two years with a gradual increase in size and pain. An operation revealed an elastic hard tumor with an unclear margin and adhesion to the uterine round ligament. The histology showed irregular proliferation of the endometrial glands and stroma. The glandular epithelium stained weakly positive against CD125 antibody and the stromal matrix stained strongly positive against CD10 antibody. The nucleus in both the epithelial and stromal cells stained strongly positive against progesterone and estrogen receptor antibodies, and the cytoplasm in both types of cells stained moderately positive against COX-2 (cyclooxygenase-2 antibody. In conclusion, the combination of estrogen or progesterone receptor antibody for the nucleus and CD10 or COX-2 antibody for the cytoplasm could enhance the accuracy of diagnosis for ectopic endometriosis.

  10. Demonstration of carcinoembryonic antigen in bone marrow from patients with carcinoma.

    OpenAIRE

    Gray, A; Downing, R; Hill, R; Payne, R W; Windsor, C W

    1984-01-01

    Primary and secondary tumour and bone marrow trephine biopsies from 20 patients with carcinomas were stained for carcinoembryonic antigen by the three stage immunoperoxidase method. Six marrow biopsies contained tumour deposits, five of which were positive for carcinoembryonic antigen. A further five marrow biopsies contained single carcinoembryonic antigen positive cells of uncertain origin. Carcinoembryonic antigen staining may be a useful adjunct to conventional histology in the diagnosis ...

  11. Development of murine monoclonal antibodies for the immunohistochemical diagnosis of systemic bovine aspergillosis

    DEFF Research Database (Denmark)

    Jensen, H.E.; Aalbaek, B.; Lind, Peter

    1996-01-01

    Murine monoclonal antibodies (MAbs) against water-soluble somatic antigens (WSSA) and the wall fraction (WF) from Aspergillus fumigatus were produced by fusion of splenocytes from immunized BALB/c mice with mouse myeloma X63-Ag 8.653 cells. The supernatants of in vitro cultured hybridomas were...... techniques using formalin-fixed, paraffin-embedded tissues from experimentally infected mice. Because of a high immunohistochemical reactivity with homologous fungi, 4 MAbs raised against A. fumigatus WSSA and WF were selected for a further evaluation of cross-reactivity (diagnostic specificity......) in immunohistochemical and immunoblotting assays. In immunohistochemical assays, all MAbs raised against WSSA cross-reacted heavily with a number of other fungal species. All 4 MAbs (MAb-WF-AF-1-4) raised against the WF reacted strongly with hyphae of Aspergillus spp.; hyphae of Scedosporium apiospermum were also...

  12. FOXP3-stained image analysis for follicular lymphoma: optimal adaptive thresholding with maximal nucleus coverage

    Science.gov (United States)

    Senaras, C.; Pennell, M.; Chen, W.; Sahiner, B.; Shana'ah, A.; Louissaint, A.; Hasserjian, R. P.; Lozanski, G.; Gurcan, M. N.

    2017-03-01

    Immunohistochemical detection of FOXP3 antigen is a usable marker for detection of regulatory T lymphocytes (TR) in formalin fixed and paraffin embedded sections of different types of tumor tissue. TR plays a major role in homeostasis of normal immune systems where they prevent auto reactivity of the immune system towards the host. This beneficial effect of TR is frequently "hijacked" by malignant cells where tumor-infiltrating regulatory T cells are recruited by the malignant nuclei to inhibit the beneficial immune response of the host against the tumor cells. In the majority of human solid tumors, an increased number of tumor-infiltrating FOXP3 positive TR is associated with worse outcome. However, in follicular lymphoma (FL) the impact of the number and distribution of TR on the outcome still remains controversial. In this study, we present a novel method to detect and enumerate nuclei from FOXP3 stained images of FL biopsies. The proposed method defines a new adaptive thresholding procedure, namely the optimal adaptive thresholding (OAT) method, which aims to minimize under-segmented and over-segmented nuclei for coarse segmentation. Next, we integrate a parameter free elliptical arc and line segment detector (ELSD) as additional information to refine segmentation results and to split most of the merged nuclei. Finally, we utilize a state-of-the-art super-pixel method, Simple Linear Iterative Clustering (SLIC) to split the rest of the merged nuclei. Our dataset consists of 13 region-ofinterest images containing 769 negative and 88 positive nuclei. Three expert pathologists evaluated the method and reported sensitivity values in detecting negative and positive nuclei ranging from 83-100% and 90-95%, and precision values of 98-100% and 99-100%, respectively. The proposed solution can be used to investigate the impact of FOXP3 positive nuclei on the outcome and prognosis in FL.

  13. Correlation of mRNA and protein levels: Cell type-specific gene expression of cluster designation antigens in the prostate

    Directory of Open Access Journals (Sweden)

    Deutsch Eric W

    2008-05-01

    Full Text Available Abstract Background: Expression levels of mRNA and protein by cell types exhibit a range of correlations for different genes. In this study, we compared levels of mRNA abundance for several cluster designation (CD genes determined by gene arrays using magnetic sorted and laser-capture microdissected human prostate cells with levels of expression of the respective CD proteins determined by immunohistochemical staining in the major cell types of the prostate – basal epithelial, luminal epithelial, stromal fibromuscular, and endothelial – and for prostate precursor/stem cells and prostate carcinoma cells. Immunohistochemical stains of prostate tissues from more than 50 patients were scored for informative CD antigen expression and compared with cell-type specific transcriptomes. Results: Concordance between gene and protein expression findings based on 'present' vs. 'absent' calls ranged from 46 to 68%. Correlation of expression levels was poor to moderate (Pearson correlations ranged from 0 to 0.63. Divergence between the two data types was most frequently seen for genes whose array signals exceeded background (> 50 but lacked immunoreactivity by immunostaining. This could be due to multiple factors, e.g. low levels of protein expression, technological sensitivities, sample processing, probe set definition or anatomical origin of tissue and actual biological differences between transcript and protein abundance. Conclusion: Agreement between these two very different methodologies has great implications for their respective use in both molecular studies and clinical trials employing molecular biomarkers.

  14. Increased Expression of Focal Adhesion Kinase in Thyroid Cancer: Immunohistochemical Study

    OpenAIRE

    Kim, Sang Jin; Park, Jin Woo; Yoon, Ji Sung; Mok, Ji O; Kim, Yeo Joo; Park, Hyeong Kyu; Kim, Chul Hee; Byun, Dong Won; Lee, Yong Jin; Jin, So Young; Suh, Kyo Il; Yoo, Myung Hi

    2004-01-01

    Focal adhesion kinase (FAK) is a tyrosine kinase that is found in cellular structures called focal adhesions. FAK appears to be a key element in signal transduction pathways involved in cell adhesion and locomotion. FAK is overexpressed in various tumors, including tumors derived from regions of the head and neck, colon, breast, prostate, and liver. In this study, we investigated immunohistochemically whether FAK expression was increased in thyroid cancers. FAK staining was not seen in any of...

  15. Prostate-specific antigen and hormone receptor expression in male and female breast carcinoma

    Directory of Open Access Journals (Sweden)

    Cohen Cynthia

    2010-09-01

    Full Text Available Abstract Background Prostate carcinoma is among the most common solid tumors to secondarily involve the male breast. Prostate specific antigen (PSA and prostate-specific acid phosphatase (PSAP are expressed in benign and malignant prostatic tissue, and immunohistochemical staining for these markers is often used to confirm the prostatic origin of metastatic carcinoma. PSA expression has been reported in male and female breast carcinoma and in gynecomastia, raising concerns about the utility of PSA for differentiating prostate carcinoma metastasis to the male breast from primary breast carcinoma. This study examined the frequency of PSA, PSAP, and hormone receptor expression in male breast carcinoma (MBC, female breast carcinoma (FBC, and gynecomastia. Methods Immunohistochemical staining for PSA, PSAP, AR, ER, and PR was performed on tissue microarrays representing six cases of gynecomastia, thirty MBC, and fifty-six FBC. Results PSA was positive in two of fifty-six FBC (3.7%, focally positive in one of thirty MBC (3.3%, and negative in the five examined cases of gynecomastia. PSAP expression was absent in MBC, FBC, and gynecomastia. Hormone receptor expression was similar in males and females (AR 74.1% in MBC vs. 67.9% in FBC, p = 0.62; ER 85.2% vs. 68.5%, p = 0.18; and PR 51.9% vs. 48.2%, p = 0.82. Conclusions PSA and PSAP are useful markers to distinguish primary breast carcinoma from prostate carcinoma metastatic to the male breast. Although PSA expression appeared to correlate with hormone receptor expression, the incidence of PSA expression in our population was too low to draw significant conclusions about an association between PSA expression and hormone receptor status in breast lesions.

  16. Parvovirus infection: an immunohistochemical study using fetal and placental tissue.

    Science.gov (United States)

    Li, Jing Jing; Henwood, Tony; Van Hal, Sebastian; Charlton, Amanda

    2015-01-01

    Parvovirus B19 infection causes 5% to 15% of cases of nonimmune hydrops fetalis. The aim of our study was to evaluate the use of immunohistochemistry in diagnosing parvovirus infection in fetal and placental tissue during routine fetal and perinatal autopsies. Histology slides of 20 cases of confirmed parvovirus infection were reviewed, and immunohistochemistry was applied to selected blocks of fetal and placental tissue. Immunohistochemistry was positive in all 20 cases, and histologic viral inclusions were seen in 19 cases. Immunohistochemical staining was closely correlated with histology and was more sensitive than histology in detecting virally infected cells, especially in autolyzed tissue. All cases also had confirmatory evidence of parvovirus infection by polymerase chain reaction of fetal liver and positive maternal serology, where it was available. We conclude that parvovirus immunohistochemistry is a reliable method for diagnosing parvovirus infection, especially in autolyzed tissue where histologic assessment may be suboptimal.

  17. Immunohistochemical detection of MDR proteins in Wilms' tumour.

    Science.gov (United States)

    Hodorova, I; Rybarova, S; Vecanova, J; Plank, L; Kluchova, D

    2008-01-01

    The aim of our work was to determine the expression of three MDR proteins (MDR1/Pgp, MRP1 and LRP/MVP) in 15 tissue samples of nephroblastoma (Wilms' tumour). The majority of Wilms' tumours respond well to chemotherapy and are successfully cured, but a small subset displays resistance to therapy. The molecular mechanisms of drug resistance in this tumour type of childhood are still poorly analyzed. In our opinion, the elucidation of reasons for therapy failure in nephroblastomas is urgently needed before cure becomes a reality for children with this cancer. To demonstrate these proteins the enzyme indirect immunohistochemical method was used. The brown colour of the diaminobenzidine reaction product allowed us to define the distribution of stain clearly. Our immunohistochemical analysis did not demonstrate any expression of MDR1 in all cases of nephroblastoma (14 cases were after pre-operative chemotherapy, 1 case wasn't). The analysis of MRP1 and LRP expression in our set revealed 60% positivity for MRP1 and 26.7% positivity for LRP. The ability to recognize the multidrug resistance phenotype might assist in choosing specific chemotherapeutic regimens to improve prognosis and therapy (Tab. 2, Fig. 2, Ref. 20). Full Text (Free, PDF) www.bmj.sk.

  18. Salt stains from evaporating droplets

    NARCIS (Netherlands)

    Shahidzadeh, N.; Schut, M.F.L.; Desarnaud, J.; Prat, M.; Bonn, D.

    2015-01-01

    The study of the behavior of sessile droplets on solid substrates is not only associated with common everyday phenomena, such as the coffee stain effect, limescale deposits on our bathroom walls, but also very important in many applications such as purification of pharmaceuticals, deicing of

  19. Nodular hidradenocarcinoma with prominent squamous differentiation: case report and immunohistochemical study.

    Science.gov (United States)

    Park, H J; Kim, Y C; Cinn, Y W

    2000-09-01

    We report the case of a 24-year-old woman with nodular hidradenocarcinoma on the scalp. While histopathology of the tumor showed a circumscribed, lobulated intradermal mass with prominent squamous differentiation, the immunohistochemical study with antibodies to cytokeratins, CAM 5.2 and 19, epithelial membrane antigen, carcinoembryonic antigen, S-100 protein and p53 all demonstrated positivity. These findings confirmed that the tumor was of eccrine sweat gland origin and it was thought to be a nodular hidradenocarcinoma differentiating toward the eccrine duct and/or secretory portions. She was treated with a wide local excision and no recurrence was observed 18 months after excision.

  20. Benign neural tumors of the oral cavity: a comparative immunohistochemical study.

    Science.gov (United States)

    Chrysomali, E; Papanicolaou, S I; Dekker, N P; Regezi, J A

    1997-10-01

    To determine if immunohistochemistry can be used as adjunct to the diagnosis and classification of oral benign neural tumors, we stained 77 neurally differentiated tumors with a panel of neural-associated antibodies (S-100 protein, CD57, epithelial membrane antigen, factor XIIIa, CD34, CD68, collagen IV). Using standard histologic criteria, we identified 13 schwannomas, 16 neurofibromas, 23 traumatic neuromas, 16 palisaded and encapsulated neuromas, and 9 granular cell tumors from archived oral pathology specimens. Silver stains showed that neurofibromas, traumatic neuromas, and palisaded and encapsulated neuromas consistently contained axon filaments. Although all neural tumors contained S-100-positive cells, schwannomas and palisaded and encapsulated neuromas contained the most. All tumors expressed CD57; traumatic neuromas were stained intensely and the others stained weakly. The consistent epithelial membrane antigen capsular staining of schwannomas and the absence of factor XIIIa-positive dendritic/spindle cells helped distinguish these tumors from others. Many CD34-positive cells were found in schwannomas, and few were found in palisaded and encapsulated neuromas. Variable numbers CD68-positive cells were seen in all neural tumor types; some of these cells appeared to be macrophages and mast cells, but many were thought to be Schwann cells expressing this antigen. Collagen IV staining, apparently representing basement membrane, was generally a feature of all benign neural tumors. The immunophenotype of the granular cells of the GCTs was S-100+, CD57+, and collagen IV+ supporting the putative neural origin of these tumors. We conclude that neural origin/differentiation of a connective tissue tumor can be confirmed with stains for S-100 protein, epithelial membrane antigen, CD57, and collagen IV. Staining patterns and intensities associated with the panel of antibodies tested can be useful in tumor classification.

  1. Synovial sarcoma. An immunohistochemical study of the epithelial component

    DEFF Research Database (Denmark)

    Jørgensen, L J; Lyon, H; Myhre-Jensen, O

    1994-01-01

    Twenty-five synovial sarcomas were studied with a battery of antibodies directed against keratin and epithelial membrane antigen (EMA). The keratin antibody MNF 116 showed reactivity in 24 tumors. In addition, 22 tumors showed reactivity with the antibody Keratin Wide Spectrum, 20 with the antibody...... Keratin 56, 64, and 19 with CAM 5.2. Seventeen tumors showed reactivity with EMA. The keratin and EMA reactivity was present in cells lining obvious cleft-like structures in biphasic tumors. In the spindle cell areas of both biphasic and monophasic fibrous tumors, we found clusters of a few reacting cells...... apparently located around small clefts. In the synovioblastic tumors, clusters of plump tumor cells reactive for both the keratins and EMA were present. In conclusion, we found that proper identification of epithelial differentiation in synovial sarcomas is facilitated by an immunohistochemical application...

  2. c-Fos-related antigens in the central nervous system of an insect, Acheta domesticus.

    Science.gov (United States)

    Renucci, M; Tirard, A; Charpin, P; Augier, R; Strambi, A

    2000-12-01

    Fos-related antigens (Fra) were detected in the nuclei of neurones in young adult Acheta domesticus female crickets by immunohistochemical analysis, using an antibody that recognizes the amino-acid sequence 127-152 of c-Fos protein. Specificity of Fra immunoreactivity was confirmed by Western blot analysis of nuclear extracts from neural tissues. A major immunoreactive doublet with an apparent molecular mass of 52,000/54,000 Da was detected in nuclear extracts. Immunostaining of the 52,000/54,000 Da doublet showed variations in intensity during the first 5 days following the imaginal molt. Staining was more intense between day 2 and day 4 when ecdysteroid titers were high. Expression of Fra was low in allatectomized (i.e., deprived of juvenile hormone and ecdysteroids) and ovariectomized (i.e., deprived of ecdysteroids) females as compared to control females. These results show the involvement of hormone-regulated process in expression of Fra. The effect of nociceptive stimulation on Fra expression was tested. Twenty minutes after removal of the ovipositor, a supplementary band with an apparent molecular mass of 70,000 Da appeared in the nuclear extracts, then decreased and disappeared totally after 45 min. Several other Fos-related antigens with different temporal patterns of expression were also detected.

  3. Biochemical and immunohistochemical characterisation of mucins in ...

    African Journals Online (AJOL)

    Biochemical and immunohistochemical characterisation of mucins in 8 cases of colonic disease - a pilot study. N Chirwa, A Mall, M Tyler, B Kavin, P Goldberg, JEJ Krige, Z Lotz, D Khan, D Govender, A Hunter ...

  4. Immunohistochemical investigation of canine episcleritis.

    Science.gov (United States)

    Breaux, Carrie B; Sandmeyer, Lynne S; Grahn, Bruce H

    2007-01-01

    To identify macrophages, B cells and T cells in archived canine episcleral biopsies and to correlate these findings with the clinical presentation and therapeutic outcome. Archived formalin-fixed biopsies were immunohistochemically labeled for CD18, CD79a, and CD3 to identify macrophages, B cells and T cells, respectively. Slides were digitally photographed and positive cells were manually counted. Signalment, duration of illness, affected eye(s), treatment, and therapeutic outcome were reviewed for each dog. Dogs were divided into groups based on clinical presentation (unilateral episcleritis, bilateral episcleritis or nodular granulomatous episclerokeratitis (NGE). Twenty-four cases were evaluated. There were 19 episcleritis (13 unilateral, six bilateral) and five NGE cases. The mean age for clinical manifestations of unilateral episcleritis was 6.8 years, bilateral episcleritis was 8.7 years, and NGE was 3.8 years. The Cocker Spaniel was over-represented in the episcleritis groups. All NGE cases were Collies. Approximately 50% of the unilateral episcleritis cases resolved and did not require long-term therapy. Almost all cases of bilateral episcleritis and NGE required continuous medical therapy to maintain remission. There was a significantly higher percentage of B lymphocytes in biopsies from lesions that required ongoing medical therapy to maintain lesion remission than in the lesions that resolved, and for which medications were discontinued (P = 0.0471). The prognosis for resolution of NGE and bilateral episcleritis without long-term medical therapy is poor. There is a significant difference in the inflammatory cell population in episcleritis that resolved with medical therapy vs. episcleritis that required ongoing medical therapy.

  5. A retrospective study of the clinical, histological, and immunohistochemical manifestations of 5 dogs originally diagnosed histologically as necrotizing scleritis.

    Science.gov (United States)

    Denk, Nora; Sandmeyer, Lynne S; Lim, Christine C; Bauer, Bianca S; Grahn, Bruce H

    2012-03-01

    To describe the clinical, histological, and immunohistochemical manifestations of canine necrotizing scleritis. A retrospective examination of the clinical records and samples of ocular tissues from five dogs with a histological diagnosis 'necrotizing scleritis' was completed. Archived, formalin-fixed, paraffin-embedded samples and two control globes were stained with hematoxylin and eosin, Gram, periodic acid-Schiff (PAS) and Masson trichrome stains, and they were immunohistochemically labeled for CD3, CD18, and CD20. Of the five cases reviewed, only two could be confirmed as idiopathic necrotizing scleritis. The other three cases were retrospectively diagnosed as unilateral focal, non-necrotizing scleritis, one as episcleritis and the third was scleritis secondary to a proptosed globe based on our retrospective clinical, histological, and immunohistochemical evaluations. In these two cases, idiopathic necrotizing scleritis manifested as a bilateral, progressive, inflammatory disease of the sclera and cornea that induces significant uveitis. Light microscopic examination confirmed collagen degeneration and granulomatous inflammation. There was no evidence for an infectious etiology based on Gram's and PAS stainings. Immunohistochemical labeling revealed a predominance of B cells in idiopathic, bilateral necrotizing scleritis. Tinctorial staining abnormalities with Masson's trichrome stain were present in scleral collagen of the two cases with idiopathic necrotizing scleritis as well as a case of secondary traumatic scleritis. Based on a limited number of cases, idiopathic canine necrotizing scleritis shares similar histopathological features with non-necrotizing scleritis and episcleritis; however, necrotizing scleritis is B-cell-dominated and bilateral, and significant collagen alterations manifest with Masson's trichrome stain. © 2011 American College of Veterinary Ophthalmologists.

  6. Immunohistochemical expression of EGFR in colorectal carcinoma correlates with high but not low level gene amplification, as demonstrated by CISH.

    Science.gov (United States)

    Hemmings, Chris; Broomfield, Amy; Bean, Elaine; Whitehead, Martin; Yip, Desmond

    2009-01-01

    To assess and compare immunohistochemical expression of epidermal growth factor receptor (EGFR) with gene amplification as demonstrated by chromogenic in situ hybridisation (CISH), in colorectal adenocarcinoma. Sections from 100 consecutive colorectal cancer resection specimens were stained for EGFR using immunohistochemistry and CISH. Immunohistochemical assessment was independently performed at two laboratories, using the same antibody and protocols. With immunohistochemistry, strong circumferential membrane staining (3+ staining) was demonstrated in only 5% of cases, and this was only focal in three of five cases. At one laboratory, weak or incomplete staining (1+ or 2+) was observed in five further cases (5%), which had been negative at the other laboratory. CISH demonstrated high level gene amplification (>10 copies/nucleus) in the same five cases which had demonstrated 3+ staining with immunohistochemistry, and in those cases where the staining was focal, the amplification was demonstrated in the same foci of the tumour. Five further cases (5%) had low level amplification (5-10 copies per nucleus); these cases did not exhibit significant positive staining with immunohistochemistry. All the cases which demonstrated gene amplification (high or low level) arose in the distal colon. There was no correlation between gene amplification status and a variety of other variables, including stage at diagnosis, mucinous differentiation, neuroendocrine differentiation, or loss of expression of mismatch repair proteins. Immunohistochemical expression of EGFR is variable between laboratories, even using standardised protocols. 3+ staining is predictive of high level gene amplification, but correlates very poorly with low level amplification, which may still be clinically significant. In some cases gene amplification was only focal, offering a potential explanation for poor response to targeted therapy in patients with EGFR positive tumours.

  7. Etika Berbusana Mahasiswa Stain Samarinda

    Directory of Open Access Journals (Sweden)

    Ida Suryani Wijaya

    2012-06-01

    Full Text Available Ethics is about behavior of human being, such as which one is right or wrong. The ethics is always affecting the human life. The ethics gives people orientation how he/she do manything every time every day. Islamic ethics consists of the way how someone interact each other; how someone should do or not to do, how to sit, how to walk, how to eat or drink, how to sleep, or how to get dressed. Al-Qur’an uses three terms to define about dressing, they are: libas, tsiyah, and sarahi. Dressing has a function as covering the body, as assessoris, as the way to do Islamic taqwa, and as an identiy. Dressing ethics of the female students of STAIN Samarinda has been regulated by the rector regulation No 19 of the year 2002 about relation and dressing ethics for the students of STAIN Samarinda.

  8. Immunohistochemical profiles of claudin-3 in primary and metastatic prostatic adenocarcinoma

    Directory of Open Access Journals (Sweden)

    Becich Michael J

    2011-01-01

    Full Text Available Abstract Background Claudins are integral membrane proteins that are involved in forming cellular tight junctions. One member of the claudin family, claudin-3, has been shown to be overexpressed in breast, ovarian, and pancreatic cancer. Here we use immunohistochemistry to evaluate its expression in benign prostatic hyperplasia (BPH, prostatic intraepithelial neoplasia (PIN, normal tissue adjacent to prostatic adenocarcinoma (NAC, primary prostatic adenocarcinoma (PCa, and metastatic prostatic adenocarcinoma (Mets. Methods Tissue microarrays were immunohistochemically stained for claudin-3, with the staining intensities subsequently quantified and statistically analyzed using a one-way ANOVA with subsequent Tukey tests for multiple comparisons or a nonparametric equivalent. Fifty-three cases of NAC, 17 cases of BPH, 35 cases of PIN, 107 cases of PCa, and 55 cases of Mets were analyzed in the microarrays. Results PCa and Mets had the highest absolute staining for claudin-3. Both had significantly higher staining than BPH (p Conclusions To our knowledge, this represents one of the first studies comparing the immunohistochemical profiles of claudin-3 in PCa and NAC to specimens of PIN, BPH, and Mets. These findings provide further evidence that claudin-3 may serve as an important biomarker for prostate cancer, both primary and metastatic, but does not provide evidence that claudin-3 can be used to predict risk of metastasis.

  9. Microwave-stimulated staining of plastic embedded bone marrow sections with the Romanowsky-Giemsa stain: improved staining patterns.

    Science.gov (United States)

    Boon, M E; Kok, L P; Moorlag, H E; Gerrits, P O; Suurmeijer, A J

    1987-07-01

    Staining plastic sections with the Romanowsky-Giemsa method is both time-consuming and difficult. This paper reports how the staining time can be reduced to 25 min using microwave irradiation of the staining solution. It is shown that staining results depend on the fixative used, staining temperature, dye concentration and pH of the staining solution as well as on several parameters of the microwave irradiation technique. The staining patterns are improved when compared with those obtained by conventional staining of plastic sections. The colors are more brilliant and greater contrasts are observed. Basophilia, polychromasia, and orthochromasia accompanying red cell maturation are more pronounced. For white cell maturation the initial appearance of specific granules (neutrophil, basophil, and eosinophil) is more evident. Thus, cell classification is easily accomplished using the described technique. It is suggested that microwave-stimulated staining be considered for routine use.

  10. Standardization of the Romanowsky-Giemsa stain: the influence of staining time on the RG-staining pattern.

    Science.gov (United States)

    Schulte, E

    1987-01-01

    In this paper the influence of staining time on the staining pattern of Romanowsky-Giemsa (RG) type stains is investigated. Smears of rabbit bone marrow and of human venous blood were stained with azure B-eosin Y, azure A-eosin Y and with the cationic dyes alone under varying conditions of staining time and dye concentration. The stained smears were investigated by integrating microdensitometry. DNA-polyacrylamide (PAA) model films were stained with azure A-eosin Y, the extinction of the stained model films was determined by spectrophotometry. With increasing staining time the color of the cell nuclei changed from blue to an intense purple, the texture of the nuclear chromatin became more prominent. Prolonged staining resulted in over-staining of the cell nuclei with loss of a distinct chromatin texture. Besides such factors as dye concentration and pH of the staining solution standardization of staining time may be considered necessary for the reproducibility of the RG staining pattern.

  11. Pathological and immunohistochemical study of lethal primary brain stem injuries

    Directory of Open Access Journals (Sweden)

    Rongchao Sun

    2012-05-01

    Full Text Available Abstract Background Many of the deaths that occur shortly after injury or in hospitals are caused by mild trauma. Slight morphological changes are often found in the brain stems of these patients during autopsy. The purpose of this study is to investigate the histopathological changes involved in primary brain stem injuries (PBSI and their diagnostic significance. Methods A total of 65 patients who had died of PBSI and other conditions were randomly selected. They were divided into 2 groups, an injury group (25 cases and a control group (20 cases. Slides of each patient’s midbrain, pons, and medulla oblongata were prepared and stained with HE, argentaffin, and immunohistochemical agents (GFAP, NF, amyloid-ß, MBP. Under low power (×100 and NF staining, the diameter of the thickest longitudinal axon was measured at its widest point. Ten such diameters were collected for each part of the brain (midbrain, pons, and medulla oblongata. Data were recorded and analyzed statistically. Results Brain stem contusions, astrocyte activity, edema, and pathological changes in the neurons were visibly different in the injury and control groups (P P  Conclusions These histopathological changes may prove beneficial to the pathological diagnosis of PBSI during autopsy. The measurement of axon diameters provides a referent quantitative index for the diagnosis of the specific causes of death involved in PBSI. Virtual Slides The virtual slide(s for this article can be found here: http://www.diagnosticpathology.diagnomx.eu/vs/1345298818712204

  12. Receptor-binding cancer antigen expressed on SiSo cells (RCAS1) expression in human benign and malignant thyroid lesions.

    Science.gov (United States)

    Giaginis, Constantinos; Demetriou, Nikoleta; Alexandrou, Paraskevi; Stolakis, Vasileios; Delladetsima, Ioanna; Klijanienko, Jerzy; Griniatsos, Ioannis; Theocharis, Stamatios

    2012-04-01

    The receptor-binding cancer antigen expressed on SiSo cells (RCAS1) is a human tumor-associated antigen that contributes to tumor progression by enabling cancer cells to evade immune surveillance. The present study aimed to evaluate the clinical significance of RCAS1 expression in human benign and malignant thyroid lesions. RCAS1 protein expression was assessed immunohistochemically on paraffin-embedded thyroid tissues from 121 patients with benign and malignant lesions and was associated with type of thyroid histopathology and tumor stage parameters such as tumor size, lymph node metastases, capsular, lymphatic and vascular invasion. RCAS1 positivity, overexpression and staining intensity provided a distinct discrimination between benign and malignant thyroid cases (p=0.0006, p=0.0001 and p=0.0001, respectively), as well as between hyperplastic nodule and papillary carcinoma cases (p=0.0229, p=0.0001 and p=0.0001, respectively). RCAS1 positivity, overexpression and staining intensity also provided distinct discrimination between cases with Hashimoto thyroiditis and those with hyperplastic nodule (p=0.0221, p=0.0001 and p=0.0019, respectively). In the subgroup of malignant thyroid lesions, RCAS1 overexpression was significantly associated with large tumor size (p=0.0246), the presence of lymph node metastases (p=0.0351) and capsular invasion (p=0.0397). RCAS1 protein may participate in thyroid neoplastic transformation and could be considered as a useful biomarker to improve diagnostic scrutiny.

  13. Pathological and immunohistochemical study of lethal primary brain stem injuries.

    Science.gov (United States)

    Rongchao, Sun; Shudong, Yang; Zhiyi, Zhou

    2012-05-21

    Many of the deaths that occur shortly after injury or in hospitals are caused by mild trauma. Slight morphological changes are often found in the brain stems of these patients during autopsy. The purpose of this study is to investigate the histopathological changes involved in primary brain stem injuries (PBSI) and their diagnostic significance. A total of 65 patients who had died of PBSI and other conditions were randomly selected. They were divided into 2 groups, an injury group (25 cases) and a control group (20 cases). Slides of each patient's midbrain, pons, and medulla oblongata were prepared and stained with HE, argentaffin, and immunohistochemical agents (GFAP, NF, amyloid-β, MBP). Under low power (×100) and NF staining, the diameter of the thickest longitudinal axon was measured at its widest point. Ten such diameters were collected for each part of the brain (midbrain, pons, and medulla oblongata). Data were recorded and analyzed statistically. Brain stem contusions, astrocyte activity, edema, and pathological changes in the neurons were visibly different in the injury and control groups (P < 0.05). Characteristic changes occurred in the neural axons, axon diameter varied from axon to axon and even over different segments of one axon, and several pathological phenomena were observed. These included segmental thickening and curving, wave-like processing, disarrangement, and irregular swelling. A few axons ruptured and intumesced into retraction balls. Immunohistochemical MBP staining showed enlargement and curving of spaces between the myelin sheaths and axons in certain areas. The myelin sheaths lining the surfaces of the axons were in some cases incomplete and even exfoliated, and segmentation disappeared. These pathological changes increased in severity over time (P < 0.05). These histopathological changes may prove beneficial to the pathological diagnosis of PBSI during autopsy. The measurement of axon diameters provides a referent quantitative index

  14. Antigenic cartography of H1N1 influenza viruses using sequence-based antigenic distance calculation.

    Science.gov (United States)

    Anderson, Christopher S; McCall, Patrick R; Stern, Harry A; Yang, Hongmei; Topham, David J

    2018-02-12

    The ease at which influenza virus sequence data can be used to estimate antigenic relationships between strains and the existence of databases containing sequence data for hundreds of thousands influenza strains make sequence-based antigenic distance estimates an attractive approach to researchers. Antigenic mismatch between circulating strains and vaccine strains results in significantly decreased vaccine effectiveness. Furthermore, antigenic relatedness between the vaccine strain and the strains an individual was originally primed with can affect the cross-reactivity of the antibody response. Thus, understanding the antigenic relationships between influenza viruses that have circulated is important to both vaccinologists and immunologists. Here we develop a method of mapping antigenic relationships between influenza virus stains using a sequence-based antigenic distance approach (SBM). We used a modified version of the p-all-epitope sequence-based antigenic distance calculation, which determines the antigenic relatedness between strains using influenza hemagglutinin (HA) genetic coding sequence data and provide experimental validation of the p-all-epitope calculation. We calculated the antigenic distance between 4838 H1N1 viruses isolated from infected humans between 1918 and 2016. We demonstrate, for the first time, that sequence-based antigenic distances of H1N1 Influenza viruses can be accurately represented in 2-dimenstional antigenic cartography using classic multidimensional scaling. Additionally, the model correctly predicted decreases in cross-reactive antibody levels with 87% accuracy and was highly reproducible with even when small numbers of sequences were used. This work provides a highly accurate and precise bioinformatics tool that can be used to assess immune risk as well as design optimized vaccination strategies. SBM accurately estimated the antigenic relationship between strains using HA sequence data. Antigenic maps of H1N1 virus strains reveal

  15. Immunohistochemical visualization of neurons and specific glial cells for stereological application in the porcine neocortex

    DEFF Research Database (Denmark)

    Lyck, Lise; Jelsing, Jacob; Jensen, Pia Søndergaard

    2006-01-01

    described. Therefore, to facilitate future stereological studies of the neuronal and glial cell populations in experimental neurological diseases in the pig, we established a battery of immunohistochemical protocols for staining of perfusion fixed porcine brain tissue processed as free floating cryostat......The pig is becoming an increasingly used non-primate model in basic experimental studies of human neurological diseases. In spite of the widespread use of immunohistochemistry and cell type specific markers, the application of immunohistochemistry in the pig brain has not been systematically...... in identification of the individual cells, and for penetration of the staining and maintenance of section thickness above 25 microm, necessary for stereological cell counting. In the cases of NeuN, CNPase, CD11b and Ki67 the staining met the demands to be applicable in stereological analyses using the optical...

  16. Detection of Rabies antigen in brains of suspected Rabid dogs ...

    African Journals Online (AJOL)

    Objective: To detect the presence of rabies antigen in brains of suspected rabid dogs. Materials and Methods: Ninety six (96) brain specimens from suspected rabid dogs were examined for the presence of rabies antigen using Seller's staining technique and enzyme immunoassay. Results: The two techniques were both ...

  17. Tissue distribution of histo-blood group antigens

    DEFF Research Database (Denmark)

    Ravn, V; Dabelsteen, Erik

    2000-01-01

    The introduction of immunohistochemical techniques and monoclonal antibodies to specific carbohydrate epitopes has made it possible to study in detail the tissue distribution of histo-blood group antigens and related carbohydrate structures. The present paper summarizes the available data...... concerning the histological distribution of histo-blood group antigens and their precursor structures in normal human tissues. Studies performed have concentrated on carbohydrate antigens related to the ABO, Lewis, and TTn blood group systems, i.e. histo-blood group antigens carried by type 1, 2, and 3 chain...... carrier carbohydrate chains. Histo-blood group antigens are found in most epithelial tissues. Meanwhile, several factors influence the type, the amount, and the histological distribution of histoblood group antigens, i.e. the ABO, Lewis, and saliva-secretor type of the individual, and the cell- and tissue...

  18. Tissue distribution of histo-blood group antigens

    DEFF Research Database (Denmark)

    Ravn, V; Dabelsteen, Erik

    2000-01-01

    carrier carbohydrate chains. Histo-blood group antigens are found in most epithelial tissues. Meanwhile, several factors influence the type, the amount, and the histological distribution of histoblood group antigens, i.e. the ABO, Lewis, and saliva-secretor type of the individual, and the cell- and tissue......The introduction of immunohistochemical techniques and monoclonal antibodies to specific carbohydrate epitopes has made it possible to study in detail the tissue distribution of histo-blood group antigens and related carbohydrate structures. The present paper summarizes the available data...... concerning the histological distribution of histo-blood group antigens and their precursor structures in normal human tissues. Studies performed have concentrated on carbohydrate antigens related to the ABO, Lewis, and TTn blood group systems, i.e. histo-blood group antigens carried by type 1, 2, and 3 chain...

  19.  Immunohistochemical Expression of ki-67 and p53 in Colorectal Adenomas: A Clinicopathological Study

    Directory of Open Access Journals (Sweden)

    Hussam Hasson Ali

    2011-07-01

    Full Text Available  Objectives: To evaluate the significance of P53 and Ki-67 expression as immunohistochemical markers in early detection of premalignant changes in different types of colorectal adenomas. Also, to correlate immunohistochemical expression of the two markers with different clinicopathological parameters including; age, and sex of the patient, type, site, size and grade of dysplasia of colorectal adenomas.Methods: Forty-seven polypectomy specimens of colorectal adenomas were retrieved from the archival materials of the Gastrointestinal and Hepatic Diseases Teaching Hospital in Baghdad from 2009 - 2010. Four µm section specimens were stained by immunohistochemical technique with Ki-67 and P53 tumor markers. P-values <0.05 were considered statistically significant.Results: Immunohistochemical expressions of Ki-67 and P53 had a significant correlation with the size and grade of dysplasia in colorectal adenomas. However, there was no significant correlation among the immunohistochemical expression of Ki-67 and P53 with the age and gender of the patient, and the type and site of colorectal adenomas. There was no significant correlation between Ki-67 and P53 expressions in colorectal adenomas. Villous adenomas of colorectum showed a significant correlation with the grade of dysplasia, while there was no significant correlation between size and site of colorectal adenoma with the grade of dysplasia.Conclusion: High grade dysplasia with significant positive immunohistochemical markers of Ki-67 and P53 could be valuable parameters for selecting from the total colorectal adenoma population, those most deserving of close surveillance in follow-up cancer prevention programs. It is closely linked with increasing age particularly in patients with a large size adenoma of villous component in their histology.

  20. Accelerated staining technique using kitchen microwave oven

    Directory of Open Access Journals (Sweden)

    Archana Mukunda

    2015-01-01

    Full Text Available Introduction: Histopathological diagnosis of specimens is greatly dependent on good sample preparation and staining. Both of these processes is governed by diffusion of fluids and dyes in and out of the tissue, which is the key to staining. Diffusion of fluids can be accelerated by the application of heat that reduces the time of staining from hours to the minute. We modified an inexpensive model of kitchen microwave oven for staining. This study is an attempt to compare the reliability of this modified technique against the tested technique of routine staining so as to establish the kitchen microwave oven as a valuable diagnostic tool. Materials and Methods: Sixty different tissue blocks were used to prepare 20 pairs of slides for 4 different stains namely hematoxylin and eosin, Van Gieson′s, 0.1% toluidine blue and periodic acid-Schiff. From each tissue block, two bits of tissues were mounted on two different slides. One slide was stained routinely, and the other stained inside a microwave. A pathologist evaluated the stained slides and the results so obtained were analyzed statistically. Results: Microwave staining considerably cut down the staining time from hours to seconds. Microwave staining showed no loss of cellular and nuclear details, uniform-staining characteristics and was of excellent quality. Interpretation and Conclusion: The cellular details, nuclear details and staining characteristics of microwave stained tissues were better than or equal to the routine stained tissue. The overall quality of microwave-stained sections was found to be better than the routine stained tissue in majority of cases.

  1. Immunohistochemical study of ki-67 and bcl-2 expression in some odontogenic cystic lesions with different clinical behaviors

    Directory of Open Access Journals (Sweden)

    Seyed Hossein Tabatabaei

    2016-11-01

    Full Text Available Background: Cystic lesions with odontogenic epithelial origin and similar clinicoradiographic appearance, show different clinical behaviors. Objective: To compare some factors related to cell proliferation and escape from apoptosis in epithelium covering two groups of odontogenic cystic lesions with different clinical behaviors. Methods: In this cross-sectional study 11 paraffin-embedded samples were selected of each lesions radicular cyst, dentigerous cyst, odontogenic keratocyst, and unicystic ameloblastoma. The sample underwent immunohistochemical staining for investigating the expression of ki-67 antigen and bcl-2 protein. Data analyzed with SPSS17 software and Kruskal–Wallis and chi-square statistical tests. Findings: Most of ki-67 positive cells were observed in parabasal layer of odontogenic keratocyst [35.50±26.29%; P=0.001]. The average of ki-67-LI was more in parabasal layer of aggressive group (26.80±37.79% compared to non-aggressive group (4.04±3.38%, was not being statistically significant. The highest average of bcl-2-LI was 95±6.70% in basal layer of odontogenic keratocyst (P=0.001. In all layers, the average of bcl-2-LI was more in aggressive lesions compared to non-aggressive ones and the highest amount was found in basal layer (72.45±3.94×10% which was statistically significant (P=0.001. Conclusion: According to the results of this study, more expression of the markers related to escape from apoptosis in aggressive lesions group compared to non-aggressive group, suggests that escape from apoptosis had a more critical role in aggressive behavior of odontogenic cystic lesions.

  2. Germinated brown rice and its bioactives modulate the activity of uterine cells in oophorectomised rats as evidenced by gross cytohistological and immunohistochemical changes.

    Science.gov (United States)

    Muhammad, Sani I; Ismail, Maznah; Mahmud, Rozi B; Salisu, Abubakar M; Zakaria, Zuki A

    2013-07-30

    Germinated brown rice (GBR) is gaining momentum in the area of biomedical research due to its increased use as a nutraceutical for the management of diseases. The effect of GBR on the reproductive organs of oophorectomised rats was studied using the gross, cytological, histological and immunohistochemical changes, with the aim of reducing atrophy and dryness of the genital organs in menopause. Experimental rats were divided into eight groups of six rats per group. Groups 1, 2 and 3 (sham-operated (SH), oophorectomised without treatment (OVX) and oophorectomised treated with 0.2 mg/kg oestrogen, respectively) served as the controls. The groups 4,5,6,7 and 8 were treated with 20 mg/kg Remifemin, 200 mg/kg of GBR, ASG, oryzanol and GABA, respectively. All treatments were administered orally, once daily for 8 weeks. Vaginal smear cytology was done at the 7th week on all the rats. The weight and dimensions of the uterus and vagina were determined after sacrifice of the rats. Uterine and vaginal tissues were taken for histology and Immunohistochemical examinations. GBR and its bioactives treated groups significantly increased the weight and length of both the uterus and the vagina when compared to Oophorectomised non-treated group (OVX-non-treated) (p < 0.05). Significant changes were observed in the ratio of cornified epithelial cells and number of leucocytes in the vaginal cytology between the oophorectomised non-treated and treated groups. There was also an increase in the luminal and glandular epithelial cells activity in the treated compared with the untreated groups histologically. Immunohistochemical staining showed specific proliferating cell nuclear antigen (PCNA) in the luminal and glandular epithelium of the treated groups, which was absent in the OVX-non-treated group. GBR improved the length and weight of the uterus and also increased the number of glandular and luminal cells epithelia of the vagina. GBR and its bioactives could be a potential

  3. Histopathological Assessment and Immunohistochemical Study of Nasopharyngeal Low Grade MALT Lymphoma

    International Nuclear Information System (INIS)

    El-Hawary, A.K.

    2006-01-01

    Introduction: MALT lymphoma arises in a variety of body tissues, but most often in the stomach. Though relatively rare, these MALT lymphomas may arise within several sites in the head and neck, and often present diagnostic and therapeutic challenges. Immunohistochemical analysis are helpful in confirming the diagnosis between the MALT-lymphoma and the reactive lymphoid hyperplasia. MALT-type lymphoma demonstrated characteristic negative staining for CD3, CD5 and CD43, positive staining for CD20, and monotypic staining for either kappa or lambda light chain immunoglobulin markers, whereas reactive lymphoid hyperplasia all expressed Band T cell markers. Material and Methods: 41 cases of nasopharyngeal masses were obtained from the files at pathology department, Mansoura Faculty of Medicine through the period from 2002 till 2006. 31 cases were corresponded histomorphologically to low-grade B-cell lymphoma of mucosa associated lymphoid tissue (MALT) type and 10 patients with reactive lymphoid hyperplasia of the adenoid. Hematoxylin-eosin-stained slides were reviewed to confirm the diagnosis. Immunohistochemical studies were performed on formalin-fixed, paraffin-embedded sections using the labeled streptavidin-biotin-peroxidase complex method with DAB as chromogen. The following antibodies were evaluated CD20, CD3, Kappa, lambda and cytokeratin antibodies. Results: All cases of low grade MALT lymphoma show Iymphoepitheliallesion and proliferation of centrocyte like cells. 14 cases (45.1 %) show subepithelial plasma cells. Dutcher bodies were demonstrated in 10 cases (32.2%). Monocytoid B-cells were seen in 12 cases (38.7%). Six (60%) out of the ten cases of adenoids show transmigrating lymphocyte without formation of lymphoepithelial lesion. All cases with MALT-type lymphoma expressed CD20 and not CD3 whereas 10 cases of adenoid, all expressed Band T cell markers. Immunohistochemical staining showed that 31 cases of low grade MALT lymphoma were positive for immunoglobin

  4. Epitheliocystis infection in cultured white sturgeon (Acipenser transmontanus): antigenic and ultrastructural similarities of the causative agent to the chlamydiae.

    Science.gov (United States)

    Groff, J M; LaPatra, S E; Munn, R J; Anderson, M L; Osburn, B I

    1996-04-01

    A mild to moderate branchial epitheliocystis infection was diagnosed in subyearling (11 months old, 250-300 g) white sturgeon (Acipenser transmontanus) from a private culture facility with a 4-8% mortality in the population. Infected branchial epithelial cells contained the coccoid to coccobacillary epitheliocystis organisms, which appeared as cytoplasmic inclusions composed of a fine, homogeneous, dense, basophilic, granular material. The infected cells were variably enlarged with spherical to oval profiles and were randomly distributed throughout the branchial epithelium. The cytoplasmic inclusions stained positive with Macchiavello stain but negative with Brown and Brenn, periodic acid-Schiff, and Gimenez stains. Expression of chlamydial antigen was demonstrated within the cytoplasmic inclusions using a standard peroxidase-antiperoxidase immunohistochemical technique. Three stages of coordinated intracellular development were recognized by electron microscopy. The reticulate bodies were oval to spherical and 0.4-0.8 x 0.5-1.4 microns but often exhibited a pleomorphic and convoluted appearance because of variable membrane invaginations and evaginations suggestive of uneven fission and budding. Separate host cells contained intermediate bodies that were spherical to oval and 0.2-0.4 x 0.3-0.6 microns although often observed in the process of apparent uneven division. The presence of a cap or plaque composed of hexagonally arrayed fibrillar surface projections was initially recognized in this stage. A homogeneous population of 0.3-0.4 microns oval elementary bodies were observed separately in individual host cells. This developmental stage had a single, dense, compact, eccentrically located cytoplasmic condensation that occurred opposite to the location of the cap of hexagonally arrayed fibrillar surface projections. Morphologic characteristics of the epitheliocystis organism in these white sturgeon were similar to those previously described in other teleosts and

  5. Microdissection of stained archival tissue.

    Science.gov (United States)

    Gupta, S K; Douglas-Jones, A G; Morgan, J M

    1997-08-01

    In many tissues the preinvasive stage of neoplastic progression can be identified histologically as dysplasia or in situ disease. There is much interest in defining the molecular events associated with the early stages of neoplasia. Retrieval of histologically recognisable preinvasive neoplastic tissue uncontaminated by inflammatory or stromal cells is important for genetic studies using polymerase chain reaction (PCR) assay. A novel method for microdissection is described in which 10 microns sections are dewaxed, stained with haematoxylin and eosin, dried, covered with Sellotape, and the tissue cut out using a scalpel blade under direct visual control. The method is quick, eliminates problems of operator tremor, preserves the architecture of the micro-dissected tissue (for photographic documentation) and requires no special equipment. The presence of Sellotape and adhesive in the reaction mixture has no detrimental effect on the ability to extract DNA or to perform PCR.

  6. A Research of Pyogenic Granuloma Genesis Factor With Immunohistochemical Analysis.

    Science.gov (United States)

    Park, Si Hyun; Lee, Jun Ho; Tak, Min Sung; Lee, Hyun Ju; Choi, Hwan Jun

    2017-11-01

    Pyogenic granuloma (PG) is a type of vascular tumor for which the growth mechanism is poorly understood. Estrogen and progesterone may influence vascular malformations by increasing neovascularization in the lesions. Pregnancy tumor is a term for PG that occurs on the gingival mucosa of pregnant women in response to local irritation or injury. The etiology and pathogenesis of this phenomenon are not fully understood. Hormonal imbalance has been hypothesized to be responsible for the development of gingival hyper-reactive inflammatory responses. Moreover, it has been shown in vitro that the female sex hormone is a potential regulator of the production of several growth factors, such as vascular endothelial growth factor (VEGF), basic fibroblast growth factor, and nerve growth factor, in various cell types. Epidermal growth factor receptor (EGFR) is also involved in a signaling cascade that influences proliferation and other tumor-promoting activities, as well as the responsiveness to chemotherapy. The aim of this study was to examine the relationship between PG pathogenesis and hormone imbalance in 21 patients. All specimens were analyzed by immunohistochemical staining with hematoxylin and eosin for the following hormones: estrogen receptor, progesterone receptor, VEGF, and EGFR. The analysis of the specimens showed that estrogen receptor and EGFR were not associated with PG, while VEGF was statistically related to PG. In addition, there was no significantly difference between sex, tumor location, or pregnancy. There are few studies about correlation between the pathogenesis of PG and sex hormones or growth factors demonstrated via immunohistochemical analysis. The results of this study indicate that estrogen and progesterone do not influence the pathogenesis of PG; however, VEGF may be associated with the pathogenesis of PG.

  7. [Diagnostic stain of helminth eggs (author's transl)].

    Science.gov (United States)

    Cerva, L

    1976-12-01

    A description is given of a diagnostic method for the staining of eggs and larvae of intestinal helminth in smears of both fresh and fixed stool samples. The contents of the eggs and larvae stain red, the background various shades of blue. The most contrasting staining was obtained with thin-walled eggs.

  8. The distribution of blood group antigens in experimentally produced carcinomas of rat palate

    DEFF Research Database (Denmark)

    Reibel, J; Philipsen, H P; Fisker, A V

    1986-01-01

    palate induced by a chemical carcinogen (4NQO). The H antigen, normally expressed on spinous cells in rats, was absent in malignant epithelium, whereas staining for the B antigen, normally expressed on basal cells, was variable. These changes are equivalent to those seen in human squamous cell carcinomas....... The blood group antigen staining pattern in experimentally produced verrucous carcinomas showed an almost normal blood group antigen expression. This may have diagnostic significance. Localized areas of hyperplastic palatal epithelium with slight dysplasia revealed loss of H antigen and the presence of B...

  9. Enhanced detection of lymphovascular invasion in small rectal neuroendocrine tumors using D2-40 and Elastica van Gieson immunohistochemical analysis.

    Science.gov (United States)

    Kitagawa, Yoshiyasu; Ikebe, Dai; Hara, Taro; Kato, Kazuki; Komatsu, Teisuke; Kondo, Fukuo; Azemoto, Ryousaku; Komoda, Fumitake; Tanaka, Taketsugu; Saito, Hirofumi; Itami, Makiko; Yamaguchi, Taketo; Suzuki, Takuto

    2016-11-01

    Rectal neuroendocrine tumor (RNET) lymphovascular invasion (LVI) is regarded as an important predictor of nodal metastasis after endoscopic resection (ER). However, little is known about the frequency of immunohistochemical detection of LVI in RNETs. This study was performed to establish the actual detection of LVI rate in RNETs ≤10 mm and to evaluate associated clinical outcomes. We retrospectively reviewed the records for 98 consecutive patients treated by ER with a total of 102 RNETs ≤10 mm. Tissue sections were labeled with hematoxylin-eosin (HE) stain, the D2-40 monoclonal antibody to evaluate lymphatic invasion, and Elastica van Gieson (EVG) stain to detect venous invasion. LVI detection rate by HE versus immunohistochemical analysis was compared. Follow-up findings and clinical outcomes were also evaluated for 91 patients who were followed for ≥12 months. Lymphatic and venous invasion were detected using HE staining alone in 6.9% and 3.9% of patients, respectively, whereas they were detected using D2-40 and EVG staining in 20.6% and 47.1% of the patients, respectively. Thus, the LVI detection frequency using D2-40 and EVG staining (56.9%) was significantly higher than with HE (8.8%). Two out of seven patients who required additional surgery had regional lymph node metastases. However, among the 84 patients who were followed up without surgery, no distant metastases or recurrences were detected. Compared with HE staining, immunohistochemical analysis significantly increased the frequency of LVI detection in RNETs ≤10 mm. However, the clinical impact of LVIs detected using immunohistochemical analysis remains unclear. Clarification of the actual role of LVI using immunohistochemical analysis requires a patient long-term follow-up and outcomes. © 2016 The Authors. Cancer Medicine published by John Wiley & Sons Ltd.

  10. Immunohistochemical analysis of collagen expression in uterine leiomyomata during the menstrual cycle

    Science.gov (United States)

    IWAHASHI, MASAAKI; MURAGAKI, YASUTERU; IKOMA, MAKOTO; MABUCHI, YASUSHI; KOBAYASHI, AYA; TANIZAKI, YUUKO; INO, KAZUHIKO

    2011-01-01

    To investigate the possible involvement of collagen in the characteristic features of human leiomyoma, type I, III and IV collagen expression was determined at the protein level in normal myometrium and leiomyoma tissues throughout the menstrual cycle. The tissues were obtained from 40 pre-menopausal women (29–53 years of age) at various stages of the menstrual cycle who were undergoing abdominal hysterectomy for symptomatic uterine leiomyoma. Immunohistochemical staining was performed with specific monoclonal antibodies against type I, III and IV collagen in the leiomyoma and the myometrial tissues. Immunohistochemical analysis revealed that type I collagen expression was increased in the leiomyoma tissues at the protein level as compared to that in the normal myometrium tissues throughout the menstrual cycle. These results suggest that increased expression of type I collagen plays a key role in the pathogenesis of uterine leiomyoma. PMID:22977499

  11. Immunohistochemical and quantitative changes in salivary EGF, amylase and haptocorrin following radiotherapy for oral cancer

    DEFF Research Database (Denmark)

    Christensen, M E; Hansen, H S; Poulsen, Steen Seier

    1996-01-01

    Epidermal growth factor (EGF), amylase and haptocorrin are molecules produced in the salivary glands. The aim of the present study was to determine immunohistochemical and quantitative alterations in EGF as compared with haptocorrin and amylase following radiotherapy for oral cancer. Changes...... in the salivary secretion of EGF are of interest because of the importance of EGF in mucosal regeneration. Immunohistochemical studies on normal tissue from parotid and submandibular glands have demonstrated EGF in the serous acini with a tendency to single cell expression in the parotid gland. Amylase has been...... found in the serous acini of both the submandibular and parotid glands. Haptocorrin was localized in the duct system of both glands. In the submandibular glands with radiotherapy induced sialoadenitis only very few acini with weak or no staining for EGF and amylase were demonstrated, while no changes...

  12. Immunohistochemical testing for Helicobacter Pylori existence in neoplasms of the colon

    Directory of Open Access Journals (Sweden)

    Yasar Nurgul

    2008-08-01

    Full Text Available Abstract Background Helicobacter pylori is a common pathogen, and its prevalence varies with socioeconomic conditions (10–80%. It has recently been recognized as a class I carcinogen in relation to gastric cancer. The aim of this study was to investigate the presence of Helicobacter pylori in neoplasms of the colon by immunohistochemical methods. Methods The polypectomy materials of 51 patients (19 male and 32 female who had undergone colonoscopic polypectomy were retrieved for retrospective examination. The endoscopic size and colonic localization of the polyps were recorded. Hematoxylin and eosin stains were evaluated according to histological type and grade of dysplasia. Biopsy stains were immunohistochemically treated with Helicobacter pylori antibodies by the streptavidine-biotin immunoperoxidase technique. Helicobacter pylori staining in the gastric mucosa was used as the control for the immunohistochemical method. Specimens were classified according to the presence of Helicobacter pylori under an optical microscope, and Helicobacter pylori positive specimens were stratified according to the respective staining pattern. Results Mean age was 61.88 ± 10.62 (40–82 years. Polyp sizes were 1.45 ± 0.92 (1–4 cm; and 25.5% of polyps were localized in the right colon, 68.6% in the left colon and 5.9% in the transverse colon. Presence of Helicobacter pylori was not correlated with localization (p > 0.05 or size of the polyps (p > 0.05. Eleven (21.6% of all specimens included in the study were Helicobacter pylori positive by immunohistochemical methods. Of the Helicobacter pylori positive specimens, the staining pattern was diffuse: Equivocal in 90.9%, nonspecific with a finely granular type concentrated on the luminal surface in 90.9%, dot-like granular in 54.5%, and spiral in 9.1%. Of the tubular polyps, 17.9% were H. pylori positive, and the staining pattern was equivocal in 100%, luminal in 85.7%, and dot-like granular in 57.1%. Of the

  13. The distribution of blood group antigens in experimentally produced carcinomas of rat palate

    DEFF Research Database (Denmark)

    Reibel, J; Philipsen, H P; Fisker, A V

    1986-01-01

    It has been shown previously that rat oral epithelia express antigens cross-reacting with antibodies against human blood group antigen B and its structural precursor, the H antigen (Type 2 chain). In the present study we investigated the expression of these antigens in malignant changes in the rat....... The blood group antigen staining pattern in experimentally produced verrucous carcinomas showed an almost normal blood group antigen expression. This may have diagnostic significance. Localized areas of hyperplastic palatal epithelium with slight dysplasia revealed loss of H antigen and the presence of B...

  14. Automated immunohistochemical method to analyze large areas of the human cortex.

    Science.gov (United States)

    Abbass, Mohamad; Trought, Kathleen; Long, David; Semechko, Anton; Wong, Albert H C

    2018-01-15

    There have been inconsistencies in the histological abnormalities found in the cerebral cortex from patients with schizophrenia, bipolar disorder and major depression. Discrepancies in previously published reports may arise from small sample sizes, inconsistent methodology and biased cell counting. We applied automated quantification of neuron density, neuron size and cortical layer thickness in large regions of the cerebral cortex in psychiatric patients. This method accurately segments DAPI positive cells that are also stained with CUX2 and FEZF2. Cortical layer thickness, neuron density and neuron size were automatically computed for each cortical layer in numerous Brodmann areas. We did not find pronounced cytoarchitectural abnormalities in the anterior cingulate cortex or orbitofrontal cortex in patients with schizophrenia, bipolar disorder or major depressive disorder. There were no significant differences in layer thickness measured in immunohistochemically stained slides compared with traditional Nissl stained slides. Automated cell counts were correlated, reliable and consistent with manual counts, while being much less time-consuming. We demonstrate the validity of using a novel automated analysis approach to post-mortem brain tissue. We were able to analyze large cortical areas and quantify specific cell populations using immunohistochemical markers. Future analyses could benefit from efficient automated analysis. Copyright © 2017 Elsevier B.V. All rights reserved.

  15. Immunohistochemical Detection of p75 Neurotrophin Receptor (p75-NTR) in Follicular and Plexiform Ameloblastoma

    Science.gov (United States)

    Madhavan, Nirmal Ramadas; Mohan, Sunil Paramel; Kumar, Srichinthu Kenniyan

    2016-01-01

    Introduction Ameloblastoma holds a unique position among benign tumours by its locally destructive and invasive nature. Recently improvised molecular techniques helped researchers to unravel the myth behind such biologic behaviour. Though interesting findings have been delivered, the rhythmic correlation regarding the exact mechanism still remains lacking. Neurotrophins and their receptor mediated pathways play a crucial role in survival, death and differentiation of many neuroectoderm derived cells. With this background, the study has been aimed to investigate the expression of p75-NTR (Neurotrophin Receptor) in follicular and plexiform ameloblastoma. Aim To analyze the immunohistochemical expression pattern of p75-NTR in ameloblastoma and to compare the immunohistochemical expression pattern of p75-NTR among the histological types of ameloblastoma, follicular and plexiform patterns. Materials and Methods Total 22 ameloblastomas (12 follicular, 10 plexiform) were immuno-stained with anti-human p75-NTR mouse IgG monoclonal antibody and the pattern of staining is statistically analyzed. Results Only 11 (10 follicular, 1 plexiform) out of 22 ameloblastomas showed immuno-reactivity to p75-NTR. In ameloblastoma, only the peripheral pre-ameloblast like tall columnar cells showed reactivity whereas the stellate reticulum-like cells were immuno-negative. The staining pattern was membranous in the immuno-reactive cells. The results were studied with the downstream pathways from the literature and a possible mechanism has been proposed. Conclusion The expression pattern of p75-NTR was found to be more in follicular ameloblastoma than plexiform. PMID:27656566

  16. Tetramer staining for the detection of HLA-specific B cells.

    Science.gov (United States)

    Lucas, Donna P; Leffell, Mary S; Zachary, Andrea A

    2013-01-01

    HLA-specific B cells can be identified, quantified, and isolated after staining with HLA tetramers. Quantification of these B cells can in turn identify individuals who are sensitized to HLA antigens and the isolation of these cells facilitates a variety of experimental investigations.

  17. Fluorescence microscopy is superior to polarized microscopy for detecting amyloid deposits in Congo red-stained trephine bone marrow biopsy specimens.

    Science.gov (United States)

    Marcus, Alan; Sadimin, Evita; Richardson, Maurice; Goodell, Lauri; Fyfe, Billie

    2012-10-01

    The classic gold standard for detecting amyloid deposits is Congo red-stained bright field and polarized microscopy (CRPM). A prior study showed that Congo red fluorescence (CRF) microscopy had increased sensitivity compared with traditional CRPM when analyzing fat pad specimens. The purpose of the current study was to determine the sensitivity of CRF for evaluating Congo red-stained bone marrow biopsy specimens, and to compare these results with those of CRPM. We compared the CRPM and the CRF analyses of 33 trephine bone marrow biopsy specimens with clinical or morphologic suspicion of amyloid deposits. These results were verified against immunohistochemical staining with anti-amyloid P antibody. CRF achieved 100% sensitivity, and CRPM achieved 75% sensitivity. Both groups showed 100% specificity compared with amyloid P immunohistochemical staining. The results show that CRF is a sensitive method to analyze trephine bone marrow biopsy specimens for amyloid deposits.

  18. Study of the Annexin A1 and Its Associations with Carcinoembryonic Antigen and Mismatch Repair Proteins in Colorectal Cancer.

    Science.gov (United States)

    Ydy, Lenuce Ribeiro Aziz; do Espírito Santo, Gilmar Ferreira; de Menezes, Ivana; Martins, Michelle Santos; Ignotti, Eliane; Damazo, Amílcar Sabino

    2016-03-01

    Annexin-A1 (ANXA1) has been implicated in various tumor types, but few studies have investigated its involvement in colorectal cancer. The study aimed to analyze ANXA1 expression in the normal margin and colorectal tumor tissues of 104 patients who underwent surgery for colorectal cancer and to associate the ANXA1 expression with predictive clinicopathological variables. Hematoxylin-eosin and immunohistochemical staining were used for the analysis. ANXA1 expression was higher in colorectal cancer than in normal margin tissue (p = 0.0001). However, no differences were observed when we analyzed the ANXA1 expression in colon and rectal tumors (p = 0.830). Also, this protein positivity was associated with increased carcinoembryonic antigen levels (p = 0.004). Our data in the DNA-mismatch repair proteins expression was in accordance to the literature. And their positivity was not associated with ANXA1 presence in colorectal cancer. The high incidence of ANXA1 positive expression in colorectal cancer and its association with carcinoembryonic antigen levels might indicate the importance of this protein in the colorectal cancer biology.

  19. Immunohistochemical evaluation of iron accumulation in term ...

    African Journals Online (AJOL)

    Classical immunohistochemical studies on placenta have shown that there is a linear increase in iron storage in the placenta in the first half of a normal pregnancy, however, these stocks are decreased in normal 3rd trimester placenta. Iron accumulation in term placentas of preeclamptic and normal pregnancies were ...

  20. Experimental Acanthamoeba keratitis: II. Immunohistochemical evaluation.

    Science.gov (United States)

    Larkin, D. F.; Easty, D. L.

    1991-01-01

    In a Wistar rat experimental model of Acanthamoeba keratitis immunohistochemical techniques were used to analyse the host cellular response. The inflammatory cell profile was observed to change at intervals. In tissue sections the cellular response consisted of neutrophils on the first day but predominantly macrophages on the following days. Some T lymphocytes but no B lymphocytes were observed. Images PMID:1854696

  1. Immunohistochemical assessment of oestrogen and progesterone receptors

    DEFF Research Database (Denmark)

    Grabau, D A; Thorpe, S M; Knoop, A

    2000-01-01

    Two different methods to determine steroid receptors were analysed with respect to their ability to estimate prognosis in primary breast cancer patients. The immunohistochemical assay (IHA) was compared with the dextran-coated charcoal (DCC) method of receptor determination. A random sample of 281...

  2. A morphological and immunohistochemical evaluation of gastric ...

    African Journals Online (AJOL)

    Background: Gastric resections for carcinoma are common, but gastric carcinoma in South Africa, and particularly within the Western Cape province, has not been well documented. Method: The objective of the study was to immunohistochemically evaluate HER2/ neu overexpression, determine aberrations in β-catenin and ...

  3. Histological and immunohistochemical evaluation of sentinel lymph ...

    African Journals Online (AJOL)

    Histological and immunohistochemical evaluation of sentinel lymph nodes in breast cancer at a tertiary hospital in the Western Cape, South Africa. ... To determine effective histological examination of sentinel lymph node (SLN) sections for the detection of metastatic breast carcinoma. Methods. A prospective hospital-based ...

  4. Immunohistochemical localization of choline acetyltransferase during development and in Chats mutants of Drosophila melanogaster.

    Science.gov (United States)

    Gorczyca, M G; Hall, J C

    1987-05-01

    The distribution of choline acetyltransferase (CAT) in the nervous system of Drosophila melanogaster was determined by indirect immunohistochemical procedures using a monoclonal antibody specific to the enzyme. Immunoreactivity was first detected in the nervous system of 16 hr embryos, and increased considerably by the end of embryogenesis. Neuropil was preferentially stained, though cell bodies could also be observed. Staining was prominent in the CNS of all 3 larval instars but decreased substantially during the mid-pupal stage. Prior to eclosion, the level of immunoreactivity increased and the adult staining pattern became discernible. In the adult brain, staining was extensive, with numerous structures, such as the optic lobes and mushroom bodies, staining strongly. The adult thoracic ganglia were also moderately immunoreactive. These results imply a wide distribution of cholinergic neurons in the CNS of Drosophila. Immunoreactivity was also determined for 2 temperature-sensitive CAT mutants, Chats1 and Chats2. These files exhibit reduced CAT activity at permissive temperature, 18 degrees C, which eventually falls to undetectable levels after incubation at nonpermissive temperature, 30 degrees C. Chats2 mutants, after incubation at either 18 or 30 degrees C displayed virtually no staining. This result indicated that the immunoreactivity observed in wild-type flies was specifically associated with the enzyme encoded by the Cha gene. The intensity of staining in Chats1 mutants incubated at 18 degrees C appeared greater than in control flies, even though CAT enzyme activity in Chats1 is lower. This suggests that the enzyme molecule itself is structurally altered in Chats1 mutants. After incubation at 30 degrees C, staining in Chats1 flies decreased but did not disappear.

  5. Histological stain evaluation for machine learning applications

    Directory of Open Access Journals (Sweden)

    Jimmy C Azar

    2013-01-01

    Full Text Available Aims: A methodology for quantitative comparison of histological stains based on their classification and clustering performance, which may facilitate the choice of histological stains for automatic pattern and image analysis. Background: Machine learning and image analysis are becoming increasingly important in pathology applications for automatic analysis of histological tissue samples. Pathologists rely on multiple, contrasting stains to analyze tissue samples, but histological stains are developed for visual analysis and are not always ideal for automatic analysis. Materials and Methods: Thirteen different histological stains were used to stain adjacent prostate tissue sections from radical prostatectomies. We evaluate the stains for both supervised and unsupervised classification of stain/tissue combinations. For supervised classification we measure the error rate of nonlinear support vector machines, and for unsupervised classification we use the Rand index and the F-measure to assess the clustering results of a Gaussian mixture model based on expectation-maximization. Finally, we investigate class separability measures based on scatter criteria. Results: A methodology for quantitative evaluation of histological stains in terms of their classification and clustering efficacy that aims at improving segmentation and color decomposition. We demonstrate that for a specific tissue type, certain stains perform consistently better than others according to objective error criteria. Conclusions: The choice of histological stain for automatic analysis must be based on its classification and clustering performance, which are indicators of the performance of automatic segmentation of tissue into morphological components, which in turn may be the basis for diagnosis.

  6. Immunohistochemical characterization and evaluation of prognostic factors in canine oral melanomas with osteocartilaginous differentiation.

    Science.gov (United States)

    Sánchez, J; Ramirez, G A; Buendia, A J; Vilafranca, M; Martinez, C M; Altimira, J; Navarro, J A

    2007-09-01

    Melanomas are the most common malignant oral neoplasm in dogs. Osteocartilaginous differentiation in oral melanomas is a rare feature described both in veterinary and human medicine. Here, 10 cases of this type of neoplasm were used to study their immunohistochemical, biological, and clinical characteristics. Reactivity for S100 and melan A antigen was evaluated, and 4 prognosis factors (mitotic index, invasiveness of epithelium, nuclear atypia, and proliferation index) were analyzed and correlated with the clinical course of the neoplasms after diagnosis. Immunohistochemical analysis of the studied neoplasms, including the osteocartilaginous areas, showed positive immunoreaction for S100 and melan A, except in one dog, which was negative for melan A. Analysis of the results showed that oral melamonas with osteocartilaginous differentiation have a clinical course similar to that of other melanomas in the oral cavity. Analysis of the mitotic index and the expression of proliferation marker Ki-67 could be useful tools for predicting the biological behavior of these neoplasms.

  7. Eruptive vellus hair cysts: report of a new case with immunohistochemical study and literature review.

    Science.gov (United States)

    Zaharia, Daniela; Kanitakis, Jean

    2012-01-01

    Eruptive vellus hair cysts (EVHC) are rather uncommon lesions, of which 222 cases have been published in the literature. Their etiopathogenesis is poorly known. We report herein a new typical case of EVHC that was studied immunohistochemically. A 15-year-old male presented with a 4-year history of progressively developing small brown-gray papules on the trunk and extremities. Microscopically the lesions consisted of small epidermoid cysts containing vellus hairs. Immunohistochemically, the lesions expressed keratin 1/10, calretinin and p63 but no epithelial membrane antigen, filaggrin or androgen receptors. A review of the relevant literature shows that EVHC may be inherited or acquired and may be associated to other genodermatoses, namely sebocystomatosis. They could be due to hamartomatous follicular growth, to a trouble in infundibular keratinization leading to vellus hair follicle occlusion, or represent an example of acquired hamartoma. Although benign, this condition is difficult to treat. Copyright © 2012 S. Karger AG, Basel.

  8. Immunohistochemical characterisation of the local immune response in azoxymethane-induced colon tumours in the BDIX inbred rat strain

    DEFF Research Database (Denmark)

    Kobæk Larsen, Morten; Diederichsen, Axel Cosmus Pyndt; Agger, Ralf

    2004-01-01

    reaction of the submucosa below the tumour was evaluated in haematoxylin-eosin-stained tissue sections. Phenotypic characterization of leukocyte infiltration in the tumour tissue was performed by immunohistochemical staining using antibodies detecting various leukocyte subsets, i.e. T cells, natural killer...... cells, macrophages/monocytes, and dendritic cells. The results showed that the azoxymethane-induced colon tumours were strongly infiltrated by macrophages. Furthermore, the tumours showed a moderate degree of infiltrating CD4-positive cells. Very few natural killer, CD8-positive T cells and dendritic...

  9. Monoclonal antibodies to murine thrombospondin-1 and thrombospondin-2 reveal differential expression patterns in cancer and low antigen expression in normal tissues

    International Nuclear Information System (INIS)

    Bujak, Emil; Pretto, Francesca; Ritz, Danilo; Gualandi, Laura; Wulhfard, Sarah; Neri, Dario

    2014-01-01

    There is a considerable interest for the discovery and characterization of tumor-associated antigens, which may facilitate antibody-based pharmacodelivery strategies. Thrombospondin-1 and thrombospondin-2 are homologous secreted proteins, which have previously been reported to be overexpressed during remodeling typical for wound healing and tumor progression and to possibly play a functional role in cell proliferation, migration and apoptosis. To our knowledge, a complete immunohistochemical characterization of thrombospondins levels in normal rodent tissues has not been reported so far. Using antibody phage technology, we have generated and characterized monoclonal antibodies specific to murine thrombospondin-1 and thrombospondin-2, two antigens which share 62% aminoacid identity. An immunofluorescence analysis revealed that both antigens are virtually undetectable in normal mouse tissues, except for a weak staining of heart tissue by antibodies specific to thrombospondin-1. The analysis also showed that thrombospondin-1 was strongly expressed in 5/7 human tumors xenografted in nude mice, while it was only barely detectable in 3/8 murine tumors grafted in immunocompetent mice. By contrast, a high-affinity antibody to thrombospondin-2 revealed a much lower level of expression of this antigen in cancer specimens. Our analysis resolves ambiguities related to conflicting reports on thrombosponding expression in health and disease. Based on our findings, thrombospondin-1 (and not thrombospondin-2) may be considered as a target for antibody-based pharmacodelivery strategies, in consideration of its low expression in normal tissues and its upregulation in cancer. - Highlights: • High affinity monoclonal antibodies to murine and human TSP1 and 2 were raised. • Both antigens are virtually undetectable in normal mouse tissues. • Strong positivity of human tumor xenografts for TSP1 was detected. • Study revealed much lower level of TSP2 expression in cancer specimens

  10. Monoclonal antibodies to murine thrombospondin-1 and thrombospondin-2 reveal differential expression patterns in cancer and low antigen expression in normal tissues

    Energy Technology Data Exchange (ETDEWEB)

    Bujak, Emil [Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology (ETH Zürich), Vladimir-Prelog-Weg 2, CH-8093 Zurich (Switzerland); Pretto, Francesca; Ritz, Danilo; Gualandi, Laura; Wulhfard, Sarah [Philochem AG, Libernstrasse 3, CH-8112 Otelfingen (Switzerland); Neri, Dario, E-mail: neri@pharma.ethz.ch [Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology (ETH Zürich), Vladimir-Prelog-Weg 2, CH-8093 Zurich (Switzerland)

    2014-09-10

    There is a considerable interest for the discovery and characterization of tumor-associated antigens, which may facilitate antibody-based pharmacodelivery strategies. Thrombospondin-1 and thrombospondin-2 are homologous secreted proteins, which have previously been reported to be overexpressed during remodeling typical for wound healing and tumor progression and to possibly play a functional role in cell proliferation, migration and apoptosis. To our knowledge, a complete immunohistochemical characterization of thrombospondins levels in normal rodent tissues has not been reported so far. Using antibody phage technology, we have generated and characterized monoclonal antibodies specific to murine thrombospondin-1 and thrombospondin-2, two antigens which share 62% aminoacid identity. An immunofluorescence analysis revealed that both antigens are virtually undetectable in normal mouse tissues, except for a weak staining of heart tissue by antibodies specific to thrombospondin-1. The analysis also showed that thrombospondin-1 was strongly expressed in 5/7 human tumors xenografted in nude mice, while it was only barely detectable in 3/8 murine tumors grafted in immunocompetent mice. By contrast, a high-affinity antibody to thrombospondin-2 revealed a much lower level of expression of this antigen in cancer specimens. Our analysis resolves ambiguities related to conflicting reports on thrombosponding expression in health and disease. Based on our findings, thrombospondin-1 (and not thrombospondin-2) may be considered as a target for antibody-based pharmacodelivery strategies, in consideration of its low expression in normal tissues and its upregulation in cancer. - Highlights: • High affinity monoclonal antibodies to murine and human TSP1 and 2 were raised. • Both antigens are virtually undetectable in normal mouse tissues. • Strong positivity of human tumor xenografts for TSP1 was detected. • Study revealed much lower level of TSP2 expression in cancer specimens

  11. Standardization of Romanowsky stains. The relationship between stain composition and performance.

    Science.gov (United States)

    Marshall, P N; Bentley, S A; Lewis, S M

    1978-03-01

    A panel of 17 eminent haematologists has assessed the performance of 5 Romanowsky stains prepared from pure component dyes, comparing the suitability and acceptability of these stains for the preparation of routine blood and bone-marrow films. It was found that the results obtained using the stain described by Marshall et al (1975) were comparable to those obtained using a modification of the stain described by Wittekind et al (1976). The performance of the 3 other stains was less acceptable. Variations in stain formulation have been correlated with stain performance.

  12. Molecular cloning of canine Wilms? tumor 1 for immunohistochemical analysis in canine tissues

    OpenAIRE

    SAKAI, Osamu; SAKURAI, Masashi; SAKAI, Hiroki; KUBO, Masahito; HIRAOKA, Hiroko; BABA, Kenji; OKUDA, Masaru; MIZUNO, Takuya

    2017-01-01

    Wilms? tumor 1 (WT1) expression has been investigated in various human cancers as a target molecule for cancer immunotherapy. However, few studies have focused on WT1 expression in dogs. Firstly, cDNA of canine WT1 (cWT1) was molecularly cloned from normal canine kidney. The cross-reactivity of the anti-human WT1 monoclonal antibody (6F-H2) with cWT1 was confirmed via Western blotting using cells overexpressing cWT1. Immunohistochemical staining revealed that cWT1 expression was detected in a...

  13. Merkel Cell Carcinoma with Spontaneous Regression: A Case Report and Immunohistochemical Study

    Directory of Open Access Journals (Sweden)

    Hitoshi Terui

    2016-02-01

    Full Text Available Merkel cell carcinoma (MCC is an aggressive neuroendocrine carcinoma that only rarely regresses spontaneously. Since little is known about the immunological mechanisms involved in the spontaneous regression of MCC, we describe a case of MCC with spontaneous regression and employed immunohistochemical staining for cytotoxic and immunosuppressive molecules to investigate possible mechanisms involved in the spontaneous regression of MCC. Interestingly, compared to conventional MCC, tumor-infiltrating lymphocytes in MCC with spontaneous regression contained higher numbers of CD8+ cells and granulysin-bearing cells and lower numbers of CD206+ cells. Our present study suggests one of the possible reasons for the spontaneous regression of MCC.

  14. Immunohistochemical analysis of restenotic tissue after transjugular portosystemic shunt

    International Nuclear Information System (INIS)

    Lu Qin; An Yanli; Deng Gang; Fang Wen; Zhu Guangyu; Li Guozhao; Wei Xiaoying; Liu Yuanyuan; Teng Gaojun

    2005-01-01

    Objective: To investigate the changes of several restenotic tissue elements after transjugular portosystemic shunt, and to provide more informations for the mechanism of TIPS restenosis. Methods: TIPS was performed in 6 swine to set up TIPS animal models. 14-21 days after operation, the models were sacrificed to obtain the TIPS tissues for pathological examinations, including electric microscope, HE staining, and immunohistochemical staining of anti-SMC-actin-α, PCNA, Vementin, myoglobulin, eNOS and iNOS. Then , the results were comparatively analyzed between TIPS obstructed shunt tissues and non-obstructed shunt tissues. Results: Restenosis was occurred with different degrees in 4 swine of the 6 TIPS models. Electric microscopic results showed that the restenosis tissues were composed of over proliferated collagen, SMCs and fibroblasts. Anti-SMC-actin-α and PCNA were strongly positive expression in restenotic tissues, and also positive in patent tissues. Vimentin expressed strongly in unstenotic tissues, on the contrary, it expressed obviously weaker in restenotic tissues. Myoglobulin expressed more strongly in restenotic tissues and weakened in unstenotic tissues. eNOS expressed positive in normal liver tissues, and expressed weaker near TIPS restenotic tissues. iNOS showed stronger expression in restenotic tissues and could hardly expressed in normal liver tissues. Conclusions: Restenotic rate may be 67% in TIPS swine models. Restenotic tissues may be mainly composed of proliferated SMCs positively expressed anti-SMC-actin-α with strong ability of movement. eNOS may be expressed in normal liver tissues and instead iNOS be expressed in strongly injured liver tissues. (authors)

  15. Pediatric meningiomas an aggressive subset: A clinicopathological and immunohistochemical study

    Directory of Open Access Journals (Sweden)

    M Hui

    2015-01-01

    Full Text Available Background: Meningiomas are uncommon neoplasms in the pediatric age group and differ in various aspects from their adult counterparts. They account for 0.4-4.6% of all primary brain tumors. Aims: To retrospectively analyze the clinicopathological and immunohistochemical features of pediatric meningiomas. Materials and Methods: Meningiomas in patients under 18 years of age diagnosed between January 2001 to December 2011 were analyzed retrospectively. The hematoxylin and eosin stained sections and Ki 67 labelling index (LI were reviewed for all the cases Results: The pediatric meningiomas accounted for 1.52% of total meningiomas (15/983. The mean age at presentation was 12 years with male to female ratio of 1.5:1. The presenting symptoms were headache, seizures, and motor deficits. The histology included 9 cases (60% of atypical meningioma (WHO grade II followed by 4 cases (26.67% of WHO grade-I and 2 cases (13.33% of anaplastic meningioma (WHO grade III. Five cases had a recurrence. Ki67 LI ranged from 0.5% to 1.5% in grade I, 0.5% to 15% in grade II and 13% to 24% in grade III meningiomas. Conclusion: Meningiomas are rare in children and show a male preponderance. There was a higher incidence of atypical and anaplastic meningiomas in pediatric population.

  16. Oral fibrosarcoma in jararaca (Bothrops pubescens: anatomopathological and immunohistochemical aspects

    Directory of Open Access Journals (Sweden)

    Ezequiel D. Santos

    2015-07-01

    Full Text Available Abstract A 4-year-old female captive-bred snake of the genus Bothrops showed swelling on the left side of the oral cavity, suggesting the development of neoplasia. The mass was removed surgically and sent for pathological examination. Two months later a new increase in volume in the same site was observed, suggesting recurrence. The lesion was completely removed and sent for pathological analysis. Histologically, the two-samples consisted of a mass with highly-cell density composed of spindle-shaped anaplastic cells arranged in interwoven bundles, distributed throughout the tissue extension and, occasionally, polygonal cells arranged in irregular fascicles. The Masson trichrome staining showed modest amount of collagen supporting the neoplastic cells. PAS-positive content was not observed in the cytoplasm of neoplastic cells. Histological and histochemical findings indicated that it was a spindle cell neoplasm, but the classification was not possible. Immunohistochemistry was requested and performed using the streptavidin-biotin-peroxidase method. The markers used were anti-vimentin, anti-PCNA, anti-EMA, anti-melan A and anti-melanosome, anti-desmin, anti-actin, anti-CD68 and anti- S100protein. The neoplastic cells were immunoreactive for vimentin and PCNA and negative for the other antibodies. The morphology characterization, histochemical and immunohistochemical analysis of neoplastic cells allowed the definitive diagnosis of oral fibrosarcoma.

  17. Clinicopathological and Immunohistochemical Characterisation of Gastric Schwannomas in 29 Cases

    Science.gov (United States)

    Zheng, Lijun; Wu, Xiaojiang; Kreis, Martin E.; Yu, Zhen; Feng, Lijin; Chen, Chunqiu; Xu, Bin; Bu, Zhaode; Li, Ziyu; Ji, Jiafu

    2014-01-01

    Schwannomas are tumors arising from the nervous system that also occur infrequently in the gastrointestinal tract, most commonly in the stomach. This report characterizes 29 patients with benign or malignant gastric schwannomas. Surgical data and clinical follow-up information were available for 28 cases with a median postoperative duration of 57 months. Clinicopathological and immunohistochemical characteristics of benign and malignant schwannomas were analysed. Four cases (13.7%) were histologically diagnosed with malignant schwannoma. All tumors were positive for S-100 and CD56 proteins, displaying a diffuse staining pattern. Vimentin was expressed in 100% cases and all schwannomas were negative for smooth muscle actin, c-kit, and HMB-45. A significant difference was observed between the group of benign and malignant schwannomas as regards recurrences and metastasis after complete resection (P = 0.015). The survival time of patients with benign schwannomas was longer than the malignant group (P = 0.013), so gastric malignant schwannomas have a potential for recurrence and metastasis, with subsequently short survival. Complete resection with an attempt to remove all tumor tissue with negative margins is of paramount importance in the management of gastric schwannomas, particularly when they turn out to be malignant. PMID:24688535

  18. Clinicopathological and Immunohistochemical Characterisation of Gastric Schwannomas in 29 Cases

    Directory of Open Access Journals (Sweden)

    Lijun Zheng

    2014-01-01

    Full Text Available Schwannomas are tumors arising from the nervous system that also occur infrequently in the gastrointestinal tract, most commonly in the stomach. This report characterizes 29 patients with benign or malignant gastric schwannomas. Surgical data and clinical follow-up information were available for 28 cases with a median postoperative duration of 57 months. Clinicopathological and immunohistochemical characteristics of benign and malignant schwannomas were analysed. Four cases (13.7% were histologically diagnosed with malignant schwannoma. All tumors were positive for S-100 and CD56 proteins, displaying a diffuse staining pattern. Vimentin was expressed in 100% cases and all schwannomas were negative for smooth muscle actin, c-kit, and HMB-45. A significant difference was observed between the group of benign and malignant schwannomas as regards recurrences and metastasis after complete resection (P=0.015. The survival time of patients with benign schwannomas was longer than the malignant group (P=0.013, so gastric malignant schwannomas have a potential for recurrence and metastasis, with subsequently short survival. Complete resection with an attempt to remove all tumor tissue with negative margins is of paramount importance in the management of gastric schwannomas, particularly when they turn out to be malignant.

  19. Orthokeratotic Bowen disease: a histopathologic, immunohistochemical and molecular study.

    Science.gov (United States)

    Idriss, Munir H; Misri, Rachita; Böer-Auer, Almut

    2016-01-01

    Some examples of Bowen disease lack the characteristic broad parakeratosis making their histopathologic diagnosis particularly difficult in small and incomplete biopsies. The archives of our dermatopathology laboratory were searched for cases of Bowen disease with >75% orthokeratosis (orthokeratotic Bowen disease) and classic Bowen disease (>25% parakeratosis). Selected specimens were evaluated histopathologically, using immunohistochemical stains (CK10, CK7, Bcl-2, p16 and Ki-67) and by DNA amplification/sequencing for human papilloma virus (HPV) subtypes. Among 102 consecutive samples 14 cases of orthokeratotic Bowen disease were identified. In comparison with 24 examples of classic Bowen disease, the orthokeratotic examples occurred more frequently in female and younger patients (p = 0.04 and 0.008, respectively) but shared most of the histopathologic features of classic Bowen disease except a preserved granular layer and relative absence of the eyeliner sign (p Bowen disease. Orthokeratotic Bowen disease is a distinct variant of squamous cell carcinoma in situ associated with HPV infection in less than half of the cases studied. © 2015 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  20. Apoptosis activation in human carious dentin. An immunohistochemical study

    Directory of Open Access Journals (Sweden)

    C. Loreto

    2015-07-01

    Full Text Available The exact mechanisms and enzymes involved in caries progression are largely unclear. Apoptosis plays a key role in dentin remodelling related to damage repair; however, it is unclear whether apoptosis in decayed teeth is activated through the extrinsic or the intrinsic pathway. This ex vivo immunohistochemical study explored the localization of TRAIL, DR5, Bcl-2 and Bax, the main proteins involved in apoptosis, in teeth with advanced caries. To evaluate TRAIL, DR5, Bcl-2 and Bax immunoexpressions twelve permanent carious premolars were embedded in paraffin and processed for immunohistochemistry. The results showed that TRAIL and DR5 were overexpressed in dentin and in pulp vessels and mononuclear cells; strong Bax immunostaining was detected in dilated dentinal tubules close to the lesion, and Bcl-2 staining was weak in some dentin areas under the cavity or altogether absent. These findings suggest that both apoptosis pathways are activated in dental caries. Further studies are required to gain insights into its biomolecular mechanisms. 

  1. Immunohistochemical detection of P53 and Mdm2 in vitiligo

    Directory of Open Access Journals (Sweden)

    Ola A Bakry

    2012-01-01

    Full Text Available Background: Vitiligo is a common depigmented skin disorder that is caused by selective destruction of melanocytes. It is generally accepted that the main function of melanin resides in the protection of skin cells against the deleterious effect of ultraviolet rays (UVRs. Association of vitiligo and skin cancer has been a subject of controversy. Occurrence of skin cancer in long-lasting vitiligo is rare despite multiple evidences of DNA damage in vitiliginous skin. Aim: To detect the expression of P53 and Mdm2 proteins in both depigmented and normally pigmented skin of vitiligo patients and to compare it to control subjects suffering from nonmelanoma skin cancer (NMSC. Materials and Methods: Thirty-four patients with vitiligo and 30 age and sex-matched patients with nodulo-ulcerative basal cell carcinoma (BCC as a control group were selected. Both patients and control subjects had outdoor occupations. Skin biopsies were taken from each case and control subjects. Histopathological examination of Hematoxylin and eosin-stained sections was done. Expression of P53 and Mdm2 proteins were examined immunohistochemically. Results: Both P53 and Mdm2 were strongly expressed in depigmented as well as normally pigmented skin of vitiligo patients. This expression involved the epidermis, skin adnexa and blood vessels with significant differences between cases and controls. Conclusions: The overexpression of P53 and Mdm2 proteins in both normally pigmented and depigmented skin of patients with vitiligo could contribute to the decreased occurrence of actinic damage and NMSC in these patients.

  2. Evolution in endometrial cancer: evidence from an immunohistochemical study.

    Science.gov (United States)

    Vandenput, Ingrid; Trovik, Jone; Leunen, Karin; Wik, Elisabeth; Stefansson, Ingunn; Akslen, Lars; Moerman, Philippe; Vergote, Ignace; Salvesen, Helga; Amant, Frédéric

    2011-02-01

    It is poorly described how endometrial cancer biology changes during tumor evolution. We hypothesize that characterization of molecular targets in recurrent lesions is more relevant for targeting treatment. Paired biopsies from primary and recurrent endometrial cancer tumors (n = 85) were stained immunohistochemically for the following proteins: estrogen receptor (ER), progesterone receptor (PR), stathmin (correlating with phosphatidylinositol 3-kinase activity), HER-2/neu, WT1 (Wilms tumor gene 1), phospho-mammalian target of rapamycin (p-mTOR), and p53. Each tumor was scored, using a semiquantitative and subjective grading system. Discordance, a change in expression between primary and recurrent tumor, was defined as ≥ 2 step change; concordance was ≤ 1 step change. The frequency of change was correlated with established prognostic markers in endometrial cancer. Fifty-six patients (67%) were diagnosed with endometrioid carcinoma, 23 (27%) with serous/clear cell carcinoma. A change in expression between primary and recurrent tumor was noted in 7% to 31% of patients for ER, PR, stathmin, HER-2/neu, WT1, p-mTOR, and p53. Concordant-positive cases for PR were significantly correlated with stage, tumor grade, and histological subtype. Expression of ER, p53, and p-mTOR in cytoplasm in the recurrent tumor correlated significantly with survival. Endometrial cancer biology changes over time. The decision on targeted treatment should preferably be based on recurrent tumor characteristics.

  3. Carcinoma-associated antigens

    International Nuclear Information System (INIS)

    Bartorelli, A.; Accinni, R.

    1981-01-01

    This invention relates to novel antigens associated with breast carcinoma, anti-sera specific to said antigens, 125 I-labeled forms of said antigens and methods of detecting said antigens in serum or plasma. The invention also relates to a diagnostic kit containing standardised antigens or antisera or marked forms thereof for the detection of said antigens in human blood, serum or plasma. (author)

  4. Immunohistochemical demonstration of glial markers in retinoblastomas

    DEFF Research Database (Denmark)

    Schrøder, H D

    1987-01-01

    Twenty retinoblastomas were studied immunohistochemically in order to visualize glial cells. In the retina, the glial cells in the ganglion cell layer and the Müller cells were GFAP positive, while only the glial cells of the ganglion cell layer expressed S-100 reactivity. In the tumours S-100/GFAP...... cells reactive for both S-100 and GFAP were demonstrated. The latter findings may represent differentiation in a glial direction in the more mature parts of retinoblastoma....

  5. ANTIGENIC PROMOTION

    Science.gov (United States)

    Wu, Chin-Yu; Cinader, Bernard

    1971-01-01

    Rabbits were immunized with p-azobenzene arsonic acid derivatives of human serum albumin (HA-As) or of dissociated keyhole limpet hemocyanin. The IgM response to the hapten was evaluated in terms of the number of hapten-specific plaque-forming cells in the lymph node draining the injection site. In some experiments, antibody was measured by agglutination of tanned and sensitized erythrocytes. The hapten response of animals immunized with HA-As was increased (promoting effect) when the animals were injected with one of several structurally unrelated macromolecules: keyhole limpet hemocyanin (KLH), horse spleen ferritin (HSF), lysozyme (Lys), alum-precipitated human gamma globulin (alum-precipitated HGG). Different macromolecules differed in the magnitude of the promoting effect they induced, e.g., promotion by the associated form of KLH was greater than that by the dissociated form; alum-precipitated HGG was a better promoter than was soluble HGG. The relative magnitude of promotion by different macromolecules (associated vs. dissociated KLH, alum-precipitated vs. soluble HGG) correlated with the relative magnitude of the carrier effect, as judged by the hapten response induced by p-azobenzene arsonic acid conjugated to various proteins. Promotion was detected by agglutination assay of circulating antibody, by plaque assay of cells from the popliteal lymph node draining the site of preinjection, but not by plaque assay of cells from the contralateral lymph node. Promotion was dependent on the dose of the promoting macromolecule and on the dose of the hapten-protein conjugate. It was not observed in animals tolerant to the promoting macromolecule. Inhibition (i.e. antigenic competition), rather than promotion, was observed upon a secondary response to the preinjected macromolecule or when the hapten-protein conjugate was incorporated in Freund's adjuvant. PMID:15776570

  6. MORPHOLOGICAL AND IMMUNOHISTOCHEMICAL MANIFESTATIONS OF DIFFERENT VARIANTS OF ACUTE KIDNEY ALLOGRAFT REJECTION

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    A.V Trailin

    2009-01-01

    Full Text Available The aim of this study was morphological characteristics of peculiar properties of acute T-cells- (ATMR and antibody-mediated kidney allograft rejection (AAMR. Histological slices of kidney allograft biopsies were examined after coloration by routine methods and immunohistochemical proceeding for C4d, CD45R0 T-lymphocytes antigen and CD68 macrophages antigen. We’ve determined that the key features of ATMR are: increasing of T-lymphocytes interstitial infi ltration with the same level of macrophages infi ltration comparing with implantation biopsies, mild mononuclear glomerulitis and capillaritis; tubulitis. Morphological traits of AAMR are neutrophilic and T-lymphocytes glomerulitis, diffuse capillaritis, capillaries dilatation and margination of mononuclear cells with admixture of neutrophils, macrophagal interstitial infi ltration under semiquantitative evaluation, as well as, more pronounced, than in ATMR, T-lymphoctes and macrophages interstitial infi ltration under quantitative evaluation.

  7. Immunohistochemical Analysis of Oral Dysplasia: Diagnostic Assessment by Fascin and Podoplanin Expression

    International Nuclear Information System (INIS)

    Shimamura, Yumiko; Abe, Takahiro; Nakahira, Mitsuhiko; Yoda, Tetsuya; Murata, Shin-ichi; Sugasawa, Masashi

    2011-01-01

    The aim of this study was to investigate fascin and podoplanin expression in oral dysplasia and carcinoma in situ (CIS) immunohistochemically, and to evaluate their relationship to histopathological diagnosis based on architectural and cytological features. Fascin and podoplanin expression patterns were analyzed immunohistologically in 26 specimens of oral lesions, including benign disease (hyperplasia, papilloma, and others), intraepithelial neoplasia/borderline disease (dysplasia), and malignant disease (CIS, invasive squamous cell carcinoma). Fascin expression was scored into four original categories, and podoplanin expression was scored into five previously established categories. The relationship between the immunohistochemically determined scores of fascin and podoplanin expression and the architectural and cytological features in the hematoxylin-eosin-stained slides was analyzed statistically. The immunostaining scores for fascin and podoplanin were significantly higher in dysplasia and CIS than in benign disease (p=0.0011, p=0.00036), and they were significantly higher in dysplasia than in benign disease (p=0.0087, p=0.0032). In all cases of invasive SCC, fascin was expressed mainly in the cytoplasm of the tumor cells and fascin expression extended from the destruction of the basal layer of the epithelium to the upper layer of the epithelium and podoplanin was expressed in the cytoplasm and membrane of the tumor cells. This was the first report of up-regulation of fascin in oral dysplasia. Our results suggest that it would be helpful for improving the diagnostic accuracy of oral dysplasia and CIS to assess the expression of fascin and podoplanin immunohistochemically

  8. Melanin Bleaching With Warm Hydrogen Peroxide and Integrated Immunohistochemical Analysis: An Automated Platform.

    Science.gov (United States)

    Liu, Chia-Hsing; Lin, Chih-Hung; Tsai, Min-Jan; Chen, Yu-Hsuan; Yang, Sheau-Fang; Tsai, Kun-Bow

    2018-02-01

    Diagnosing melanocytic lesions is among the most challenging problems in the practice of pathology. The difficulty of physically masking melanin pigment and the similarity of its color to commonly used chromogens often complicate examination of the cytomorphology and immunohistochemical staining results for tumor cells. Melanin bleach can be very helpful for histopathological diagnosis of heavily pigmented melanocytic lesions. Although various depigmentation methods have been reported, no standardized methods have been developed. This study developed a fully automated platform that incorporates hydrogen peroxide-based melanin depigmentation in an automated immunohistochemical analysis. The utility of the method was tested in 1 cell block of malignant melanoma cells in pleural effusion, 10 ocular melanoma tissue samples, and 10 cutaneous melanoma tissue samples. Our results demonstrated that the proposed method, which can be performed in only 3 hours, effectively preserves cell cytomorphology and immunoreactivity. The method is particularly effective for removing melanin pigment to facilitate histopathological examination of cytomorphology and for obtaining an unmasked tissue section for immunohistochemical analysis.

  9. Endometriosis-associated hydrocele of the canal of Nuck with immunohistochemical confirmation: a case report.

    Science.gov (United States)

    Okoshi, Kae; Mizumoto, Masaki; Kinoshita, Koichi

    2017-12-21

    The canal of Nuck is an embryological vestige of the processus vaginalis, and presents a potential site for endometriosis seeding. Hydroceles in this region are a rare cause of inguinal swelling in females. In addition, endometriosis localized to the canal of Nuck is exceedingly rare. A 44-year-old Japanese woman presented with a painful mass overlying her right pubis. She underwent surgery to completely excise the mass. During surgery, division of the external oblique aponeurosis revealed a cyst that occupied the inguinal canal and it adhered to the transverse fascia, inguinal ligament, and pubic bone. The cyst was dissected from the round ligament, and the defect in the internal inguinal ring was repaired and reinforced with mesh. On macroscopic examination, the cyst had a heterogeneous fibrous aspect with dark brown inclusions. Microscopic examination revealed that the cyst was tortuous, lined by mesothelial-like cells, and accompanied by partial subcapsular hemorrhage. Endometrium-like tissue was observed in the cystic wall. Immunohistochemical staining for podoplanin confirmed the mesothelial origin of the cyst-lining cells. The epithelial cells and stromal cells were positive for estrogen receptors. In this case of an endometriosis-associated hydrocele of the canal of Nuck, the mesothelial origin of the cyst-lining cells and endometriosis were confirmed by positive immunohistochemical staining for podoplanin and estrogen receptors, respectively. We determined that hydrocele resection and reinforcement of the anterior inguinal canal wall (if necessary) are appropriate treatments for this condition.

  10. Immunohistochemical Expression of Myeloperoxidase in Placental Samples of Systematic Lupus Erythematosus Pregnancies

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    Zahra Heidari

    2016-08-01

    Full Text Available Objective: Reports of increased level of Myeloperoxidase (MPO in plasma and placental extracts of Systematic Lupus Erythematosus (SLE has been proposed that MPO may have an important role in this pregnancy complication. In present study immunohistochemical MPO expression was investigated in placental samples of SLE women compared with normal controls.Materials and methods: Ten patients with SLE were recruited as case group. Control group was selected from mothers with normal uncomplicated pregnancies. A monoclonal antibody specific for MPO was used for immunohistochemical staining and then the staining was quantified and differences between groups were compared using Mann-Whitney U test.Results: There were significant differences in the expression levels of MPO in the syncytiotrophoblast cells and the extravillous trophoblast cells between the control and SLE groups (p < 0.05. There were no significant differences in the expression level of MPO in the vascular endothelium and the relative number of the MPO-positive leukocytes in placental tissue between SLE and control groups (p > 0.05.Conclusion: The present study showed that MPO expression is increased in syncytiotrophoblast cells and the extravillous trophoblast cells of SLE placentas compared to healthy subjects. It seems that these changes are able to impress structure and function of placenta and survival of the fetus.

  11. Immunohistochemical study for the origin of ductular reaction in chronic liver disease.

    Science.gov (United States)

    Lee, Sun-Jae; Park, Jae-Bok; Kim, Kyung-Hyun; Lee, Woo-Ram; Kim, Jung-Yeon; An, Hyun-Jin; Park, Kwan-Kyu

    2014-01-01

    The appearance of proliferating bile ductular structures, which is called the "atypical ductular reaction" is frequently observed in various chronic liver diseases associated. However, the origin of these increased bile ductules has been a matter of controversy. In this study, we investigated the origin of ductular cells as an aspect of relation between epithelial to mesenchymal transition (EMT) and epithelial members of liver parenchyme, such as hepatocyte and cholangiocyte by immunohistochemical staining of human liver. Thirteen specimens of surgically resected liver with biliary cirrhosis were selected. Three sets of double immunohistochemical stains were done; Hep-Par 1 - cytokeratin 19 (CK19), Hep-Par 1 - α-sm ooth mus cle actin (α-SMA) and CK19 - α-SMA. As a result, we investigated the dual expression of the markers of hepatocyte and cholangiocyte in the same cell; in ductular cell and surrounding hepatocyte. However, there seems to be no dual expression of markers for EMT with epithelial markers. This study suggests a possibility of phenotypic change of mature hepatocyte into cholangiocyte. Future studies will be necessary to determine the role that proliferating cholangiocytes play in the pathogenesis of biliary fibrosis and how cholangiocytes interact with other cell types of the liver such as hepatic stellate cells or Kupffer cells.

  12. Immunohistochemical features of multifocal melanoacanthoma in the hard palate: a case report

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    das Chagas e Silva de Carvalho Luis Felipe

    2013-01-01

    Full Text Available Abstract Background Melanoacanthoma (MA has been described in the oral mucosa as a solitary lesion or, occasionally, as multiple lesions. MA mainly affects dark skinned patients and grows rapidly, showing a plane or slightly raised appearance and a brown to black color. The differential diagnosis includes oral nevi, amalgam tattoos, and melanomas. We report here the case of a 58-year-old black woman who presented multiple pigmented lesions on the hard palate. Case presentation Based on the differential diagnosis of melanoma, a punch biopsy (4 mm in diameter was performed. The material was fixed in 10% formalin, embedded in paraffin, and stained with hematoxylin-eosin or submitted to immunohistochemical analysis. Immunohistochemistry using antibodies against protein S-100, melan-A, HMB-45, MCM-2, MCM-5, Ki-67 and geminin was performed. Immunohistochemical analysis revealed strong cytoplasmic immunoreactivity of dendritic melanocytes for proteinS-100, HMB-45 and melan-A.Positive staining for proliferative markers (MCM-2, MCM-5, Ki-67 was only observed in basal and suprabasal epithelial cells, confirming the reactive etiology of the lesion. The diagnosis was oral Melanoacanthoma (MA. Conclusion The patient has been followed up for 30 months and shows no clinical alterations. MA should be included in the differential diagnosis of pigmented lesions of the oral cavity.

  13. Langerhans cells in lichen planus and lichenoid mucositis an immunohistochemical study

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    M Devi

    2014-01-01

    Full Text Available Aim: The aim of this study is to identify and evaluate Langerhans cell (LC in lichen planus (LP, lichenoid mucositis (LM and normal mucosa (NM using CD1a monoclonal antibody immunohistochemically. Materials and Methods: A total of 15 cases of oral lichen planus and 15 cases of LM were selected based on clinical examination and confirmed by histopathological analysis. The biopsies from the 10 patients were taken from normal buccal mucosa as control. Paraffin blocks of tissue were made, which are used for routine hematoxylin and eosin staining and immunohistochemical staining using biotin streptavidin methods (CD1a monoclonal antibody. Analysis of CD1a expression was performed by evaluating the labeling index (LI for each slide. Results: The mean CD1a LI for LP was significantly higher than that of LM and NM in the basal and supra basal layer. The mean CD1a positive cells in the connective tissues for LP were higher than that of LM and NM. Conclusion: This study clearly demonstrates a statistically significant increase in number of LC in LP than in LM, indicating the possible different immunopathogenic mechanisms.

  14. Immunohistochemical characterization of renal tumors in patients with Birt-Hogg-Dubé syndrome.

    Science.gov (United States)

    Iribe, Yasuhiro; Kuroda, Naoto; Nagashima, Yoji; Yao, Masahiro; Tanaka, Reiko; Gotoda, Hiroko; Kawakami, Fumi; Imamura, Yoshiaki; Nakamura, Yasushi; Ando, Midori; Araki, Akinobu; Matsushima, Jun; Nakatani, Yukio; Furuya, Mitsuko

    2015-03-01

    Birt-Hogg-Dubé syndrome (BHD) is an autosomal dominant disorder associated with a germline mutation of folliculin (FLCN). The affected families are at a high risk for developing multiple renal cell carcinomas (RCC). Little is known about the immunostaining patterns of mutant FLCN-associated RCCs. We investigated 32 RCCs obtained from 17 BHD patients. The studied tumors included chromophobe RCCs (n = 15), hybrid oncocytic/chromophobe tumors (HOCT) (n = 14) and clear cell RCCs (n = 3). Almost all chromophobe RCCs and HOCTs revealed positive staining for S100A1, Ksp-cadherin and CD82. They stained either focally or diffusely for CK7, and were negative for CA-IX. All clear cell RCCs were positively stained for CA-IX and negative for CK7. These data confirmed that mutant FLCN-associated oncocytic and clear cell RCCs exhibited generally similar immunostaining patterns compared to their sporadic counterparts. Frequent positive staining for S100A1, Ksp-cadherin and CD82 in chromophobe RCCs and HOCTs indicated that these two types were relatively similar rather than distinctively different in their patterns of immunoreactivity. Characteristic peri-nuclear halos and polygonal cells with clear cytoplasm, which often misleads pathologists into the diagnosis of clear cell RCC, should be carefully examined using an immunohistochemical panel including CA-IX, Ksp-cadherin, CD82 and CK7. © 2015 Japanese Society of Pathology and Wiley Publishing Asia Pty Ltd.

  15. Standard specimens for stain calibration: application to Romanowsky-Giemsa staining.

    Science.gov (United States)

    Turner, J N; Weir, B; Collins, D N

    1990-01-01

    Standardized specimens with reproducible staining properties were fabricated from extracts of biological objects (bovine liver, nucleoprotamine and defatted muscle). The standard specimens were stained with two formulations of the Romanowsky-Giemsa stain (RG), using the same azure B and eosin Y. One formulation used methanol and Sorensen's buffer and the other DMSO and Hepes buffer as solvents. The standard specimens were stained either in the composite stain or in the individual dyes dissolved in the same solvents and at the same concentration as the composite stain. Solution spectroscopy demonstrated different spectra for the two formulations with some wavelength regions varying by more than an order of magnitude. The RG spectra were also very different from those of the individual dyes dissolved at the RG concentration in the respective solvents. The stained standard specimens were analyzed by microspectrophotometry and were found to have spectra similar to those of cell smears. Furthermore, the standard specimens were shown to be a repeatable substrate for stain uptake. The transmitted light intensity from random fields of the same standardized specimen varied +/- 5%. When specimens were stained at the same time, the specimen-to-specimen variation depended on preparation conditions and the measurement wavelength, but was as good as +/- 5% for some conditions. The quantitative stain performance of both formulations was studied and compared. The standardized specimens provide a tool for the quantitative study of staining processes and specimen preparation procedures and for stain calibration.

  16. Pattern of distribution of blood group antigens on human epidermal cells during maturation

    DEFF Research Database (Denmark)

    Dabelsteen, Erik; Buschard, Karsten; Hakomori, Sen-Itiroh

    1984-01-01

    The distribution in human epidermis of A, B, and H blood group antigens and of a precursor carbohydrate chain, N-acetyl-lactosamine, was examined using immunofluorescence staining techniques. The material included tissue from 10 blood group A, 4 blood group B, and 9 blood group O persons. Murine...... on the lower spinous cells whereas H antigen was seen predominantly on upper spinous cells or on the granular cells. Epithelia from blood group A or B persons demonstrated A or B antigens, respectively, but only if the tissue sections were trypsinized before staining. In such cases A or B antigens were found...... monoclonal antibodies were used to identify H antigen (type 2 chain) and N-acetyl-lactosamine. Human antisera were used to identify A and B antigens. In all groups N-acetyl-lactosamine and H antigen were found on the cell membranes of the spinous cell layer. N-acetyl-lactosamine was present mainly...

  17. Tympanomastoid cholesterol granulomas: Immunohistochemical evaluation of angiogenesis.

    Science.gov (United States)

    Iannella, Giannicola; Di Gioia, Cira; Carletti, Raffaella; Magliulo, Giuseppe

    2017-08-01

    This study investigates the immunohistochemical expression of vascular endothelial growth factor (VEGF) and CD34 in patients treated for middle ear and mastoid cholesterol granulomas to evaluate the angiogenesis and vascularization of this type of lesion. A correlation between the immunohistochemical data and the radiological and intraoperative evidence of temporal bone marrow invasion and blood source connection was performed to validate this hypothesis. Retrospective study. Immunohistochemical expression of VEGF and CD34 in a group of 16 patients surgically treated for cholesterol granuloma was examined. Middle ear cholesteatomas with normal middle ear mucosa and external auditory canal skin were used as the control groups. The radiological and intraoperative features of cholesterol granulomas were also examined. In endothelial cells, there was an increased expression of angiogenetic growth factor receptors in all the cholesterol granulomas in this study. The quantitative analysis of VEGF showed a mean value of 37.5, whereas the CD34 quantitative analysis gave a mean value of 6.8. Seven patients presented radiological or intraoperative evidence of bone marrow invasion, hematopoietic potentialities, or blood source connections that might support the bleeding theory. In all of these cases there was computed tomography or intraoperative evidence of bone erosion of the middle ear and/or temporal bone structures. The mean values of VEGF and CD34 were 41.1 and 7.7, respectively. High values of VEGF and CD34 are present in patients with cholesterol granulomas. Upregulation of VEGF and CD34 is indicative of a remarkable angiogenesis and a widespread vascular concentration in cholesterol granulomas. 3b. Laryngoscope, 127:E283-E290, 2017. © 2017 The American Laryngological, Rhinological and Otological Society, Inc.

  18. Phenotypic and immunohistochemical characterization of sarcoglycanopathies

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    Ana F. B. Ferreira

    2011-01-01

    Full Text Available INTRODUCTION: Limb-girdle muscular dystrophy presents with heterogeneous clinical and molecular features. The primary characteristic of this disorder is proximal muscular weakness with variable age of onset, speed of progression, and intensity of symptoms. Sarcoglycanopathies, which are a subgroup of the limb-girdle muscular dystrophies, are caused by mutations in sarcoglycan genes. Mutations in these genes cause secondary deficiencies in other proteins, due to the instability of the dystrophin-glycoprotein complex. Therefore, determining the etiology of a given sarcoglycanopathy requires costly and occasionally inaccessible molecular methods. OBJECTIVE: The aim of this study was to identify phenotypic differences among limb-girdle muscular dystrophy patients who were grouped according to the immunohistochemical phenotypes for the four sarcoglycans. METHODS: To identify phenotypic differences among patients with different types of sarcoglycanopathies, a questionnaire was used and the muscle strength and range of motion of nine joints in 45 patients recruited from the Department of Neurology - HC-FMUSP (Clinics Hospital of the Faculty of Medicine of the University of São Paulo were evaluated. The findings obtained from these analyses were compared with the results of the immunohistochemical findings. RESULTS: The patients were divided into the following groups based on the immunohistochemical findings: a-sarcoglycanopathies (16 patients, b-sarcoglycanopathies (1 patient, y-sarcoglycanopathies (5 patients, and nonsarcoglycanopathies (23 patients. The muscle strength analysis revealed significant differences for both upper and lower limb muscles, particularly the shoulder and hip muscles, as expected. No pattern of joint contractures was found among the four groups analyzed, even within the same family. However, a high frequency of tiptoe gait was observed in patients with a-sarcoglycanopathies, while calf pseudo-hypertrophy was most common in

  19. Multicenter Assessment of Gram Stain Error Rates.

    Science.gov (United States)

    Samuel, Linoj P; Balada-Llasat, Joan-Miquel; Harrington, Amanda; Cavagnolo, Robert

    2016-06-01

    Gram stains remain the cornerstone of diagnostic testing in the microbiology laboratory for the guidance of empirical treatment prior to availability of culture results. Incorrectly interpreted Gram stains may adversely impact patient care, and yet there are no comprehensive studies that have evaluated the reliability of the technique and there are no established standards for performance. In this study, clinical microbiology laboratories at four major tertiary medical care centers evaluated Gram stain error rates across all nonblood specimen types by using standardized criteria. The study focused on several factors that primarily contribute to errors in the process, including poor specimen quality, smear preparation, and interpretation of the smears. The number of specimens during the evaluation period ranged from 976 to 1,864 specimens per site, and there were a total of 6,115 specimens. Gram stain results were discrepant from culture for 5% of all specimens. Fifty-eight percent of discrepant results were specimens with no organisms reported on Gram stain but significant growth on culture, while 42% of discrepant results had reported organisms on Gram stain that were not recovered in culture. Upon review of available slides, 24% (63/263) of discrepant results were due to reader error, which varied significantly based on site (9% to 45%). The Gram stain error rate also varied between sites, ranging from 0.4% to 2.7%. The data demonstrate a significant variability between laboratories in Gram stain performance and affirm the need for ongoing quality assessment by laboratories. Standardized monitoring of Gram stains is an essential quality control tool for laboratories and is necessary for the establishment of a quality benchmark across laboratories. Copyright © 2016, American Society for Microbiology. All Rights Reserved.

  20. Reduced expression of members of the mhc-i antigen processing machinery in ethnic Uighur women with cervical cancer in the Xinjiang region of China.

    Science.gov (United States)

    Haimiti, A; Hailiman, Y; Gulina, A; Du, J; Hao, Z; Rong, X L; Zainuer, A; Qin, W; Lalai, S

    2014-02-01

    Cervical cancer is a major cause of mortality in Uighur women compared with Han women in the Xinjiang region of China. Although a reduction in the class i major histocompatibility complex (mhc-i) antigen processing machinery (apm) is associated with the development of cervical cancer, the mhc-i apm has not been studied in this particular group of women, who have the highest incidence rate of cervical cancer in China. We used immunohistochemical staining and polymerase chain reaction amplification of viral dna from infection with the human papilloma virus (hpv) to study the expression of members of the mhc-i apm in cervical cancer sections collected from Uighur and Han women and in cervicitis samples from age-matched counterparts. Expression of the molecules of interest was compared between two ethnic groups, and expression of transporter associated with antigen processing 1 and 2, heat shock protein 90, and calnexin were found to be reduced even more significantly in Han women with cervical cancer than in Uighur women with same disease. However, compared with Han women, Uighur women had a higher rate of infection with hpv 16. The mhc-i apm were reduced in cervical cancer, with heterogeneity in the two ethnic groups. The reduction was more pronounced in Han women, who less frequently had hpv 16 infection, suggesting possible differences in the roles of members of the mhc-i apm and in the mechanisms of cervical cancer development in these two ethnic groups despite residence in the same region of China.

  1. Protein and antigenic heterogeneity among isolates of Bacillus piliformis.

    OpenAIRE

    Riley, L K; Besch-Williford, C; Waggie, K S

    1990-01-01

    Protein and antigenic heterogeneity among isolates of Bacillus piliformis, the etiologic agent of Tyzzer's disease, were investigated. The seven isolates utilized in this study were originally isolated from naturally infected animals of different animal species and diverse geographical locations. Isolates were propagated in mammalian cell lines, and bacterial extracts were prepared. Protein and antigenic profiles were compared among isolates, using Coomassie blue-stained polyacrylamide gels a...

  2. Antigenic characterisation of lyssaviruses in South Africa

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    Ernest Ngoepe

    2014-09-01

    Full Text Available There are at least six Lyssavirus species that have been isolated in Africa, which include classical rabies virus, Lagos bat virus, Mokola virus, Duvenhage virus, Shimoni bat virus and Ikoma lyssavirus. In this retrospective study, an analysis of the antigenic reactivity patterns of lyssaviruses in South Africa against a panel of 15 anti-nucleoprotein monoclonal antibodies was undertaken. A total of 624 brain specimens, collected between 2005 and 2009, confirmed as containing lyssavirus antigen by direct fluorescent antibody test, were subjected to antigenic differentiation. The lyssaviruses were differentiated into two species, namely rabies virus (99.5% and Mokola virus (0.5%. Furthermore, rabies virus was further delineated into two common rabies biotypes in South Africa: canid and mongoose. Initially, it was found that the canid rabies biotype had two reactivity patterns; differential staining was observed with just one monoclonal antibody. This difference was likely to have been an artefact related to sample quality, as passage in cell culture restored staining. Mongoose rabies viruses were more heterogeneous, with seven antigenic reactivity patterns detected. Although Mokola viruses were identified in this study, prevalence and reservoir host species are yet to be established. These data demonstrate the usefulness of monoclonal antibody typing panels in lyssavirus surveillance with reference to emergence of new species or spread of rabies biotypes to new geographic zones.

  3. Immunohistochemical expression of components of the Akt-mTORC1 pathway is associated with hepatocellular carcinoma in patients with chronic liver disease.

    Science.gov (United States)

    Cotler, Scott J; Hay, Nissim; Xie, Hui; Chen, Mei Ling; Xu, Pei Zhang; Layden, Thomas J; Guzman, Grace

    2008-03-01

    Activation of the Akt-mTORC1 signaling pathway was evaluated in premalignant and hepatocellular carcinoma (HCC) lesions by assessing the expression of pS6, an Akt effector, and PTEN, an Akt suppressor. Immunohistochemical staining for pS6 and PTEN was performed on liver tissue from 52 patients with cirrhosis, with and without HCC. Two pathologists independently evaluated pS6 staining on a semiquantitative scale and categorized PTEN staining as present or absent. In the HCC group, pS6 staining was greatest in HCC, followed by dysplasia, and benign cirrhotic tissue (P < 0.001). pS6 staining was greater in cirrhotic tissue from patients with HCC compared to cirrhosis in patients without HCC (P = 0.03). PTEN staining in tumor was absent in 8/33 (24%) cases. Loss of PTEN expression was more common in patients with higher tumor stage, compared to those with stage 1 tumors (P = 0.04). Immunohistochemical evidence of activation of the Akt-mTORC1 pathway is associated with HCC.

  4. [Value of immunohistochemical staining with mutation-specific antibodies in detecting EGFR mutations: a meta-analysis].

    Science.gov (United States)

    Ma, Qing; Wang, Jing; Zhong, Diansheng; Ning, Chao; Liu, Chang; Xiao, Ping

    2014-06-20

    It has been proven that epidermal growth factor receptor (EGFR) mutation is the most important predictive factor for determining the effect of EGFR tyrosine kinase inhibitors (TKIs) applied to non-small cell lung cancer (NSCLC) patients. The patients with EGFR mutations response better to TKIs. To detect EGFR mutation has been particularly essential to select first-line treatment for lung cancer patients. To research and analyze the sensitivity and specificity of immunohistochemistry (IHC) using mutation specific antibodies in detecting EGFR mutations compared with DNA sequencing, and further evaluate the accuracy and clinical application value of IHC. All required articles in Pubmed database were searched. The deadline of retrieval was March 26, 2013. Then further screening the articles based on the inclusion and exclusion criteria. Meta analysis of diagnostic test was applied to analyze the sensitivity and specificity of IHC compared with DNA sequencing for the detection of EGFR mutations. Ten articles were included in the meta analysis, there were 1,679 samples in L858R group and 1,041 samples in E746-A750del group. The DOR were 225.17 (95%CI: 55.67-910.69) and 267.16 (95%CI: 132.45-538.88) respectively; the AUC of SROC were 0.948,4 (SEAUC=0.014,4) and 0.981,3 (SEAUC=0.009,9) respectively; the Q values were 0.888,3 (SEQ*=0.019,2) and 0.939,7 (SEQ*=0.019,1) respectively. The specificity and sensitivity of IHC method using these two mutation-specific antibodies were relatively high. As a screening method for EGFR mutations, the IHC with mutation specific antibodies is of clinical value.

  5. Utility of 5-Methylcytosine Immunohistochemical Staining to Assess Global DNA Methylation and Its Prognostic Impact in MDS Patients

    Science.gov (United States)

    Chandra, Dinesh; Tyagi, Seema; Singh, Jasdeep; Deka, Roopam; Manivannan, Prabhu; Mishra, Pravas; Pati, Hara Prasad; Saxena, Renu

    2017-12-29

    Background: DNA methylation plays a vital role in the pathogenesis of the myelodysplastic syndrome (MDS), a heterogeneous group of clonal hematopoietic stem cell (HSC) disorders. It is reported to be an independent prognostic factor affecting overall survival (OS). Our aim was to analyze the role of global DNA methylation using an anti-5-methylcytosine (5-MC) antibody by immunohistochemistry (IHC) of bone marrow biopsy (BM Bx) specimens in MDS patients, assessing correlations with various clinical and biological prognostic factors. Material and methods: A total of 59 MDS cases, classified as per the World Health Organization (WHO) 2008 guidelines, were evaluated over a period of 4 years. Clinical data were retrieved from departmental case records and anti-5-MC expression was analyzed with formalin fixed paraffin embedded sections of BM Bx specimens of MDS patients and controls. Results: The median age at diagnosis was 52 years (15-85years). Patients were categorized into low risk (59%) and high risk (41%) according to International Prognostic Scoring System (IPSS). The median follow-up time was 10 months (1 to 37 months). We generated a methylation score (M-score) using anti-5-MC and with the derived cut-off of 30.5 from the receiver operator curve (ROC), there was a significant difference between the two groups in the percentage of BM blasts (p=0.01), WHO sub-type (p=0.01), IPSS (p=0.004), progression to AML (p=0.04) on univariate analysis. Interestingly, patients showing a high M-score (M-score ≥ 30.5) demonstrated a significantly shorter OS and progression to AML. However, on multivariate analysis, only BM blasts (p=0.01) and IPSS (p=0.02) remained independent variables for progression to AML and OS respectively. Conclusion: Immunostaining with anti-5-MC antibody with BM Bx samples is a simple and cost effective technique to detect global methylation, a powerful tool to predict overall survival in patients with MDS. Creative Commons Attribution License

  6. Utility of Phox2b immunohistochemical stain in neural crest tumours and non-neural crest tumours in paediatric patients.

    Science.gov (United States)

    Warren, Mikako; Matsuno, Ryosuke; Tran, Henry; Shimada, Hiroyuki

    2018-03-01

    This study evaluated the utility of Phox2b in paediatric tumours. Previously, tyrosine hydroxylase (TH) was the most widely utilised sympathoadrenal marker specific for neural crest tumours with neuronal/neuroendocrine differentiation. However, its sensitivity is insufficient. Recently Phox2b has emerged as another specific marker for this entity. Phox2b immunohistochemistry (IHC) was performed on 159 paediatric tumours, including (group 1) 65 neural crest tumours with neuronal differentiation [peripheral neuroblastic tumours (pNT)]: 15 neuroblastoma undifferentiated (NB-UD), 10 NB poorly differentiated (NB-PD), 10 NB differentiating (NB-D), 10 ganglioneuroblastoma intermixed (GNBi), 10 GNB nodular (GNBn) and 10 ganglioneuroma (GN); (group 2) 23 neural crest tumours with neuroendocrine differentiation [pheochromocytoma/paraganglioma (PCC/PG)]; (group 3) 27 other neural crest tumours including one composite rhabdomyosarcoma/neuroblastoma; and (group 4) 44 non-neural crest tumours. TH IHC was performed on groups 1, 2 and 3. Phox2b was expressed diffusely in pNT (n = 65 of 65), strongly in NB-UD and NB-PD and with less intensity in NB-D, GNB and GN. Diffuse TH was seen in all NB-PD, NB-D, GNB and GN, but nine of 15 NB-UD and a nodule in GNBn did not express TH (n = 55 of 65). PCC/PG expressed diffuse Phox2b (n = 23 of 23) and diffuse TH, except for one tumour (n = 22 of 23). In composite rhabdomyosarcoma, TH was expressed only in neuroblastic cells and Phox2b was diffusely positive in neuroblastic cells and focally in rhabdomyosarcoma. All other tumours were negative for Phox2b (n = none of 44). Phox2b was a specific and sensitive marker for pNT and PCC/PG, especially useful for identifying NB-UD often lacking TH. Our study also presented a composite rhabdomyosarcoma/neuroblastoma of neural crest origin. © 2017 John Wiley & Sons Ltd.

  7. Purified azure B as a reticulocyte stain.

    Science.gov (United States)

    Marshall, P N; Bentley, S A; Lewis, S M

    1976-01-01

    A comparison has been made between reticulocyte preparations stained with purified azure B and with several commerically available batches of brilliant cresyl blue and new methylene blue. Marked variations were observed in the composition and staining performances of the various batches of the two commerically available dyes. Although there were no significant differences in reticulocyte counts obtained with these two dyes, varying amounts of an extraneous, particulate dye deposit were present in these preparations, making accuracte counting both tedious and timeconsuming. Purified azure B, on the other hand, gave reproducibly stained, deposit-free preparations. Reticulocyte counts obtained from azure B preparations correlated almost exactly with those determined using new methylene blue. Purified azure B is therefore recommended as a convenient reticulocyte stain for routine use. Images PMID:64475

  8. Research on pre-staining gel electrophoresis

    International Nuclear Information System (INIS)

    Zhong Ruibo; Liu Yushuang; Zhang Ping; Liu Jingran; Zhao Guofen; Zhang Feng

    2014-01-01

    Background: Gel electrophoresis is a powerful biochemical separation technique. Most biological molecules are completely transparent in the visible region of light, so it is necessary to use staining to show the results after gel electrophoresis, and the general steps of conventional staining methods are time-consuming. Purpose: We try to develop a novel approach to simplify the gel electrophoresis: Pre-Staining Gel Electrophoresis (PSGE), which can make the gel electrophoresis results monitored in real time. Methods: Pre-stain the protein samples with Coomassie Brilliant Blue (CBB) for 30 min before loading the sample into the gel well. Results and Conclusion: PSGE can be successfully used to analyze the binding efficiency of Bovine Serum Albumin (BSA) and amphiphilic polymer via chemical coupling and physical absorption, and the double PSGE also shows a great potential in bio-analytical chemistry. (authors)

  9. A comparative analysis of angiopoietin 2 immunohistochemical ...

    African Journals Online (AJOL)

    2016-07-12

    Jul 12, 2016 ... Conclusions: As a result, the relationship between lung cancer stage and Ang 2 was documented with this study and the expression rate ... in lung cancer. Key words: lung cancer, angiopoietin 2, biopsy, stage, immonohistochemical staining ..... expression and pathologic parameters of ovarian cancer. Ang.

  10. New Grocott Stain without Using Chromic Acid

    International Nuclear Information System (INIS)

    Shiogama, Kazuya; Kitazawa, Kayo; Mizutani, Yasuyoshi; Onouchi, Takanori; Inada, Ken-ichi; Tsutsumi, Yutaka

    2015-01-01

    We established a new “ecological” Grocott stain for demonstrating fungi, based upon a 4R principle of refusal, reduction, reuse, and recycle of waste management. Conventional Grocott stain employs environmentally harsh 5% chromic acid for oxidization. Initially, we succeeded in reducing the concentration of chromic acid from 5% to 1% by incubating the solution at 60°C and using five-fold diluted chromic acid solution at which point it was reusable. Eventually, we reached the refusal level where 1% periodic acid oxidization was efficient enough, when combined with preheating of sections in the electric jar, microwave oven, or pressure pan. For convenience sake, we recommend pressure pan heating in tap water for 10 min. Stainability of fungi in candidiasis and aspergillosis was comparable with conventional Grocott stain, while Mucor hyphae showed enhanced staining. The modified sequence was further applicable to detecting a variety of mycotic pathogens in paraffin sections. Our environmentally-friendly Grocott stain also has the advantage of avoiding risk of human exposure to hexavalent chromium solution in the histopathology laboratory. The simple stain sequence is can be easily applied worldwide

  11. Subcellular dissemination of prothymosin alpha at normal physiology: immunohistochemical vis-a-vis western blotting perspective.

    Science.gov (United States)

    Kijogi, Caroline Mwendwa; Khayeka-Wandabwa, Christopher; Sasaki, Keita; Tanaka, Yoshimasa; Kurosu, Hiroshi; Matsunaga, Hayato; Ueda, Hiroshi

    2016-03-01

    The cell type, cell status and specific localization of Prothymosin α (PTMA) within cells seemingly determine its function. PTMA undergoes 2 types of protease proteolytic modifications that are useful in elucidating its interactions with other molecules; a factor that typifies its roles. Preferably a nuclear protein, PTMA has been shown to function in the cytoplasm and extracellularly with much evidence leaning on pathognomonic status. As such, determination of its cellular distribution under normal physiological context while utilizing varied techniques is key to illuminating prospective validation of its distinct functions in different tissues. Differential distribution insights at normal physiology would also portent better basis for further clarification of its interactions and proteolytic modifications under pathological conditions like numerous cancer, ischemic stroke and immunomodulation. We therefore raised an antibody against the C terminal of PTMA to use in tandem with available antibody against the N terminal in a murine model to explicate the differences in its distribution in brain cell types and major peripheral organs through western blotting and immunohistochemical approaches. The newly generated antibody was applied against the N-terminal antibody to distinguish truncated versions of PTMA or deduce possible masking of the protein by other interacting molecules. Western blot analysis indicated presence of a truncated form of the protein only in the thymus, while immunohistochemical analysis showed that in brain hippocampus the full-length PTMA was stained prominently in the nucleus whereas in the stomach full-length PTMA staining was not observed in the nucleus but in the cytoplasm. Truncated PTMA could not be detected by western blotting when both antibodies were applied in all tissues examined except the thymus. However, immunohistochemistry revealed differential staining by these antibodies suggesting possible masking of epitopes by interacting

  12. Serrated pathway adenocarcinomas: molecular and immunohistochemical insights into their recognition.

    Directory of Open Access Journals (Sweden)

    Simona Gurzu

    Full Text Available Colorectal adenocarcinomas (CRC developed through serrated pathway seem to present particular behavior compared with the non-serrated ones, but recognition of them is difficult to do. The aim of our paper was to establish some criteria to facilitate their identification.In 170 consecutive CRCs, we performed immunohistochemical staining with Cytokeratin 7 (CK7 and Cytokeratin 20 (CK20 and also with p53 and MLH-1. At the same time, we analyzed BRAF and K-ras mutations and the microsatellite status of CRC.26.47% of cases expressed CK7, and 16.47% were CK20-negative. Diffuse positivity for CK7 was associated in the proximal colon with CK20 negativity or weak positivity, BRAF mutations, lack of K-ras mutations, and p53 and MLH-1 negativity. All these cases were microsatellite-unstable and were diagnosed in stage II. Those cases from the distal colon and rectum that expressed CK7 were K-ras-mutated and had low p53 index and MLH-1 positivity, independent of the CK20 expression.CK7, associated with MLH-1 and p53 expression, and also with the microsatellite status, BRAF and K-ras pattern, might be used to identify the CRC potentially going through serrated pathway. The serrated pathway adenocarcinomas of the proximal colon that do not display the morphological features of this pattern are more frequent CK7+/p53-/MLH-1-/BRAF-mutated/K-ras-wt/MSI cases, but those located in the distal colorectal segments seem to be CK7+/CK20+/p53-/MLH-1+/BRAF wt/K-ras-mutated/MSS cases.

  13. Collagenous gastritis: a morphologic and immunohistochemical study of 40 patients.

    Science.gov (United States)

    Arnason, Thomas; Brown, Ian S; Goldsmith, Jeffrey D; Anderson, William; O'Brien, Blake H; Wilson, Claire; Winter, Harland; Lauwers, Gregory Y

    2015-04-01

    Collagenous gastritis is a rare condition defined histologically by a superficial subepithelial collagen layer. This study further characterizes the morphologic spectrum of collagenous gastritis by evaluating a multi-institutional series of 40 patients (26 female and 14 male). The median age at onset was 16 years (range 3-89 years), including 24 patients (60%) under age 18. Twelve patients (30%) had associated celiac disease, collagenous sprue, or collagenous colitis. Hematoxylin and eosin slides were reviewed in biopsies from all patients and tenascin, gastrin, eotaxin, and IgG4/IgG immunohistochemical stains were applied to a subset. The distribution of subepithelial collagen favored the body/fundus in pediatric patients and the antrum in adults. There were increased surface intraepithelial lymphocytes (>25 lymphocytes/100 epithelial cells) in five patients. Three of these patients had associated celiac and/or collagenous sprue/colitis, while the remaining two had increased duodenal lymphocytosis without specific etiology. An eosinophil-rich pattern (>30 eosinophils/high power field) was seen in 21/40 (52%) patients. Seven patients' biopsies demonstrated atrophy of the gastric corpus mucosa. Tenascin immunohistochemistry highlighted the subepithelial collagen in all 21 specimens evaluated and was a more sensitive method of collagen detection in biopsies from two patients with subtle subepithelial collagen. No increased eotaxin expression was identified in 16 specimens evaluated. One of the twenty-three biopsies tested had increased IgG4-positive cells (100/high power field) with an IgG4/IgG ratio of 55%. In summary, collagenous gastritis presents three distinct histologic patterns including a lymphocytic gastritis-like pattern, an eosinophil-rich pattern, and an atrophic pattern. Eotaxin and IgG4 were not elevated enough to implicate these pathways in the pathogenesis. Tenascin immunohistochemistry can be used as a sensitive method of collagen detection.

  14. Stain Removal Assessment of Two Manual Toothbrushes with an Interproximal Tooth Stain Index.

    Science.gov (United States)

    Farrell, Svetlana; Grender, Julie M; Terézhalmy, Geza; Archila, Luis R

    2015-01-01

    To assess a newly developed index to measure interproximal stain and evaluate the stain removal efficacy of two commercially available manual toothbrushes. This was a randomized, examiner-blind, parallel-group, two-treatment clinical trial of two weeks' duration. Subjects qualified for the study if they had an average Modified Lobene Stain Index of ≥ 1.5 from two anterior teeth. At baseline, subjects brushed in front of a mirror for one minute under supervision. All subjects were provided with a standard 0.243% sodium fluoride dentifrice and were randomly assigned either an Oral-B Pulsar manual brush (OBP) or a Colgate Whitening manual brush (CW) to use for two weeks. Stain was reassessed after two weeks of product use. Stain measurements were conducted using the Modified Lobene Stain Index and the new Interproximal Modified Lobene Stain Index, which allows for assessment of stain in hard-to-reach areas using the same area and intensity scales as the Modified Lobene Stain Index. Use of the two manual brushes resulted in statistically significant reductions in surface stain relative to baseline after two weeks of use. Median stain reductions were 78% and 60% for the OBP and CW, respectively, as measured by the Modified Lobene Stain Index. The mean changes in the composite scores from baseline to week two were 1.85 and 1.57 for the two treatment groups, respectively. Statistically significant reductions from baseline were also found for the intensity and extent of stain measures (p brush and 83% reduction with the CW brush. For the gingival sites, the median stain removal percentages were 83% and 50%, respectively For the body region, a median stain removal of 100% was found for both treatment groups. No statistically significant differences were found between the two groups for the mean composite scores for either index. Both manual brushes showed effective stain removal, including interproximal hard-to-reach sites. The Interproximal Modified Lobene Stain Index

  15. Highlighting nuclear membrane staining in thyroid neoplasms with emerin: review and diagnostic utility.

    Science.gov (United States)

    Kinsella, Mary D; Hinrichs, Benjamin; Cohen, Cynthia; Siddiqui, Momin T

    2013-06-01

    Immunohistochemical staining (IHC) with emerin, an integral inner nuclear membrane protein, highlights nuclear membrane details in papillary thyroid carcinoma (PTC). We evaluated emerin for highlighting nuclear shape, grooves, inclusions, circumferential nuclear membrane irregularities ("garlands"), deep "stellate" membrane invaginations, and crescents in 34 fine-needle aspiration (FNA) cell blocks, PTC (n = 24) and follicular neoplasms (FN) (n = 10). Tissue microarrays were also examined for 182 cases, PTC (n = 95) and non-PTC (n = 87). Emerin IHC of PTC revealed a predominantly oval nuclear shape in the majority of cases, with FN demonstrating round nuclei and FV of PTC showing a roughly equal distribution of round and oval shapes. In addition to oval nuclear shape, the presence of emerin-positive nuclear grooves, circumferential emerin nuclear "garlands," nuclear crescent shapes, and chromatin clearing on cell block H&E staining were significant predictors of PTC by regression analysis. Emerin IHC of thyroid FNA and surgical specimens serves as a useful adjunct to conventional H&E staining in the diagnosis of PTC and its distinction from FN by delineating diagnostic nuclear membrane irregularities ("garlands" and crescents), nuclear grooves, and a characteristic oval nuclear shape. In diagnostically challenging cases with limited cellularity, emerin staining can help to provide a more definitive diagnosis of PTC. Copyright © 2012 Wiley Periodicals, Inc.

  16. Immunohistochemical evaluation of lesions in the gastrointestinal ...

    African Journals Online (AJOL)

    , using the immunoperoxidase technique. P. multocida B:2 antigen was detected not only in the bacterial clusters in the gastric pits, intestinal epithelia and capillaries, Brünner's glands and Crypt of Lieberkühn but was also seen interacting with ...

  17. Immunogold Staining of London Resin (LR) White Sections for Transmission Electron Microscopy (TEM).

    Science.gov (United States)

    Skepper, Jeremy N; Powell, Janet M

    2008-06-01

    INTRODUCTIONIn post-embedding methods of immunogold staining, the cells or tissues are fixed chemically or cryoimmobilized, dehydrated, and embedded in epoxy or acrylic resins. Thin sections (50-70 nm in thickness) are cut using an ultramicrotome with a diamond knife, using a water bath to collect the sections as they slide off the knife. The sections are stretched with solvent vapor or a heat source and collected onto either bare or plastic-coated nickel grids. The sections are then stained immunochemically with primary antibodies raised against antigens exposed on the surface of the sections. The primary antibodies are visualized by staining immunochemically with secondary antibodies raised against the species and isotype of the primary antibodies, conjugated to colloidal gold particles. The immunochemically stained sections are then contrast stained with salts of uranium (uranyl acetate) and lead (lead citrate) to reveal the ultrastructure of the cells, and are finally viewed by transmission electron microscopy (TEM). LR White was introduced as a low-toxicity alternative to epoxy resins, which frequently contained carcinogens. Unlike the simplest acrylic resins, in which monomers are polymerized to form long chains, the LR resins contain aromatic cross-linkers to improve the stability of the sections under the electron beam. LR White and Gold both have very low viscosity and readily penetrate, even into dense tissue. In this protocol, aldehyde-fixed tissue is dehydrated in ethanol, impregnated in LR White resin and polymerized under vacuum or in a nitrogen atmosphere before sectioning and immunogold staining.

  18. Experimental Maedi Visna Virus Infection in sheep: a morphological, immunohistochemical and PCR study after three years of infection

    Directory of Open Access Journals (Sweden)

    S Preziuso

    2009-06-01

    Full Text Available A morphological, immunohistochemical and polymerase chain reaction (PCR study was performed on eight ewes experimentally infected with an Italian strain of Maedi-Visna Virus (MVV in order to evaluate the lesions and the viral distribution after three years of infection. At the moment of euthanasia, seven sheep were seropositive for MVV, while one sheep in poor body conditions was seronegative since one year. Lungs, pulmonary lymph nodes, udder, supramammary lymph nodes, carpal joints, the CNS, spleen and bone marrow of the eight infected sheep were collected for histology, for immunohistochemical detection of the MVV core protein p28 and for PCR amplification of a 218 bp viral DNA sequence of the pol region. The most common histological findings consisted of interstitial lymphoproliferative pneumonia and lymphoproliferative mastitis of different severity, while no lesions were observed in the CNS. MVV p28 antigen was immunohistochemically labelled in lungs, udder, pulmonary lymph nodes, spleen and bone marrow but not in the CNS of all the eight infected sheep. A 218 bp sequence of MVV pol region was detected in lung of a seropositive and of the seroconverted negative sheep. The results suggest that (i MVV causes heterogeneous lesions in homogeneously reared ewes, (ii MVV p28 antigen is detectable not only in inflammed target organs, but also in pulmonary lymph nodes, spleen and bone marrow, and (iii immunohistochemistry and PCR are useful methods for Maedi-Visna diagnosis in suspected cases, also when serological tests are negative.

  19. Prognostic value of immunohistochemical marker HER2/neu in patients resected for gastric cancer stage IIIA

    Directory of Open Access Journals (Sweden)

    O. M. Levyk

    2014-04-01

    Full Text Available Introduction Patients with the same stage of malignancy often have different life-span, which makes it necessary to search for new prognostic factors. The high incidence and low survival rate of patients with gastric cancer also cause an increased interest in studying the immunohistochemical profile of tumors of the stomach. Recently, researchers are studying the prognostic significance of immunohistochemical markers such as: EGFR [10], VEGF [12,15,18], HER2/neu [8,17,19], expression of betakatenin [1], hERG1 [7], p53 [14], PCNA [14,20] Of particular interest is the HER2/neu. Overexpression of HER2/neu promotes tumor growth and plays an important role in the pathogenesis of some human malignancies [17].Nevertheless, the impact of HER2/neu status on the prognosis of patients with gastric cancer remains controversial [6,11,19]. Nakajima Garcia and colleagues believe that the increased expression of HER2/neu in patients with gastric cancer correlates with poor prognosis and more aggressive disease [11]. At the same time, Begnami found that life expectancy in gastric cancer patients with HER-2/neu-positively stained tumors was significantly shorter than in patients with HER-2/neu-negatively stained tumors (17 months vs. 40 months, respectively, p=0.023 [5]. The aim of research Study the prognostic significance of immunohistochemical marker HER-2/neu in patients resected for gastric cancer stage IIIA. Materials and methods Materials for the study were histologic surgical specimens of the primary tumor in 21 patients who had surgery in the Zaporozhye Regional Clinical Oncology Center due to stomach cancer stage IIIA, including 14 men (67% and 7 females (33%. Patients underwent surgery in the volume: gastrectomy and distal subtotal resection, 86% of patients received adjuvant chemotherapy of standard schemes. Immunohistochemical study of HER2/neu (erbB-2 used a rabbit polyclonal antibody. Immunohistochemical reaction was evaluated as negative in the

  20. Immunohistochemical expression of Notch signaling in the lining epithelium of periapical cysts.

    Science.gov (United States)

    Meliou, Eleni; Kerezoudis, Nikolaos; Tosios, Konstantinos; Lafkas, Daniel; Kiaris, Hippokratis

    2011-02-01

    In this study we evaluated the immunohistochemical expression of the receptors Notch 1 and Notch 2, the ligand Delta 1, and the transcription factors HES 1 and HES 5 in the epithelium of well-defined periapical cysts. Immunohistochemistry was carried out on 55 formalin-fixed and paraffin-embedded, well-defined periapical cysts with minimum inflammation, obtained from the archival tissue database of the Department of Oral Pathology and Surgery. Western blotting was performed to evaluate the specificity of the anti-Notch antibody and the expression of Notch signaling in 5 fresh-frozen periapical cysts. The levels of staining intensity were estimated by the performance of a semiautomated image analysis system. Descriptive statistic of mean values obtained by computerized image analysis method was performed. Immunostaining reaction of all Notch signaling components was observed in the cytoplasm and/or the cytoplasmic membrane in the majority of epithelial cells of periapical cysts. Nuclear staining was observed occasionally in all cases. Notch 2 showed strong staining in 52.83% of the cases, followed by Notch 1 (35.85%), HES 1 and HES 5 moderate staining in 72.73% and 57.69% of the cases, respectively, and Delta 1 weak staining in 58.33% of the cases. No statistical correlation was found between the antibodies and the sex or the age of the study group. Notch is an evolutionarily conserved signaling mechanism that regulates cell fate decisions during development and postnatal life in organisms as diverse as worms, flies, and humans. The present observations indicate that Notch pathway is active downstream in the lining epithelium of periapical cysts, suggesting an involvement of this pathway in periapical cyst growth and expansion. Copyright © 2011 American Association of Endodontists. Published by Elsevier Inc. All rights reserved.

  1. Immunohistochemical characteristics of breast cancer after radiotherapy

    International Nuclear Information System (INIS)

    Lushnikov, E.F.; Dorosevich, A.E.

    1983-01-01

    Histological and immunohistochemical examination of the tissue from 45 breast cancer patients after surgery (14) and combined treatment (31) Was performed. Using direct Coons method the localization of immune complexes and immunoglobulins of the main classes (G, A, M) was revealed. Deposits of immune complexes including immunoglobulins of different classes were found in 8 patients of the 1st group and 22 patients of the 2 nd group. Immune complexes were mostly localized extracellularly in the stroma. After irradiation extensive deposit and more intense fluorescence of immune complexes in the stroma of a tumor, lumps in the walls of the major vessels were observed. It is assumed that immune complexes and immunoglobulins of different classes related to breast cancer epithelial cells, block the immunological interaction of T lymphocytes with cancer cells were carried out. The suppression effect of radiotherapy on tumor cell receptor activity has been shown that is not only of theoretical but also of practical interest

  2. Immunohistochemical diagnosis of fusariosis with monoclonal antibodies

    DEFF Research Database (Denmark)

    Jensen, H.E.; Aalbæk, B.; Jungersen, Gregers

    Objectives: Fusariosis is an emerging fungal infection, especially in neutropenic patients. Proper identification of Fusarium spp. is important because the choice of antifungal treatment of fusariosis differs from that of aspergillosis, candidosis or scedosporidiosis (pseudalleceriosis). Cultural...... isolation attempts from fusarium lesions often fail, and because the tissue forms of Fusarium spp. are histologically indistinguishable from fungal elements of aspergillosis, true hyphae containing candidosis and scedosporidiosis (pseudalleceriosis), alternative diagnostic techniques are often necessary...... for establishing an accurate diagnosis. Although molecular techniques (e.g. in situ hybridization and PCR) have been explored for diagnostic use, the development of specific monoclonal antibodies (Mabs) for immunohistochemical identification of Fusarium spp. will extend the availability of diagnostic options...

  3. Nerve fibre studies in skin biopsies in peripheral neuropathies. I. Immunohistochemical analysis of neuropeptides in diabetes mellitus

    DEFF Research Database (Denmark)

    Lindberger, M; Schröder, H D; Schultzberg, M

    1989-01-01

    Standardised skin biopsies followed by immunohistochemical examination for the presence of terminal nerve fibres reacting for neuropeptides substance P (SP) and calcitonin gene-related peptide (CGRP) were evaluated. Healthy subjects regularly displayed free nerve endings of both fibre types...... in the papillary and reticular dermis. Both fibre types were present close to blood vessels, while CGRP immunoreactive fibres were more often encountered near sweat gland acini compared to SP fibres. Diabetes mellitus complicated by polyneuropathy was accompanied by marked reduction of SP and CGRP reactive fibres...... in the dermis layers. Five type I diabetes patients without clinical or neurophysiological evidence of polyneuropathy also had reduced density of both fibre types, being significant for CGRP fibres when compared with controls. Skin biopsy with immunohistochemical staining for neuropeptides may represent...

  4. CARCINOMA PROSTATE HISTOPATHOLOGY IN NEEDLE BIOPSIES INCLUDING REVISED GLEASON’S GRADING AND ROLE OF IMMUNOHISTOCHEMICAL MARKERS

    Directory of Open Access Journals (Sweden)

    Rema Priyadarsini

    2017-05-01

    Full Text Available BACKGROUND Adenocarcinoma of prostate is the most common form of cancer in men accounting for 29% of cancers in developed nations and the incidence of prostatic cancer is 6.4% in males of Trivandrum District. MATERIALS AND METHODS All prostatic biopsies taken per rectally and stained by haematoxylin and eosin. In suspected cases of malignancy immunohistochemical markers, the AMACR P504S and high molecular weight cytokeratin 34E12 were done. RESULTS The total number of cases studied were 142. The final diagnosis with histomorphological features show that maximum cases were prostatic carcinoma constituting 45.5% of the samples received. CONCLUSION All prostatic carcinomas were graded by revised Gleason’s grade (ISUP 2005 and the use of immunohistochemical markers in arriving at a definite diagnosis in carcinoma prostate was confirmed.

  5. Immunohistochemical study on roe deer haemal nodes.

    Science.gov (United States)

    Akaydın Bozkurt, Yeşim; Karadağ Sarı, Ebru; Kabak, Murat

    2017-11-13

    The aim of this study was to investigate the immunohistochemical characteristics of the haemal nodes located in the abdominal and the thoracal cavity in roe deer (Capreolus capreolus). In this study, two adult male and two adult female roe deers in addition to two roe deer foetuses at the late fetal stages were used. The avidin-biotin-peroxidase technique was applied to anti-CD3, anti-CD79αcy, anti-macrophage, anti-S100 primary antibodies. Positive results were gained for all the antibodies used. Many CD3 positive T lymphocytes were seen in the lymphoid tissue areas of the fetal haemal nodes, in the germinal center of the lymph follicles of the adult haemal nodes and in their lymphatic cords. CD79αcy positive cells were less in number while S-100 protein was positive in both lymph follicles and in sinuses of the adult haemal nodes. In fetal haemal nodes, positive reacting cells for S-100 protein were more in number in the sinuses. For the MAC387 primary antibody, there were positive macrophages seen in the capsule and trabecules of the haemal nodes, located denser in males. Macrophage cells in the lymphoid structures and granulocytes in the sinuses of the haemal nodes of both adults and fetuses reacted positive for MAC387. This study is the first one to define the detailed structural features immunohistochemically in the haemal nodes of the roe deer. Even it's concluded that the results were similar with the other ruminants, it's also pointed out that there are certain differences among the fetal, adult male and female haemal nodes of the roe deer.

  6. Histopathological and Immunohistochemical Characterization of Methyl Eugenol-induced Nonneoplastic and Neoplastic Neuroendocrine Cell Lesions in Glandular Stomach of Rats.

    Science.gov (United States)

    Janardhan, Kyathanahalli S; Rebolloso, Yvette; Hurlburt, Geoffrey; Olson, David; Lyght, Otis; Clayton, Natasha P; Gruebbel, Margarita; Picut, Catherine; Shackelford, Cynthia; Herbert, Ronald A

    2015-07-01

    Methyl eugenol induces neuroendocrine (NE) cell hyperplasia and tumors in F344/N rat stomach. Detailed histopathological and immunohistochemical (IHC) characterization of these tumors has not been previously reported. The objective of this study was to fill that data gap. Archived slides and paraffin blocks were retrieved from the National Toxicology Program Archives. NE hyperplasias and tumors were stained with chromogranin A, synaptophysin, amylase, gastrin, H(+)/K(+) adenosine triphosphatase (ATPase), pepsinogen, somatostatin, and cytokeratin 18 (CK18) antibodies. Many of the rats had gastric mucosal atrophy, due to loss of chief and parietal cells. The hyperplasias and tumors were confined to fundic stomach, and females were more affected than the males. Hyperplasia of NE cells was not observed in the pyloric region. Approximately one-third of the females with malignant NE tumors had areas of pancreatic acinar differentiation. The rate of metastasis was 21%, with liver being the most common site of metastasis. Immunohistochemically, the hyperplasias and tumors stained consistently with chromogranin A and synaptophysin. Neoplastic cells were also positive for amylase and CK18 and negative for gastrin, somatostatin, H(+)/K(+) ATPase, and pepsinogen. Metastatic neoplasms histologically similar to the primary neoplasm stained positively for chromogranin A and synaptophysin. Based on the histopathological and IHC features, the neoplasms appear to arise from enterochromaffin-like cells. © 2014 by The Author(s).

  7. [Prospects for using immunohistochemical methods in forensic medical thanatology].

    Science.gov (United States)

    Bogomolov, D V; Bogomolova, I N; Karavaeva, I E

    2009-01-01

    This review of Russian and foreign literature is focused on the use of immunohistochemical methods in forensic medical practice. It shows that forensic medical specialists not infrequently underestimate the value of these techniques. Recommendations are proposed for a more extensive application of immunohistochemical methods in practical and fundamental medico-legal thanatology.

  8. PNEUMOCOCCAL ANTIGEN PERSISTENCE IN SPUTUM FROM PATIENTS WITH COMMUNITY-ACQUIRED PNEUMONIA

    NARCIS (Netherlands)

    BOERSMA, WG; LOWENBERG, A; HOLLOWAY, Y; KUTTSCHRUTTER, H; SNIJDER, JAM; KOETER, GH

    The purpose of this study was to establish the diagnostic value of pneumococcal capsular antigen by comparing this with the results of Gram stain and culture in representative and nonrepresentative sputa during follow-up in patients with community-acquired pneumonia. Antigen was detected by a latex

  9. Basal cell carcinoma vs basaloid squamous cell carcinoma of the skin: an immunohistochemical reappraisal.

    Science.gov (United States)

    Webb, David V; Mentrikoski, Mark J; Verduin, Lindsey; Brill, Louis B; Wick, Mark R

    2015-04-01

    Typical cutaneous basal cell carcinoma (BCC) and squamous cell carcinoma (SCC) are morphologically dissimilar. It is well known, however, that poorly differentiated SCC may assume a basaloid phenotype, complicating the histologic distinction between these 2 neoplasms. Selected immunohistochemical stains have been used in the past to aid in that differential diagnosis. In the current study, additional markers were evaluated to determine whether they would be helpful in that regard. Twenty-nine cases of metatypical (squamoid) BCC (MBCC) and 25 examples of basaloid SCC (BSCC) were studied using the antibodies Ber-EP4 and MOC-31 as well as a plant lectin preparation from Ulex europaeus I (UEA-1). The resulting immunostains were interpreted independently by 3 pathologists, and the results showed that MBCCs demonstrated strong and diffuse staining for Ber-EP4 (25/29) and MOC-31 (29/29). In contrast, BSCCs tended to be only sporadically reactive for both markers (4/25 and 1/25 cases, respectively). Labeling for UEA-1 was observed in almost all BSCCs (24/25), but only 6 of 29 cases of MBCC showed limited, focal staining with that lectin. These data suggest that MOC-31 is a useful marker in the specified differential diagnosis, especially when used together with UEA-1. Copyright © 2015 Elsevier Inc. All rights reserved.

  10. Immunohistochemical expression of GLUT-1, GLUT-3, and carbonic anhydrase IX in benign odontogenic lesions.

    Science.gov (United States)

    Vasconcelos, Roseane Carvalho; de Oliveira Moura, Jamile Marinho Bezerra; Lacerda Brasileiro Junior, Vilson; da Silveira, Éricka Janine Dantas; de Souza, Lélia Batista

    2016-10-01

    Some benign odontogenic lesions have a distinct biological behavior with high recurrence rates and local aggressive behavior. To determine whether glucose transporters proteins (GLUT-1 and GLUT-3) and carbonic anhydrase IX (CA IX) are associated with the development of as dentigerous cyst (DC), odontogenic keratocyst (OK), and ameloblastoma (AM), we evaluated the immunohistochemical expression of these proteins in these lesions. Immunoexpression of GLUT-1, GLUT-3, and CA IX was evaluated semiquantitative fields in each of the 20 cases of OK, AM, and DC. The cases were classified according to the scores: 0 (0% positive cells), 1 (50% of positive cells). The statistical analysis was performed using Pearson's chi-square, Kruskal-Wallis and Mann-Whitney tests. All cases were positive for GLUT-1 and 65% of OK showed scored 3. Staining was diffuse in 90% of OK and 85% of DC cases (P GLUT-3. Staining intensity for anhydrase was higher in the epithelium of DC when compared to OK (P = 0.01). Strong staining was observed in 55% of DC and 20% of OK samples (P = 0.01). These results suggest that GLUT-1 may be involved in the metabolic regulation of glucose in odontogenic lesions studied. In addition, CA IX appears to influence the development of AM, OK, and DC which can explain the differences their biological behavior. © 2016 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  11. Abnormal expression of blood group-related antigens in uterine endometrial cancers.

    Science.gov (United States)

    Tsukazaki, K; Sakayori, M; Arai, H; Yamaoka, K; Kurihara, S; Nozawa, S

    1991-08-01

    The expression of A, B, and H group antigens, Lewis group antigens (Lewis(a), Lewis(b), Lewis(x), and Lewis(y)), and Lc4 and nLc4 antigens, the precursor antigens of both groups, was examined immunohistochemically with monoclonal antibodies in 9 normal endometria, 6 endometrial hyperplasias, and 31 endometrial cancers. 1) A, B and/or H antigens were detected in endometrial cancers at an incidence of 51.6%, while no distinct localization of these antigens was observed in normal endometria. H antigen, the precursor of A and B antigens, was particularly frequently detected in endometrial cancers. 2) An increased rate of expression of Lewis group antigens, particularly Lewis(b) antigen, was observed in endometrial cancers compared with its expression in normal endometria. 3) Lc4 and nLc4 antigens were detected in endometrial cancers at rates of 41.9% and 38.7%, respectively, these expressions being increased compared with those in normal endometria. 4) These results suggest that a highly abnormal expression of blood group-related antigens in endometrial cancers occurs not only at the level of A, B, and H antigens and Lewis group antigens, but also at the level of their precursor Lc4 and nLc4 antigens. 5) Lewis(a), Lewis(b), and Lc4 antigens, built on the type-1 chain, are more specific to endometrial cancers than their respective positional isomers, Lewis(x), Lewis(y), and nLc4 antigens, built on the type-2 chain.

  12. HIV-associated benign lymphoepithelial cysts of the parotid glands confirmed by HIV-1 p24 antigen immunostaining.

    Science.gov (United States)

    Sekikawa, Yoshiyuki; Hongo, Igen

    2017-09-28

    Approximately 1%-10% of patients with HIV infection have been reported to have salivary gland enlargement. Parotid swelling in patients with HIV is often associated with salivary gland disease, including benign lymphoepithelial cysts (BLECs). The presence of BLEC can serve as an indicator of HIV infection, and the diagnosis of HIV-associated BLEC is usually based on clinical course, HIV confirmatory blood testing, such as western blot or viral detection, and imaging studies, but not on biopsies or immunostaining. To exclude other diseases such as tuberculosis and malignant lymphoma and to further improve the diagnostic accuracy of BLEC, the detection of the HIV-1 p24 antigen by immunohistochemistry is a useful diagnostic method. We report a case of a 65-year-old Japanese man with swelling of the parotid glands and HIV-associated BLEC confirmed via HIV-1 p24 immunohistochemical staining. © BMJ Publishing Group Ltd (unless otherwise stated in the text of the article) 2017. All rights reserved. No commercial use is permitted unless otherwise expressly granted.

  13. Expression of vascular endothelial growth factor and proliferation cell nuclear antigen in esophageal carcinoma treated by radiotherapy

    International Nuclear Information System (INIS)

    Wang Yang; He Shaoqin; Shi Xuehui; Li Xiaoqiu; Lu Hongfen; Shi Daren

    2002-01-01

    Objective: To assess the correlation between the expression of vascular endothelial growth factor (VEGF) and proliferation cell nuclear antigen (PCNA) and the outcome of esophageal carcinoma patients treated by radiotherapy. Methods: In 59 esophageal cancer patients, expressions of VEGF and PCNA gene proteins in the biopsy samples obtained by endoscopic examination were assessed by immunohistochemical stain. Correlation between the expression of VEGF and PCNA gene and prognosis and clinical or pathological characters such as gender, stage and histological grade were analyzed. Results: Preliminary study demonstrated that the expression of VEGF and PCNA was not correlated with clinical or pathological characters such as gender, stage and histological grade, while VEGF was an independent prognostic factor for overall survival rate by multivariate analysis. Neither correlation between VEGF and local control nor that between PCNA and local control or overall survival rates was found significant. The correlation between VEGF and PCNA was significantly positive. Conclusions: Expression of VEGF, which can reflect the cell proliferation, may have significant impact on overall survival rate in esophageal carcinoma treated by radiotherapy and is worthy of further study. Although no correlation between PCNA and local control or overall survival rate is found, further study is still needed because of the limited cases alloted

  14. Adversarial Stain Transfer for Histopathology Image Analysis.

    Science.gov (United States)

    Bentaieb, Aicha; Hamarneh, Ghassan

    2018-03-01

    It is generally recognized that color information is central to the automatic and visual analysis of histopathology tissue slides. In practice, pathologists rely on color, which reflects the presence of specific tissue components, to establish a diagnosis. Similarly, automatic histopathology image analysis algorithms rely on color or intensity measures to extract tissue features. With the increasing access to digitized histopathology images, color variation and its implications have become a critical issue. These variations are the result of not only a variety of factors involved in the preparation of tissue slides but also in the digitization process itself. Consequently, different strategies have been proposed to alleviate stain-related tissue inconsistencies in automatic image analysis systems. Such techniques generally rely on collecting color statistics to perform color matching across images. In this work, we propose a different approach for stain normalization that we refer to as stain transfer. We design a discriminative image analysis model equipped with a stain normalization component that transfers stains across datasets. Our model comprises a generative network that learns data set-specific staining properties and image-specific color transformations as well as a task-specific network (e.g., classifier or segmentation network). The model is trained end-to-end using a multi-objective cost function. We evaluate the proposed approach in the context of automatic histopathology image analysis on three data sets and two different analysis tasks: tissue segmentation and classification. The proposed method achieves superior results in terms of accuracy and quality of normalized images compared to various baselines.

  15. Detection Of Concrete Deterioration By Staining

    Science.gov (United States)

    Guthrie, Jr., George D.; Carey, J. William

    1999-09-21

    A method using concentrated aqueous solutions of sodium cobaltinitrite and a rhodamine dye is described which can be used to identify concrete that contains gels formed by the alkali-silica reaction (ASR), and to identify degraded concrete which results in a porous or semi-permeable paste due to carbonation or leaching. These solutions present little health or environmental risk, are readily applied, and rapidly discriminate between two chemically distinct gels; K-rich, Na--K--Ca--Si gels are identified by yellow staining, and alkali-poor, Ca--Si gels are identified by pink staining.

  16. News from the biological stain commission

    DEFF Research Database (Denmark)

    Kiernan, J.A.; Lyon, Hans Oluf

    2008-01-01

    In the three earlier editions of News from the Biological Stain Commission (BSC), under the heading of "Regulatory affairs," the BSC's International Affairs Committee reported on the work of Technical Committee 212, Clinical Laboratory Testing and in Vitro Diagnostic Test Systems of the Internati......In the three earlier editions of News from the Biological Stain Commission (BSC), under the heading of "Regulatory affairs," the BSC's International Affairs Committee reported on the work of Technical Committee 212, Clinical Laboratory Testing and in Vitro Diagnostic Test Systems...

  17. Identification of Cyclospora cayetanensis in stool using different stains.

    Science.gov (United States)

    Negm, A Y

    1998-08-01

    Cyclospora cayetanensis, a newly emerging coccidian protozoa is world-wide in distribution. In the present study, different concentrations and staining techniques were used for identification of Cyclospora. Formol-ether sedimentation and Sheather's sugar flotation were used as concentration techniques and the different stains used were: the modified Ziehl-Neelsen, Giemsa, safranin-methylene blue, modifications of trichrome stain, calcoflour white and finally phenol-auramine. The safranin stain was the best, as it stained all the oocysts of Cyclospora uniformly, besides being rapid and easily applicable in the laboratories. Phenol-auramine stained the oocysts well, where both the wall and internal contents fluoresced brightly. With the calcoflour white stain, only the wall of oocysts took that fluorescent stain. The modified Ziehl-Neelsen stained some of the oocysts well, yet great variability in the staining pattern was noticed. Cyclospora oocysts were not efficiently stained with either trichrome modifications or Giemsa stains.

  18. P53, MAPK, topoisomerase II alpha and Ki67 immunohistochemical expression and KRAS/BRAF mutation in ovarian serous carcinomas.

    Science.gov (United States)

    Sundov, Dinka; Caric, Ana; Mrklic, Ivana; Gugic, Dijana; Capkun, Vesna; Hofman, Irena Drmic; Mise, Branka Petric; Tomic, Snjezana

    2013-02-06

    We investigated the immunohistochemical expression of p53, MAPK, topoisomerase II alpha (topoII alpha) and Ki67 in ovarian serous carcinomas (OSCs) along with mutational analysis for KRAS and BRAF. Eighty one cases of OSCs were reviewed and examined immunohistochemically using antibodies against p53, MAPK, topoII alpha and Ki67. Staining was evaluated as a percentage of immunopositive cells with cut-off levels at 10% for p53 and topoII alpha, and 5% for MAPK. The Ki67 immunoexpression was assessed by means of Olympus Image Analysis System as a percentage of immunopositive cells in 1000 tumor cells. KRAS and BRAF mutational analysis was performed on 73 available microdissected samples. Of 81 cases of OSCs 13.6% were of low-grade and 86.4% were of high-grade morphology. In the high-grade group there was a significantly higher immunoexpression of p53 (P p53 immunopositivity. Although this study is limited by its humble number of low-grade samples, our data fit the proposed dualistic pathway of ovarian carcinogenesis. Mutational analysis for KRAS and BRAF discloses some possible interactions between different tumorigenic pathways of low- and high-grade carcinomas. Immunohistochemical staining for MAPK was not sufficiently sensitive, nor specific, to precisely predict the KRAS mutation. However, it appears to be quite reliable in ruling out a KRAS mutation if the staining is negative. The virtual slide(s) for this article can be found here: http://www.diagnosticpathology.diagnomx.eu/vs/9283563368804632.

  19. Extragonadal malignant germ cell tumors: a clinicopathological and immunohistochemical analysis of 48 cases at a single Chinese institution.

    Science.gov (United States)

    Gao, Yuping; Jiang, Jiyao; Liu, Qiang

    2015-01-01

    Primary extragonadal malignant germ cell tumors (EMGCTs) are rare and characterized by the location in the midline of the body, including mediastinum, CNS, retroperitoneum and coccyx. EMGCTs present with different clinical and biologic characteristics in different tumor locations. Accurately diagnosing MEGCTs would be very difficult by performing on HE staining alone, and requires immunohistochemical verification. This study was to investigate the biological feature of EMGCTs and diagnostic value of immunohistochemical markers OCT3/4, CD117, PLAP, AFP, β-HCG and CD30 in EMGCTs. A retrospective study was performed on 48 patients with EMGCTs. EMGCTs were found to occur predominantly in males, especially for mediastinal MGCTs. The tumor locations included mediastinum, CNS and retroperitoneum. The mediastinum and CNS were the most common sites of EMGCTs. Seminoma/germinomas (64.6%) was the most common histological subtypes of EMGCTs. Chest pain, dyspnea, cough and fever were the most common clinical presentations in mediastinal MGCTs. Headache, visual disturbances, endocrine abnormalities, and signs of increased intracranial pressure were common clinical symptoms in CNS MGCTs. Abdominal mass with or without pain, backache and weight loss were common clinical presentations in retroperitoneal MGCTs. PLAP, CD117 and OCT3/4 were highly expressed in seminomas/gernimomas. CD30, EMA and CK AE1/3 staining were positive in embryonal carcinoma. AFP and β-HCG positive staining are characteristic in yolk sac tumors and choriocarcinoma, respectively. Patients with seminomas/germinomas had a better prognosis than those with NS/G-GCTs. Our finding suggests that the accurate diagnosis of EMGCTs is critical not only for predicting the tumor progression but also for patient management. Immunohistochemical markers have become an important tool in the diagnosis and differential diagnosis of EMGCTs.

  20. Immunohistochemical analysis of CD31, CD36, and CD44 antigens in human omentum.

    Science.gov (United States)

    Yildirim, Ayse; Akkus, Murat; Nergiz, Yusuf; Yuruker, Sinan

    2004-03-01

    Milky spots in the human omental tissue are known to be consisting of lymphocytes, macrophages and mast cells. Our goal was to evaluate the relationship of lymphoid cells and macrophages with vasculature and stromal components. In this study we examined the biopsy specimens obtained from the adult patients whom were operated for different purposes in the General Surgery Department of Dicle University Hospital, Ankara, Turkey. We used CD31 as an endothelial cell marker, CD36 which is known to react with microvascular endothelium and adipocytes, and CD44 which is a hyaluronic acid receptor using an indirect immunoperoxidase technique. We observed that CD31 was mainly reactive with vascular endothelial cells and platelets, CD36 was reactive with microvascular endothelium and adipocytes and CD44 was mainly expressed by the endothelial cells of high endothelial venules, fibroblasts in stromal compartments and by large mononuclear cells. We determined the structural and immunophenotypic features of omental lymphoid tissue components stressing vascular and stromal elements, and we briefly discussed the significance of the expression of these molecules in the determined locations.

  1. An immunohistochemical study of a carcinoma of the parotid gland exhibiting both ductal and acinic cell differentiation.

    Science.gov (United States)

    Smith, J A; Warhol, M J; Brodsky, G L

    1983-03-01

    A 76-year-old man underwent a subtotal parotidectomy for removal of a 3 cm. multicystic mass. The tumor was a salivary gland carcinoma, with both infiltrating and intraductal/intra-acinar components, exhibiting three histologic patterns: cribriform, papillary, and comedo-like. Immunohistochemical stain for keratin by the immunoperoxidase technique was strongly reactive in the vast majority of the tumor cells, indicating ductal differentiation of the tumor. Ultrastructural studies indicated primarily ductal differentiation of the tumor cells, with additional areas of acinous and myoepithelial differentiation.

  2. Cutaneous Squamous Cell Carcinoma Developing from Recessive Dystrophic Epidermolysis Bullosa: A Case Report and an Immunohistochemical Study

    Directory of Open Access Journals (Sweden)

    Akira Tsukada

    2012-09-01

    Full Text Available We describe a 49-year-old Japanese woman with cutaneous squamous cell carcinoma (SCC developing from recessive dystrophic epidermolysis bullosa (RDEB. Interestingly, immunohistochemical staining revealed dense infiltration of CD163+ M2 macrophages and numerous Foxp3+ regulatory T cells (Tregs around the tumor. Since the contribution of immunosuppressive factors (e.g. TGFβ to the carcinogenesis of SCC from RDEB was recently reported, our present findings suggest one of the possible contributions of immunosuppressive cells, such as CD163+ M2 macrophages and Tregs, to the carcinogenesis of SCC from RDEB.

  3. Nerve fibre studies in skin biopsies in peripheral neuropathies. I. Immunohistochemical analysis of neuropeptides in diabetes mellitus

    DEFF Research Database (Denmark)

    Lindberger, M; Schröder, H D; Schultzberg, M

    1989-01-01

    in the papillary and reticular dermis. Both fibre types were present close to blood vessels, while CGRP immunoreactive fibres were more often encountered near sweat gland acini compared to SP fibres. Diabetes mellitus complicated by polyneuropathy was accompanied by marked reduction of SP and CGRP reactive fibres...... in the dermis layers. Five type I diabetes patients without clinical or neurophysiological evidence of polyneuropathy also had reduced density of both fibre types, being significant for CGRP fibres when compared with controls. Skin biopsy with immunohistochemical staining for neuropeptides may represent...... a sensitive tool in evaluation of patients with peripheral neuropathies....

  4. Photoacoustic imaging of port-wine stains

    NARCIS (Netherlands)

    Kolkman, Roy G. M.; Mulder, Miranda J.; Glade, Conrad P.; Steenbergen, Wiendelt; van Leeuwen, Ton G.

    2008-01-01

    BACKGROUND AND OBJECTIVE: To optimize laser therapy of port-wine stains (PWSs), information about the vasculature as well as lesion depth is valuable. In this study we investigated the use of photoacoustic imaging (PAI) to obtain this information. STUDY DESIGN/MATERIALS AND METHODS: PAI uses pulsed

  5. Photoacoustic Imaging of Port-Wine Stains

    NARCIS (Netherlands)

    Kolkman, R.G.M.; Mulder, M.J.; Mulder, Miranda J.; Glade, Conrad P.; Steenbergen, Wiendelt; van Leeuwen, Ton

    2008-01-01

    Background and Objective: To optimize laser therapy of port-wine stains (PWSs), information about the vasculature as well as lesion depth is valuable. In this study we investigated the use of photoacoustic imaging (PAI) to obtain this information. - Study Design/Materials and Methods: PAI uses

  6. A comparative assessment of commonly employed staining ...

    African Journals Online (AJOL)

    Following an increase in the number of reports of Cryptosporidium infections and the problems encountered in detecting these organisms in faecal smears, a comparative assessment of a modification of the Sheather's flotation technique and other commonly employed staining procedures proved the modified Sheather's ...

  7. A comparative assessment of commonly employed staining ...

    African Journals Online (AJOL)

    1991-03-16

    Mar 16, 1991 ... methylene blue;8 fluorescence (auramine-phenoI9 and direct immunofluorescence1o. • ll. ); negative staining (periodic acid-. Schiff12. ); and flotation (Sheather's ..... using a direct immunofluorescence assay. Pediatr Infect Dis 1986; 5: 139-142. 12. Horen WP. Detection of Cryptosporidium in human faecal ...

  8. The Language of Stained-Glass Windows

    Science.gov (United States)

    Brew, Charl Anne

    2010-01-01

    The splendor and beauty of stained glass punctuates any room. In this article, the author describes a cross-curriculum project which incorporated the French classes' research and written study of France in the Middle Ages. For the project the author suggested Sainte-Chapelle which is considered a reliquary and was built by Louis IX to house the…

  9. Corneal staining after treatment with topical tetracycline

    NARCIS (Netherlands)

    Lapid-Gortzak, Ruth; Nieuwendaal, Carla P.; Slomovic, Allan R.; Spanjaard, Lodewijk

    2006-01-01

    PURPOSE: The purpose of this paper is to report a case of corneal staining after treatment with topical tetracycline. METHODS: A patient with crystalline keratopathy caused by Streptococcus viridans after corneal transplantation was treated topically with tetracycline eye drops, based on results of

  10. Immunohistochemical visualization of mouse interneuron subtypes

    DEFF Research Database (Denmark)

    Jensen, Simon Mølgaard; Ulrichsen, Maj; Boggild, Simon

    2014-01-01

    of the hippocampus where they have previously been described. Additionally, the antibodies were also tested on sections from mouse spinal cord with similar criteria for specificity of the antibodies. Using the antibodies with a high rating on pAbmAbs, stainings with high signal-to-noise ratios and location......The activity of excitatory neurons is controlled by a small, but highly diverse population of inhibitory interneurons. These cells show a high level of physiological, morphological and neurochemical heterogeneity, and play highly specific roles in neuronal circuits. In the mammalian hippocampus...

  11. Effect of Antigen Retrieval Methods on Nonspecific Binding of Antibody-Metal Nanoparticle Conjugates on Formalin-Fixed Paraffin-Embedded Tissue.

    Science.gov (United States)

    Zhang, Yuying; Wang, Xin-Ping; Perner, Sven; Bankfalvi, Agnes; Schlücker, Sebastian

    2018-01-02

    Immunohistochemical analysis of formalin-fixed paraffin-embedded (FFPE) tissues provides important diagnostic and prognostic information in pathology. Metal nanoparticles (NPs) and, in particular, surface-enhanced Raman scattering (SERS) nanotags as a new class of labeling reagents are promising to be used for multiplexed protein profiling on tissue sections. However, nonspecific binding of NPs onto the tissue specimens greatly hampers their clinical applications. In this study, we found that the antigen retrieval method strongly influences the extent of nonspecific binding of the antibody-SERS NP conjugates to the tissue. Our SERS labels comprised ca. 70 nm Au nanostars coated with ethylene glycol-modified Raman reporter molecules for hydrophilic stabilization and subsequent covalent bioconjugation to antibodies. We systematically investigated the influence of heat- and protease-induced epitope retrieval (HIER and PIER, respectively) on the immunostaining quality of prostate-specific antigen (PSA) on human prostate tissue sections. The best staining results were obtained with PIER. Pretreatment of the tissue sections by HIER led to selective but nonspecific adsorption of the antibody-Au nanostar conjugates onto epithelial cells, while enzymatic treatment within PIER did not. In addition to gold nanostars, also other types of metal NPs with different shapes and sizes (including ca. 20 nm quasi-spherical Au NPs and ca. 60 nm quasi-spherical Au/Ag nanoshells) as well as tissue sections from different organs (including prostate and breast) were tested; in each case the same tendency was observed, i.e., PIER yielded better results than HIER. Therefore, we recommend PIER for future NP-based tissue immunostaining such as immuno-SERS microscopy. Alternatively, for antigens that can only be unmasked by heating, PEGylation of the NPs is recommended to avoid nonspecific binding.

  12. Effect of radiation on the expression of tumor-associated antigens of human lung adenocarcinoma cells

    International Nuclear Information System (INIS)

    Hareyama, Masato

    1988-01-01

    We studied the effects of irradiation on the expression of a tumor-associated antigen (YH206 antigen) of cultured human lung adenocarcinoma A549 cells by using enzyme-linked immunosorbent assay (ELISA) and flow cytometry. YH206 antigen is preferentially expressed on adenocarcinoma cells. Irradiation of A549 cells remarkably increased the expression of YH206 antigen on the cell surface and the level of the antigen in the culture supernatant as well as in the cell lysate, whereas it significantly affected the expression of HLA (MHC-class I) antigen on the same cells. The expression of HLA antigen on the cell was also increased after treatment of the cells with interferon-γ. In an additional experiment, cells were stained simultaneously for surface antigens (fluorescein coupled antibodies) and for DNA content (propidium iodide), and then dual parameter measurements were performed by flow cytometry to analyse the relationship between antigen levels and the cell cycle. YH206 antigen and HLA antigen increased more in the S and G 2 /M phases of the cell cycle than in G 0 /G 1 . The expression of YH206 antigen was enhanced in the S and G 2 /M phases by irradiation, whereas the expression of HLA antigen was enhanced in each phase of the cell cycle with irradiation or IFN. These results suggest that irradiation plays a key role in the change of the expression of certain tumor-associated antigens. (author)

  13. Effects of nicotine on bone during orthodontic tooth movement in male rats. Histological and immunohistochemical study.

    Science.gov (United States)

    Bakathir, Manal A; Linjawi, Amal I; Omar, Samia S; Aboqura, Ahad B; Hassan, Ali H

    2016-10-01

    To investigate the effects of nicotine on orthodontic tooth movement and accompanying histological and immunohistochemical changes in rats. An experimental study conducted at King Abdulaziz University, Jeddah, Saudi Arabia between 2013 and 2014. Thirty-two rats randomly divided into 4 groups. Three were experimental, received daily nicotine injections: group A: 0.37 mg/kg, group B: 0.57 mg/kg, and group C: 0.93 mg/kg. The control group  (group D) received a daily injection of 0.5 mL saline. All rats were subjected to 30 g of orthodontic force on the maxillary left first molars and incisors using a nickel-titanium closed-coil spring. The distance between the 2 teeth was assessed before and after 14 days of force application. Histological, immunohistochemical, and histomorphometric assessments were performed on sections from groups C and D.  Groups C (p less than 0.001) and D (p less than 0.001) showed the significantly greatest and least amounts of tooth movement . The results were statistically dose-dependent. Unbalanced resorption-apposition bone remodeling patterns and increased osteoclast cell distribution were observed in the nicotine group with significantly smaller percentages of bone surface areas mesially and distally (p less than 0.05). Immunohistochemical stains showed low alkaline phosphatase activity and intense tartrate-resistant acid phosphatase activity in the nicotine group.  Nicotine accelerated orthodontic tooth movement with unbalanced bone resorption and apposition patterns around the moving teeth.

  14. EGFR, p53, IDH-1 and MDM2 immunohistochemical analysis in glioblastoma: therapeutic and prognostic correlation

    Directory of Open Access Journals (Sweden)

    Richard Murdoch Montgomery

    2015-07-01

    Full Text Available We studied 36 glioblastoma cases at HC-UNICAMP from 2008 to 2012 and classified the immunohistochemical distribution of the wild-type epidermal growth factor receptor (EGFR, mutated forms of p53 protein and isocitrate dehydrogenase-1 (IDH-1 and murine double protein 2 (MDM2. Immunostaining findings were correlated with clinical data and response to treatment (surgery, chemotherapy and radiotherapy. About 97% of the tumors were primary, most of them localized in the frontal lobe. Mean time free of clinical or symptomatic disease and free time of radiological disease were 7.56 and 7.14 months, respectively. We observed a significant positive correlation between expressions of p53 and MDM2, EGFR and MDM2. Clinical, radiological and overall survivals also showed a significant positive correlation. p53 staining and clinical survival showed a significant negative correlation. The current series provides clinical and histopathological data that contribute to knowledge on glioblastoma in Brazilians.

  15. Molecular cloning of canine Wilms' tumor 1 for immunohistochemical analysis in canine tissues.

    Science.gov (United States)

    Sakai, Osamu; Sakurai, Masashi; Sakai, Hiroki; Kubo, Masahito; Hiraoka, Hiroko; Baba, Kenji; Okuda, Masaru; Mizuno, Takuya

    2017-07-28

    Wilms' tumor 1 (WT1) expression has been investigated in various human cancers as a target molecule for cancer immunotherapy. However, few studies have focused on WT1 expression in dogs. Firstly, cDNA of canine WT1 (cWT1) was molecularly cloned from normal canine kidney. The cross-reactivity of the anti-human WT1 monoclonal antibody (6F-H2) with cWT1 was confirmed via Western blotting using cells overexpressing cWT1. Immunohistochemical staining revealed that cWT1 expression was detected in all canine lymphoma tissues and in some normal canine tissues, including the kidney and lymph node. cWT1 is a potential immunotherapy target against canine cancers.

  16. Chronic and delayed mustard gas keratopathy: a histopathologic and immunohistochemical study.

    Science.gov (United States)

    Kanavi, Mozhgan Rezaei; Javadi, Atefeh; Javadi, Mohammad Ali

    2010-01-01

    To specify histopathologic and immunohistochemical features of chronic and delayed mustard gas keratopathy. Corneal buttons from patients with chronic and delayed mustard gas keratopathy were examined for routine histopathology, special histologic stainings, and immunohistochemistry for CD31 and CD68. Twenty-five corneal buttons from 25 patients with chronic and delayed mustard gas keratopathy were evaluated. Irregular epithelial thickness (100%), degenerative changes (24) (96%), thickened epithelial basement membrane (23) (92%), keratocytes loss (18) (72%), and destroyed Bowman layer (18) (72%) were predominant histopathologic features. Amyloid degeneration was the most commonly observed degenerative change in the specimens (83%). Immunoreactivity for CD68 and CD31 was detected in 88% and 56%, respectively. In this observational case series, although all corneal layers from epithelium to the endothelium were involved from mild to severe degrees, the anterior corneal layers were more affected on histopathology than the posterior parts in chronic and delayed mustard gas keratopathy.

  17. Macrophage response in experimental third-degree skin burns treated with allograft. Histological and immunohistochemical study.

    Science.gov (United States)

    Popescu, Florina Carmen; Mogoşanu, G D; Busuioc, Cristina Jana; Pârvănescu, H; Lascăr, I; Mogoantă, L

    2012-01-01

    Macrophages are some of the innate immune cells with a central role in inflammatory and immune responses. Studies in the last 20 years have shown that these cells have a particular influence in the reparative processes also. Our aim in this study was to evaluate the macrophage response in third-degree skin burns treated with allograft in an experimental model. Macrophages were specifically highlighted by immunohistochemical staining with anti-CD68 antibody. In the first evolutive part of the reparatory process, macrophages rapidly increased both numerically and as a relative area with about 300%, and then decreased progressively along with the granulation tissue maturation. Macrophage overall response curve was similar in animals treated with allograft and in the control group (untreated), which leads us to believe that the allograft does not induce a more ample immune response that could be regarded as pathological.

  18. Bone marrow stroma in idiopathic myelofibrosis and other haematological diseases. An immunohistochemical study

    DEFF Research Database (Denmark)

    Lisse, I; Hasselbalch, H; Junker, P

    1991-01-01

    Bone marrow stroma was investigated immunohistochemically in 31 patients with haematological diseases, mainly idiopathic myelofibrosis (n = 8) and related chronic myeloproliferative disorders (n = 14). The bone marrow from patients with idiopathic myelofibrosis and some CML patients showed marked...... staining reactions with antibodies against type III procollagen (pN collagen), type IV collagen, fragment P1 of laminin and factor VIII. Patients with osteomyelosclerosis had particularly increased collagen content, including both newly deposited type III collagen (pN collagen) and mature collagen fibres....... As in normal bone marrow, argyrophilic fibres and type III collagen displayed a close co-distribution, which was also demonstrated for type IV collagen and laminin. While normal bone marrow sinusoids had discontinuous basement membranes, fibrosing bone marrow was characterized by endothelial cell proliferation...

  19. Immunohistochemical analysis of IL-1 beta in the discs of patients with temporomandibular joint dysfunction.

    Science.gov (United States)

    Almeida, Luis Eduardo; Pierce, Sean; Zacharias, Joseph; Cullinan, William; Noronha, Lucia; Olandoski, Marcia; Tramontina, Vinicius; Loreto, Carla; Leonardi, Rosalia

    2017-07-01

    Interleukin-1 beta (IL-1β) is a cytokine that participates in the regulation of immune responses and inflammatory reactions. It is hypothesized that IL-1 levels may be elevated in patients suffering from temporomandibular joint dysfunction. The purpose of this study was to determine the association of IL-1β expression with TMD using an immunohistochemical approach to evaluate the joint disc. A total of 39 human temporomandibular joint disc samples were collected, with 31 samples in the test group. Nineteen of the test group samples were from discs of patients with anterior disc displacement with reduction, and 12 of the samples were from patients with anterior disc displacement without reduction. Eight control samples were used in the control group. The samples were immunostained and evaluated on both quantity and intensity of staining. There was a statistically significant difference (p dysfunctions.

  20. Immunohistochemical expression of interleukin 8 in skin biopsies from patients with inflammatory acne vulgaris

    Directory of Open Access Journals (Sweden)

    El Maged Rabee A

    2007-01-01

    Full Text Available Abstract Background This study was conducted to evaluate the immunohistochemical (IHC expression of interleukin 8 (IL-8 in skin biopsies of inflammatory acne vulgaris (IAV in an attempt to understand the disease pathogenesis. Materials and methods A total of 58 biopsies, 29 from lesional IAV and 29 normal non lesional sites were immunostained for IL-8. The intensity of staining was evaluated in the epidermis and dermis and was scored as mild, moderate and severe. The expression was correlated with the clinical grade, disease course and histological changes. Results IL-8 immunoreactivity was expressed in lesional IAV compared to non lesional skin biopsies (p Conclusion We were able to demonstrate altered immunoreactivity of IL-8 in IAV compared to normal skin. Targeted therapy to block IL-8 production may hold promise in limiting the deleterious effects of IL-8-mediated inflammatory response and angiogenesis.

  1. Vocal fold nodules: morphological and immunohistochemical investigations.

    Science.gov (United States)

    Martins, Regina Helena Garcia; Defaveri, Julio; Custódio Domingues, Maria Aparecida; de Albuquerque E Silva, Rafael; Fabro, Alexandre

    2010-09-01

    The objective of this study was to investigate the morphological and immunohistochemical characteristics of vocal fold nodules. The study design was prospective and retrospective. For the histological study, we reviewed 15 slides from the surgical cases of vocal fold nodules, in which we analyzed epithelium, basal membrane (bm), and lamina propria. For the transmission and scanning electron microscopy (TEM, SEM) studies, five new cases on vocal fold nodules were included. Immunohistochemistry study was carried out in the 15 specimens, using antifibronectin, antilaminin, and anticollagen IV antibodies. The main histological alterations were epithelial hyperplasia (73.33%), basement membrane thickening (86.66%), edema, and fibrosis (93.33%). SEM--reduction in mucous lacing and increase in the desquamating cells, without epithelial erosion. TEM--hyperplasia of the epithelium, enlargement of the intercellular junctions, which was filled by fluid, subepithelial thickening of the lamina reticularis, and break points in the basal membrane. Immunohistochemistry--we identified greater immunoexpression of fibronectin on the basal membrane, on the lamina propria, and around the vessels. Antilaminin and anticollagen IV antibodies showed higher pigmentation on the endothelium of the vessels than that on the basal membrane. In vocal fold nodules, combined assessment using light microscopy, electron microscopy, and immunohistochemistry can reveal important morphological details useful in characterizing these lesions. 2010 The Voice Foundation. Published by Mosby, Inc. All rights reserved.

  2. Immunohistochemical markers of cancerogenesis in the lung.

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    Lech Chyczewski

    2007-06-01

    Full Text Available Lung cancer is the leading cause of cancer deaths for people of both sexes worldwide. Early diagnosis of precancer lesions may be of crucial significance to lowering lung cancer mortality. The World Health Organization has defined three preneoplastic lesions of the bronchial epithelium: squamous dysplasia and carcinoma in situ, atypical adenomatous hyperplasia and diffuse idiopathic pulmonary neuroendocrine cell hyperplasia. These lesions are believed to progress to squamous cell carcinoma, adenocarcinoma and carcinoid tumors, respectively. Apart from WHO classification, two other lesions such as bronchiolization and bronchiolar columnar cell dysplasia (BCCD can be observed and thought to be preneoplastic lesions leading to adenocarcinoma. In this review we summarize the data of morphological and cell cycle related proteins changes in both central and peripheral compartments of lung. Many molecular changes, which accompany the multistep process of the development of invasive types of cancer, may be observed thanks to the application of immunohistochemical markers. A deeper knowledge of molecular and genetic changes accompanying pre-cancer states may show new directions of early diagnostics of cancer development.

  3. Immunohistochemical Expression of Podoplanin in Clinical Variants of Oral Leukoplakia and Its Correlation With Epithelial Dysplasia.

    Science.gov (United States)

    D'souza, Brendan; Nayak, Ramakant; Kotrashetti, Vijayalakshmi S

    2018-02-01

    Oral leukoplakia is the most common premalignant lesion of the oral cavity and is associated with development of oral squamous cell carcinoma. Certain changes at cellular and molecular level are important indicators for transformation into carcinoma. Podoplanin, a transmembrane glycoprotein is involved in the cytoskeletal remodeling and increased motility of the cell which helps in determining the malignant potential of oral leukoplakic lesions. The objective of the study was to determine immunohistochemically the expression of podoplanin in homogenous (HOL) and nonhomogenous oral leukoplakia (NHOL) and to compare the expression with clinicopathological parameters. Study group included 15 cases each of HOL, NHOL and control group included 15 healthy volunteers. Both tissues were immunohistochemically stained for podoplanin (D2-40) antibody. No statistical significant difference was observed between the study and control groups for expression of podoplanin but significant difference was observed on comparison of podoplanin scores between HOL and NHOL. Statistical significant difference was observed when the podoplanin expression in the epithelium and the lymphatic vessel density were correlated with the histologic grading of HOL and NHOL. Expression of podoplanin was greater in NHOL as compared with HOL, this supports the fact that NHOL has a greater risk of malignant transformation when compared with HOL. Podoplanin expression, lymphangiogenesis, and lymphatic vessel density increased with increasing grades of dysplasia, suggesting that cellular modeling and motility is increased as the grade of dysplasia advances. Thus suggesting podoplanin can be used as a prognostic marker to determine the malignant potential in oral leukoplakias.

  4. Ultra-small particles of iron oxide as peroxidase for immunohistochemical detection

    International Nuclear Information System (INIS)

    Wu Yihang; Song Mengjie; Zhang Xiaoqing; Zhang Yu; Wang Chunyu; Gu Ning; Xin Zhuang; Li Suyi

    2011-01-01

    Dimercaptosuccinic acid (DMSA) modified ultra-small particles of iron oxide (USPIO) were synthesized through a two-step process. The first step: oleic acid (OA) capped Fe 3 O 4 (OA-USPIO) were synthesized by a novel oxidation coprecipitation method in H 2 O/DMSO mixing system, where DMSO acts as an oxidant simultaneously. The second step: OA was replaced by DMSA to obtain water-soluble nanoparticles. The as-synthesized nanoparticles were characterized by TEM, FTIR, TGA, VSM, DLS, EDS and UV-vis. Hydrodynamic sizes and Peroxidase-like catalytic activity of the nanoparticles were investigated. The hydrodynamic sizes of the nanoparticles (around 24.4 nm) were well suited to developing stable nanoprobes for bio-detection. The kinetic studies were performed to quantitatively evaluate the catalytic ability of the peroxidase-like nanoparticles. The calculated kinetic parameters indicated that the DMSA-USPIO possesses high catalytic activity. Based on the high activity, immunohistochemical experiments were established: using low-cost nanoparticles as the enzyme instead of expensive HRP, Nimotuzumab was conjugated onto the surface of the nanoparticles to construct a kind of ultra-small nanoprobe which was employed to detect epidermal growth factor receptor (EGFR) over-expressed on the membrane of esophageal cancer cell. The proper sizes of the probes and the result of membranous immunohistochemical staining suggest that the probes can be served as a useful diagnostic reagent for bio-detection.

  5. Fine needle aspiration of primary mediastinal synovial sarcoma: cytomorphologic, immunohistochemical, and molecular study.

    Science.gov (United States)

    Huang, Cheng Cheng; Michael, Claire W; Pang, Judy C

    2014-02-01

    The cytologic diagnosis of synovial sarcoma (SS) can be difficult when it occurs in unusual locations, atypical age groups, and/or have unusual morphology. We report a case of primary mediastinal SS in a 65-year-old male with a long smoking history who presented with increasing shortness of breath and was found to have a 14.2 cm mediastinal mass. Smears from the endobronchial ultrasound guided fine needle aspiration of the mass were moderately cellular consisting of loosely cohesive clusters, some of which demonstrated nuclear molding, and dispersed single cells. The relatively uniform tumor cells had a high nuclear-to-cytoplasmic ratio, finely granular chromatin, and inconspicuous nucleoli. Some of the single cells had spindled morphology with unipolar wispy tails and naked nuclei. Based on the clinical presentation and the cytomorphologic features, our initial differential diagnoses included atypical carcinoid, small cell carcinoma, basaloid squamous cell carcinoma, sarcoma, and lymphoma. Immunohistochemical studies on the cell block sections revealed that the tumor cells were focally positive for cytokeratin and diffusely positive for CD56, while negative for CD45, synaptophysin and chromogranin. Ultimately, an immunohistochemical stain for TLE-1 demonstrated diffusely strong nuclear positivity and molecular studies showed the presence of the t(X; 18) SYT/SSX1 translocation confirming the diagnosis of SS. In this report, we describe the cytomorphologic features of SS, its diagnostic pitfalls, and potential mimics in the mediastinum. Copyright © 2012 Wiley Periodicals, Inc.

  6. Immunohistochemical Detection of Changes in Tumor Hypoxia

    International Nuclear Information System (INIS)

    Russell, James; Carlin, Sean; Burke, Sean A.; Wen Bixiu; Yang, Kwang Mo; Ling, C. Clifton

    2009-01-01

    Purpose: Although hypoxia is a known prognostic factor, its effect will be modified by the rate of reoxygenation and the extent to which the cells are acutely hypoxic. We tested the ability of exogenous and endogenous markers to detect reoxygenation in a xenograft model. Our technique might be applicable to stored patient samples. Methods and Materials: The human colorectal carcinoma line, HT29, was grown in nude mice. Changes in tumor hypoxia were examined by injection of pimonidazole, followed 24 hours later by EF5. Cryosections were stained for these markers and for carbonic anhydrase IX (CAIX) and hypoxia-inducible factor 1α (HIF1α). Tumor hypoxia was artificially manipulated by carbogen exposure. Results: In unstressed tumors, all four markers showed very similar spatial distributions. After carbogen treatment, pimonidazole and EF5 could detect decreased hypoxia. HIF1α staining was also decreased relative to CAIX, although the effect was less pronounced than for EF5. Control tumors displayed small regions that had undergone spontaneous changes in tumor hypoxia, as judged by pimonidazole relative to EF5; most of these changes were reflected by CAIX and HIF1α. Conclusion: HIF1α can be compared with either CAIX or a previously administered nitroimidazole to provide an estimate of reoxygenation

  7. Immunofluorescence Staining — EDRN Public Portal

    Science.gov (United States)

    Direct immunofluorescence method is used to detect the deposit of immunoglobulins, complement components, fibrinogen, etc. in tissues. This technique is usually performed on frozen sections. The primary antibody is conjugated to fluorescein binds directly with the antigen and can be detected by the fluorescent tag using a fluorescent microscope.

  8. Salivary Duct Carcinoma and Invasive Ductal Carcinoma of the Breast: A Comparative Immunohistochemical Study.

    Science.gov (United States)

    Jalaly, Jalal B; Sanati, Souzan; Chernock, Rebecca D; Dibe, Dikson G; El-Mofty, Samir K

    2018-01-04

    Salivary duct carcinoma (SDC) is a high-grade salivary gland malignancy with great morphological resemblance to invasive ductal carcinoma (IDC) of the breast. Rarely, female patients may have a past history of both SDC and IDC. When these patients present with distant metastasis, accurate identification of the primary tumor is particularly difficult. Additionally, rare metastasis of SDC to the breast and IDC to the salivary (parotid) gland can also present a diagnostic challenge. Our aim was to develop an immunohistochemical panel that reliably distinguishes SDC from IDC. We included all SDCs diagnosed from 1989 to 2016 (23 cases) and 29 treatment naïve and histologically similar IDCs. All cases were stained with androgen receptor (AR), estrogen receptor-alpha (ER-α), progesterone receptor (PR), HER-2, CK5/6, p63, and beta-catenin. The great majority (> 90%) of both SDCs and IDCs reacted positively to AR. The main discrepancy in the immunohistochemical profiles was a distinctly different reactivity to ER-α, PR and HER-2. While 28 IDCs (96.6%) reacted positively to ER-α and/or PR, the majority expressing both (82.8%) with a moderate to strong staining intensity, only 2 SDCs expressed ER-α (8.7%) and 5 others expressed PR (21.7%) with only one case expressing both (P value SDC (34.8%) were positive for HER-2 while none of the IDCs were positive (P value SDC from IDC. Positive reactivity to ER-α, PR or both and negative HER-2 favors a diagnosis of IDC while ER-α, PR negative, HER-2 positive tumors are more likely SDC.

  9. American Tegumentary Leishmaniasis: Effectiveness of an Immunohistochemical Protocol for the Detection of Leishmania in Skin

    Science.gov (United States)

    Alves, Cibele Fontes; Alves, Cintia Fontes; Figueiredo, Maria Marta; Souza, Carolina Carvalho; Machado-Coelho, George Luiz Lins; Melo, Maria Norma; Tafuri, Washington Luiz; Raso, Pedro; Soares, Rodrigo Pedro; Tafuri, Wagner Luiz

    2013-01-01

    Background American tegumentary leishmaniasis (ATL) is endemic in Latin America, where Brazil has over 27 thousand cases per year. The aim of the present study was to develop an immunohistochemical method (IHC) for ATL diagnosis. For this purpose, we used serum from a dog naturally infected with Leishmania (L) infantum (canine hyperimmune serum) as the primary antibody, followed by a detection system with a secondary biotinylated antibody. Methodology Skin samples were obtained from 73 patients in an endemic area of Caratinga, Minas Gerais (MG) State, Brazil all testing positive for ATL with the Montenegro skin test, microscopy, and PCR. Canine hyperimmune serum of a dog naturally infected with Leishmania (L.) infantum was employed as a primary antibody in an immunohistochemical diagnostic method using streptavidin-biotin peroxidase. To assess the specificity of this reaction, IHC assays employing two monoclonal antibodies were carried out. As the polymer-based technology is less time-consuming and labor intensive than the IHC labeled streptavidin-biotin peroxidase method, we compared the two methods for all samples. Results The IHC method detected ATL in 67 of the 73 cases (91.8%). Immunolabeled parasites were primarily detected inside macrophages either in the superficial or the deep dermis. Detection was facilitated by the high contrast staining of amastigotes (dark brown) against the light blue background. A lower detection rate (71.2%) was observed with the both of the monoclonal Leishmania antibodies compared to the canine hyperimmune serum. This may have been due to a non-specific background staining observed in all histological samples rendering positive detection more difficult. The higher efficacy of the canine hyperimmune serum in the IHC method was confirmed by the method using streptavidin-biotin peroxidase as well as that with the polymer-based technology (biotin-avidin-free system). Conclusions The data are encouraging with regard to validating IHC

  10. Solid cell nests of the thyroid gland: morphological, immunohistochemical and genetic features.

    Science.gov (United States)

    Manzoni, Marco; Roversi, Gaia; Di Bella, Camillo; Pincelli, Angela I; Cimino, Vincenzo; Perotti, Mario; Garancini, Mattia; Pagni, Fabio

    2016-05-01

    The correct identification of solid cell nests (SCNs) is an important issue in thyroid pathology because of the spectrum of differential diagnoses of this type of lesion. Ten cases of 295 consecutive thyroidectomies showed the presence of SCNs at histological examination. The identification of the exact SCN type required the distinction of the cystic and solid pattern; SCNs were usually composed of a mixture of main cells (MCs) and C-cells (CCs). The immunohistochemical calcitonin stain identified CCs easily, both inside SCNs and dispersed in islets at the periphery. For the characterization of MCs, we added the utility of p40 to p63. The use of thyroid transcription factor-1 (TTF-1) helped in their identification, as MCs did not react with this marker; the combination of TTF-1 and p40 or p63 IHC stains was useful for the characterization of cystic SCNs of both types 3 and 4. The negativity of mouse monoclonal mesothelioma antibody (HMBE-1) and a very low proliferative index (MIB-1) supported the diagnosis. [Correction added on 23 November 2015, after online publication: MIB-1 was incorrectly defined, the expanded form was deleted.] We discourage the use of galectin-3 (Gal-3) and cytokeratin-19 (CK-19), as they have an important overlap with papillary thyroid carcinoma. The complete absence of any B-Raf proto-oncogene, serine/threonine kinase (BRAF) mutations is an additional fundamental finding. We reviewed the most relevant morphological and immunohistochemical features of SCNs and have provided a genetic analysis of the BRAF gene because of its expanding use in thyroid pathology. © 2015 John Wiley & Sons Ltd.

  11. Immunohistochemical expression of HER-2/neu in patients with lung carcinoma and its prognostic significance

    International Nuclear Information System (INIS)

    Petrusevska, G.; Banev, S.; Ilievska-Poposka, B.; Smickova, S.; Spirovski, Z.

    2004-01-01

    Background. The HER-2 protein or p185her2 is a membrane receptor with tyrosine kinase activity encoded by HER-2/neu gene. Overexpression of HER-2/neu has been observed in many human cancers, including lung cancer. In the study, the expression of HER-2 protein is determined in the spectrum of lung cancer (adenocarcinoma, squamous cell carcinoma and small cell carcinoma). Patients and methods. The study population consisted of two groups: 19 patients that had undergone surgical treatment and 10 patients that had undergone fiber-optic bronchoscopy and biopsy for primary diagnosis only. Tissue specimens were neutral formaldehyde-fixed and paraffin-embedded. Standard histochemical and immunohistochemical staining were used for diagnosis. Expression of HER-2/neu protein was determined by immunohistochemical staining with Hercep Test (DAKO). The results were graded 0-1 as negative and 2-3 as positive. Results. Overall incidence of HER-2/neu overexpression was 34.4% (10 of 29). Higher incidence was found in the patients with adenocarcinoma 45.4% (5 of 11). In squamous cell carcinoma and small cell carcinoma, the overexpression incidence was 30.7% (4 of 13) and 20% (1 of 5), respectively. No statistically significant difference was seen given the age and gender. HER-2/neu overexpression was more pronounced in the patients with advanced tumour: all patients with squamous cell carcinoma and HER-2/neu overexpression had stage IIIB and stage IV disease, while 80 % of adenocarcinoma patients with HER-2/neu overexpression had stage IIIA and IIIB disease. Conclusions. These results are satisfactory and encourage us to continue this work in the follow-up study to evaluate HER-2/neu role as predictive and prognostic factor for the patients with lung cancer. (author)

  12. Histomorphological and immunohistochemical characterization of 172 cutaneous round cell tumours in dogs

    Directory of Open Access Journals (Sweden)

    Marina Rios Araújo

    2012-08-01

    Full Text Available This paper describes the use of a panel of antibodies (CD117, CD3, CD79a, CD45, cytokeratin, vimentin and E-cadherin on formalin-fixed, paraffin-embedded sections of canine cutaneous round cell tumours. Neoplastic tumours were diagnosed by histology and histochemical stains and included 107 mast cell tumours, 31 cutaneous histiocytomas, two localized histiocytic sarcomas, 21 cutaneous lymphomas, three plasma cell tumours, one transmissible venereal tumour and seven unclassified round cell tumours. The histologic diagnosis was modified in 39.5% of the total 172 neoplasms. The staining for CD45 and Ecadherin were variable, and therefore, the final diagnoses of cutaneous histiocytoma and localized histiocytic sarcoma were made based on histology in association with negative results for CD3, CD79a, CD117 and cytokeratin. The cellular origin of unclassified round cell tumours was defined in all cases. Cutaneous B-cell lymphoma and plasma cell tumours were CD79a-positive and could be distinguished from each other by the morphological characteristics. Mast cell tumours and T cell lymphoma were CD117 and CD3 positive, respectively. The positive staining for vimentin and the negative staining for CD3, CD79a, CD117 and cytokeratin favoured the diagnosis of transmissible venereal tumours. Thus, the final diagnosis of cutaneous round cell tumours should be based on the interpretation of immunohistochemical results together with the cellular morphology observed by histology. Therefore, more studies to optimize the specific markers in formalin-fixed, paraffinembedded tissues (especially for histiocytes are required for definitive diagnosis of round cell tumours in dogs.

  13. Histomorphological spectrum and immunohistochemical characterization of hemangioblastomas: An entity of unclear histogenesis

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    Sridhar Epari

    2014-01-01

    Full Text Available Introduction: Hemangioblastomas (HBs are rare WHO grade I neoplasms of uncertain histogenesis. Most are sporadic and association with von Hippel-Lindau disease (VHL is uncommon. Materials and Methods: Histomorphological and immunohistochemical evaluation of 24 cases of HBs was done. Results: Age range was 15-68 yrs (median: 30 yrs with male:Female of 1.2:1 (M-13; F-11. Cerebellum was commonest location (n = 20, one each was seen in brain stem, cervical spinal cord, fourth ventricle and frontal lobe, respectively. VHL association was noted in 5 cases. Four cases were recurrent in nature of which 3 were in association with vHL. Histologically, reticular variant was the predominant subtype (n = 15, 5 were of cellular variant and 4 were mixed. Nuclear pleomorphism, nuclear cytoplasmic inclusions, cytoplasmic vacuolation were noted in the stromal cells in varying proportions. Immunohistochemical evaluation was successful in only 11 cases and of which 8 showed stromal cell positivity for alpha-inhibin. CD56 (NCAM, Nestin and synaptophysin positivity was seen in 6, 7 and 4 cases, respectively. Nestin positivity was noted in stromal cells only and no reactivity with the endothelial cells seen. S-100 protein and NSE positivity was seen in 8 and 10 cases, respectively. Glial fibrillary acidic protein (GFAP showed two distinct patterns of immunoreactivity - scattered stromal cell positivity (n:5 and pattern of reactive astrogliosis positivity (n:10. CD44 positivity was noted in 5 cases. VEGF and EGFR positivity was seen in 5 cases each. None of the cases showed positivity for epithelial membrane antigen and no stromal cells in any of the cases showed positivity for CD34 and CD31. Conclusion: HBs can occur in throughout the neuroaxis. Cerebellum is the commonest site of occurrence for HBs and uncommonly can occur in the supratentorial compartment and spinal cord. Its association with vHL is uncommon and no histological or immunohistochemical correlation was

  14. Novel methods of cytokine detection: Real-time PCR, ELISPOT, and intracellular cytokine staining

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    Eliza Turlej

    2009-05-01

    Full Text Available Cytokines are small hormone-like proteins that play important roles in immune system control. Cytokines regulate the proliferation and differentiation of cells and hematopoiesis and act as mediators in the inflammatory reaction. Changes in cytokine levels are found in many diseases, such as sepsis, bowel inflammatory disease, autoimmune diseases, as well as graft-versus-host disease. Cytokines levels can be detected using in vivo, in vitro, and ex vivo techniques. The level of cytokine produced can be measured by immunoenzymatic test (ELISA in supernatant after cell culture with the addition of stimulant and in plasma by techniques that measure the level of cytokine secretion in cells (e.g. immunohistochemical staining, ELISPOT, and intracellular cytokine staining, and by molecular biological methods (RPA, real-time PCR, in situ hybridization, and Northern blot. Detection of cytokine mRNA in tissues is useful in the direct determination of heterogenic populations of cytokine-producing cells. Nowadays the most frequently used methods for measuring cytokine level are ELISPOT, intracellular cytokine staining with flow cytometry detection, and real-time PCR. These methods have an important clinical role in vaccine efficacy, in viral, bacterial, and verminous diagnostics, and in determining the efficacy of cancer treatment.

  15. Evaluation of immunoperoxidase staining technique in the diagnosis of Acanthamoeba keratitis

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    Sharma Savitri

    2001-01-01

    Full Text Available Purpose: We describe a simple procedure of Immunoperoxidase (IP technique, using indigenously raised antibody, to screen corneal scrapings for Acanthamoeba cysts and trophozoites. This study sought to determine the utility of this test in the diagnosis of Acanthamoeba keratitis. Methods: A high titre polyclonal antibody against a local clinical isolate (axenic of Acanthamoeba species (trophozoite lysate antigen was raised in rabbits and used for standardization of IP technique for corneal scrapings. Twenty two smears of corneal scrapings, collected from patients showing Acanthamoeba cysts in corneal scrapings stained with calcofluorwhite (pool-1 and patients showing no cysts in similar scrapings (pool-2, were coded and stained by IP technique by a masked technician. All 22 patients had also been tested for bacteria, fungus, and Acanthamoeba in their corneal scrapings by smears and cultures. IP stained smears were examined for organisms including cysts and trophozoites of Acanthamoeba and background staining by two observers masked to the results of other smears and cultures. The validity of the IP test in detection of Acanthamoeba cysts and trophozoites was measured by sensitivity, specificity, positive predictive value and negative predictive value in comparison (McNemar test for paired comparison with calcofluor white staining and culture. Results: Based on the readings of observer 1 and compared to calcofluor white staining, the IP test had a sensitivity of 100%, a specificity of 94%, positive predictive value of 80% and negative predictive value of 100%. When compared to culture, the values were 83%, 100%, 100% and 94% respectively. Trophozoites missed in calcofluor white stained smears, were detected in 2 out of 6 cases of culture-positive Acanthamoeba keratitis. The Kappa coefficient of interobserver agreement was determined as fair (30.4%. Conclusion: The immunoperoxidase technique is a simple and useful test in the diagnosis of

  16. Immunohistochemical detection of a very high density lipoprotein (VHDL) in ovarian follicles of Triatoma infestans.

    Science.gov (United States)

    González, M S; Ronderos, J R; Rimoldi, O J; Brenner, R R

    2001-04-01

    The ability of Triatoma infestans ovarian follicles to synthesize a very high-density lipoprotein (VHDL) has been examined by immunohistochemical methods. This kind of lipoprotein can be envisaged as a storage hexameric protein present in the hemolymph of some insect species. VHDL immunoreactivity is observed in oocytes at different stages of maturation. The antigen is present in the oocyte cytoplasm as well as in the follicular epithelial cells. The immunopositive reaction in the apical surface of follicle cells suggests both a VHDL synthesis and a secretion process. Furthermore, VHDL seems to be stored into oocyte in yolk granules. On the contrary, no immunopositive reaction is observed in the intracellular spaces between follicle cells, suggesting that VHDL is not incorporated from hemolymph into the oocyte.

  17. Expression of immunohistochemical markers for testicular carcinoma in situ by normal human fetal germ cells

    DEFF Research Database (Denmark)

    Jørgensen, N; Rajpert-De Meyts, E; Graem, N

    1995-01-01

    study. EXPERIMENTAL DESIGN: Normal human germ cells from 10 first-trimester fetuses and 76 second- and third-trimester testes were investigated for the immunohistochemical expression of the markers of testicular carcinoma in situ. The panel of markers included in the study consisted of placental......-like alkaline phosphatase, the protooncogene c-kit protein product, and the antigens for the monoclonal antibodies TRA-1-60 and M2A. The relative numbers of fetal germ cells that demonstrated positive reaction with the markers were calculated. RESULTS: The vast majority of the germ cells (75-100%) in the first......-trimester gonads were positive for placental-like alkaline phosphatase, TRA-1-60, and M2A. The c-kit protein was detected in three out of the ten first-trimester gonads. The relative number of germ cells positive for all the markers studied declined rapidly during the first part of the second trimester...

  18. Comparison of direct immunofluorescence and direct immunoperoxidase procedures for detection of herpes simplex virus antigen in lesion specimens.

    OpenAIRE

    Schmidt, N J; Dennis, J; Devlin, V; Gallo, D; Mills, J

    1983-01-01

    Direct immunofluorescence and direct immunoperoxidase staining were equally sensitive and specific for detection of herpes simplex virus antigen in lesion specimens, and each method showed 82% agreement with virus isolation results.

  19. Immunohistochemical analysis of mechanoreceptors in the human posterior cruciate ligament: a demonstration of its proprioceptive role and clinical relevance.

    Science.gov (United States)

    Del Valle, M E; Harwin, S F; Maestro, A; Murcia, A; Vega, J A

    1998-12-01

    Although long-term studies report successful results with total knee arthroplasty (TKA), performed with or without posterior cruciate ligament (PCL) retention, controversy exists as to which is preferable in regard to patient outcome and satisfaction. The possible proprioceptive role of the PCL may account for a more normal feeling of the arthroplasty. Although the PCL has been examined using various histological techniques, immunohistochemical techniques are the most sensitive for neural elements. Therefore an immunohistochemical study was designed to determine the patterns of innervation, the morphological types of the proprioceptors, and their immunohistochemical profile. During TKA, samples were obtained from 22 osteoarthritic PCLs and subjected to immunohistochemical analysis with mouse monoclonal antibodies against neurofilament protein (NFP), S100 protein (S100P), epithelial membrane antigen (EMA), and vimentin (all present in neuromechanoreceptors). Three normal PCLs from cadaveric specimens were also obtained and analyzed for comparison. Five types of sensory corpuscles were observed in both the normal and the arthritic PCLs: simple lamellar, Pacini-like, Ruffini, Krause-like, and morphologically unclassified. Their structure included a central axon, inner core, and capsule in lamellar and Pacini corpuscles and variable intracorpuscular axons and periaxonal cells in the Ruffini and Krause-like corpuscles. The immunohistochemical profile showed the central axon to have NFP immunoreactivity, periaxonal cells to have S100P and vimentin immunoreactivity, and the capsule to have EMA and vimentin immunoreactivity. Nerve fibers and free nerve endings displayed NFP and S100P immunoreactivity. The immunohistochemical profile of the PCL sensory corpuscles is almost identical to that of cutaneous sensory corpuscles. Some prior histological studies of the PCL reported Golgi-like mechanoreceptors, and others found encapsulated corpuscles but no Golgi-like structures

  20. AntigenMap 3D: an online antigenic cartography resource.

    Science.gov (United States)

    Barnett, J Lamar; Yang, Jialiang; Cai, Zhipeng; Zhang, Tong; Wan, Xiu-Feng

    2012-05-01

    Antigenic cartography is a useful technique to visualize and minimize errors in immunological data by projecting antigens to 2D or 3D cartography. However, a 2D cartography may not be sufficient to capture the antigenic relationship from high-dimensional immunological data. AntigenMap 3D presents an online, interactive, and robust 3D antigenic cartography construction and visualization resource. AntigenMap 3D can be applied to identify antigenic variants and vaccine strain candidates for pathogens with rapid antigenic variations, such as influenza A virus. http://sysbio.cvm.msstate.edu/AntigenMap3D

  1. Antigens of Streptococcus sanguis

    Science.gov (United States)

    Rosan, Burton

    1973-01-01

    An antigenic analysis of the alpha-hemolytic streptococci isolated from dental plaque was performed by use of antisera against a strain of Streptococcus sanguis (M-5) which was isolated from dental plaque. Immunoelectrophoretic and Ouchterlony tests of Rantz and Randall extracts of 45 strains gave positive reactions with the M-5 antisera. These strains represented 60% of the strains tested. The number of antigens which could be identified in these extracts varied from one to five and were designated a to e. The a antigen was found in 36 of the strains tested, including reference strains of S. sanguis and the group H streptococci. The strains reacting with the M-5 antisera were divided into two majors types: type I consisted of 23 strains in which the a antigen was found alone or with one or more of the c, d, and e antigens; type II consisted of 13 strains in which both the a and b antigens were found with or without one or more of the c, d, and e antigens. The remaining strains contained, either singly or in combination, the b, c, d, and e antigens but not the a antigen. Biochemical tests of representatives of each serotype and reference strains indicated that strains reacting with M-5 antisera were S. sanguis. These findings suggest that S. sanguis strains share common physiological and serological properties. Images PMID:4633291

  2. 21 CFR 864.1850 - Dye and chemical solution stains.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Dye and chemical solution stains. 864.1850 Section... (CONTINUED) MEDICAL DEVICES HEMATOLOGY AND PATHOLOGY DEVICES Biological Stains § 864.1850 Dye and chemical solution stains. (a) Identification. Dye and chemical solution stains for medical purposes are mixtures of...

  3. Intranasal location and immunohistochemical characterization of the equine olfactory epithelium

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    Alexandra Kupke

    2016-10-01

    Full Text Available The olfactory epithelium (OE is the only body site where neurons contact directly the environment and are therefore exposed to a broad variation of substances and insults. It can serve as portal of entry for neurotropic viruses which spread via the olfactory pathway to the central nervous system (CNS. For horses, it has been proposed and concluded mainly from rodent studies that different viruses, e.g. Borna disease virus (BoDV, equine herpesvirus 1 (EHV-1, hendra virus, influenza virus, rabies virus, vesicular stomatitis virus (VSV can use this route. However, little is yet known about cytoarchitecture, protein expression and the intranasal location of the equine OE. Revealing differences in cytoarchitecture or protein expression pattern in comparison to rodents, canines or humans might help to explain varying susceptibility to certain intranasal virus infections. On the other hand, disclosing similarities especially between rodents and other species, e.g. horses would help to underscore transferability of rodent models. Analysis of the complete noses of 5 adult horses revealed that in the equine OE two epithelial subtypes with distinct marker expression exist, designated as types a and b which resemble those previously described in dogs. Detailed statistical analysis was carried out to confirm the results obtained on the descriptive level. The equine OE was predominantly located in caudodorsal areas of the nasal turbinates with a significant decline in rostroventral direction, especially for type a. Immunohistochemically, olfactory marker protein (OMP and doublecortin (DCX expression was found in more cells of OE type a, whereas expression of proliferating cell nuclear antigen (PCNA and tropomyosin receptor kinase A (TrkA was present in more cells of type b. Accordingly, type a resembles the mature epithelium, in contrast to the more juvenile type b. Protein expression profile was comparable to canine and rodent OE but equine type a and b were

  4. DNAJB9 Is a Specific Immunohistochemical Marker for Fibrillary Glomerulonephritis

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    Samih H. Nasr

    2018-01-01

    Conclusion: DNAJB9 immunohistochemistry is sensitive and specific for FGN. Incorporation of this novel immunohistochemical biomarker into clinical practice will now allow more rapid and accurate diagnosis of this disease.

  5. Laser Treatment of Port Wine Stains

    Science.gov (United States)

    Majaron, Boris; Nelson, J. Stuart

    Port wine stain (PWS), also called nevus flammeus, is a congenital, cutaneous vascular malformation involving post-capillary venules which produce a light pink to red to dark-red-violet discoloration of human skin [1]. PWS occurs in an estimated 3 children per 1000 live births, affecting males and females and all racial groups equally [2]. There appears to be no hereditary predilection for PWS within families. There are no known risk factors or ways to prevent PWS.

  6. An Immunohistochemical Algorithm for Ovarian Carcinoma Typing.

    Science.gov (United States)

    Köbel, Martin; Rahimi, Kurosh; Rambau, Peter F; Naugler, Christopher; Le Page, Cécile; Meunier, Liliane; de Ladurantaye, Manon; Lee, Sandra; Leung, Samuel; Goode, Ellen L; Ramus, Susan J; Carlson, Joseph W; Li, Xiaodong; Ewanowich, Carol A; Kelemen, Linda E; Vanderhyden, Barbara; Provencher, Diane; Huntsman, David; Lee, Cheng-Han; Gilks, C Blake; Mes Masson, Anne-Marie

    2016-09-01

    There are 5 major histotypes of ovarian carcinomas. Diagnostic typing criteria have evolved over time, and past cohorts may be misclassified by current standards. Our objective was to reclassify the recently assembled Canadian Ovarian Experimental Unified Resource and the Alberta Ovarian Tumor Type cohorts using immunohistochemical (IHC) biomarkers and to develop an IHC algorithm for ovarian carcinoma histotyping. A total of 1626 ovarian carcinoma samples from the Canadian Ovarian Experimental Unified Resource and the Alberta Ovarian Tumor Type were subjected to a reclassification by comparing the original with the predicted histotype. Histotype prediction was derived from a nominal logistic regression modeling using a previously reclassified cohort (N=784) with the binary input of 8 IHC markers. Cases with discordant original or predicted histotypes were subjected to arbitration. After reclassification, 1762 cases from all cohorts were subjected to prediction models (χ Automatic Interaction Detection, recursive partitioning, and nominal logistic regression) with a variable IHC marker input. The histologic type was confirmed in 1521/1626 (93.5%) cases of the Canadian Ovarian Experimental Unified Resource and the Alberta Ovarian Tumor Type cohorts. The highest misclassification occurred in the endometrioid type, where most of the changes involved reclassification from endometrioid to high-grade serous carcinoma, which was additionally supported by mutational data and outcome. Using the reclassified histotype as the endpoint, a 4-marker prediction model correctly classified 88%, a 6-marker 91%, and an 8-marker 93% of the 1762 cases. This study provides statistically validated, inexpensive IHC algorithms, which have versatile applications in research, clinical practice, and clinical trials.

  7. Elastofibroma dorsi: a histochemical and immunohistochemical study

    Directory of Open Access Journals (Sweden)

    A. Di Vito

    2015-02-01

    Full Text Available Elastofibroma dorsi (ED is considered a member of a heterogeneous group of benign fibrous (fibroblastic or myofibroblastic soft-tissue tumors, frequently localized in the periscapular region in middle aged or older individuals. However, the pathogenesis of ED is still unclear and many authors believe that ED results from a reactive hyperproliferation of fibroblastic tissue, while others suggest that it may be a consequence of a mechanical friction. In our study, we examined 11 cases of ED using histochemical and immunohistochemical methods, in order to extend the knowledge about extracellular matrix composition and histopathogenesis of ED. From the results it appeared that stroma and interspersed spindle cells of ED were positive for both periostin and tenascin-C. Mast cells tryptase-positive were also abundant throughout the lesion. The perivascular distribution of periostin and tenascin-C, associated with the CD34 positivity, suggest that endothelial-mesenchymal transition events can account for neovascularization and production of fibroelastic tissue characteristic of elastofibroma. Our data obtained in endothelial cells cultures demonstrated that elastin production is higher when the status of confluence of the cells is low. So, we can assume that such a phenomenon is a characteristic of mesenchymal/endothelial cells CD34 positive, in which elastin production results to be inversely proportional to the vascular differentiation of cellular elements. In the light of these considerations, we think that a cancerous nature of ED is unlikely. Overall, our study report, for the first time, a detailed description of extracellular matrix composition in ED, suggesting that a mechanical strain-dependent reactivation of periostin and tenascin-C expression, as well as of elastin deposition, could be responsible for development of ED.

  8. Diagnosis of Blastocystis hominis by different staining techniques.

    Science.gov (United States)

    Khalifa, A M

    1999-01-01

    One hundred and fifty stool samples were collected from diarrheic patients of different ages, and examined for Blastocystis hominis by direct smears and concentrated by Sheather's sugar flotation. Staining was done by: Giemsa, two modifications of trichrome stain, modified Ziehl-Neelsen, safranin-methylene blue and two-auramine stains. Out of the 150 cases nine were positive for blastocystosis. The best stains were safranin-methylene blue and modified Ziehl-Neelsen stains. They had the advantage of staining cysts and amoeboid forms besides being rapid and easy to perform. The modified trichrome stains identified 8 ie, less specific and were time consuming. The auramine dyes stained the cyst, both the wall and internal body fluoresced brightly. Giemsa stain was not an efficient stain. Scanning and transmission electron microscopy (SEM, TEM) were performed to study the fine ultrastructure.

  9. Validation of Immunomonitoring Methods for Application in Clinical Studies: The HLA-Peptide Multimer Staining Assay.

    Science.gov (United States)

    Chandran, P Anoop; Laske, Karoline; Cazaly, Angelica; Rusch, Elisa; Schmid-Horch, Barbara; Rammensee, Hans-Georg; Ottensmeier, Christian H; Gouttefangeas, Cécile

    2018-03-01

    Validated assays are essential to generate data with defined specificity, consistency, and reliability. Although the process of validation is required for applying immunoassays in the context of clinical studies, reports on systematic validation of in vitro T cell assays are scarce so far. We recently validated our HLA-peptide multimer staining assay in a systematic manner so as to qualify the method for monitoring antigen-specific T cell responses after immunotherapy. Parameters of the assay, specificity, precision, linearity, sensitivity, and robustness were assessed systematically. Experiments were designed to address specifically each parameter and are detailed. Nonspecific multimer staining was below the acceptance limit of 0.02% multimer (+) CD8 (+) cells. The assay showed acceptable precision in all dimensions it was repeated (CV  0.99) of antigen specific cells. We succeeded in validating the HLA-multimer staining assay in a systematic manner. Additionally, we propose a technical framework and recommendations that can be applied for validating other T cell assessment methods. © 2016 International Clinical Cytometry Society. © 2016 International Clinical Cytometry Society.

  10. Immunohistochemical study of pancreatic neuroendocrine tumor in Panthera tigris tigris.

    Science.gov (United States)

    Nyska, A; Goldstein, J; Eshkar, G; Klein, B

    1996-07-01

    The histological and immunohistochemical characteristics of a case of pancreatic neuroendocrine tumor are described in a 14-yr-old female Bengal tiger (Panthera tigris tigris) housed at the New Biblical Zoo of Jerusalem, Jerusalem, Israel, 1994. The neoplastic cells were immunohistochemically negative for insulin and glucagon, slightly positive for neuron-specific enolase, moderately positive for serotonin and somatostatin, and markedly positive for chromogranine A and gastrin. This is the first documentation of a pancreatic neuroendocrine tumor in the tiger.

  11. Microspectrophotometric studies of Romanowsky stained blood cells. II. Comparison of the performance of two standardized stains.

    Science.gov (United States)

    Marshall, P N; Galbraith, W; Navarro, E F; Bacus, J W

    1981-11-01

    This paper describes a comparison of the performance of two standardized Romanowsky blood stains, namely those of Marshall et al. and Wittekind et al., both containing azure B and eosin alone. Stain performance is assessed objectively by the use of three complementary techniques, all based on the visible absorbance spectra of stained cellular substrates. The first of these techniques is a simple comparison of the shapes and heights of the absorbance spectra. The second technique uses the CIE Colorimetric System, and thus permits the quantitation of colour in a manner that agrees with human observation. CIE co-ordinates (chromaticity points, luminance) are calculated directly from absorbance spectra. The third technique is that of spectral subtraction, which yields a set of factors which describe the quantities of component dyes which are bound by the object. This technique, unlike the other two, requires a priori knowledge of the dyes used in the stains, and their spectra when bound to cellular substrates. Although the differences between the two methods are subtle, and hard for the subjective observer to define, the objective methods described here do show statistically significant differences. Wittekind's stain produces less intense staining, except for lymphocyte and monocyte cytoplasms. To the human eye, the differential coloration of these two substrates is more pronounced, but the difference between all nuclei and cytoplasm is less marked. The major difference in the uptake of dye components is in the small quantities of eosin dimer that are bound in this technique.

  12. Elevated expression of squamous cell carcinoma antigen (SCCA is associated with human breast carcinoma.

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    Joseph M Catanzaro

    2011-04-01

    Full Text Available Squamous cell carcinoma antigen (SCCA belongs to the serine protease inhibitor (Serpin family of proteins. Elevated expression of SCCA has been used as a biomarker for aggressive squamous cell carcinoma (SCC in cancers of the cervix, lung, head and neck, and liver. However, SCCA expression in breast cancer has not been investigated. Immunohistochemical analysis of SCCA expression was performed on tissue microarrays containing breast tumor tissues (n = 1,360 and normal breast epithelium (n = 124. SCCA expression was scored on a tiered scale (0-3 independently by two evaluators blind to the patient's clinical status. SCCA expression was observed in Grade I (0.3%, Grade II (2.5%, and Grade III (9.4% breast cancers (p<0.0001. Comparing tissues categorized into the three non-metastatic TNM stages, I-III, SCCA positivity was seen in 2.4% of Stage I cancers, 3.1% of Stage II cancers, and 8.6% of Stage III breast cancers (p = 0.0005. No positive staining was observed in normal/non-neoplastic breast tissue (0 out of 124. SCCA expression also correlated to estrogen receptor/progesterone receptor (ER/PR double-negative tumors (p = 0.0009. Compared to SCCA-negative patients, SCCA-positive patients had both a worse overall survival and recurrence-free survival (p<0.0001 and p<0.0001, respectively. This study shows that SCCA is associated with both advanced stage and high grade human breast carcinoma, and suggests the necessity to further explore the role of SCCA in breast cancer development and treatment.

  13. Comparison of methylene blue/gentian violet stain to Gram's stain for the rapid diagnosis of gonococcal urethritis in men.

    Science.gov (United States)

    Taylor, Stephanie N; DiCarlo, Richard P; Martin, David H

    2011-11-01

    We compared a simple, one-step staining procedure using a mixture of methylene blue and gentian violet to Gram stain for the detection of gonococcal urethritis. The sensitivity and specificity of both Gram stain and methylene blue/gentian violet stain were 97.3% and 99.6%, respectively. There was a 100% correlation between the 2 methods.

  14. Histochemical and immunohistochemical analyses of the myocardial scar fallowing acute myocardial infarction

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    Tatić Vujadin

    2012-01-01

    Full Text Available Background/Aim. The heart has traditionally been considered as a static organ without capacity of regeneration after trauma. Currently, the more and more often asked question is whether the heart has any intrinsic capacities to regenerate myocytes after myocardial infarction. The aim of this study was to present the existence of the preserved muscle fibers in the myocardial scar following myocardial infarction as well as the presence of numerous cells of various size and form that differently reacted to the used immunohistochemical antibodies. Methods. Histological, histochemical and immunohistochemical analyses of myocardial sections taken from 177 patients who had died of acute myocardial infarction and had the myocardial scar following myocardial infarction, were carried out. More sections taken both from the site of acute infarction and scar were examined by the following methods: hematoxylin-eosin (HE, periodic acid schiff (PAS, PAS-diastasis, Masson trichrom, Malory, van Gieson, vimentin, desmin, myosin, myoglobin, alpha actin, smoth muscle actin (SMA, p53, leukocyte common antigen (LCA, proliferating cell nuclear antigen (PCNA, Ki-67, actin HHF35, CD34, CD31, CD45, CD45Ro, CD8, CD20. Results. In all sections taken from the scar region, larger or smaller islets of the preserved muscle fibers with the signs of hypertrophy were found. In the scar, a large number of cells of various size and form: spindle, oval, elongated with abundant cytoplasm, small with one nucleus and cells with scanty cytoplasm, were found. The present cells differently reacted to histochemical and immunohistochemical methods. Large oval cells showed negative reaction to lymphocytic and leukocytic markers, and positive to alpha actin, actin HHF35, Ki-67, myosin, myoglobin and desmin. Elongated cells were also positive to those markers. Small mononuclear cells showed positive reaction to lymphocytic markers. Endothelial and smooth muscle cells in the blood vessel walls

  15. Eosinofil Sel Penyaji Antigen

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    Safari Wahyu Jatmiko

    2015-04-01

    Full Text Available Sel eosinofil merupakan jenis sel lekosit yang terlibat dalam berbagai patogenesis penyakit. Sel eosinofil pada awalnya dikenal sebagai sel efektor  dari sistem imunitas alamiah. Akan tetapi, kemampuan sel eosinofil dalam memfagositosis patogen menimbulkan dugaan bahwa sel eosinofil ikut berperan sebagai sel penyaji antigen. Hal ini dianalogikan dengan sel makrofag dan sel dendritik yang bisa memfagositosis dan menyajikan antigen sebagai hasil dari degradasi patogen yang difagositosis. Untuk menjawab permasalahan ini, penulis melakukan penelusuran artikel tentang eosinofil sebagai sel penyaji antigen melalui US National Library of Medicine National Institute of Healthdengan kata kunci eoshinophil dan antigen presenting cell. Hasil penelusuran adalah ditemukannya 10 artikel yang relevan dengan topik. Hasil dari sintesis kesepuluh jurnal tersebut adalah sel eosinofil mampu berperan sebagai sel penyaji antigen yang profesional (professionalantigenpresentng cell

  16. An immunohistochemical approach to differentiate hepatic lipidosis from hepatic phospholipidosis in rats.

    Science.gov (United States)

    Obert, Leslie A; Sobocinski, Gregg P; Bobrowski, Walter F; Metz, Alan L; Rolsma, Mark D; Altrogge, Douglas M; Dunstan, Robert W

    2007-08-01

    Hepatocellular vacuolation can be a diagnostic challenge since cytoplasmic accumulations of various substances (lipid, water, phospholipids, glycogen, and plasma) can have a similar morphology. Cytoplasmic accumulation of phospholipids following administration of cationic amphiphilic drugs (CAD) can be particularly difficult to differentiate from nonphosphorylated lipid accumulations at the light microscopic level. Histochemical methods (Sudan Black, Oil Red-O, Nile Blue, etc.) can be used to identify both nonphosphorylated and/or phosphorylated lipid accumulations, but these techniques require non-paraffin-embedded tissue and are only moderately sensitive. Thus, electron microscopy is often utilized to achieve a definitive diagnosis based upon the characteristic morphologic features of phospholipid accumulations; however, this is a low throughput and labor intense procedure. In this report, we describe the use of immunohistochemical staining for LAMP-2 (a lysosome-associated protein) and adipophilin (a protein that forms the membrane around non-lysosomal lipid droplets) to differentiate phospholipidosis and lipidosis, respectively in the livers of rats. This staining procedure can be performed on formalin-fixed paraffin embedded tissues, is more sensitive than histochemistry, and easier to perform than ultrastructural evaluation.

  17. Solid-pseudopapillary neoplasm of the pancreas: Clinicopathologic and immunohistochemical analysis of nine cases

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    Banu Yilmaz Ozguven

    2015-01-01

    Full Text Available Background: Solid-pseudopapillary neoplasm (SPPN of the pancreas is a distinctive tumor of low malignant potential with a predilection for female patients in the second and third decades of life. We studied nine cases of SPPN of the pancreas and reviewed the literature concerning these uncommon tumors. Materials and Methods: A total of 7 cases of SPPN located in the tail of the pancreas and two located in the head of the pancreas were presented. Distal pancreatectomy in three patients and distal pancreatectomy with splenectomy in two patients Whipple′s operation in four patients were performed. Histological diagnosis was made by performing hematoxylin-eosin and periodic acid-Schiff staining, immunohistochemical staining. Follow-up of the patients was between 2 months and 12 years. Results: Computed tomography and magnetic resonance imaging were found as equivocal for diagnosis. Mass containing cystic and solid areas were not characteristic but raised suspicion of SPPN. Pathologic examination showed SPPN in all patients. No metastasis or recurrence was detected during follow-up. Conclusions: Solid-pseudopapillary neoplasm is a relatively rare tumor, and patients tend to survive for a long period. Preoperative imaging is not characteristic. Pathologic examination is the mainstay in the diagnosis. Complete surgical removal is the best choice of treatment.

  18. Immunohistochemical Expression of Placental Alkaline Phosphatase in Five Cases of Seminoma in Rabbits.

    Science.gov (United States)

    Banco, B; Ferreira da Silva, J; Cotti Cometti, S; Stefanello, D; Grieco, V

    2017-05-01

    Testicular seminoma is reported in the rabbit but data about the immunophenotype of these tumours are lacking. The classification of human testicular germ cell tumours includes spermatocytic tumour (ST) originating from the post-pubertal spermatogonia/spermatocytes, which metastasizes rarely, and seminoma (SE), originating from gonocytes, which is malignant and metastasizes frequently. Gonocytes express placental alkaline phosphatase (PLAP) and are stained with periodic acid-Schiff (PAS). We report five cases of seminoma in pet rabbits. Microscopically, all the cases were diffuse seminoma and in one case there was metastasis to a sublumbar lymph node. Immunohistochemical expression of PLAP was diffuse in this metastatic tumour, in two other cases it was multifocal, in another it was limited to rare cells and in the remaining case was negative. PAS-positive cells were detected only in the four cases that expressed PLAP. These four cases were therefore classified as SE and the tumour without PLAP labelling or PAS staining was defined as ST. Both forms of human germ cell tumour therefore occur in the rabbit. SE appears to be well represented and may show metastasis, paralleling the human counterpart. The results of this study provide a basis for further evaluations of the rabbit as a possible animal model for the study of human SE. Copyright © 2017 Elsevier Ltd. All rights reserved.

  19. Sarcoglycan complex in masseter and sternocleidomastoid muscles of baboons: an immunohistochemical study

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    G. Cutroneo

    2015-06-01

    Full Text Available The sarcoglycan complex consists of a group of single-pass transmembrane glycoproteins that are essential to maintain the integrity of muscle membranes. Any mutation in each sarcoglycan gene causes a series of recessive autosomal dystrophin-positive muscular dystrophies. Negative fibres for sarcoglycans have never been found in healthy humans and animals. In this study, we have investigated whether the social ranking has an influence on the expression of sarcoglycans in the skeletal muscles of healthy baboons. Biopsies of masseter and sternocleidomastoid muscles were processed for confocal immunohistochemical detection of sarcoglycans. Our findings showed that baboons from different social rankings exhibited different sarcoglycan expression profiles. While in dominant baboons almost all muscles were stained for sarcoglycans, only 55% of muscle fibres showed a significant staining. This different expression pattern is likely to be due to the living conditions of these primates. Sarcoglycans which play a key role in muscle activity by controlling contractile forces may influence the phenotype of muscle fibres, thus determining an adaptation to functional conditions. We hypothesize that this intraspecies variation reflects an epigenetic modification of the muscular protein network that allows baboons to adapt progressively to a different social status.

  20. [Detection and documentation of masked blood stains with infrared technique].

    Science.gov (United States)

    Du Chesne, A; Bajanowski, T; Brinkmann, B

    1993-01-01

    On dark textiles the visualization of blood stains with the naked eye is either difficult or impossible. In experimental stains and in case work stains we have applied an infrared (IR) video camera in combination with a video printer. As an alternative, an IR goggle was used which could also be connected with a video printer. The results obtained on a variety of different stains and stain carriers are encouraging. Stains showing poor contrast usually become more contrasted. Stains which are partly masked can become complete. Masked stains can become visible. The system is not effective in all combinations of stains and carriers. But it solves a great proportion of formerly problematic cases. Documentation of results is quite easy if a videoprinter is used.

  1. Immunohistochemical expression of Bcl-2 and Ki-67 in oral lichen planus and leukoplakia with different degrees of dysplasia.

    Science.gov (United States)

    Pigatti, Fernanda Mombrini; Taveira, Luís Antônio de Assis; Soares, Cléverson Teixeira

    2015-02-01

    Oral lichen planus (OLP) is a chronic inflammatory disease of unknown cause. Malignant transformation in OLP lesions may be favored by changes in the expression of proteins that regulate cell proliferation and apoptosis. This study aimed to investigate these issues by immunohistochemical staining for Bcl-2 and Ki-67 and by correlating histopathological findings in samples from lesions of OLP and leukoplakia with epithelial dysplasia. Data for patients with OLP or leukoplakia with moderate or severe epithelial dysplasia recorded during 2006-2011 were retrospectively reviewed. The study samples represented 37 subjects with OLP (n = 14), leukoplakia with moderate (n = 8) or severe (n = 6) epithelial dysplasia, and normal buccal mucosa (controls, n = 9). New sections were subjected to histological examination and immunohistochemistry for Bcl-2 and Ki-67 in the basal layer, suprabasal layer, and inflammatory infiltrate, respectively. All basal layer sections stained either negative or positive in leukoplakia, 85.7% of sections indicated positivity in leukoplakia (64.3%) sections stained positive for Ki-67 in >50% of cells. All suprabasal sections stained either negative or positive in leukoplakia (42.9% and 57.1%, respectively), and control (88.9% and 11.1%, respectively) samples. Suprabasal staining for Ki-67 was negative or positive in leukoplakia (7.1% and 92.9%, respectively), and controls (88.9% and 11.1%, respectively). Staining for Bcl-2 in inflammatory infiltrate in OLP was positive in 92.9% of sections. Expression of Bcl-2 may play a dual role in tumor development and progression. Increased cell proliferation in the epithelium may present a predisposition to cancer in OLP. The expression of Ki-67 can be considered as an adjunct marker for proliferative activity in lesions with malignant potential. The prognostic value of these immunomarkers in the evaluation of precancerous oral lesions requires further investigation. © 2014 The International Society

  2. Fetal Outcome in Meconium Stained Deliveries

    Science.gov (United States)

    Mundhra, Rajlaxmi; Agarwal, Manika

    2013-01-01

    Objective: To evaluate the foetal outcome in Meconium Stained Amniotic Fluid (MSAF). Material and Methods: This prospective observational study was carried out in the Department of Obstetrics and Gynaecology, North Eastern Indira Gandhi Regional Institute of Health And Medical Sciences, Shillong, India, over a period of eighteen months, from January 2010 to June 2011. A total of 355 pregnant women who had completed more than 37 weeks of gestation, with singleton pregnancies and cephalic presentations were included in this study. One hundred and sixty five cases with MSAF, were thus selected and they were compared with 190 randomly selected controls. Results: Among 165 cases, 27.88 % of the cases had regular visits to the Institute at least 3 times previously, 72.12% cases had no previous visit at all. Primigravidas accounted for a majority of cases and approximately 50% cases had gestational ages of more than 40 weeks Pregnancies complicated with pregnancy induced hypertension had statistically significant higher rates of meconium staining among cases (16.97%), as compared to those among controls (7.89%). 21.81% cases had foetal heart rate abnormalities, as were detected by electronic foetal monitoring and presence of foetal bradycardia was statistically higher in cases compared to that in controls. Casearean section rates were nearly double in cases (49.09%). Neonatal outcome was poor in terms of low Apgar score at birth, birth asphyxia, Meconium Aspiration Syndrome (MAS) and increased neonatal admission among cases as compared to that among controls. Conclusion: Meconium stained amniotic fluid is really worrisome from both, obstetrician’s and paediatrician’s points of view, as it increases the caesarean rates, causes birth asphyxia, MAS and increases neonatal intensive care unit admissions. PMID:24551662

  3. Robust fadeout profile of an evaporation stain

    Science.gov (United States)

    Witten, T. A.

    2009-06-01

    We propose an explanation for the commonly seen fading in the density of a stain remaining after a droplet has dried on a surface. The density decreases as a power p of the distance from the edge. For thin, dilute drops of general shape this power is determined by a flow stagnation point in the distant interior of the drop. The power p depends on the local evaporation rate J(0) at the stagnation point and the liquid depth h(0) there: p = 1 - 2~ (h(0)/\\bar h)(\\bar J/J(0)) , where \\bar h and \\bar J are averages over the drop surface.

  4. Romanowsky staining in cytopathology: history, advantages and limitations.

    Science.gov (United States)

    Krafts, K P; Pambuccian, S E

    2011-04-01

    If the entire discipline of diagnostic cytopathology could be distilled into a single theme, it would be the Papanicolaou stain. Yet it was the Romanowsky stain upon which the discipline of cytopathology was founded. Both stains are used today in the cytopathology laboratory, each for a different and complementary purpose. We trace the history of cytopathological stains and discuss the advantages and limitations of Romanowsky-type stains for cytological evaluation. We also provide suggestions for the advantageous use of Romanowsky-type stains in cytopathology.

  5. Vascular expression of endothelial antigen PAL-E indicates absence of blood-ocular barriers in the normal eye

    NARCIS (Netherlands)

    Schlingemann, R. O.; Hofman, P.; Anderson, L.; Troost, D.; van der Gaag, R.

    1997-01-01

    The endothelium-specific antigen PAL-E is expressed in capillaries and veins throughout the body with the exception of the brain, where the antigen is absent from anatomical sites with a patent blood-brain barrier. In this study we determined vascular endothelial staining for PAL-E in the normal eye

  6. Cancer-testis antigen expression in synovial sarcoma: NY-ESO-1, PRAME, MAGEA4, and MAGEA1.

    Science.gov (United States)

    Iura, Kunio; Maekawa, Akira; Kohashi, Kenichi; Ishii, Takeaki; Bekki, Hirofumi; Otsuka, Hiroshi; Yamada, Yuichi; Yamamoto, Hidetaka; Harimaya, Katsumi; Iwamoto, Yukihide; Oda, Yoshinao

    2017-03-01

    Synovial sarcoma (SS) is regarded as a relatively chemosensitive sarcoma, but the prognosis of advanced SSs remains poor. Here we identified highly expressed cancer-testis antigens that could be promising immunotherapy targets for SS, using a previously conducted cDNA microarray, and we assessed the clinicopathological or prognostic relationships of these antigens in SS. We compared the gene expression profiles of 11 SSs with those of 3 normal adipose tissues. Among the up-regulated cancer-testis antigens, we analyzed PRAME, MAGEA1, and MAGEA4 and another cancer-testis antigen (NY-ESO-1) together, by immunohistochemistry and real-time polymerase chain reaction in 108 SSs. Immunohistochemically, NY-ESO-1, PRAME, MAGEA4, and MAGEA1 were positive in 66 (61%), 93 (86%), 89 (82%), and 16 (15%) of 108 SSs, respectively, and 104 (96%) of 108 SSs showed the immunohistochemical expression of at least 1 of NY-ESO-1, PRAME, and MAGEA4. Moreover, the high expression of at least 1 of these 3 antigens was observed in 83% of the SSs. High expression of NY-ESO-1 and MAGEA4 was significantly correlated with the presence of necrosis and advanced clinical stage. The immunohistochemical expression of these cancer-testis antigens was not correlated with prognosis, but the coexpression of NY-ESO-1, PRAME, and MAGEA4 was significantly associated with adverse prognosis. The real-time polymerase chain reaction results were closely related to the immunohistochemical results: NY-ESO-1 (P = .0019), PRAME (P = .039), MAGEA4 (P = .0149), and MAGEA1 (P = .0766). These data support the potential utility of NY-ESO-1, PRAME, and MAGEA4 as immunotherapy targets and ancillary prognostic parameters, suggesting the possible benefit of the combined use of these cancer-testis antigens as an SS immunotherapy target. Copyright © 2016 Elsevier Inc. All rights reserved.

  7. Transition of Immunohistochemical Expression of E-Cadherin and Vimentin from Premalignant to Malignant Lesions of Oral Cavity and Oropharynx

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    Kafil Akhtar

    2016-05-01

    Full Text Available Objectives: We sought to study the expression of epithelial-to-mesenchymal transition markers E-cadherin and vimentin in precancerous lesions of the oral cavity and oropharynx and to use the specific pattern of expression to predict invasiveness. Methods: This cross-sectional study looked at 87 cases of oral and oropharyngeal lesions obtained between December 2012 and November 2014 in the Department of Pathology, Jawaharlal Nehru Medical College, Aligarh Muslim University, India. Fifty-three biopsies from the buccal mucosa, tongue, and pharynx and 34 resected oral specimens were evaluated for premalignant and malignant lesions using hematoxylin and eosin and immunohistochemical stains. Immunohistochemical expression of epithelial marker E-cadherin and mesenchymal marker vimentin was evaluated wherever possible. Slides were examined for staining pattern (cytoplasmic or membrane, proportion, and intensity of staining of tumor cells. Patients follow-up and therapy related changes were also studied. Results: There were 64 premalignant and 23 malignant cases in our study with 65 (74.7% cases seen in males and 22 (25.3% cases seen in females. The majority of malignant cases, (n = 15; 64.2% were seen in the fifth and sixth decades of life while most of the premalignant lesions (n = 36; 56.4% were seen in the fourth and fifth decade. Amongst the 64 premalignant oral lesions, leukoplakia comprised of 14 cases (21.9%, of which three cases had associated mild to moderate dysplasia. The majority of premalignant lesions showed strong E-cadherin expression and decreased expression of vimentin with negative and weak expression in both dysplasias and carcinoma in situ (p = 0.013. E-cadherin expression was significantly reduced in invasive carcinomas compared to dysplasias and carcinoma in situ and the difference in immunoreactivity was statistically significant (p < 0.050. Vimentin expression increased as the tumor progressed from dysplasias to carcinoma in

  8. Pathologic and Immunohistochemical Findings of Natural Lumpy Skin Disease in Egyptian Cattle

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    MS El-Neweshy*, TM El-Shemey1 and SA Youssef

    2013-01-01

    Full Text Available This study was designed to investigate clinical and pathologic characteristics of acute and subacute lumpy skin disease (LSD among naturally infected cattle and to study the localization of LSDV capsid antigen within different cells of the skin and regional lymph nodes using immunohistochemistry. Herein, we describe the gross, histologic, and immunohistochemical findings in 13 dairy cattle, 11 beef calves and 2 newly born calves that were naturally infected with LSDV. Prominent gross changes in all cases included numerous 1-6 cm well circumscribed, round cutaneous nodules with severe enlargement of superficial lymph nodes. Histologic changes in all acute cases consisted of severe ballooning degeneration of the epidermis, lymphoplasmacytic dermatitis, folliculitis, furunculosis, with severe vasculitis affecting the dermal capillaries, venules and arterioles. Rare intracytoplasmic inclusions were present in degenerated epidermal cells. Subacute cases showed multifocal areas of pannicular infarction with severe vasculitis affecting the neighboring arterioles and venules. Strong positive immunoreactivity for LSDV was identified primarily within macrophages and in degenerated epidermal cells. However, no viral antigen was present in endothelial cells. It can be concluded that vasculitis is a constant lesion in acute and subacute LSD and is most likely of an immune-mediated mechanism rather than a true tropism of the LSDV to endothelial cells.

  9. RCAS1 expression in mobile tongue squamous cell carcinoma: an immunohistochemical study.

    Science.gov (United States)

    Theocharis, Stamatios; Klijanienko, Jerzy; Giaginis, Constantinos; Rodriguez, Jose; Jouffroy, Thomas; Girod, Angelique; Tsourouflis, Gerasimos; Sastre-Garau, Xavier

    2011-08-01

    The receptor-binding cancer antigen expressed on SiSo cells (RCAS1) is a human tumor-associated antigen that has been considered to play a crucial role in tumor progression by enabling cancer cells to evade immune surveillance. The present study aimed to evaluate the clinical significance of RCAS1 expression in mobile tongue squamous cell carcinoma (SCC). RCAS1 protein expression was assessed immunohistochemically on 49 mobile tongue SCC tissue samples obtained from an equal number of patients and was statistically analyzed with clinicopathological characteristics and overall and disease-free patients' survival. Enhanced RCAS1 expression was significantly associated with reduced depth of invasion (p=0.0069), low mitotic index (p=0.0251) and no evidence of muscular invasion (p=0.0098). A borderline association between RCAS1 expression and stromal inflammatory reaction was also noted (p=0.0660). RCAS1 expression was not associated with overall and disease-free survival. Our data support evidence for possible implication of RCAS1 at the early stage of tumor progression in mobile tongue SCC, whereas the survival prediction using RCAS1 expression as a clinical marker seems uncertain for this type of malignancy.

  10. Carcinoembryonic antigen (CEA)

    International Nuclear Information System (INIS)

    Ephraim, K.H.; Cox, P.H.; Hamer, C.J.A. v.d.; Berends, W.; Delhez, H.

    1977-01-01

    The carcinoembryonic antigen (CEA) is a complex of antigen determinants and also the carrier of these determinants. Chemically it is a glycoprotein. Its occurrence in blood serum or urine is correlated with malignant disease. Several radioimmunoassays (RIA) have been developed, one by Hoffmann-Laroche and one by the Rotterdam Radiotherapeutic Institute. Both methods and the Hoffmann assay kit are tested. Specifications are given for isolation of the antigen, preparation of the antiserum, and the execution of the RIA. Biochemical and clinical aspects are discussed

  11. Clinicopathological characteristics of patients of certain molecular subtypes and elevated postoperative cancer antigen 15.3 levels and its correlation with menopausal status

    Directory of Open Access Journals (Sweden)

    Soumi Saha

    2016-01-01

    Full Text Available Context: It is well established that breast cancer subtypes differ in their outcome and treatment response. Aim: To observe tumor characteristics of different molecular subgroup and patients with postoperative (PO raised cancer antigen 15.3 (CA 15.3 group and variation of tumor nature between pre- and post-menopausal breast cancer patients. Materials and Methods: Blood samples and tumor blocks were collected from 95 nonmetastatic female breast cancer patients. Immunohistochemical stains for estrogen receptors (ER, progesterone receptor (PR, and HER2/Neu were used to classify molecular subtypes. CA 15.3 level was detected by ELISA. Significance levels were ascertained by Pearson Chi-square test. Results: Prevalence of luminal A tumor with grade 3 was high. Triple negative and ER positive (ER+ types showed tumors with high grade and high lymph node (LN metastasis. More nodal involvement was noticed in patients with PO raised CA 15.3. In addition, premenopausal patients with triple-negative and ER+ subtypes exhibited more aggressive tumors which were characterized by high grade and large numbers of LN metastasis. Conclusion: Clinicopathological characteristics of certain molecular subtypes and influence of menopausal status on it can predict disease recurrence or overall survival of breast cancer patients.

  12. Expression of human tumor-associated antigen RCAS1 in Reed-Sternberg cells in association with Epstein-Barr virus infection: a potential mechanism of immune evasion.

    Science.gov (United States)

    Ohshima, K; Muta, K; Nakashima, M; Haraoka, S; Tutiya, T; Suzumiya, J; Kawasaki, C; Watanabe, T; Kikuchi, M

    2001-07-01

    RCAS1 (receptor-binding cancer antigen expressed on SiSo cells) is present in neoplastic cells, induces apoptosis of natural killer (NK)/T cells and plays a role in immune evasion. Fas ligand (FasL) is considered to have similar roles. The Epstein-Barr virus (EBV)-encoded latent membrane protein is expressed by malignant Hodgkin and Reed-Sternberg (H&RS) cells of EBV-associated Hodgkin's disease (HD) and considered to be a target of cytotoxic T lymphocytes (CTLs). However, CTL response is inadequate in HD. To determine whether RCAS1 and FasL are expressed in EBV-associated HD and participate in immune evasion, tissues of 20 EBV(-) and 15 EBV(+) HD cases were immunohistochemically stained for RCAS1, FasL and HLA classes I and II, whose deficiencies could explain CTL escape. Lymphocytes surrounding H&RS cells tended to be CD4(+) cells and rarely CD8(+), TIA-1(+) (cytotoxic marker) or NK cells. HLA class I and/or II were expressed in all EBV(+) HD cases, and RCAS1-expressing H&RS cells were found in 14/15 (93%) EBV(+) HD cases but only 8/20 (40%) EBV(-) HD cases (p immune response by expressing RCAS1 rather than FasL. Copyright 2001 Wiley-Liss, Inc.

  13. Immunohistochemical analysis of the gingiva with periodontitis of type I plasminogen deficiency compared to gingiva with gingivitis and periodontitis and healthy gingiva.

    Science.gov (United States)

    Kurtulus Waschulewski, Idil; Gökbuget, Aslan Y; Christiansen, Nina M; Ziegler, Maike; Schuster, Volker; Wahl, Gerhard; Götz, Werner

    2016-12-01

    Type I plasminogen deficiency (Plgdef) is an uncommon chronic inflammation of mucous membranes. Gingival enlargements usually proceed with progressive periodontal destruction and tooth-loss. Plasmin(ogen)-independent enzymatic mechanisms for fibrin clearance have already been discussed in the literature. Our primary objective was to verify, immunohistochemically, the occurrence of different enzymatic factors involved in tissue breakdown of inflamed compared to healthy gingiva. Secondly, we tried to find out, if these patients have a similar microbiological profile to the patients with known gingivitis and periodontitis. Immunohistochemical analysis of enzymes elastase, plasminogen (plg), cathepsin G, matrix-metalloproteinase (MMP)-3 and MMP-7 and of glycoprotein fibrinogen were performed with gingival tissues from 3 healthy controls, 8 patients with Plgdef and 3 patients with gingivitis and periodontitis. Furthermore, plaque from 5 patients with plasminogen deficiency were also obtained to determine the microbiological profile. Significantly high numbers of elastase positive leukocytes were detected in all samples. Staining for MMP-3 and MMP-7 was seen in samples with gingivitis and periodontitis with a stronger staining in samples with periodontitis by Plgdef. Fibrinogen was detectable in all samples. Staining for plg was stronger in samples with periodontitis than in other samples. Staining for cathepsin G was weak in gingivitis and periodontitis. Subgingival microbial flora showed elevated colony forming units of Prevotella intermedia/nigrescens, Fusobacterium spp., Eikenella corrodens, Porphyromonas gingivalis and viridans streptococci. Strong staining of elastase, MMP-3 and MMP-7 and weak staining of plg in Plgdef samples supports the plasmin(ogen) - independent fibrin clearance. Similar subgingival microbiological flora was observed in periodontitis with Plgdef as in other periodontal diseases. Further investigations should determine the exact pathomechanism

  14. Microwave-Assisted Tissue Preparation for Rapid Fixation, Decalcification, Antigen Retrieval, Cryosectioning, and Immunostaining

    Science.gov (United States)

    2016-01-01

    Microwave irradiation of tissue during fixation and subsequent histochemical staining procedures significantly reduces the time required for incubation in fixation and staining solutions. Minimizing the incubation time in fixative reduces disruption of tissue morphology, and reducing the incubation time in staining solution or antibody solution decreases nonspecific labeling. Reduction of incubation time in staining solution also decreases the level of background noise. Microwave-assisted tissue preparation is applicable for tissue fixation, decalcification of bone tissues, treatment of adipose tissues, antigen retrieval, and other special staining of tissues. Microwave-assisted tissue fixation and staining are useful tools for histological analyses. This review describes the protocols using microwave irradiation for several essential procedures in histochemical studies, and these techniques are applicable to other protocols for tissue fixation and immunostaining in the field of cell biology. PMID:27840640

  15. Laser therapy in plastic surgery: decolorization in port wine stains

    Science.gov (United States)

    Peszynski-Drews, Cezary; Wolf, Leszek

    1996-03-01

    For the first time laserotherapy is described as a method of port wine stain decolorization in plastic surgery. The authors present their 20-year experience in the treatment of port wine stains with the argon laser and dye laser.

  16. Port wine stain on a child's face (image)

    Science.gov (United States)

    Port wine stains are always present at birth. In an infant, they are flat, pink, vascular lesions. Common locations ... may be present anywhere on the body. Port wine stains may appear in association with other syndromes.

  17. The degradation of Romanowsky-type blood stains in methanol.

    Science.gov (United States)

    Dean, W W; Stastny, M; Lubrano, G J

    1977-01-01

    The oxidative demethylation of Romanowsky-type stains in methanol has been examined quantitatively with respect to its effect upon the staining of blood smears. Spectral changes in bound dye, observed through two color filters, have been measured for the nuclei and cytoplasm of segmented neutrophils and monocytes utilizing the LARC automated differential analyzer. Stain decomposition in methanol results in a large loss in staining intensity with little change in color. The loss in intensity has been correlated with the observed spectral changes in the degraded stain. High-performance liquid chromatographic analysis of degraded stain samples has shown the products of methanolic degradation to be different from those obtained in aqueous polychroming reactions. To maintain a stain of defined thiazine dye composition and thus defined staining properties, refrigeration is recommended.

  18. Several staining techniques to enhance the visibility of Acanthamoeba cysts.

    Science.gov (United States)

    El-Sayed, Nagwa Mostafa; Hikal, Wafaa Mohamed

    2015-03-01

    Acanthamoeba is one of the most common free-living amoebae. It is widespread in the environment and can infect humans causing keratitis. Delayed diagnosis or misdiagnosis leads to extensive corneal inflammation and profound visual loss. Therefore, accurate and rapid diagnosis of Acanthamoeba keratitis is essential for successful treatment and good prognosis. This study was designed to use different staining techniques to facilitate the identification of Acanthamoeba cysts. Acanthamoeba cysts were isolated by cultivation of either corneal scraping specimens or tap water samples onto non-nutrient agar plates seeded with Escherichia coli. Subcultures were done from positive cultures until unique cysts were isolated. Acanthamoeba cysts were stained temporarily using iodine, eosin, methylene blue, and calcofluor white (CFW) stains and as permanent slides after processing for mounting using modified trichrome, Gimenez and Giemsa staining. These stains were compared on the basis of staining quality including clarity of morphological details, differentiation between cytoplasm and nuclei, color and contrast, and also other characteristics of the staining techniques, including ease of handling, time taken for the procedure, and cost effectiveness. The cysts of Acanthamoeba were recognized in the form of double-walled cysts: the outer wall (ectocyst) that was being differentiated from the variably stained surrounding background and the inner wall (endocyst) that was sometimes stellated, polygonal, round, or oval and visualized as separate from the spherical, sometimes irregular, outline of the ectocyst. Regarding the temporary stains, it was found that they were efficient for visualizing the morphological details of Acanthamoeba cysts. In CFW staining, Acanthamoeba cysts appeared as bluish-white or turquoise oval halos although the internal detail was not evident. On the other hand, the results of permanent-stained slides showed the most consistent stain for identification of

  19. A Historical Perspective on the Identification of Cell Types in Pancreatic Islets of Langerhans by Staining and Histochemical Techniques.

    Science.gov (United States)

    Baskin, Denis G

    2015-08-01

    Before the middle of the previous century, cell types of the pancreatic islets of Langerhans were identified primarily on the basis of their color reactions with histological dyes. At that time, the chemical basis for the staining properties of islet cells in relation to the identity, chemistry and structure of their hormones was not fully understood. Nevertheless, the definitive islet cell types that secrete glucagon, insulin, and somatostatin (A, B, and D cells, respectively) could reliably be differentiated from each other with staining protocols that involved variations of one or more tinctorial techniques, such as the Mallory-Heidenhain azan trichrome, chromium hematoxylin and phloxine, aldehyde fuchsin, and silver impregnation methods, which were popularly used until supplanted by immunohistochemical techniques. Before antibody-based staining methods, the most bona fide histochemical techniques for the identification of islet B cells were based on the detection of sulfhydryl and disulfide groups of insulin. The application of the classical islet tinctorial staining methods for pathophysiological studies and physiological experiments was fundamental to our understanding of islet architecture and the physiological roles of A and B cells in glucose regulation and diabetes. © The Author(s) 2015.

  20. Dye purity and dye standardization for biological staining

    DEFF Research Database (Denmark)

    Lyon, H O

    2002-01-01

    for separating, identifying and assaying dye components. In the second part of the review, descriptions are given of the standardized staining method approach using standard staining methods for assessing stains, and practical responses to stain impurity including commercial quality control, third-party quality...... control and standardization of reagents, protocols and documentation. Finally, reference is made to the current state of affairs in the dye field....

  1. Immunohistochemical localization of epidermal growth factor in rat and man

    DEFF Research Database (Denmark)

    Poulsen, Steen Seier; Nexø, Ebba

    1986-01-01

    Epidermal growth factor (EGF) is a peptide which stimulates cell mitotic activity and differentiation, has a cytoprotective effect on the gastroduodenal mucosa, and inhibits gastric acid secretion. The immunohistochemical localization of EGF in the Brunner's glands and the submandibular glands is...... antisera against human urinary EGF worked in rat as well as man. EGF was found only in cells with an exocrine function.......Epidermal growth factor (EGF) is a peptide which stimulates cell mitotic activity and differentiation, has a cytoprotective effect on the gastroduodenal mucosa, and inhibits gastric acid secretion. The immunohistochemical localization of EGF in the Brunner's glands and the submandibular glands...... is well documented. The localization of EGF in other tissues is still unclarified. In the present study, the immunohistochemical localization of EGF in tissues from rat, man and a 20 week human fetus were investigated. In man and rat, immunoreaction was found in the submandibular glands, the serous glands...

  2. LOCALIZATION OF ANTIGEN IN TISSUE CELLS

    Science.gov (United States)

    Coons, Albert H.; Leduc, Elizabeth H.; Kaplan, Melvin H.

    1951-01-01

    The fate of three proteins, crystalline hen's egg albumin, crystalline bovine plasma albumin, and human plasma γ-globulin, was traced after intravenous injection into mice. This was done by preparing frozen sections of quick-frozen tissue, allowing what foreign protein might be present in the section to react with homologous antibody labelled with fluorescein, and examining the section under the fluorescence microscope. By this means, which employs the serological specificity of the protein as a natural "marker," all three of these proteins were found in the cells of the reticulo-endothelial system, the connective tissue, the vascular endothelium, the lymphocytes of spleen and lymph node, and the epithelium of the kidney tubules, the liver, and in very small amounts in the adrenal. The central nervous system was not studied. All three persisted longest in the reticulo-endothelial system and the connective tissue, and in the doses employed egg white (10 mg.) was no longer detectable after 1 day, bovine albumin (10 mg.) after 2 days, and human γ-globulin (4 mg.) after 6 days, although in a somewhat higher dose (10 mg.) human γ-globulin persisted longer than 8 days. Egg albumin differed from the others in not being detectable in the cells of the renal glomerulus. It was found that each of the three proteins was present in the nuclei of each cell type enumerated above, often in higher concentration than in the cytoplasm. Further, some of the nuclei not only contained antigen, soon after injection, but were also surrounded by a bright ring associated with the nuclear membrane. By means of photographic records under the fluorescence microscope of sections stained for antigen, and direct observation under the light microscope of the same field subsequently stained with hematoxylin and eosin, it could be determined that the antigen was not adsorbed to chromatin or nucleoli, but was apparently in solution in the nuclear sap. PMID:14803641

  3. Comparison between Giemsa and Van Geison stains in ...

    African Journals Online (AJOL)

    Trichrome stain (such as Van Geison) is usually used in histopathology laboratory for demonstration of collagenic fibers. Lack of selectivity and tendency of stain to fade makes van Gieson not ideal for collagen demonstration. This study was aimed to compare between Giemsa's and van Gieson's stains in collagen fibers ...

  4. Modified ultrafast Papanicolaou staining technique: A comparative study

    Science.gov (United States)

    Thakur, Moni; Guttikonda, Venkateswara Rao

    2017-01-01

    Introduction: Ultrafast Papanicolaou stain (UFP) was introduced as a hybrid of Romanowsky and Papanicolaou (PAP) stain. It enhances the quality and reduces the time. In the present study, a modified staining technique was adapted where Gill's Hematoxylin was replaced by Harris Hematoxylin. Aims: The aim of the study was to assess the use of the modified ultrafast Papanicolaou (MUFP) stain for fine needle aspiration cytology (FNAC) of head and neck swellings in comparison with the routine PAP stain, hematoxylin and eosin (H and E), and Giemsa. Materials and Methods: Forty FNACs of head and neck swellings were collected. FNAC procedure was performed by standard method; two smears were fixed in 95% propanol and stained with PAP and H and E. Two smears were air dried, 1 was stained with Giemsa, and 1 was rehydrated with normal saline, fixed in alcoholic formalin, and stained with MUFP. Four parameters were considered and scored background, cell morphology, nuclear staining, and overall staining pattern). Results: The quality of MUFP smears were better when compared to routine PAP, H and E, and Giemsa, and was statistically significant by Wilcoxon matched pair test. Conclusions: MUFP stain in comparison to routine PAP, H and E, and Giemsa provides an excellent and suitable alterative in cytological staining for the study of various organs. PMID:28701828

  5. Modified ultrafast Papanicolaou staining technique: A comparative study

    Directory of Open Access Journals (Sweden)

    Moni Thakur

    2017-01-01

    Full Text Available Introduction: Ultrafast Papanicolaou stain (UFP was introduced as a hybrid of Romanowsky and Papanicolaou (PAP stain. It enhances the quality and reduces the time. In the present study, a modified staining technique was adapted where Gill's Hematoxylin was replaced by Harris Hematoxylin. Aims: The aim of the study was to assess the use of the modified ultrafast Papanicolaou (MUFP stain for fine needle aspiration cytology (FNAC of head and neck swellings in comparison with the routine PAP stain, hematoxylin and eosin (H and E, and Giemsa. Materials and Methods: Forty FNACs of head and neck swellings were collected. FNAC procedure was performed by standard method; two smears were fixed in 95% propanol and stained with PAP and H and E. Two smears were air dried, 1 was stained with Giemsa, and 1 was rehydrated with normal saline, fixed in alcoholic formalin, and stained with MUFP. Four parameters were considered and scored background, cell morphology, nuclear staining, and overall staining pattern. Results: The quality of MUFP smears were better when compared to routine PAP, H and E, and Giemsa, and was statistically significant by Wilcoxon matched pair test. Conclusions: MUFP stain in comparison to routine PAP, H and E, and Giemsa provides an excellent and suitable alterative in cytological staining for the study of various organs.

  6. Comparison between Giemsa and Van Geison stains in ...

    African Journals Online (AJOL)

    Rukevwe S. Abraka

    2016-09-14

    Sep 14, 2016 ... Trichrome stain (such as Van Geison) is usually used in histopathology laboratory for demonstration of collagenic fibers. Lack of selectivity and tendency of stain to fade makes van Gieson not ideal for collagen demonstration. This study was aimed to compare between Giemsa's and van Gieson's stains.

  7. 7 CFR 28.442 - Middling Yellow Stained Color.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 2 2010-01-01 2010-01-01 false Middling Yellow Stained Color. 28.442 Section 28.442... Stained Color. Middling Yellow Stained Color is American Upland cotton which in color is deeper than Middling Tinged Color. [57 FR 34498, Aug. 5, 1992] below color grade cotton ...

  8. 7 CFR 28.441 - Strict Middling Yellow Stained Color.

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 2 2010-01-01 2010-01-01 false Strict Middling Yellow Stained Color. 28.441 Section... Strict Middling Yellow Stained Color. Strict Middling Yellow Stained Color is color which is deeper than that of Strict Middling Tinged Color. [57 FR 34498, Aug. 5, 1992] ...

  9. Epigenetic regulation of L1CAM in endometrial carcinoma: comparison to cancer–testis (CT-X) antigens

    International Nuclear Information System (INIS)

    Schirmer, Uwe; Fiegl, Heidi; Pfeifer, Marco; Zeimet, Alain G; Müller-Holzner, Elisabeth; Bode, Peter K; Tischler, Verena; Altevogt, Peter

    2013-01-01

    L1CAM was originally identified as an adhesion molecule involved in neural development. In many human carcinomas L1CAM is over-expressed and is associated with a bad prognosis. We previously reported that L1CAM was absent in the vast majority of endometrioid endometrial carcinomas (ECs) (type 1) but was strongly expressed in the more aggressive serous and clear-cell ECs (termed type 2). The differential regulation of L1CAM in ECs is not well understood. Recent evidence suggests that it can be regulated by epigenetic mechanisms. Here we investigated the role of DNA-methylation of the L1CAM promoter for expression. We also studied the relationship to cancer testis (CT-X) antigens that co-localize with L1CAM on chromosome Xq28, a region that is often activated in human tumors. We used EC cell lines and primary tumor tissues for our analysis. For expression analysis we employed RT-PCR and Western blotting. DNA-Methylation of the L1CAM promoter was determined after bisulfite conversation and DNA sequencing. Tumor tissues were examined by immunohistochemical (IHC) staining. We demonstrate that the treatment of L1CAM low/negative expressing EC cell lines with 5 ′ -Azacytidine (5-AzaC) or knock-down of DNMT1 (DNA methyltransferase 1) as well as the HDAC (histone deacetylase) inhibitor Trichostatin A (TSA) up-regulated L1CAM at the mRNA and protein level. The L1CAM gene has two promoter regions with two distinct CpG islands. We observed that the expression of L1CAM correlated with hypermethylation in promoter 1 and 5-AzaC treatment affected the DNA-methylation pattern in this region. The CT-X antigens NY-ESO-1, MAGE-A3 and MAGE-A4 were also strongly up-regulated by 5-AzaC or knock-down of DNMT1 but did not respond to treatment with TSA. Primary EC tumor tissues showed a variable methylation pattern of the L1CAM promoter. No striking differences in promoter methylation were observed between tumor areas with L1CAM expression and those without expression. L1CAM expression

  10. Exposure of pregnant sows to deoxynivalenol during 35-70 days of gestation does not affect pathomorphological and immunohistochemical properties of fetal organs.

    Science.gov (United States)

    Wippermann, Wolf; Heckmann, Anne; Jäger, Kathrin; Dänicke, Sven; Schoon, Heinz-Adolf

    2017-12-29

    In order to evaluate the influence of deoxynivalenol (DON) on histomorphological and immunohistochemical parameters in the development of porcine fetuses, five pregnant sows were fed a control diet (0.15 mg DON/kg diet) and seven sows a contaminated diet (4.42 mg DON/kg diet) between days 35 and 70 of gestation. On day 70, fetuses were delivered by caesarean section and sows and fetuses were euthanized. Tissue samples of three fetuses from each sow were collected, fixed in formalin, and processed routinely for light microscopy and immunohistochemistry. At necropsy, no macroscopic lesions were observed in any organ of the fetuses. Histomorphological, immunohistochemical, and morphometrical parameters of the immune system, liver, and intestinal tract were examined. The following antibodies were used in the liver, spleen, lymph nodes, thymus, gut, and bone marrow to compare control- and DON-treated animals: (I) CD3 and CD79a (T and B lymphocytes differentiation); (II) myeloid/histiocyte antigen 387 (MAC) (identification of macrophages); (III) Ki-67 Antigen (Ki-67) (proliferation marker); (IV) p-p-38 mitogen-activated protein kinases (p-p38 MAPK) as well as caspase-3 (cas3) and caspase-9 (cas9) (enzymes of apoptosis cascade); (V) tumor necrosis factor-alpha (TNFα) (immune-related protein). The results of the study show that exposure of pregnant sows with DON between gestation days 35 and 70 causes no pathomorphologically or immunohistochemically detectable alterations in all fetal organs examined.

  11. SENSITIVITY AND SPECIFICITY OF MONOCLONAL ANTIBODY DSSE10 IN HEAD SQUASH TOXORHYNCHITES SPLENDENS USING IMMUNOHISTOCHEMICAL PEROXIDASE TECHNIQUE

    Directory of Open Access Journals (Sweden)

    Tika Fiona Sari

    2014-06-01

    Full Text Available Dengue virus are transmitted from human to human by the bites of infective female Aedesmosquitoes from subgenus Stegomyia. One of the way to detect Dengue virus antigen is by usingimmunohistochemical technique. This method was reported to detect dengue vims antigen in lowlevels. The aims of this study is to measure sensitivity and specificity of monoclonal antibodyDSSE10 using SBPC to detect antigen Dengue virus in head squash Toxorhynchites splendenswere infected with dengue patient serum and RT-PCR as gold standart. Artificially-infected Tx.splendens mosquitoes with serum positif dengue virus were used as infectious samples and noninfectedTx. splendens mosquitoes were used as control negative. The immunohistochemichalSBPC assay using monoclonal antibody DSSE10 then applied in mosquitoes head squash todetect Dengue vims antigen. RT-PCR as a gold standart was applied in each mosquito thorax.The result were analyzed by descriptive stasistic test and 2x2 diagnostic test table. Monoclonalantibody DSSE10 using immunohistochemical SBPC assay in head squash Tx. splendens wasgave sensitivity 87,09% and specificity 92,5%. Conclussion of this study is DSSE10 Monoclonalantibodies can be used as primary antibodies for the detection of dengue vims antigen inmosquito head squashKeywords: Dengue viruses, SBPC, antibodies DSSE10, head squash, Toxorhynchitessplendens' Virus Dengue ditularkan dari orang ke orang melalui gigitan nyamuk Aedes dari subgenusStegomyia. Salah satu cara untuk mendeteksi antigen vims Dengue adalah dengan menggunakanteknik imunohistokimia. Metode imunohistokimia dilaporkan dapat mendeteksi antigen vimsDengue dalam kadar yang rendah. Tujuan penelitian ini adalah melakukan evaluasi sensitivitasdan spesifitas antibodi monoklonal DSSE10 dengan metode imunohistokimia Streptavidin BiotinPeroxidase Complex (SBPC untuk mendeteksi antigen Dengue melalui scdiaan head squashnyamuk Toxorhynchites splendens yang diinfeksi dengan scrum penderita

  12. Selfish spermatogonial selection: evidence from an immunohistochemical screen in testes of elderly men.

    Directory of Open Access Journals (Sweden)

    Jasmine Lim

    Full Text Available The dominant congenital disorders Apert syndrome, achondroplasia and multiple endocrine neoplasia-caused by specific missense mutations in the FGFR2, FGFR3 and RET proteins respectively-represent classical examples of paternal age-effect mutation, a class that arises at particularly high frequencies in the sperm of older men. Previous analyses of DNA from randomly selected cadaveric testes showed that the levels of the corresponding FGFR2, FGFR3 and RET mutations exhibit very uneven spatial distributions, with localised hotspots surrounded by large mutation-negative areas. These studies imply that normal testes are mosaic for clusters of mutant cells: these clusters are predicted to have altered growth and signalling properties leading to their clonal expansion (selfish spermatogonial selection, but DNA extraction eliminates the possibility to study such processes at a tissue level. Using a panel of antibodies optimised for the detection of spermatocytic seminoma, a rare tumour of spermatogonial origin, we demonstrate that putative clonal events are frequent within normal testes of elderly men (mean age: 73.3 yrs and can be classed into two broad categories. We found numerous small (less than 200 cells cellular aggregations with distinct immunohistochemical characteristics, localised to a portion of the seminiferous tubule, which are of uncertain significance. However more infrequently we identified additional regions where entire seminiferous tubules had a circumferentially altered immunohistochemical appearance that extended through multiple serial sections that were physically contiguous (up to 1 mm in length, and exhibited enhanced staining for antibodies both to FGFR3 and a marker of downstream signal activation, pAKT. These findings support the concept that populations of spermatogonia in individual seminiferous tubules in the testes of older men are clonal mosaics with regard to their signalling properties and activation, thus fulfilling

  13. Interrelationship of clinical, histomorphometric and immunohistochemical features of oral lesions in chronic paracoccidioidomycosis.

    Science.gov (United States)

    de Abreu E Silva, Mariana À; Salum, Fernanda G; Figueiredo, Maria A; Lopes, Tiago G; da Silva, Vinicius D; Cherubini, Karen

    2013-03-01

    This study aimed to analyze the oral lesions of chronic paracoccidioidomycosis concerning their histomorphometric, immunohistochemical, and clinical features in a standardized sample. Fifty biopsy specimens of oral lesions of chronic paracoccidioidomycosis were submitted to hematoxylin and eosin (H&E), Grocott-Gomori and immunohistochemical staining. Data regarding disease duration and size and number of oral lesions, as well as erythrocytes, leukocytes, lymphocytes, hematocrit, hemoglobin, and erythrocyte sedimentation rate, were collected from medical charts. Granuloma density and number and diameter of buds and fungal cells, and IL-2, TNF-alpha and IFN-gamma expression, as well as clinical and hematological features, were quantified and correlated. Bud diameter was significantly greater in intermediate density granulomas compared to higher density granulomas. The other variables (number of buds, number and diameter of fungi, expression of IL-2, TNF-alpha and IFN-gamma, and clinical and hematological features) did not significantly change with the density of granulomas. There was a positive correlation between bud number and fungal cell number (r = 0.834), bud diameter and fungal cell diameter (r = 0.496), erythrocytes and number of fungi (r = 0.420), erythrocytes and bud number (r = 0.408), and leukocytes and bud number (r = 0.396). Negative correlation occurred between number and diameter of fungi (r = -0.419), bud diameter and granuloma density (r = -0.367), TNF-alpha expression and number of fungi (r = -0.372), and TNF-alpha expression and bud number (r = -0.300). The histological, immunological, and clinical features of oral lesions evaluated did not differ significantly between patients in our sample of chronic paracoccidioidomycosis. TNF-alpha levels were inversely correlated with intensity of infection. © 2012 John Wiley & Sons A/S. Published by Blackwell Publishing Ltd.

  14. Observations on the right ovary of birds of prey: a histological and immunohistochemical study.

    Science.gov (United States)

    Rodler, D; Stein, K; Korbel, R

    2015-06-01

    In most avian species, only the left ovary and oviduct are developed in the adult bird. Right ovaries and oviducts usually do not mature further after hatching and remain only rudimentary. However, occurrence of a functional right ovary is frequently found in several species of birds of prey. In this study, we investigated the occurrence of the right ovaries and their morphology in these bird species. Four examined wild bird species possessed a right ovary: long-eared owl, common buzzard, sparrow hawk and goshawk. We used histological and immunohistochemical techniques to evaluate structural differences of the gonads and tried to correlate the findings with folliculogenesis and endocrine functions. The right ovaries showed different sizes and shapes. Cytoskeletal elements (tubulin and vimentin) and α-smooth muscle actin have been detected in different structures of the right ovaries, but their staining intensity was weaker compared with the left ovary. This shows that also the right ovary is mechanically able to ovulate. We could also demonstrate the expression of oestrogen receptor α and progesterone receptor in the right ovaries, which indicates that also the right ovary can respond to steroid hormone stimuli. We assume that the expression of steroid hormone receptors in the presumptive gonad is still sufficient to mediate the development of a right ovary in the studied species. We conclude that the expression of steroid hormone receptors in the right ovary is involved in its post-natal development. The histological and immunohistochemical data also imply that in the right ovary, folliculogenesis and ovulation can occur. © 2014 Blackwell Verlag GmbH.

  15. Immunohistochemical detection of p16INK4a in dysplastic lesions of the oral cavity.

    Science.gov (United States)

    Bradley, Kyle T; Budnick, Steven D; Logani, Sanjay

    2006-10-01

    Significant intra- and interobserver variability exists in diagnosing and grading oral epithelial dysplasia. Mutations in the tumor-suppressor gene p16 are common in oral cavity dysplastic lesions, but whether immunohistochemical detection of the gene product p16(INK4a) (p16) can be used as a reliable biomarker for dysplasia is unclear. In total, 119 biopsy specimens representing various oral cavity sites and degrees of dysplasia were retrieved from the pathology files of Emory University Hospital. Formalin-fixed, paraffin-embedded sections were stained with hematoxylin and eosin (H&E) and with a monoclonal antibody to p16 (LabVision Corporation, Clone JC2). A blinded review of the H&E slides and the pattern and degree of p16 expression was independently performed by two pathologists. A consensus was obtained when diagnoses differed. Morphologic diagnoses were then compared to p16 immunohistochemical expression. Overall, 61/119 (51%) cases showed no p16 immunoreactivity, including 12/33 (36%) cases of no dysplasia, 11/28 (39%) cases of mild dysplasia, and 38/58 (66%) cases of moderate/severe dysplasia. The remaining cases showed p16 expression limited to the basal and suprabasal nuclei and generally confined to the lower one-third of the epithelium. A logistic regression model showed a trend toward absent p16 expression with increasing severity of dysplasia (P=0.006). Decreased expression of p16 in dysplastic lesions, as found in this study, may reflect the biologic events involving loss of p16 gene function in the pathogenesis of oral cancer. Our findings suggest that p16 immunohistochemistry is not helpful in differentiating dysplastic from nondysplastic mucosa in oral cavity biopsies, and thus is not a reliable biomarker for use in routine clinical practice.

  16. Immunohistochemical evaluation of proliferation, apoptosis and steroidogenic enzymes in the ovary of rats with polycystic ovary

    Directory of Open Access Journals (Sweden)

    Leonardo Augusto Lombardi

    2014-07-01

    Full Text Available Objective: to evaluate the immunohistochemical expression of proliferative, apoptotic and steroidogenic enzyme markers in the ovaries of rats with polycystic ovary syndrome (PCOS. Methods: twenty rats were divided into two groups: GCtrl - estrous phase, and PCOS - with polycystic ovaries. The GCtrl animals were subjected to a lighting period from 7 am to 7 pm, while the animals with PCOS group remained with continuous lighting for 60 days. Subsequently, the animals were anesthetized, the ovaries were removed and fixed in 10% formaldehyde, prior to paraffin embedding. Sections were stained using H.E. or subjected to immunohistochemical methods for the detection of Ki-67, cleaved caspase-3, CYP11A1, CYP17A1 and CYP19A1. The results were analyzed using Student's t-test (p < 0,05. Results: morphological results showed evidence of interstitial cells originating from the inner theca cells of degenerating ovarian cysts in PCOS. Immunoexpression of Ki-67 was higher in the granulosa cells in GCtrl, and the theca interna cells in PCOS, while cleaved caspase-3 was higher in granulosa cells of ovarian cysts from PCOS and in the theca interna cells of GCtrl. Immunoreactivity of CYP11A1 in the theca interna, granulosa and interstitial cells was similar between the two groups, while CYP17A1 and CYP19A1 were higher in the granulosa and interstitial cells in the PCOS group. Conclusion: the results indicate that the interstitial cells are derived from the theca interna and that enzymatic changes occur in the theca interna and interstitial cells in ovaries of rats with PCOS, responsible for the high levels of androgens and estradiol.

  17. Selfish spermatogonial selection: evidence from an immunohistochemical screen in testes of elderly men.

    Science.gov (United States)

    Lim, Jasmine; Maher, Geoffrey J; Turner, Gareth D H; Dudka-Ruszkowska, Wioleta; Taylor, Stephen; Rajpert-De Meyts, Ewa; Goriely, Anne; Wilkie, Andrew O M

    2012-01-01

    The dominant congenital disorders Apert syndrome, achondroplasia and multiple endocrine neoplasia-caused by specific missense mutations in the FGFR2, FGFR3 and RET proteins respectively-represent classical examples of paternal age-effect mutation, a class that arises at particularly high frequencies in the sperm of older men. Previous analyses of DNA from randomly selected cadaveric testes showed that the levels of the corresponding FGFR2, FGFR3 and RET mutations exhibit very uneven spatial distributions, with localised hotspots surrounded by large mutation-negative areas. These studies imply that normal testes are mosaic for clusters of mutant cells: these clusters are predicted to have altered growth and signalling properties leading to their clonal expansion (selfish spermatogonial selection), but DNA extraction eliminates the possibility to study such processes at a tissue level. Using a panel of antibodies optimised for the detection of spermatocytic seminoma, a rare tumour of spermatogonial origin, we demonstrate that putative clonal events are frequent within normal testes of elderly men (mean age: 73.3 yrs) and can be classed into two broad categories. We found numerous small (less than 200 cells) cellular aggregations with distinct immunohistochemical characteristics, localised to a portion of the seminiferous tubule, which are of uncertain significance. However more infrequently we identified additional regions where entire seminiferous tubules had a circumferentially altered immunohistochemical appearance that extended through multiple serial sections that were physically contiguous (up to 1 mm in length), and exhibited enhanced staining for antibodies both to FGFR3 and a marker of downstream signal activation, pAKT. These findings support the concept that populations of spermatogonia in individual seminiferous tubules in the testes of older men are clonal mosaics with regard to their signalling properties and activation, thus fulfilling one of the

  18. Case of Mycobacterium tuberculosis meningitis: Gram staining as a useful initial diagnostic clue for tuberculous meningitis.

    Science.gov (United States)

    Kawakami, Sayoko; Kawamura, Yasuyosi; Nishiyama, Kyouhei; Hatanaka, Hiroki; Fujisaki, Ryuichi; Ono, Yasuo; Miyazawa, Yukihisa; Nishiya, Hajime

    2012-12-01

    A 32-year-old man was admitted to our hospital because of fever, headache, and loss of consciousness. Four days before admission, he had had difficulty speaking. On the day of admission, his colleague had found him to be unconscious and lying on his back. He was admitted to our hospital. The temperature at the eardrum was 35.2°C. Neurologic evaluation was negative. Computed tomography (CT) scan of the brain showed slight ventricular enlargement bilaterally. An X-ray film of the chest showed no abnormality. On the second hospital day, neck stiffness was noted. The cerebrospinal fluid (CSF) contained 870 white cells/μl, most of which were neutrophils; the glucose level in the CSF was 10 mg/dl, and the protein level was 140 mg/dl. Stained smears of the CSF, including Gram staining and India-ink preparations, disclosed no microorganisms. Capsular antigen tests for several bacteria were negative. Antimicrobial agents were started. However, by changing the microscope focus slightly while viewing Gram stains of the CSF, we could see brightened and Gram-positive bacilli that had been phagocytosed by neutrophils. This finding suggested the presence of Mycobacterium tuberculosis. Ziehl-Neelsen staining of the CSF and gastric juice revealed anti-acid bacilli. Polymerase chain reaction for M. tuberculosis in the gastric juice was positive. This case showed that Gram staining could be useful as an initial adjunct for the diagnosis of tuberculous meningitis, particularly when the CSF shows predominantly neutrocytic pleocytosis, but no other evidence of bacterial meningitis.

  19. Clinical and experimental studies regarding the expression and diagnostic value of carcinoembryonic antigen-related cell adhesion molecule 1 in non-small-cell lung cancer

    International Nuclear Information System (INIS)

    Zhou, Mu-qing; Du, Yan; Liu, Yi-wen; Wang, Ying-zhi; He, Yi-qing; Yang, Cui-xia; Wang, Wen-juan; Gao, Feng

    2013-01-01

    Carcinoembryonic antigen-related cell adhesion molecule 1 (CEACAM1) is a multifunctional Ig-like cell adhesion molecule that has a wide range of biological functions. According to previous reports, serum CEACAM1 is dysregulated in different malignant tumours and associated with tumour progression. However, the serum CEACAM1 expression in non-small-cell lung carcinomas (NSCLC) is unclear. The different expression ratio of CEACAM1-S and CEACAM1-L isoform has seldom been investigated in NSCLC. This research is intended to study the serum CEACAM1 and the ratio of CEACAM1-S/L isoforms in NSCLC. The expression of the serum CEACAM1 was determined by enzyme-linked immunosorbent assay. The protein expression and the location of CEACAM1 in tumours were observed by immunohistochemical staining. The CEACAM1 mRNA levels in tumour and normal adjacent tissues were measured using quantitative real-time PCR, and the expression patterns and the rate of CEACAM1-S and CEACAM1-L were analysed by reverse transcription-PCR. Serum CEACAM1 levels were significantly higher in NSCLC patients compared with that from normal healthy controls (P <0.0001). 17 patients (81%) among 21 showed high expression of CEACAM1 by immunohistochemical staining. Although no significant differences were found between tumour and normal tissues on mRNA expression levels of CEACAM1 (P >0.05), the CEACAM1-S and the CEACAM1-S/L (S: L) ratios were significantly higher in tumour than normal tissues (P <0.05). Our data indicated that the serum levels of CEACAM1 could discriminate lung cancer patients from health donors and that CEACAM1 might be a useful marker in early diagnosis of NSCLC. Moreover, our results showed that the expression patterns of CEACAM1 isoforms could be changed during oncogenesis, even when total CEACAM1 in tumour tissues did not show significant changes. Our study suggested that the expression ratios of CEACAM1-S/CEACAM1-L might be a better diagnostic indicator in NSCLC than the quantitative

  20. Immunohistochemical expression of fibronectin and tenascin in human tooth pulp capped with mineral trioxide aggregate and a novel endodontic cement.

    Science.gov (United States)

    Zarrabi, Mohammad Hassan; Javidi, Maryam; Jafarian, Amir Hossein; Joushan, Bahareh

    2011-12-01

    The purpose of the present study was the immunohistochemical study of fibronectin (FN) and tenascin (TN) in human tooth pulp capped with mineral trioxide aggregate (MTA) and novel endodontic cement (NEC) (calcium enriched mixture cement) after 2 and 8 weeks. Thirty-two premolar teeth that were scheduled for extraction for orthodontic reasons were exposed and capped with either MTA or NEC. The teeth were randomly divided into 4 groups: group 1 (NEC for 2 weeks), group 2 (NEC for 8 weeks), group 3 (MTA for 2 weeks), and group 4 (MTA for 8 weeks). After capping the exposed pulps with either NEC (groups 1 and 2) or MTA (groups 3 and 4), half of the specimens underwent extraction and were prepared for histologic and immunohistochemical evaluation for FN and TN after 2 weeks, and the remaining half were assessed after 8 weeks. FN and TN expression was scored by a blinded pathologist on a scale of I-IV, and the results were analyzed by the Wilcoxon and Mann-Whitney U statistical tests. FN and TN staining was observed in all 4 experimental groups, and there was no significant difference between expression of FN and TN in any groups. FN and TN staining was observed in the dentinal bridge matrix after 2 weeks under MTA. Expression of both markers reduced significantly after 8 weeks under MTA, and staining was observed only in unmineralized parts of dentinal bridge. FN and TN expression was observed in the matrix of the dentinal bridge after 2 weeks under NEC, and staining of both markers was reduced after 8 weeks compared with 2 weeks. The staining pattern of TN in NEC groups was higher than in MTA groups in both time intervals. However, the difference was not significant. The present study demonstrated that both MTA and NEC are suitable biomaterials for direct pulp capping and are able to stimulate dentinal bridge formation. Moreover, the role of FN and TN as 2 major components of the matrix of a reparative dentinal bridge was observed. Copyright © 2011 American

  1. Histopathologic and Immunohistochemical Correlates of Confocal Descriptors in Pigmented Facial Macules on Photodamaged Skin.

    Science.gov (United States)

    Gómez-Martín, Ignacio; Moreno, Sara; Andrades-López, Evelyn; Hernández-Muñoz, Inma; Gallardo, Fernando; Barranco, Carlos; Pujol, Ramon M; Segura, Sonia

    2017-08-01

    Pigmented facial macules on photodamaged skin are a clinical, dermoscopic, and histopathologic challenge. To clinically and dermoscopically characterize, by means of reflectance confocal microscopy (RCM), ambiguous pigmented facial macules and establish a correlation between RCM, histopathologic, and immunohistochemical findings. A prospective study of ambiguous pigmented facial macules on photodamaged skin was conducted in a tertiary referral center for dermatology between January 1, 2009, and December 31, 2015. Sixty-one patients with 63 ambiguous pigmented facial macules and 12 control photodamaged facial areas were included in the study. Melanocyte density in 1-mm basal layers was determined in skin biopsy specimens from all lesions stained with hematoxylin-eosin and immunohistochemical markers (melan-A, microphthalmia-associated transcription factor, and SRY-related HMG-box gene 10). Dermoscopic, RCM images, and histopathologic preparations were systematically evaluated for the presence of lentigo maligna (LM) criteria. Confocal evaluation was blinded to clinical and dermoscopic diagnosis. Sensitivity and specificity of RCM for LM diagnosis and κ value to establish correlations between dermoscopy, RCM, and histopathology were performed. Sensitivity and specificity of RCM for LM diagnosis. Of the 61 patients included in the study, 31 (51%) were women; mean (SD) age was 71.8 (13.1) years. Twenty-four of the 63 (38%) lesions were diagnosed as LM or LM melanoma (LMM) and 39 (62%) as benign pigmented lesions. Reflectance confocal microscopy enhanced the diagnosis of pigmented facial macules with 91.7% sensitivity and 86.8% specificity. Multivariate analysis showed 2 dermoscopic and 2 confocal features associated with LM or LMM: (1) asymmetric follicular pigmentation and targetlike structures, and (2) round, large pagetoid cells and follicular localization of atypical cells, respectively. Continuous proliferation of atypical melanocytes was found in 21 (88%) LM or

  2. Relationship Between Dual Time Point FDG PET and Immunohistochemical Parameters in Preoperative Colorectal Cancer: Preliminary Study

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Jai Hyuen; Lee, Won Ae; Park, Seok Gun; Park, Dong Kook; Namgung, Hwan [Dankook Univ. College of Medicine, Cheonan (Korea, Republic of)

    2012-03-15

    The clinical availability of 2 deoxy 2 [18F] fluoro D glucose (FDG) dual time point positron emission tomography/computerized tomography (DTPP) has been investigated in diverse oncologic fields. The aim of this preliminary study was to evaluate the relationship between various immunohistopathologic markers reflecting disease progression of colorectal cancer and parameters extracted from FDG DTPP in colorectal cancer patients. Forty seven patients with histologically confirmed colorectal cancer were analyzed in this preliminary study. FDG DTPP consisted of an early scan 1 h after FDG injection and a delayed scan 1.5 h after the early scan. Based on an analysis of FDG DTPP, we estimated the maximum standardized uptake value (SUV) of tumors on the early and delayed scans (SUV{sup earlya}nd SUV{sup delayed,} respectively). The retention index (RI) was calculated as follows: (SUV{sup delayed-} SUV{sup early)} x 100/ SUV{sup early.} The clinicopathological findings (size and T and N stages) and immunohistochemical factors [glucose transporter 1 (GLUT 1), hexokinase 2 (HK 2), p53, P504S, and {beta} catenin] were analyzed by visual analysis. The RIs calculated from the SUVs ranged from -1.8 to 73.4 (31.8{+-}15.5). The RIs were significantly higher in patients with high T stages (T3 and T4) than with low T stages (T1 and T2; P<0.05). Among the immunohistochemical analytic markers, GLUT 1 had the highest positive staining rate (93.6%) compared to other markers. Based on unvariable analysis, it was shown that the RI of high level GLUT 1 expression was significantly higher than low level GLUT 1 expression (p=0.01), and the RI of high level p53 expression (p=0.08). Multivariate analysis to investigate a link between RI and clinico pathologic parameters of colorectal carcinoma showed that GLUT 1, p53, and T staging were independently connected with increased RIs (p<0.05, total) using backward selection methods. There was no significant statistical relationship between SUV

  3. Myeloperoxidase staining in the diagnosis of aggressive periodontitis.

    Science.gov (United States)

    Singh, Sukhdeep; Acharya, Anirudh B; Kumar, S C Veerendra

    2011-04-01

    To evaluate neutrophil myeloperoxidase (MPO) staining procedure as a reliable, affordable and easily available diagnostic assay for aggressive periodontitis. Fifteen subjects were recruited in the study wherein five each were diagnosed as aggressive periodontitis and chronic periodontitis respectively, and five were periodontally healthy. Three millilitres (ml) of venous blood was collected using Vacutainers containing ethylene diamine tetra acetate (EDTA) and was subjected to MPO staining procedure. Histological picture was evaluated using a visual analogue scale (VAS). MPO stained specimen of all the patients showed positive MPO staining of the neutrophils. The intensity of the stain of MPO granules was more in aggressive periodontitis specimen as compared to the chronic periodontitis patient specimen and healthy subject specimen. The staining characteristics were comparable for chronic periodontitis patients and healthy subject. This study shows that there is a potential and probable place for MPO staining as an economical, relatively convenient and easily available assay in the diagnosis of aggressive periodontitis.

  4. Immunohistochemical expression of receptor tyrosine kinase PDGFR-α, c-Met, and EGFR in skull base chordoma.

    Science.gov (United States)

    Akhavan-Sigari, R; Abili, M; Gaab, M R; Rohde, V; Zafar, N; Emami, P; Ostertag, H

    2015-01-01

    Chordomas are rare, locally aggressive malignancies that often exhibit an insidious natural history and are difficult to eradicate. Surgery and radiotherapy are the treatment mainstays of chordoma, but the chance of local recurrence remains high. Reports of receptor tyrosine kinase (RTK) expression in chordoma suggest that these tumors may respond to kinase inhibitor therapy. Currently, there are no effective chemotherapeutic protocols for chordoma. A tissue microarray containing 74 tumor specimens from primary chordoma patients and 71 from their recurrent tumors for a total of 145 tumor specimens was immunohistochemically analyzed for expression of a number of proteins involved in signal transduction from RTKs. Platelet-derived growth factor receptor-α (PDGFR-α), epidermal growth factor receptor (EGFR), c-Met, and CD-34 were detected in 100, 92, 100, and 59% of cases, respectively. PDGFR-α and c-Met staining was of moderate to strong intensity in all cases. In contrast, total EGFR staining was variable; weak staining was detected in 10 cases. Our results contribute to the understanding of the expression of RTKs in skull base chordomas and support the development of targeted therapies that inhibit RTKs, which may have a synergistic effect for chemotherapy in patients. There were statistically significant correlations between the expression of PDGFR-α, c-Met, and EGFR and disease-free survival. The results nonetheless suggest that chordomas may respond to RTK inhibitors or modulators of other downstream signaling.

  5. Immunohistochemical analysis of cytokeratin expression in reactive eccrine syringofibroadenoma-like lesion: a comparative study with eccrine syringofibroadenoma.

    Science.gov (United States)

    Ohnishi, T; Watanabe, S; Nomura, K

    2000-04-01

    In addition to solitary eccrine syringofibroadenoma (ESFA), there is another type of ESFA which is associated with underlying dermatoses (reactive ESFA-like lesion). Five lesions in 4 patients of reactive ESFA-like lesion were analyzed by an immunohistochemical method using 13 kinds of anti-cytokeratin (CK) antibodies. Two cases of solitary ESFA were also studied by the same procedure for comparison. Suprabasal staining pattern of AE1 and MNF116, which stain CKs 6, 16 and 17, markers of hyperproliferative state, was observed diffusely in 5 lesions of reactive ESFA-like lesions except for focal negative staining in one case, and was observed focally in one case of solitary ESFA. Furthermore, differentiation-specific cytokeratin expression was reduced in 3 of 5 lesions of reactive ESFA-like lesions. Both ESFA and reactive ESFA showed basically similar immunoreactivity suggesting differentiation toward the dermal duct. The above slight difference in immunoreactivity between both lesions may be explained due to inflammatory infiltrates associated with underlying dermatoses.

  6. Refractile mycobacteria in Romanowsky-stained bone marrow smears. A comparison of acid-fast-stained tissue sections and Romanowsky-stained smears.

    Science.gov (United States)

    Torlakovic, E; Clayton, F; Ames, E D

    1992-03-01

    The appearance of mycobacteria was studied in Wright-stained bone marrow preparations of human immunodeficiency virus-infected patients and compared with acid-fast-stained trephine biopsy sections and culture results. Mycobacterium avium complex in Romanowsky-stained preparations may be seen as extracellular and intracellular clear or red refractile beaded rods and nonrefractile "negative images." Refractile mycobacteria were seen in 17 of 20 culture-positive cases. Acid-fast stain of the trephine biopsy demonstrated organisms in only 11 of the 20 cases. Thus, six cases were culture positive and contained refractile rods but had no acid-fast organisms on the trephine biopsy. No false-positive results were seen with Romanowsky stain; the three false-negative results for refractility also were negative with acid-fast stain. Examination of Romanowsky-stained smears or imprints for refractile mycobacteria provides a reliable and sensitive method to identify mycobacteria in this population. Romanowsky-stained bone marrow aspirate and imprint smears should be examined for refractile bacilli when mycobacterial infection is suspected.

  7. Activity and immunohistochemical localization of porphobilinogen deaminase in rat tissues

    DEFF Research Database (Denmark)

    Jørgensen, P E; Erlandsen, E J; Poulsen, Steen Seier

    2000-01-01

    in the liver, 14 pkat/g, and lowest in the jejunum, 0.7 pkat/g. The immunohistochemical localization of PBGD was studied by antibodies raised against a 40 amino acid synthetic peptide that corresponds to a segment in the C-terminal part of PBGD. The study demonstrated that the PBGD immunoreactivity...

  8. Immunohistochemically determined total epidermal growth factor receptor levels not of prognostic value in newly diagnosed glioblastoma multiforme: Report from the Radiation Therapy Oncology Group

    International Nuclear Information System (INIS)

    Chakravarti, Arnab; Seiferheld, Wendy; Tu Xiaoyu; Wang Huijun; Zhang Huazhong; Ang, K. Kian; Hammond, Elizabeth; Curran, Walter; Mehta, Minesh

    2005-01-01

    Purpose: The Radiation Therapy Oncology Group (RTOG) performed an analysis of patterns of immunohistochemically detected total epidermal growth factor receptor (EGFR) protein expression levels and their prognostic significance on archival tissue in newly diagnosed glioblastoma multiforme (GBM) patients from prior prospective RTOG clinical trials. Methods and materials: Patients in this study had been treated on previous RTOG GBM trials (RTOG 7401, 7918, 8302, 8409, 9006, 9305, 9602, and 9806). Tissue microarrays were prepared from 155 patients enrolled in these trials. These specimens were stained using a mouse monoclonal antibody specific for the extracellular binding domain of EGFR to detect total EGFR (including both wild-type phosphorylated and wild-type unphosphorylated isoforms with some cross-reactivity with EGFRvIII). The intensity of total EGFR protein expression was measured by computerized quantitative image analysis using the SAMBA 4000 Cell Image Analysis System. The parameters measured were the mean optical densities over the labeled areas and the staining index, which represents the proportion of stained area relative to the mean stain concentration. Both parameters were correlated with the clinical outcome. Results: No differences in either overall or progression-free survival could be demonstrated by the mean optical density class or mean optical density quartile or the staining index of total EGFR immunostaining among the representative RTOG GBM cases. Conclusion: Total EGFR protein expression levels, as measured immunohistochemically, do not appear to be of prognostic value in newly diagnosed GBM patients. Given the accumulating clinical evidence of the activity of anti-EGFR agents in GBM and the preclinical data suggesting the important role of downstream mediators as effectors of EGFR signaling, the RTOG is conducting additional investigations into the prognostic value of activation patterns of EGFR signaling, both at the level of the receptor

  9. Determination of Diagnostic Antigens in Cattle Amphistomiasis Using Western Blotting

    Directory of Open Access Journals (Sweden)

    A Halajian

    2009-05-01

    Full Text Available "nBackground: Mixed infection with amphistomes seems common in native cattle of Iran. The aim of this study was to determine diagnostic antigens in cattle mixed amphistomiasis."nMethods: Specific antigens of Cotylophoron cotylophorum, Gastrothylax crumenifer and Paramphisto­mum cervi (mixed infection, the most common species, were collected from cattle was deter­mined. Adult trematodes were collected from the rumen of naturally infected cattle at meat inspec­tion. After their homogenization and centrifugation, somatic antigens were prepared and ana­lyzed by SDS-PAGE. Specific antigens were determinated by western blot with homologous and heterolo­gous sera. SDS-PAGE of whole worms extract was performed at different concentrations and subse­quent gels staining. Immunoblotting analysis using sera from cattle naturally infected with am­phistomes, Dicrocoelium dendriticum, Fasciola spp. and hydatid cyst was performed."nResults: Electrophorese analysis of somatic antigens revealed the presence of 10 and 21 protein bands at 4 µgr/ml and 8 µgr/ml with molecular weights ranging from 25-120 and 25-150 kDa, respectively. The best result was taken at 8 mg/ml concentration. Although western blot of these proteins demon­strate 5 major antigenic polypeptides ranging from 50 to 100 kDa which were recognized by serum of cat­tle naturally infected with mixed amphistomes.

  10. Erbium doped stain etched porous silicon

    International Nuclear Information System (INIS)

    Gonzalez-Diaz, B.; Diaz-Herrera, B.; Guerrero-Lemus, R.; Mendez-Ramos, J.; Rodriguez, V.D.; Hernandez-Rodriguez, C.; Martinez-Duart, J.M.

    2008-01-01

    In this work a simple erbium doping process applied to stain etched porous silicon layers (PSLs) is proposed. This doping process has been developed for application in porous silicon solar cells, where conventional erbium doping processes are not affordable because of the high processing cost and technical difficulties. The PSLs were formed by immersion in a HF/HNO 3 solution to properly adjust the porosity and pore thickness to an optimal doping of the porous structure. After the formation of the porous structure, the PSLs were analyzed by means of nitrogen BET (Brunauer, Emmett and Teller) area measurements and scanning electron microscopy. Subsequently, the PSLs were immersed in a saturated erbium nitrate solution in order to cover the porous surface. Then, the samples were subjected to a thermal process to activate the Er 3+ ions. Different temperatures and annealing times were used in this process. The photoluminescence of the PSLs was evaluated before and after the doping processes and the composition was analyzed by Fourier transform IR spectroscopy

  11. Survival of Pseudomonas aeruginosa in modified Romanowsky staining solutions.

    Science.gov (United States)

    Duffield, Richard; Wong, Hui-San; Trott, Darren J; Hill, Peter B

    2015-08-01

    Anecdotal reports suggest that rapid staining solutions can become contaminated with micro-organisms, especially Pseudomonas aeruginosa. To determine whether inoculation of rapid Romanowsky-type stains with P. aeruginosa results in viable bacterial contamination, which could lead to cross-contamination of slides during cytological staining. Pseudomonas aeruginosa was inoculated into clean and organically contaminated staining solutions (fixative, eosin and methylene blue) and positive (broth) and negative (bleach) control solutions. Subsequent viability and survival were detected by measuring colony-forming units per millilitre at various time points up to 2 weeks. Each sample was stained and microscopically examined to determine whether bacteria were visible. No bacteria could be cultured at any time point from the bleach or fixative solution. In clean eosin and methylene blue staining solutions, viable bacteria were recovered for up to 1 h, but by 24 h all bacteria were dead. In staining solutions contaminated with hair and dead skin cells, bacteria survived in methylene blue for up to 1 h, and viable bacteria persisted in the eosin stain for 2 weeks. In solutions containing viable organisms, the bacteria could be observed by microscopic examination; no bacteria were visible when the solutions contained no viable organisms. Pseudomonas aeruginosa can survive in commonly used staining solutions for variable periods of time, but is unable to proliferate. Although theoretically this might complicate cytological interpretation and subsequent diagnosis, the likelihood of this in clinical practice appears remote when the correct staining technique is used. © 2015 ESVD and ACVD.

  12. Validation of anti-FXR1 antibodies in the canine species and application to an immunohistochemical study of canine oral melanomas

    Directory of Open Access Journals (Sweden)

    Laura Nordio

    2017-05-01

    Full Text Available FXR1 (Fragile X mental retardation-related protein 1 is a cytoplasmic RNA binding protein, which genetic expression has been related to metastatic potential in human melanoma. The aims of the present study were: the validation of two commercially available clones of polyclonal anti-human FXR1 antibody in dogs; their application to investigate FXR1 expression in a group of canine oral melanomas. Anti-FXR1 antibody was not previously validated in the canine species. Two different commercially available polyclonal anti-FXR1 antibodies (respectively made in goat and in rabbit were used. FXR1 protein in canine serum was identified by western blot after SDS-PAGE, using human serum as control. FXR1 immunohistochemical expression was tested in a series of normal tissues, that are expected to express FXR1, and in 31 cases of oral melanomas. The final immunohistochemical protocol used heat-induced unmasking and overnight incubation. FXR1 protein bands in canine serum were detected by tested antibodies, in a more specific way by the rabbit antibody. FXR1 immunohistochemical staining was positive in all tested organs, with different levels of expression. FXR1 was also expressed in 31/31 tested melanomas, with variable intensity and percentage of positive cells (Figure 1. Equal results were achieved with the two antibodies in 8 cases of melanoma, whereas there were variable differences in 22, and one case stained only with goat antibody. The rabbit antibody gave less background staining. This study validated anti-FXR1 antibodies for use in the canine species. This protein was expressed in various normal tissues, as well as in the tested neoplasms. Significance of different level of expression is undergoing evaluation with further studies.

  13. Immunohistochemical quantification of expression of a tight junction protein, claudin-7, in human lung cancer samples using digital image analysis method.

    Science.gov (United States)

    Lu, Zhe; Liu, Yi; Xu, Junfeng; Yin, Hongping; Yuan, Haiying; Gu, Jinjing; Chen, Yan-Hua; Shi, Liyun; Chen, Dan; Xie, Bin

    2018-03-01

    Tight junction proteins are correlated with cancer development. As the pivotal proteins in epithelial cells, altered expression and distribution of different claudins have been reported in a wide variety of human malignancies. We have previously reported that claudin-7 was strongly expressed in benign bronchial epithelial cells at the cell-cell junction while expression of claudin-7 was either altered with discontinued weak expression or completely absent in lung cancers. Based on these results, we continued working on the expression pattern of claudin-7 and its relationship with lung cancer development. We herein proposed a new Digital Image Classification, Fragmentation index, Morphological analysis (DICFM) method for differentiating the normal lung tissues and lung cancer tissues based on the claudin-7 immunohistochemical staining. Seventy-seven lung cancer samples were obtained from the Second Affiliated Hospital of Zhejiang University and claudin-7 immunohistochemical staining was performed. Based on C++ and Open Source Computer Vision Library (OpenCV, version 2.4.4), the DICFM processing module was developed. Intensity and fragmentation of claudin-7 expression, as well as the morphological parameters of nuclei were calculated. Evaluation of results was performed using Receiver Operator Characteristic (ROC) analysis. Agreement between these computational results and the results obtained by two pathologists was demonstrated. The intensity of claudin-7 expression was significantly decreased while the fragmentation was significantly increased in the lung cancer tissues compared to the normal lung tissues and the intensity was strongly positively associated with the differentiation of lung cancer cells. Moreover, the perimeters of the nuclei of lung cancer cells were significantly greater than that of the normal lung cells, while the parameters of area and circularity revealed no statistical significance. Taken together, our DICFM approach may be applied as an

  14. Direct comparison of enzyme histochemical and immunohistochemical methods to localize an enzyme

    NARCIS (Netherlands)

    van Noorden, Cornelis J. F.

    2002-01-01

    Immunohistochemical localization of enzymes is compared directly with localization of enzyme activity with (catalytic) enzyme histochemical methods. The two approaches demonstrate principally different aspects of an enzyme. The immunohistochemical method localizes the enzyme protein whether it is

  15. Immunohistochemical detection of 3 viral infections in paraffin-embedded tissue from mink (Mustela vison): a tissue-microarray-based study

    Science.gov (United States)

    Hammer, Anne Sofie; Dietz, Hans Henrik; Hamilton-Dutoit, Stephen

    2007-01-01

    Immunohistochemical (IHC) assays were developed and tested for the detection of 3 viral infections in archived paraffin-embedded mink tissue. Specimens had been obtained from mink with diagnoses of acute Aleutian disease (AD), mink parvoviral enteritis (MVE), or canine distemper (CD) made by means of routine diagnostic procedures. To improve the efficiency and reduce the costs of IHC analyses, tissue microarray (TMA) technology was used. Representative cores 2 mm in diameter from each tissue specimen and from positive- and negative-control specimens were collected in a TMA block. Immunohistochemical reactions to viral antigens were assessed and graded. Positive reactions were found in 91% of the 32 specimens from mink with AD, 53% to 80% of the 60 specimens from mink with MVE, and all 66 of the specimens from mink with CD. To validate the use of TMAs, the IHC methods were applied to whole-mount paraffin-embedded sections of 10 of the positive specimens for each disease, together with whole-mount sections of small intestine and lung tissue from 2 healthy mink. The IHC grading of the TMA cores and the whole-mount sections from the same animal corresponded completely. These results suggest that IHC demonstration of viral antigen allows rapid and reliable diagnosis of the 3 viral infections in mink and is a potential supplement to histologic diagnostic procedures. The TMA technique proved useful for screening large numbers of samples for expression of specific viral antigens, while reducing overall costs. PMID:17193876

  16. Evaluation of a panel of antibodies for the immunohistochemical identification of immune cells in paraffin-embedded lymphoid tissues of new- and old-world camelids.

    Science.gov (United States)

    Uhde, Ann-Kathrin; Lehmbecker, Annika; Baumgärtner, Wolfgang; Spitzbarth, Ingo

    2017-02-01

    Different species of camelids play an important role in the epidemiology of various emerging infectious diseases such as Middle East respiratory syndrome. For precise investigations of the immunopathogenesis in these host species, appropriate immunohistochemical markers are highly needed in order to phenotype distinct immune cells populations in camelids. So far, specific immunohistochemical markers for camelid immune cells are rarely commercially available, and cross-reactivity studies are restricted to the use of frozen dromedary tissues. To bridge this gap, 14 commercially available primary antibodies were tested for their suitability to demonstrate immune cell populations on formalin fixed paraffin-embedded (FFPE) tissue sections of dromedaries, Bactrian camels, llamas, and alpacas in the present study. Out of these, 9 antibodies directed against CD3, CD20, CD79α, HLA-DR, Iba-1, myeloid/histiocyte antigen, CD204, CD208, and CD68 antigen exhibited distinct immunoreaction patterns to certain camelid immune cell subsets. The distribution of these antigens was comparatively evaluated in different anatomical compartments of thymus, spleen, mesenteric, and tracheobronchial lymph nodes. The presented results will provide a basis for further investigations in camelids, especially with respect to the role of the immune response in certain infectious diseases, which harbor a considerable risk to spill over to other species. Copyright © 2017 Elsevier B.V. All rights reserved.

  17. Vascular targeted therapy with anti-prostate-specific membrane antigen monoclonal antibody J591 in advanced solid tumors.

    Science.gov (United States)

    Milowsky, Matthew I; Nanus, David M; Kostakoglu, Lale; Sheehan, Christine E; Vallabhajosula, Shankar; Goldsmith, Stanley J; Ross, Jeffrey S; Bander, Neil H

    2007-02-10

    Based on prostate-specific membrane antigen (PSMA) expression on the vasculature of solid tumors, we performed a phase I trial of antibody J591, targeting the extracellular domain of PSMA, in patients with advanced solid tumor malignancies. This was a proof-of-principle evaluation of PSMA as a potential neovascular target. The primary end points were targeting,toxicity, maximum-tolerated dose, pharmacokinetics (PK), and human antihuman antibody (HAHA) response. Patients had advanced solid tumors previously shown to express PSMA on the neovasculature. They received 111Indium (111ln)-J591 for scintigraphy and PK, followed 2 weeks later by J591 with a reduced amount of 111In for additional PK measurements. J591 dose levels were 5, 10, 20, 40, and 80 mg. The protocol was amended for six weekly administrations of unchelated J591. Patients with a response or stable disease were eligible for re-treatment. Immunohistochemistry assessed PSMA expression in tumor tissues. Twenty-seven patients received monoclonal antibody (mAb) J591. Treatment was well tolerated. Twenty (74%) of 27 patients had at least one area of known metastatic disease targeted by 111In-J591, with positive imaging seen in patients with kidney, bladder, lung, breast, colorectal, and pancreatic cancers, and melanoma. Seven of 10 patient specimens available for immunohistochemical assessment of PSMA expression in tumor-associated vasculature demonstrated PSMA staining. No HAHA response was seen. Three patients of 27 with stable disease received re-treatment. Acceptable toxicity and excellent targeting of known sites of metastases were demonstrated in patients with multiple solid tumor types, highlighting a potential role for the anti-PSMA antibody J591 as a vascular-targeting agent.

  18. The chicken erythrocyte-specific MHC antigen. Characterization and purification of the B-G antigen by monoclonal antibodies

    DEFF Research Database (Denmark)

    Salomonsen, J; Skjødt, K; Crone, M

    1987-01-01

    -labeled chicken erythrocyte membranes (CEM) followed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and autoradiography. The B-G antigen had an approximate molecular mass of 46-48 kd in reduced samples, depending on the haplotype, and in unreduced samples contained either dimers (85 kd......-G to be synthesized as a monomer, with dimerization taking place after 20-30 min. No change in the monomer's molecular mass due to posttranslational modifications was revealed. The antigen was purified from detergent extract of CEM by affinity chromatography with a monoclonal antibody, and then reduced and alkylated...... and affinity-purified once more. Finally, reverse-phase chromatography resulted in a pure product. The B-G antigen was identified in the various fractions by rocket immunoelectrophoresis. The final product was more than 99% pure, as estimated by SDS-PAGE analysis followed by silver stain of proteins. The yield...

  19. MAGE-A is More Highly Expressed Than NY-ESO-1 in a Systematic Immunohistochemical Analysis of 3668 Cases.

    Science.gov (United States)

    Kerkar, Sid P; Wang, Zeng-Feng; Lasota, Jerzy; Park, Tristen; Patel, Krishna; Groh, Eric; Rosenberg, Steven A; Miettinen, Markku M

    2016-05-01

    Two cancer testis antigens, the New York esophageal squamous cell carcinoma-1 (NY-ESO-1) and the melanoma-antigen family A (MAGE-A), represent promising immunotherapy targets due to the low expression of these antigens in nonmalignant tissue. To assess overexpression patterns in various cancers, we performed a systematic immunohistochemical analysis for NY-ESO-1 and MAGE-A on tissue array samples of 3668 common epithelial carcinomas (CA) and germ cell tumors of high prevalence and mortality. Here, we find significantly higher expression of MAGE-A (>50% on tumor cells) compared with NY-ESO-1 in several CAs including cutaneous squamous cell carcinomas (SCC) (52.8%/2.8%), esophageal SCC (50%/0%), head and neck SCC (41.1%/ESO-1, was seen in whole slide evaluations of an independent cohort of metastatic SCC (45.5%/3.6%) and metastatic CA (13.5%/0%) of various primaries with significantly higher expression of MAGE-A in metastatic SCC compared with other metastatic CA. MAGE-A is also more highly expressed in germ cell tumors, seminomas (69%/3.5%) and nonseminomas (40.1%/4.7%). In summary, MAGE-A is more highly expressed than NY-ESO-1 in a majority of human malignancies, and targeting MAGE-A may benefit a large number of patients.

  20. Harmonization of the intracellular cytokine staining assay.

    Science.gov (United States)

    Welters, Marij J P; Gouttefangeas, Cécile; Ramwadhdoebe, Tamara H; Letsch, Anne; Ottensmeier, Christian H; Britten, Cedrik M; van der Burg, Sjoerd H

    2012-07-01

    Active immunotherapy for cancer is an accepted treatment modality aiming to reinforce the T-cell response to cancer. T-cell reactivity is measured by various assays and used to guide the clinical development of immunotherapeutics. However, data obtained across different institutions may vary substantially making comparative conclusions difficult. The Cancer Immunotherapy Immunoguiding Program organizes proficiency panels to identify key parameters influencing the outcome of commonly used T-cell assays followed by harmonization. Our successes with IFNγ-ELISPOT and peptide HLA multimer analysis have led to the current study on intracellular cytokine staining (ICS). We report the results of three successive panels evaluating this assay. At the beginning, 3 out of 9 participants (33 %) were able to detect >6 out of 8 known virus-specific T-cell responses in peripheral blood of healthy individuals. This increased to 50 % of the laboratories in the second phase. The reported percentages of cytokine-producing T cells by the different laboratories were highly variable with coefficients of variation well over 60 %. Variability could partially be explained by protocol-related differences in background cytokine production leading to sub-optimal signal-to-noise ratios. The large number of protocol variables prohibited identification of prime guidelines to harmonize the assays. In addition, the gating strategy used to identify reactive T cells had a major impact on assay outcome. Subsequent harmonization of the gating strategy considerably reduced the variability within the group of participants. In conclusion, we propose that first basic guidelines should be applied for gating in ICS experiments before harmonizing assay protocol variables.

  1. Naturally acquired bovine besnoitiosis: histological and immunohistochemical findings in acute, subacute, and chronic disease.

    Science.gov (United States)

    Langenmayer, M C; Gollnick, N S; Majzoub-Altweck, M; Scharr, J C; Schares, G; Hermanns, W

    2015-05-01

    The pathogenesis of bovine besnoitiosis, a disease of increasing concern within Europe, is still incompletely understood. In this study, disease progression after natural infection with the causative apicomplexan Besnoitia besnoiti was monitored in histological skin sections of 5 individual female cattle over time. High-frequency skin sampling of 2 cattle with mild and 2 with severe acute, subacute, and chronic besnoitiosis, as well as from 1 animal during subclinical disease, enabled documentation from the beginning of the disease. Skin sections were stained with hematoxylin and eosin and Giemsa, periodic acid-Schiff reaction, and anti-Besnoitia immunohistochemistry. In all 4 clinically affected animals, tachyzoite-like endozoites could be detected for the first time by immunohistochemistry, and tissue cyst evolution was monitored. Besnoitiosis-associated lesions were not detected in the animal showing the subclinical course. Because of the inconsistency of the nomenclature of Besnoitia tissue cyst layers in the literature, a new nomenclature for B. besnoiti cyst wall layers is proposed: tissue cysts consist of a hypertrophied host cell with enlarged nuclei, an intracytoplasmic parasitophorous vacuole with bradyzoites, a sometimes vacuolated inner cyst wall, and an outer cyst wall in more developed cysts. Inner and outer cyst walls can be readily distinguished by using special stains. In 1 animal, extracystic B. besnoiti zoites were immunohistochemically detected during the chronic stage. At necropsy, the 2 severely affected cows displayed large numbers of B. besnoiti cysts in a variety of tissues, including the corium of the claws, contributing mainly to the development of chronic laminitis in these 2 cases. © The Author(s) 2014.

  2. A monkey antigen crossreacting with carcinoembryonic antigen, CEA.

    Science.gov (United States)

    Engvall, E.; Vuento, M.; Ruoslahti, E.

    1976-01-01

    Normal monkey tissues were found to contain an antigen which crossreacts immunologically with the carcinoembryonic antigen (CEA) of the human digestive tract. The monkey antigen reacted with complete or partial identity to the normal crossreacting antigen (NCA) in humans when tested in immunodiffusion against anti-CEA or anti-NCA. Extracts of monkey tissues inhibited in radioimmunoassays measuring human NCA. It is possible that monkey foetuses and colonic tumours contain CEA. Images Fig. 1 PMID:823952

  3. A useful single-solution polychrome stain for plant material...Brook Cyte-Chrome I.

    Science.gov (United States)

    Stanley L Krugman; Julia F. Littlefield

    1968-01-01

    Fresh and chemically fixed sectioned plant material can be quickly stained by applying a Brook Cyte Chrome I polychrome stain. Staining time averaged only about 10 minutes. And exact timing of staining and de-staining is not as critical as with most of the commonly used stains. The overall quality is comparable to that of the traditional stains.

  4. Antigen smuggling in tuberculosis.

    Science.gov (United States)

    Hudrisier, Denis; Neyrolles, Olivier

    2014-06-11

    The importance of CD4 T lymphocytes in immunity to M. tuberculosis is well established; however, how dendritic cells activate T cells in vivo remains obscure. In this issue of Cell Host & Microbe, Srivastava and Ernst (2014) report a mechanism of antigen transfer for efficient activation of antimycobacterial T cells. Copyright © 2014 Elsevier Inc. All rights reserved.

  5. CD antigens 2001

    Czech Academy of Sciences Publication Activity Database

    Mason, D.; Andre, P.; Bensussan, A.; Buckley, C.; Civin, C.; Clark, E.; de Haas, M.; Goyert, S.; Hadam, M.; Hart, D.; Hořejší, Václav; Meuer, S.; Morrissey, J.; Schwartz-Albiez, R.; Shaw, S.; Simmons, D.; Uguccioni, M.; van der Schoot, E.; Vivier, E.; Zola, H.

    2001-01-01

    Roč. 58, č. 6 (2001), s. 425-430 ISSN 0001-2815. [Conference on Human leucocyte differentiation antigens /7./. Harrogate, 20.06.2000-25.06.2000] Institutional research plan: CEZ:AV0Z5052915 Keywords : CD molecules, HLDA Subject RIV: EC - Immunology Impact factor: 2.864, year: 2001

  6. CD antigens 2002

    Czech Academy of Sciences Publication Activity Database

    Mason, D.; Andre, P.; Bensussan, A.; Buckley, C.; Civin, C.; Clark, E.; de Haas, M.; Goyert, S.; Hadam, M.; Hart, D.; Hořejší, Václav; Meuer, S.; Morrissey, J.; Schwartz-Albiez, R.; Shaw, S.; Simmons, D.; Uguccioni, M.; van der Schoot, E.; Vivier, E.; Zola, H.

    2002-01-01

    Roč. 99, č. 10 (2002), s. 3877-3880 ISSN 0006-4971. [Conference on Human leucocyte differentiation antigens /7./. Harrogate, 20.06.2000-25.06.2000] Institutional research plan: CEZ:AV0Z5052915 Keywords : CD molecules, HLDA Subject RIV: EC - Immunology Impact factor: 9.631, year: 2002

  7. CD antigens 2001

    Czech Academy of Sciences Publication Activity Database

    Mason, D.; Andre, P.; Bensussan, A.; Buckley, C.; Civin, C.; Clark, E.; de Haas, M.; Goyert, S.; Hadam, M.; Hart, D.; Hořejší, Václav; Meuer, S.; Morrissey, J.; Schwartz-Albiez, R.; Shaw, S.; Simmons, D.; Uguccioni, M.; van der Schoot, E.; Vivier, E.; Zola, H.

    2002-01-01

    Roč. 168, č. 5 (2002), s. 2083-2086 ISSN 0022-1767. [Conference on Human leucocyte differentiation antigens /7./. Harrogate, 20.06.2000-25.06.2000] Institutional research plan: CEZ:AV0Z5052915 Keywords : CD molecules, HLDA Subject RIV: EC - Immunology Impact factor: 7.014, year: 2002

  8. CD antigens 2001

    Czech Academy of Sciences Publication Activity Database

    Mason, D.; Andre, P.; Bensussan, A.; Buckley, C.; Civin, C.; Clark, E.; de Haas, M.; Goyert, S.; Hadam, M.; Hart, D.; Hořejší, Václav; Meuer, S.; Morrissey, J.; Schwartz-Albiez, R.; Shaw, S.; Simmons, D.; Uguccioni, M.; van der Schoot, E.; Vivier, E.; Zola, H.

    2001-01-01

    Roč. 103, č. 4 (2001), s. 401-406 ISSN 0019-2805 R&D Projects: GA ČR GA310/99/0349 Institutional research plan: CEZ:AV0Z5052915 Keywords : antigen * CD * leukocyte Subject RIV: EB - Genetics ; Molecular Biology Impact factor: 2.656, year: 2001

  9. CD antigens 2001

    Czech Academy of Sciences Publication Activity Database

    Mason, D.; Andre, P.; Bensussan, A.; Buckley, C.; Civin, C.; Clark, E.; de Haas, M.; Goyert, S.; Hadam, M.; Hart, D.; Hořejší, Václav; Meuer, S.; Morrissey, J.; Schwartz-Albiez, R.; Shaw, S.; Simmons, D.; Uguccioni, M.; van der Schoot, E.; Vivier, E.; Zola, H.

    2001-01-01

    Roč. 19, č. 6 (2001), s. 556-562 ISSN 1066-5099 R&D Projects: GA AV ČR IAA7052904 Institutional research plan: CEZ:AV0Z5052915 Keywords : CD * leukocyte antigens Subject RIV: EB - Genetics ; Molecular Biology Impact factor: 2.689, year: 2001

  10. CD antigens 2001

    Czech Academy of Sciences Publication Activity Database

    Mason, D.; Andre, P.; Bensussan, A.; Buckley, C.; Civin, C.; Clark, E.; de Haas, M.; Goyert, S.; Hadam, M.; Hart, D.; Hořejší, Václav; Meuer, S.; Morrissey, J.; Schwartz-Albiez, R.; Shaw, S.; Simmons, D.; Uguccioni, M.; van der Schoot, E.; Vivier, E.; Zola, H.

    2001-01-01

    Roč. 31, č. 10 (2001), s. 2841-2847 ISSN 0014-2980 R&D Projects: GA AV ČR IAA7052904 Keywords : CD * leukocyte antigens Subject RIV: EB - Genetics ; Molecular Biology Impact factor: 4.990, year: 2001

  11. CD antigens 2001

    Czech Academy of Sciences Publication Activity Database

    Mason, D.; Andre, P.; Bensussan, A.; Buckley, C.; Civin, C.; Clark, E.; de Haas, M.; Goyert, S.; Hadam, M.; Hart, D.; Hořejší, Václav; Meuer, S.; Morrissey, J.; Schwartz-Albiez, R.; Shaw, S.; Simmons, D.; Uguccioni, M.; van der Schoot, E.; Vivier, E.; Zola, H.

    2001-01-01

    Roč. 211, č. 2 (2001), s. 81-85 ISSN 0008-8749 R&D Projects: GA ČR GA310/99/0349 Institutional research plan: CEZ:AV0Z5052915 Keywords : antigen * CD * leukocyte Subject RIV: EB - Genetics ; Molecular Biology Impact factor: 2.604, year: 2001

  12. CD antigens 2001

    Czech Academy of Sciences Publication Activity Database

    Mason, D.; Andre, P.; Bensussan, A.; Buckley, C.; Civin, C.; Clark, E.; de Haas, M.; Goyert, S.; Hadam, M.; Hart, D.; Hořejší, Václav; Meuer, S.; Morrissey, J.; Schwartz-Albiez, R.; Shaw, S.; Simmons, D.; Uguccioni, M.; van der Schoot, E.; Vivier, E.; Zola, H.

    2002-01-01

    Roč. 15, č. 1 (2002), s. 71-76 ISSN 0893-3952. [Conference on Human leucocyte differentiation antigens /7./. Harrogate, 20.06.2000-25.06.2000] Institutional research plan: CEZ:AV0Z5052915 Keywords : CD molecules, HLDA Subject RIV: EC - Immunology Impact factor: 3.821, year: 2002

  13. CD antigens 2001

    Czech Academy of Sciences Publication Activity Database

    Mason, D.; Andre, P.; Bensussan, A.; Buckley, C.; Civin, C.; Clark, E.; de Haas, M.; Goyert, S.; Hadam, M.; Hart, D.; Hořejší, Václav; Meuer, S.; Morrissey, J.; Schwartz-Albiez, R.; Shaw, S.; Simmons, D.; Uguccioni, M.; van der Schoot, E.; Vivier, E.; Zola, H.

    2001-01-01

    Roč. 70, č. 5 (2001), s. 685-690 ISSN 0741-5400 R&D Projects: GA AV ČR IAA7052904 Institutional research plan: CEZ:AV0Z5052915 Keywords : CD * leukocyte antigens Subject RIV: EB - Genetics ; Molecular Biology Impact factor: 4.516, year: 2001

  14. CD antigens 2001

    Czech Academy of Sciences Publication Activity Database

    Mason, D.; Andre, P.; Bensussan, A.; Buckley, C.; Civin, C.; Clark, E.; de Haas, M.; Goyert, S.; Hadam, M.; Hart, D.; Hořejší, Václav; Meuer, S.; Morrissey, J.; Schwartz-Albiez, R.; Shaw, S.; Simmons, D.; Uguccioni, M.; van der Schoot, E.; Vivier, E.; Zola, H.

    2001-01-01

    Roč. 13, č. 9 (2001), s. 1095-1098 ISSN 0953-8178 R&D Projects: GA ČR GA310/99/0349 Institutional research plan: CEZ:AV0Z5052915 Keywords : antigen * CD * leukocyte Subject RIV: EB - Genetics ; Molecular Biology Impact factor: 3.611, year: 2001

  15. β-endorphin antigen

    International Nuclear Information System (INIS)

    1981-01-01

    This invention relates to the production of antigens comprising β-endorphin, βsub(h)-endorphin, or βsub(c)-endorphin, in covalent conjugation with human gammaglobulin as immunogenic carrier material, and an antibody having the property of specifically binding β-endorphin or fragments thereof, containing the (6-15) residue sequence. (U.K.)

  16. Hoffman's violet and dahlia as specific stains for animal chromosomes.

    Science.gov (United States)

    Dutt, M K

    1979-03-01

    The paper deals with staining of the chromosomes of animal testicular materials with two basic dyes, Hoffman's violet and dahlia of the triphenylmethane group, following iodine-dye procedure. The important finding, as presented herein, is that iodinated alcohol after staining can be substituted with various acids, both organic as well as inorganic, all of which act as trapping agent preventing leaching of the dye that binds with the chromosomal DNA. It is clear from this study that RNA is not involved by this process of staining, since treatment of stained sections with cold phosphoric acid at 5 degrees C for 20--25 min and then stained also reveals perfect colouration of the chromosomes without any cytoplasmic staining. The in vitro absorption properties of Hoffman's violet have also been presented herein. The probable mechanism of action of these dyes has been suggested.

  17. Efficacy test of a toothpaste in reducing extrinsic dental stain

    Science.gov (United States)

    Agustanti, A.; Ramadhani, S. A.; Adiatman, M.; Rahardjo, A.; Callea, M.; Yavuz, I.; Maharani, D. A.

    2017-08-01

    This clinical trial compared the external dental stain reduction achieved by tested toothpaste versus placebo in adult patients. In this double-blind, parallel, randomised clinical trial, 45 female volunteers with a mean age of 20 years old were included. All study subjects front teeth were topically applicated with Silver Diamine Fluoride (SDF) to create external dental stains. Subjects were randomized into test (n=22) and control (n=23) groups. Toothpastes were used for two days to analyse the effects of removing external stains on the labial surfaces of all anterior teeth. VITA Easyshade Advance 4.0 was used to measure dental extrinsic stains changes. The analysis showed statistically significant efficacy of the tested toothpaste in reducing external dental stain caused by SDF, comparing to the placebo toothpaste, after one and two days of usage. The tested toothpaste was effective in reducing dental stain.

  18. Techniques for controlling variability in gram staining of obligate anaerobes.

    Science.gov (United States)

    Johnson, M J; Thatcher, E; Cox, M E

    1995-01-01

    Identification of anaerobes recovered from clinical samples is complicated by the fact that certain gram-positive anaerobes routinely stain gram negative; Peptostreptococcus asaccharolyticus, Eubacterium plautii, Clostridium ramosum, Clostridium symbiosum, and Clostridium clostridiiforme are among the nonconformists with regard to conventional Gram-staining procedures. Accurate Gram staining of American Type Culture Collection strains of these anaerobic bacteria is possible by implementing fixing and staining techniques within a gloveless anaerobic chamber. Under anaerobic conditions, gram-positive staining occurred in all test organisms with "quick" fixing techniques with both absolute methanol and formalin. The results support the hypothesis that, when anaerobic bacteria are exposed to oxygen, a breakdown of the physical integrity of the cell wall occurs, introducing Gram stain variability in gram-positive anaerobes. PMID:7538512

  19. Factors influencing extract of Hibiscus sabdariffa staining of rat testes.

    Science.gov (United States)

    Bassey, R B; Bakare, A A; Peter, A I; Oremosu, A A; Osinubi, A A

    2012-08-01

    Some plant extracts can be used in biology and medicine to reveal or identify cellular components and tissues. We investigated the effects of time and concentration on staining of histological sections of rat testes by an acidified extract of Hibiscus sabdariffa. An ethanolic extract of H. sabdariffa was diluted using 1% acetic acid in 70% ethanol to stain histological sections of testes at concentrations of 0.2, 0.1 and 0.05 g/ml for 5, 10, 15, 30, 45 and 60 min. The sections of testes were stained deep red. The staining efficiency of H. sabdariffa was greater at a high concentration and required less time to achieve optimal staining. H. sabdariffa is a strongly basic dye that can be used for various diagnostic purposes. Staining time and concentration must be considered to achieve optimal results.

  20. Diagnosing periprosthetic infection: false-positive intraoperative Gram stains.

    Science.gov (United States)

    Oethinger, Margret; Warner, Debra K; Schindler, Susan A; Kobayashi, Hideo; Bauer, Thomas W

    2011-04-01

    Intraoperative Gram stains have a reported low sensitivity but high specificity when used to help diagnose periprosthetic infections. In early 2008, we recognized an unexpectedly high frequency of apparent false-positive Gram stains from revision arthroplasties. The purpose of this report is to describe the cause of these false-positive test results. We calculated the sensitivity and specificity of all intraoperative Gram stains submitted from revision arthroplasty cases during a 3-month interval using microbiologic cultures of the same samples as the gold standard. Methods of specimen harvesting, handling, transport, distribution, specimen processing including tissue grinding/macerating, Gram staining, and interpretation were studied. After a test modification, results of specimens were prospectively collected for a second 3-month interval, and the sensitivity and specificity of intraoperative Gram stains were calculated. The retrospective review of 269 Gram stains submitted from revision arthroplasties indicated historic sensitivity and specificity values of 23% and 92%, respectively. Systematic analysis of all steps of the procedure identified Gram-stained but nonviable bacteria in commercial broth reagents used as diluents for maceration of periprosthetic membranes before Gram staining and culture. Polymerase chain reaction and sequencing showed mixed bacterial DNA. Evaluation of 390 specimens after initiating standardized Millipore filtering of diluent fluid revealed a reduced number of positive Gram stains, yielding 9% sensitivity and 99% specificity. Clusters of false-positive Gram stains have been reported in other clinical conditions. They are apparently rare related to diagnosing periprosthetic infections but have severe consequences if used to guide treatment. Even occasional false-positive Gram stains should prompt review of laboratory methods. Our observations implicate dead bacteria in microbiologic reagents as potential sources of false-positive Gram

  1. TREATMENTS TO MINIMIZE EXTRACTIVES STAIN IN WESTERN RED CEDAR

    OpenAIRE

    Rod Stirling,; Paul I. Morris

    2012-01-01

    Under certain conditions involving uneven exposure to weather, stains related to the extractives can reduce the aesthetic appeal of western red cedar in exterior applications such as fence boards, siding, and sidewall shingles. Selected chemical treatments were evaluated for their ability to inhibit the formation of extractives stain. DDACarbonate, alkyl amine oxide, and combinations thereof delayed extractives stain formation in an accelerated field test, with higher loadings having greater ...

  2. Near-UV laser treatment of extrinsic dental enamel stains.

    Science.gov (United States)

    Schoenly, J E; Seka, W; Featherstone, J D B; Rechmann, P

    2012-04-01

    The selective ablation of extrinsic dental enamel stains using a 400-nm laser is evaluated at several fluences for completely removing stains with minimal damage to the underlying enamel. A frequency-doubled Ti:sapphire laser (400-nm wavelength, 60-nanosecond pulse duration, 10-Hz repetition rate) was used to treat 10 extracted human teeth with extrinsic enamel staining. Each tooth was irradiated perpendicular to the surface in a back-and-forth motion over a 1-mm length using an ∼300-µm-diam 10th-order super-Gaussian beam with fluences ranging from 0.8 to 6.4 J/cm(2) . Laser triangulation determined stain depth and volume removed by measuring 3D surface images before and after irradiation. Scanning electron microscopy evaluated the surface roughness of enamel following stain removal. Fluorescence spectroscopy measured spectra of unbleached and photobleached stains in the spectral range of 600-800 nm. Extrinsic enamel stains are removed with laser fluences between 0.8 and 6.4 J/cm(2) . Stains removed on sound enamel leave behind a smooth enamel surface. Stain removal in areas with signs of earlier cariogenic acid attacks resulted in isolated and randomly located laser-induced, 50-µm-diam enamel pits. These pits contain 0.5-µm diam, smooth craters indicative of heat transfer from the stain to the enamel and subsequent melting and water droplet ejection. Ablation stalling of enamel stains is typically observed at low fluences (<3 J/cm(2) ) and is accompanied by a drastic reduction in porphyrin fluorescence from the Soret band. Laser ablation of extrinsic enamel stains at 400 nm is observed to be most efficient above 3 J/cm(2) with minimal damage to the underlying enamel. Unsound underlying enamel is also observed to be selectively removed after irradiation. Copyright © 2012 Wiley Periodicals, Inc.

  3. Studies on the blue-staining fungi of pine wood

    Directory of Open Access Journals (Sweden)

    A. Strzelczyk

    2014-11-01

    Full Text Available The aim of this was were to examine associations of bule-staining fungi which occur on pine wood to determine the interactions between fungi and to check the suscebility of these fungi to commonly used fungieides. The stron antagonism of members of the Trichoderma genus against the blue-staining fungi was demonstrated, Members of genera Pullularia, Hormiscium and Hormodendrum were strongy inhibited by stains of Trichoderma Ophiostoma strains were less susceptible to inhibition by this antagonist.

  4. Periostin in the Cancer Stroma of Mycosis Fungoides Palmaris et Plantaris: A Case Report and Immunohistochemical Study

    Directory of Open Access Journals (Sweden)

    Kayo Tanita

    2016-02-01

    Full Text Available Mycosis fungoides palmaris et plantaris (MFPP is a rare variant of mycosis fungoides limited to the palms and soles. Although little is known about the pathogenesis of MFPP, this variant of mycosis fungoides presents a relatively good prognosis. In this report, we describe an 85-year-old Japanese man with MFPP. Immunohistochemical staining revealed the dense deposition of periostin in the cancer stroma, as well as infiltration of CD163+CD206- tumor-associated macrophages (TAMs, which suggested the phenotypes of TAMs were not polarized to the M2 phenotype in the lesional skin of MFPP. Our present case might suggest one of the possible reasons for the good prognosis of MFPP.

  5. A quantitative immunohistochemical study on the time-dependent course of acute inflammatory cellular response to human brain injury.

    Science.gov (United States)

    Hausmann, R; Kaiser, A; Lang, C; Bohnert, M; Betz, P

    1999-01-01

    The time-dependent inflammatory cell reaction in human cortical contusions has been investigated during the first 30 weeks after blunt head injury. Immunohistochemical staining was carried out using CD 15 for granulocytes and LCA, CD 3 and UCHL-1 for mononuclear leucocytes. In order to provide reliable data for a forensic wound age estimation, the intensity of the cellular reaction was evaluated with a quantitative image analysis system. CD 15-labelled granulocytes were detectable earliest 10 min after brain injury, whereas significantly increased numbers of mononuclear leucocytes occurred in cortical contusions after a postinfliction interval of at least 1.1 days (LCA), 2 days (CD 3) or 3.7 days (UCHL-1), respectively.

  6. Alpha-defensin expression in the gastric tissue of children with Helicobacter pylori-associated chronic gastritis: an immunohistochemical study.

    Science.gov (United States)

    Soylu, Ozlem Bekem; Ozturk, Yesim; Ozer, Erdener

    2008-04-01

    In this study, we evaluated the expression of alpha-defensin and its correlation with histological criteria in children with and without Helicobacter pylori-associated gastritis. Forty-five children were included. Immunohistochemical staining was performed and the relationship between alpha-defensin immunoscoring and H. pylori status and histological criteria was evaluated. Expression of alpha-defensin was significantly higher in the H. pylori-positive group (P < 0.001) and it was significantly associated with higher grades of chronic inflammation and neutrophil density (P < 0.001 for both). Our data show that alpha-defensin expression is increased in H. pylori infection in childhood and is associated with inflammatory tissue damage.

  7. Role of human papilloma virus-16 in the pathogenesis of oral lichen planus--an immunohistochemical study.

    Science.gov (United States)

    Pol, Chetan A; Ghige, Suvarna K; Gosavi, Suchitra R

    2015-02-01

    Oral lichen planus (OLP) is a common chronic inflammatory immune-mediated disease with an aetiopathogenesis associated with cell-mediated immunological dysfunction. It is possible that oral mucosal viral infections, including human papilloma virus-16 (HPV-16) infection, may have a causative role in OLP pathogenesis. To assess the prevalence of HPV-16 in histopathologically diagnosed specimens of OLP and to evaluate whether any clinical features (such as the localisation of specimens) or the age or gender of patients, are correlated with the presence of this virus. This study was conducted on 30 specimens with a histopathological diagnosis of OLP, using the immunohistochemical marker HPV-16. Thirty normal oral mucosa specimens were also included as controls. Brown nuclear staining was accepted as positive for the HPV-16 antibody. The results were analysed using Fisher's exact test. P valuesvirus. © 2014 FDI World Dental Federation.

  8. [Histochemical stains for minerals by hematoxylin-lake method].

    Science.gov (United States)

    Miyagawa, Makoto

    2013-04-01

    The present study was undertaken to establish the experimental animal model by histological staining methods for minerals. After intraperitoneal injections of minerals, precipitates deposited on the surface of the liver. Liver tissues were fixed in paraformaldehyde, embedded in paraffin and cut into thin sections which were used as minerals containing standard section. Several reagents for histological stains and spectrophotometry for minerals were applied in both test-tube experiments and stainings of tissue sections to test for minerals. Hematoxylin-lake was found of capable of staining minerals in tissue. A simple technique used was described for light microscopic detection of minerals.

  9. Histopathological evaluation of ocular microsporidiosis by different stains

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    Sharma Savitri

    2006-06-01

    Full Text Available Abstract Background There is limited data on comparing stains in the detection of microsporidia in corneal biopsies. Hence we wanted to evaluate various stains for their ability to detect microsporidia in corneal tissue sections. Methods Four cases diagnosed with microsporidiosis on Hematoxylin and Eosin and Periodic Acid Schiff's stained sections of the corneal button between January 2002 and December 2004, were included. Further sections were prospectively stained with calcofluor white, Gram, Giemsa, Masson's trichrome, acridine orange, Gomori's methenamine silver, Gram's chromotrope and modified acid fast stain. The stained sections were analyzed for the spore characteristics in terms of size, shape, color contrast, cell wall morphology, waist band in cytoplasm and ease of detection. Results All sections showed microsporidial spores as 3 – 5 μm, oval bodies. 1% acid fast, Gram's chromotrope and GMS stains provided a reliable diagnosis of microsporidia as diagnostic waist band could be identified and good contrast helped distinguish the spores from inflammatory debris. Conclusion Considering the ease of performance, cost effectiveness and rapidity of the technique, 1% acid fast stain and Gram's chromotrope stain are ideal for the detection of microsporidia.

  10. Reliability of a rapid hematology stain for sputum cytology

    OpenAIRE

    Gonçalves, Jéssica; Pizzichini, Emilio; Pizzichini, Marcia Margaret Menezes; Steidle, Leila John Marques; Rocha, Cristiane Cinara; Ferreira, Samira Cardoso; Zimmermann, Célia Tânia

    2014-01-01

    Objective: To determine the reliability of a rapid hematology stain for the cytological analysis of induced sputum samples. Methods: This was a cross-sectional study comparing the standard technique (May-Grünwald-Giemsa stain) with a rapid hematology stain (Diff-Quik). Of the 50 subjects included in the study, 21 had asthma, 19 had COPD, and 10 were healthy (controls). From the induced sputum samples collected, we prepared four slides: two were stained with May-Grünwald-Giemsa, and two w...

  11. Black stain and dental caries in Filipino schoolchildren.

    Science.gov (United States)

    Heinrich-Weltzien, Roswitha; Monse, Bella; van Palenstein Helderman, Wim

    2009-04-01

    Black stain is defined as dark pigmented exogenous substance in lines or dots parallel to the gingival margin and firmly adherent to the enamel at the cervical third of the tooth crowns in the primary and permanent dentition. This study was conducted to assess the prevalence of black stain on teeth of Filipino children and to determine a possible association between black stain and caries levels. The study was designed to test the following hypotheses: (i) the prevalence of black stain does not differ between children from schools with oral health intervention programs and those from schools without an intervention program, (ii) the prevalence of black stain does not differ in children attending easily accessible and remote schools, (iii) caries prevalence and caries experience do not differ in children with and without black stain and (iv) the caries distribution at the surface level does not differ in children with and without black stain. In total, 32 elementary schools were included. 19 schools with a comprehensive school-based preventive oral health program, seven schools with a basic preventive program and six control schools. All sixth graders of these schools (n=1748) aged 11.7+/-1.1 years were clinically examined for black stain. DMFT was assessed in 1121 children by seven calibrated dentists using WHO criteria. DMFS was scored in 627 children by two calibrated dentists. Black stain was found in 16% of this population. The prevalence of black stain did not differ significantly between children attending schools with different oral health intervention programs. Thus, hypothesis 1 was accepted. The prevalence of black stain was significantly higher (Pcaries prevalence and caries experience than children without black stain. Thus, hypothesis 3 was rejected. No difference was found in the DMFS pattern of occlusal, smooth and proximal surfaces between children with and without black stain. Thus hypothesis 4 was accepted. The presence of black stain is

  12. Immunohistochemical her-2/ neu expression with gene amplification by fluorescence in situ hybridization for assessment in breast carcinomas

    International Nuclear Information System (INIS)

    Moatter, T.; Zahida, Z.U.D.; Kayani, N.; Pervez, S.

    2007-01-01

    To compare gene amplification of HER-2/neu gene by fluorescence in situ hybridization (FISH) in moderate to strong immunohistochemically (IHS) positive HER-2/neu cases of invasive breast carcinomas. Forty one (41) diagnosed cases of invasive breast carcinomas were included in this study in which already determined immunohistochemical HER-2/neu expression was scored as either 2+ or 3+, based on the intensity of membranous staining. These cases were further evaluated for gene amplification by FISH. For gene amplification, a ratio of HER-2/CEP z 2 was accepted as positive gene amplification. Out of a total 41 cases, which were scored as 2+ and 3+ by IHC, 14 cases (34.1%, 95% confidence interval: 19% - 49.3% ) showed gene amplification by FISH. Proportion of FISH positivity in IHC 2+ cases alone was found to be 25% (95% confidence interval: 10.5% - 41%). In contrast, a majority of IHC 3+ cases (5 of 6) were positive by FISH studies. IHC is appropriate for initial HER-2/neu assessment and patients with tumors scored as 3+ may be treated alone based on this information provided strict quality control and 95% concordance with FISH assays; however, patients with tumors interpreted as 2+, would benefit from gene amplification by FISH studies for more accurate assessment to avoid inaccurate prognostication and treatment. (author)

  13. Immunohistochemical detection of fibronectin in human thymus-comparison between groups of different ages

    International Nuclear Information System (INIS)

    Ali, S.; Minhas, L.A.; Arshad, M.; Hameed, W.

    2009-01-01

    To compare distribution of fibronectin content in various parts of human thymus between groups of different ages using immunohistochemistry. Comparative study. Forty specimens from tissue sections of human thymus were separated into two groups with 20 specimens in each group: Group A consisted of specimens from the patients of 1-25 years and Group B of specimens from patients beyond 40 years. These specimens were fixed in 10% formalin solution and processed for paraffin embedding. Five micron thick sections were made. Immunohistochemical staining was utilized to localize fibronectin in various regions of human thymus (capsule, connective tissue between lobules, cortex, medulla and areas around blood vessels). Statistically highly significant difference was found between two groups with a marked increase in the distribution of fibronectin content of the thymic capsule, the connective tissue between the lobules, areas around the blood vessels, and the medulla and cortex of the thymus in Group B compared to Group A. The fibronectin content in human thymus in its various regions shows a marked increase in aged people as compared to younger ones. (author)

  14. Ovarian Brenner tumors and Walthard nests: a histologic and immunohistochemical study.

    Science.gov (United States)

    Roma, Andres A; Masand, Ramya P

    2014-12-01

    Brenner tumors are composed of urothelial/transitional-type epithelium and, hence, are morphologically similar to Walthard nests and tubal/mesothelial transitional metaplasia. In this study, we analyzed immunohistochemical markers on Brenner tumors to explore Müllerian as well as Wolffian and germ cell derivation. We also attempted to explore their possible association with tubal/paratubal Walthard nests/transitional metaplasia, using the same immunostains. Thirty-two consecutive cases of Brenner tumors were identified. Thirteen (43%) of the patients had Walthard nests in the tubal/periovarian soft tissue. All Brenner tumors were diffusely positive for GATA3 (strongly positive in 30/32 and weakly positive in the remaining 2) and negative for PAX8, PAX2, and SALL4. Similarly, all Walthard nests were positive for GATA3, whereas only 3 (23%) of 13 showed occasional PAX8 expression; all were negative for PAX2 and SALL4. In our study, more than 40% of Brenner tumors had associated Walthard nests. The similar morphology and immunoprofile of Brenner tumors and Walthard nests suggest a probable link between Brenner tumors and Walthard nests. Two additional cases presented highlight small transitional lesions involving the ovary: a possible precursor lesion or the initial steps of Brenner tumor formation. Brenner tumors and most Walthard nests lacked staining for Müllerian (PAX8 and PAX2) and germ cell tumor markers (SALL4). Copyright © 2014 Elsevier Inc. All rights reserved.

  15. Immunohistochemical detection of autotaxin (ATX)/lysophospholipase D (lysoPLD) in submucosal invasive colorectal cancer.

    Science.gov (United States)

    Kazama, Shinsuke; Kitayama, Joji; Aoki, Junken; Mori, Ken; Nagawa, Hirokazu

    2011-12-01

    Autotaxin (ATX) is molecularly identical to lysophospholipase D (lysoPLD) and is a main enzyme producing lysophosphatidic acid (LPA), which mediates a broad range of cellular responses including stimulation of cell motility. Using immunohistochemical staining, we examined the expression of ATX/lysoPLD in 98 cases of early colorectal cancer with submucosal invasion. ATX/lysoPLD was highly expressed in infiltrating cells in tumor tissue in the submucosal layer, which were characterized as mast cells. The number of ATX/lysoPLD-positive cells was significantly greater in tumors with a macroscopically depressed lesion than in tumors without depression. The density of ATX/lysoPLD-positive cells tended to have a positive correlation with microvessel vascular density (MVD), while it was not correlated with vessel invasion and nodal metastases as well as lymphovascular vessel density (LVD). Our results suggest that local production of LPA through ATX/lysoPLD may weakly correlate with formation of a depressive lesion and tumor angiogenesis in the early stage of colorectal cancer.

  16. Lectin immunohistochemical evaluation of human bladder carcinomas. A comparison of Carnoy's and formalin fixation.

    Science.gov (United States)

    Okamura, T; Ueda, K; Ohtaguro, K; Inoue, K; Washida, H; Mori, M; Tatemoto, Y; Fukushima, S

    1993-10-01

    A lectin immunohistochemical analysis of 51 human bladder carcinomas, including 44 cases of transitional cell carcinoma (TCC) (G1, 15 cases; G2, 17 cases; G3, 12 cases) and 7 cases of squamous cell carcinoma (SCC), was performed. Tissues were obtained by cold punch biopsies, fixed in Carnoy's or 10% formalin solution, stained for binding of 10 different lectins, and evaluated under the light microscope. The lectins used were concanavalin agglutinin (Con A), soybean agglutinin (SBA), Lotus tetragonolobus agglutinin (LTA), Dolichos biflorusa agglutinin (DBA), peanut agglutinin (PNA), Ricinus communis agglutinin I (RCA1), Ulex europaeus agglutinin I, II (UEA-I, II), wheat germ agglutinin (WGA), and Pisum sativum agglutinin (PEA). TCC prepared with Carnoy's fixation tended to show moderately positive Con A, UEA-I, and WGA reactions for G1, and strongly positive reactions for G2 and G3 lesions. UEA-II was mainly negative in G1, but tended to increase to become moderate in G3. DBA tended to show a moderately positive reaction in G1 and G2, but was mainly negative in G3. With formalin fixation, only RCA1 demonstrated grade specific variation, tendency to react moderately in the G1 and G2 cases, and strongly in G3. There were no further differences among the histopathological grades of TCC for other lectins. Thus, Carnoy's fixation appears superior for distinguishing between grades of lesions. SCC tended to react more strongly than TCC with all the various lectins except PEA, independent of fixation.

  17. Cyclooxygenase-2 expression in central giant cell lesion of the jaws: an immunohistochemical study.

    Science.gov (United States)

    Nogueira, Renato Luiz Maia; Faria, Mário Henrique Girão; Osterne, Rafael Lima Verde; Cavalcante, Roberta Barroso; Ribeiro, Ronaldo Albuquerque; Rabenhorst, Silvia Helena Barem

    2012-02-01

    Central Giant Cell Lesion (CGCL) is an uncommon benign jaw lesion, with uncertain etiology, and a variable clinical behavior. Studies of molecular markers of CGCL, may help understanding better the nature and behavior of this lesion, and eventually may represent a definitive target to pharmacological approach in the treatment of CGCL. Chronic inflammation has been found to mediate a wide variety of diseases including neoplasms. Among the gene products involved in the induction of the inflammatory process, Cyclooxygenase 2 (COX-2) has been shown to have a close relationship with tumorigenesis, however COX-2 expression has never been evaluated in CGCL. The aim of the study was to investigate the expression of COX-2 in CGCL. Immunohistochemical assessment for COX-2 expression was performed in 18 patients previously diagnosed with CGCL. Multinucleated giant cells (MGC) and mononucleated stromal cells (MSC) were used in the slide analysis. Among the patients studied, 10 were male and 8 were female, with a median age of 15.4 years. Lesions in the mandible were observed in 11 cases and 7 were found in the maxilla. There were 9 aggressive and 9 non-aggressive CGCLs. COX-2 immunopositivity was present in only 3 cases stained in both MGC and MSC. All 3 cases presented with ulcerations in the mucosa lesion, suggesting that the COX-2 expression is due to the presence of inflammation. This study does not support the involvement of COX-2 in the etiophatogenesis of CGCL.

  18. Immunohistochemical expression of basement membrane proteins of verrucous carcinoma of the oral mucosa.

    Science.gov (United States)

    Arduino, Paolo G; Carrozzo, Marco; Pagano, Marco; Broccoletti, Roberto; Scully, Crispian; Gandolfo, Sergio

    2010-06-01

    Squamous cell carcinoma (SCC) of the oral cavity is an extremely invasive tumour of stratified squamous epithelium that spreads throughout degradation of the basement membrane (BM) and extra-cellular matrix. Oral verrucous carcinoma (VC) is a rare low-grade variant of oral SCC that penetrates into the subepithelial connective tissue. It also has a different clinical behaviour from classical oral SCC. We investigated the immunohistochemical expression of laminin, laminin-5, collagen IV and fibronectin in VC, severe epithelial dysplasia (SED) and SCC in order to analyse if the pattern of these molecules expression contributes to the differences in the biological behaviour of these diseases. The staining pattern of laminin was less intensive in SCC compared with SED and VC, and collagen IV expression was increased in VC compared with SED. Discontinuities of laminin, collagen IV and fibronectin were more evident in SED than in VC. This study indicates that VC has a biological behaviour different from SED or SCC, observable by immunohistochemistry in the BM zone.

  19. Salivary gland basal cell and canalicular adenomas: immunohistochemical demonstration of myoepithelial cell participation and morphogenetic considerations.

    Science.gov (United States)

    Zarbo, R J; Prasad, A R; Regezi, J A; Gown, A M; Savera, A T

    2000-03-01

    To evaluate cellular composition of salivary gland adenomas using 3 monoclonal antibodies that recognize a smooth muscle phenotype confirmed to be sensitive for myoepithelial differentiation. Immunohistochemical evaluation of 25 salivary gland basal cell and canalicular adenomas. Archival pathology material from the files of Henry Ford Hospital, Detroit, Mich, and the University of California at San Francisco. All basal cell adenoma variants exhibit some degree of myoepithelial cell participation with periductal, epithelioid, and spindled (stromal-like) morphologic structures. Only the canalicular adenomas, even if mixed with trabecular and solid patterns, are devoid of staining with these 3 antibodies, suggesting an adenoma composed exclusively of ductal luminal cells. There is an overlapping histomorphologic and common cellular composition of the basal cell adenoma variants with other recognized adenomas, such as pleomorphic adenoma and myoepithelioma. Relative differentiation toward 3 cell phenotypes (ductal luminal, basal, and myoepithelial) and the character of extracellular matrix production in varying proportions by the neoplastic myoepithelial cells distinguishes the spectrum of salivary gland adenomas identified in current classification schemes.

  20. Immunohistochemical Expression of p53 in Pleomorphic Adenoma and Carcinoma Ex Pleomorphic Adenoma

    Directory of Open Access Journals (Sweden)

    Bassel Tarakji

    2010-01-01

    Full Text Available Context. Immunohistochemical stains for p53 are used as a diagnostic marker associated with malignancy in several histologic types of salivary gland tumors. This marker may be useful in differentiating pleomorphic adenoma (PA from carcinoma ex pleomorphic adenoma (CPA, as these tumors are often difficult to distinguish on the basis of morphology alone. Objective. to evaluate whatever inactivation of tumor suppressor gene (p53 increases with the tumor progression from normal salivary tissue to PA and eventually CPA. Design. Paraffin blocks of 29 cases of PA, which were surrounded by normal parotid gland, and 27 cases of carcinoma ex pleomorphic adenoma were retrieved and validated. In all cases of carcinoma ex pleomorphic adenoma, a PA “ghost” was identified, and the malignant element was either undifferentiated carcinoma or adenocarcinoma. Results. The results showed negative nuclear expression of P53 in normal parotid gland. Nuclear P53 was expressed strongly in 6/29 (20.7% pleomorphic salivary adenoma and 10/27 (37% carcinoma ex pleomorphic adenoma. Conclusion. Our data suggest that inactivation of p53 may play an important role in the evolution of pleomorphic salivary adenoma and carcinoma ex pleomorphic adenoma.

  1. Immunohistochemical localization of aquaporin 4 (AQP4 in the porcine gastrointestinal tract

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    Marcin Bartłomiej Arciszewski

    2015-01-01

    Full Text Available The water channel aquaporin-4 (AQP4 is a protein widely expressed on plasma membrane of a variety of epithelial cells. In this study we investigated the expression of AQP4 in the gastrointestinal tract of the pig using immunohistochemical staining. We found no presence of AQP4 in the different regions of the pig stomach. In the porcine small intestine moderate immunoreactivity to AQP4 was detected in enterocytes (along the villi and in the bottom of the crypts, duodenal Brunner’s glands and in enteric ganglia in cells lying in close vicinity to myenteric as well as submucous neurons. In superficial epithelial cells of the colonic mucosa as well as of caecal and colonic glands a very strong immunoreactivity to AQP4 was found. Both in the myenteric and submucous ganglia of the large intestine AQP4-positive cells surrounding enteric neurons were observed. We concluded that AQP4 expression in the porcine gastrointestinal tract showed some species-dependent differences in relation to other species. Based on the presented distribution pattern of AQP4, it is likely that the aquaporin plays a role in mucous (but not acid secretion and intestinal absorptive processes in the pig.

  2. Detection of oral squamous cell carcinoma metastasis with cathepsin D: An immunohistochemical approach

    Directory of Open Access Journals (Sweden)

    Seema Kapoor

    2014-01-01

    Full Text Available Background: The lysosomal protease cathepsin D (CD has been associated with tumor progression in malignant tumors including oral squamous cell carcinoma (OSCC. The purpose of this study was to find out any association between the CD and lymph node metastasis and to study the correlation of CD with various clinicopathological parameters to aid in assessment of its role as a prognostic indicator. Materials and Methods: Immunohistochemical staining was performed on 20 OSCC samples with polyclonal antibody against CD. Positive results indicative of the presence of CD were further analyzed to determine any correlation between the CD and other clinicopathological parameters. Pearson Chi-square analyses, Spearsman correlation coefficient, Mann-Whitney test, Kruskal Wallis test and student t test were used for statistical analysis (P < 0.05. Results: Patients with lymph node metastasis showed statistically significant increase in CD expression (P < 0.01. Increasing tumor size seemed to correlate with increased CD expression (P < 0.05. Conclusion: Based on its association with other clinicopathological variables, CD expression can be used for the assessment of patient survival in cases of OSCC.

  3. Lubricin expression in human osteoarthritic knee meniscus and synovial fluid: a morphological, immunohistochemical and biochemical study.

    Science.gov (United States)

    Musumeci, Giuseppe; Trovato, Francesca Maria; Loreto, Carla; Leonardi, Rosalia; Szychlinska, Marta Anna; Castorina, Sergio; Mobasheri, Ali

    2014-06-01

    The purpose of this study was to investigate the expression of lubricin, the product of the human PRG4 (proteoglycan 4) gene, in menisci and synovial fluid from normal donors and patients with osteoarthritis (OA), using a combination of histology, immunohistochemistry, ELISA and Western blotting analysis, to provide further insight on the role of this protein in the progression of OA and pathological processes in the meniscus. Lubricin expression was studied in samples from 40 patients and in 9 normal donors after arthroscopic partial meniscectomy. Histological analysis confirmed normal microanatomy and the absence of structural changes in control samples. Menisci derived from OA patients showed evidence of structural alterations, fibrillations and clefts. Immunohistochemical analysis revealed very strong lubricin immunostaining in normal menisci in contrast to weak/moderate staining seen in osteoarthritic menisci. Quantitative ELISA and Western blot analysis confirmed the above results. The findings of this study support the notion that changes in lubricin expression and boundary-lubricating ability of cartilage is followed by the development of OA. This study could provide the biological foundation for the development of novel therapeutic treatments, to be applied before the surgery, for the prevention of post-traumatic cartilage damage. Copyright © 2014 Elsevier GmbH. All rights reserved.

  4. Chronic moderate alcohol consumption induces iNOS expression in the penis: An immunohistochemical study.

    Science.gov (United States)

    Gonca, Süheyla; Yazir, Yusufhan; Göçmez, Semil Selcan; Dalçik, Ekim Nur; Utkan, Tijen; Dalçik, Hakki

    2014-01-01

    To investigate the effect of moderate alcohol consumption on metabolic alterations, inducible nitric oxide synthase (iNOS), immunohistochemical distribution, and morphological damage to penile erectile tissue in rats. Male Wistar albino rats were divided into 2 groups. Group 1 rats (control group, n = 8) received tap water ad libitum, and group 2 rats (n = 8) were fed with 20% ethanol. Increasing levels of alcohol were given to the rats over 12 weeks. Immunohistochemistry was then performed using the avidin-biotin-peroxidase technique on 5-pm thickness tissue sections. Stained sections were examined by imaging microscope. Alcohol consumption resulted in a significant increase in iNOS immunoreactivity in the penile erectile tissue. Increased iNOS expression was determined in the tunica albuginea, cavernosal smooth muscle cells, trabeculae of connective tissue, arterioles, and the urethral epithelium. Moreover, chronic alcohol consumption resulted in decreasing serum testosterone and high density lipoprotein (HDL) levels with increasing cholesterol and triglyceride levels. Chronic moderate alcohol consumption can affect penile erectile tissue by increasing iNOS immunoreactivity and induce histopathological damage such as penile fibrosis. These abnormalities are also related to the defense mechanism against morphological damage.

  5. Histopathological and immunohistochemical aspects of American cutaneous leishmaniasis before and after different treatments*

    Science.gov (United States)

    Viana, Agostinho Gonçalves; Mayrink, Wilson; Fraga, Carlos Alberto de Carvalho; Silva, Luciana Maria; Domingos, Patrícia Luciana Batista; Bonan, Paulo Rogério Ferreti; de Paula, Alfredo Maurício Batista; Botelho, Ana Cristina de Carvalho

    2013-01-01

    BACKGROUND The histopathology and immune responses of the healing process of leishmaniasis are still poorly studied. OBJECTIVES This study aimed to examine the histopathological and immunological aspects of lesions of patients with cutaneous leishmaniasis before and after different therapeutic methods. METHODS We studied 23 individuals grouped according to the treatments: Glucantime, Glucantime + Leishvacin and Glucantime + Leishvacin associated with Bacillus Calmette-Guerin. For analysis of the histopathological changes present in the dermis and epidermis, histological sections were stained with hematoxylin and eosin. The samples were immunostained before and after treatment to analyze the expression of interferon (IFN)-γ, interleukin (IL) 12, IL-10 and IL-4. RESULTS Before treatment the presence of intense infiltrates of mononuclear cells was noticed and after treatment, even with a diagnosis of clinical cure, the subjects still showed a moderate inflammatory process. In the immunohistochemical analyses, we noticed a difference between the cytokines, with increased expression of cytokines IFN-γ and IL-12 compared to IL 10 and IL-4, both before and after treatment and, comparatively, the difference in this expression was more intense before treatment. However, the cytokine expression analyzed by treatment group showed no statistically significant difference. CONCLUSION We conclude that a clinical cure does not always coincide with the histopathological one, and that before treatment there is a predominance of Th1 cytokines. In terms of treatment type, there was no difference in the progression of healing for all the three types of treatment, indicating their clinical equivalence. PMID:23539001

  6. Histopathological and immunohistochemical aspects of American cutaneous leishmaniasis before and after different treatments.

    Science.gov (United States)

    Viana, Agostinho Gonçalves; Mayrink, Wilson; Fraga, Carlos Alberto de Carvalho; Silva, Luciana Maria; Domingos, Patrícia Luciana Batista; Bonan, Paulo Rogério Ferreti; Paula, Alfredo Maurício Batista de; Botelho, Ana Cristina de Carvalho

    2013-01-01

    The histopathology and immune responses of the healing process of leishmaniasis are still poorly studied. This study aimed to examine the histopathological and immunological aspects of lesions of patients with cutaneous leishmaniasis before and after different therapeutic methods. We studied 23 individuals grouped according to the treatments: Glucantime, Glucantime + Leishvacin and Glucantime + Leishvacin associated with Bacillus Calmette-Guerin. For analysis of the histopathological changes present in the dermis and epidermis, histological sections were stained with hematoxylin and eosin. The samples were immunostained before and after treatment to analyze the expression of interferon (IFN)-γ, interleukin (IL) 12, IL-10 and IL-4. Before treatment the presence of intense infiltrates of mononuclear cells was noticed and after treatment, even with a diagnosis of clinical cure, the subjects still showed a moderate inflammatory process. In the immunohistochemical analyses, we noticed a difference between the cytokines, with increased expression of cytokines IFN-γ and IL-12 compared to IL 10 and IL-4, both before and after treatment and, comparatively, the difference in this expression was more intense before treatment. However, the cytokine expression analyzed by treatment group showed no statistically significant difference. We conclude that a clinical cure does not always coincide with the histopathological one, and that before treatment there is a predominance of Th1 cytokines. In terms of treatment type, there was no difference in the progression of healing for all the three types of treatment, indicating their clinical equivalence.

  7. Immunohistochemical distribution of Plexin A4 in the adult rat central nervous system

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    Claire-Anne Gutekunst

    2010-07-01

    Full Text Available PlexinA4 is the latest member to be identified of the plexin A subfamily, critical transducers of class 3 semaphorin signaling as co-receptors to neuropilins 1 and 2. Despite functional information regarding the role of PlexinA4 in development and guidance of specific neuronal pathways, little is known about its distribution in the adult central nervous system (CNS. Here we report an in depth immunohistochemical analysis of PlexinA4 expression in the adult rat CNS. PlexinA4 staining was present in neurons and fibers throughout the brain and spinal cord, including neocortex, hippocampus, lateral hypothalamus, red nucleus, facial nucleus and the mesencephalic trigeminal nucleus. PlexinA4 antibodies labeled fibers in the lateral septum, nucleus accumbens, several thalamic nuclei, substantia nigra pars reticulata, zona incerta, pontine reticular region, as well as in several cranial nerve nuclei. This constitutes the first detailed description of the topographic distribution of PlexinA4 in the adult CNS and will set the basis for future studies on the functional implications of PlexinA4 in adult brain physiology.

  8. Thymomas With Extensive Clear Cell Component:  A Clinicopathologic and Immunohistochemical Study of Nine Cases.

    Science.gov (United States)

    Weissferdt, Annikka; Kalhor, Neda; Moran, Cesar A

    2016-07-01

    Nine cases of thymomas with an extensive clear cell component are presented. The patients were six men and three women aged between 45 and 62 years (mean, 52 years). Presenting symptoms included shortness of breath, chest pain, and cough. Diagnostic imaging revealed anterior mediastinal masses in all patients, and all underwent thymectomy. Grossly, the tumors varied from 3 to 9 cm in the greatest dimension. Four cases were invasive and five encapsulated. Histologically, the tumors were characterized by an epithelial cell component with extensive clear cell change, admixed with lymphocytes in varying proportions. Immunohistochemically, the tumors demonstrated the typical immunophenotype of thymomas characterized by positive staining of the epithelial cells for pancytokeratin and cytokeratin 5/6, absent expression of CD5 and c-kit, and reactivity of the lymphocytes for terminal deoxynucleotidyl transferase. Clinical follow-up available for six patients showed that all were alive and well 12 to 24 months after surgical resection. The cases herein presented highlight an unusual feature in thymoma that has more commonly been ascribed to thymic carcinoma. They also emphasize the importance of correct diagnosis to determine the appropriate treatment strategy and to accurately predict prognosis. © American Society for Clinical Pathology, 2016. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

  9. Desmoplastic spindle cell thymomas: a clinicopathologic and immunohistochemical study of 14 cases.

    Science.gov (United States)

    Weissferdt, Annikka; Moran, Cesar A

    2013-04-01

    Fourteen cases of spindle cell thymoma with prominent desmoplastic changes are presented. The patients are 9 women and 5 men between the ages of 46 and 79 years. Clinically, the patients presented with symptoms of chest pain, shortness of breath, and dyspnea. Radiographic imaging showed the presence of an anterior mediastinal mass, and surgical resection of the tumor mass was accomplished in all of the cases. Grossly, all the tumors were described as ovoid tumor masses measuring between 4 and 9 cm in greatest dimension. At cut surface, the tumors were described as solid and light tan-brown in color. Necrosis and hemorrhage were not recorded in any of the cases. Histologically, 8 cases were invasive, and 6 were encapsulated tumors. Extensive areas of young fibrocollagen and a prominent fibroblastic proliferation characterized the tumors. Scattered areas of more conventional spindle cell thymoma were present in all cases but mitotic activity, necrosis, and/or hemorrhage were not identified. Immunohistochemical stains were performed in 9 cases, showing tumor cells positive for pancytokeratin, cytokeratin 5/6, Bcl-2, Pax8, and vimentin. Clinical follow-up in 8 patients showed that all are alive and well 1 to 8 years after diagnosis. The current growth pattern of spindle cell thymomas is unusual and should be kept in mind when evaluating mediastinoscopic biopsies. Copyright © 2013 Elsevier Inc. All rights reserved.

  10. Immunohistochemical study of polycystin-1 in dentigerous cysts

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    Jaishlal Mariachelliah Nadar Singarayan

    2014-01-01

    Discussion and Conclusion: All PC1 positive epithelial cells′ cytoplasm stained diffusely. Abnormal cytoplasmic expression of PC1 in all positive epithelial lining indicates that the PC1 probably is associated with cystic transformation.

  11. Immunohistochemical detection of estrogen receptors in canine mammary tumors

    OpenAIRE

    Elena Atanaskova Petrov; Ivica Gjurovski; Trpe Ristoski; Goran Nikolovski; Pandorce Trenkoska; Plamen Trojacanec; Ksenija Ilievska; Toni Dovenski; Gordana Petrushevska

    2016-01-01

    Mammary tumors are among the most common neoplasms in intact female dogs.They have a complex morphology, usually affecting middle age and older bitches. Almost 50% of the mammary tumors in dogs are malignant neoplasms. Prognosis is based on several factors: stage, age, tumor size, metastasis, histopathology, ovariectomy status and hormone-receptor activity. Immunohistochemical (IHC) measurement has become increasingly an important diagnostic and prognostic parameter, with the development of m...

  12. Immunohistochemical Characteristics of Triple Negative/Basal-like Breast Cancer

    OpenAIRE

    Emel Ebru PALA; Ümit BAYOL; Süheyla CUMURCU; Elif KESKİN

    2012-01-01

    Objective: Triple-negative-breast-cancer that accounts for 10-20% of all breast carcinomas is defined by the lack of estrogen receptor, progesterone receptor, HER2 expression, and agressive clinical behavior. Triple-negative-breast-cancer is categorized into basal like and other types. The basal-like subtype is characterized by the expression of myoepithelial/basal markers.Material and Method: We studied 41 immunohistochemically triplenegative- breast-cancer patients to determine EGFR, Cytoke...

  13. Immunohistochemical Examination of a Resected Advanced Hilar Cholangiocarcinoma Arising in a 29-Year-Old Male without Primary Sclerosing Cholangitis

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    Taketoshi Suehiro

    2010-05-01

    Full Text Available A 29-year-old man with advanced hilar cholangiocarcinoma was successfully treated with an extended right lobectomy. The carbohydrate antigen 19-9 (CA19-9 level was elevated to 939 IU/l, and the pathological findings revealed moderately differentiated tubular adenocarcinoma which involved almost the entire thickness of the hepatic duct and the adjacent liver tissue (T3 and which was associated with lymph node metastasis (N1. It was a stage IIB (T3N1M0 tubular adenocarcinoma according to UICC pathological staging. Immunohistochemical examination revealed that Ki-67, cyclin D1, and MMP-7 were positive, and 14-3-3σ and p27 were negative. The pathological and immunohistochemical findings indicated high malignant potential indicating poor prognosis. We administrated the postoperative adjunct gemcitabine combined with S-1 chemotherapy. The patient is alive without recurrence and doing well two years after surgery. We also review other reports of cholangiocarcinoma patients aged less than 30 years.

  14. Immunohistochemical Examination of a Resected Advanced Hilar Cholangiocarcinoma Arising in a 29-Year-Old Male without Primary Sclerosing Cholangitis

    Science.gov (United States)

    Suehiro, Taketoshi; Matsumata, Takashi; Iguchi, Tomohiro; Sanefuji, Kensaku; Nomoto, Ken-ichi; Taketomi, Akinobu; Shirabe, Ken; Maehara, Yoshihiko

    2010-01-01

    A 29-year-old man with advanced hilar cholangiocarcinoma was successfully treated with an extended right lobectomy. The carbohydrate antigen 19-9 (CA19-9) level was elevated to 939 IU/l, and the pathological findings revealed moderately differentiated tubular adenocarcinoma which involved almost the entire thickness of the hepatic duct and the adjacent liver tissue (T3) and which was associated with lymph node metastasis (N1). It was a stage IIB (T3N1M0) tubular adenocarcinoma according to UICC pathological staging. Immunohistochemical examination revealed that Ki-67, cyclin D1, and MMP-7 were positive, and 14-3-3σ and p27 were negative. The pathological and immunohistochemical findings indicated high malignant potential indicating poor prognosis. We administrated the postoperative adjunct gemcitabine combined with S-1 chemotherapy. The patient is alive without recurrence and doing well two years after surgery. We also review other reports of cholangiocarcinoma patients aged less than 30 years. PMID:20805936

  15. Confusion over live/dead stainings for the detection of vital microorganisms in oral biofilms--which stain is suitable?

    Science.gov (United States)

    Netuschil, Lutz; Auschill, Thorsten M; Sculean, Anton; Arweiler, Nicole B

    2014-01-11

    There is confusion over the definition of the term "viability state(s)" of microorganisms. "Viability staining" or "vital staining techniques" are used to distinguish live from dead bacteria. These stainings, first established on planctonic bacteria, may have serious shortcomings when applied to multispecies biofilms. Results of staining techniques should be compared with appropriate microbiological data. Many terms describe "vitality states" of microorganisms, however, several of them are misleading. Authors define "viable" as "capable to grow". Accordingly, staining methods are substitutes, since no staining can prove viability.The reliability of a commercial "viability" staining assay (Molecular Probes) is discussed based on the corresponding product information sheet: (I) Staining principle; (II) Concentrations of bacteria; (III) Calculation of live/dead proportions in vitro. Results of the "viability" kit are dependent on the stains' concentration and on their relation to the number of bacteria in the test. Generally this staining system is not suitable for multispecies biofilms, thus incorrect statements have been published by users of this technique.To compare the results of the staining with bacterial parameters appropriate techniques should be selected. The assessment of Colony Forming Units is insufficient, rather the calculation of Plating Efficiency is necessary. Vital fluorescence staining with Fluorescein Diacetate and Ethidium Bromide seems to be the best proven and suitable method in biofilm research.Regarding the mutagenicity of staining components users should be aware that not only Ethidium Bromide might be harmful, but also a variety of other substances of which the toxicity and mutagenicity is not reported. - The nomenclature regarding "viability" and "vitality" should be used carefully.- The manual of the commercial "viability" kit itself points out that the kit is not suitable for natural multispecies biofilm research, as supported by an

  16. Metabolic markers in relation to hypoxia; staining patterns and colocalization of pimonidazole, HIF-1α, CAIX, LDH-5, GLUT-1, MCT1 and MCT4

    International Nuclear Information System (INIS)

    Rademakers, Saskia E; Lok, Jasper; Kogel, Albert J van der; Bussink, Johan; Kaanders, Johannes HAM

    2011-01-01

    The cellular response of malignant tumors to hypoxia is diverse. Several important endogenous metabolic markers are upregulated under hypoxic conditions. We examined the staining patterns and co-expression of HIF-1α, CAIX, LDH-5, GLUT-1, MCT1 and MCT4 with the exogenous hypoxic cell marker pimonidazole and the association of marker expression with clinicopathological characteristics. 20 biopsies of advanced head and neck carcinomas were immunohistochemically stained and analyzed. All patients were given the hypoxia marker pimonidazole intravenously 2 h prior to biopsy taking. The tumor area positive for each marker, the colocalization of the different markers and the distribution of the markers in relation to the blood vessels were assessed by semiautomatic quantitative analysis. MCT1 staining was present in hypoxic (pimonidazole stained) as well as non-hypoxic areas in almost equal amounts. MCT1 expression showed a significant overall correlation (r = 0.75, p < 0.001) and strong spatial relationship with CAIX. LDH-5 showed the strongest correlation with pimonidazole (r = 0.66, p = 0.002). MCT4 and GLUT-1 demonstrated a typical diffusion-limited hypoxic pattern and showed a high degree of colocalization. Both MCT4 and CAIX showed a higher expression in the primary tumor in node positive patients (p = 0.09 both). Colocalization and staining patterns of metabolic and hypoxia-related proteins provides valuable additional information over single protein analyses and can improve the understanding of their functions and environmental influences

  17. A simplified immunohistochemical classification of skeletal muscle fibres in mouse

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    M. Kammoun

    2014-06-01

    Full Text Available The classification of muscle fibres is of particular interest for the study of the skeletal muscle properties in a wide range of scientific fields, especially animal phenotyping. It is therefore important to define a reliable method for classifying fibre types. The aim of this study was to establish a simplified method for the immunohistochemical classification of fibres in mouse. To carry it out, we first tested a combination of several anti myosin heavy chain (MyHC antibodies in order to choose a minimum number of antibodies to implement a semi-automatic classification. Then, we compared the classification of fibres to the MyHC electrophoretic pattern on the same samples. Only two anti MyHC antibodies on serial sections with the fluorescent labeling of the Laminin were necessary to classify properly fibre types in Tibialis Anterior and Soleus mouse muscles in normal physiological conditions. This classification was virtually identical to the classification realized by the electrophoretic separation of MyHC. This immunohistochemical classification can be applied to the total area of Tibialis Anterior and Soleus mouse muscles. Thus, we provide here a useful, simple and time-efficient method for immunohistochemical classification of fibres, applicable for research in mouse

  18. Ameloblastoma vs basal cell carcinoma: an immunohistochemical comparison.

    Science.gov (United States)

    Jawad, Salam N; Abdullah, Bashar H

    2016-12-01

    Despite behavioral mimicry of ameloblastoma (AB) and basal cell carcinoma (BCC), they are classified at 2 extremes within pertinent WHO classifications with respect to benign and malignant designation. This study aims to appraise the current allocation of AB in the classification through an immunohistochemical comparison of some aspects of behavior with BCC. Sections from retrospectively retrieved formalin-fixed, paraffin-embedded tissue blocks of AB (n = 37) and BCC (n = 34) were comparatively examined for the immunohistochemical expression for Ki-67, Bcl-2, MMP-2, MMP-9, CD31, and D2-40 monoclonal antibodies. No statistically significant differences between the tumors were found regarding the immunoexpressions of Bcl-2 (P = .252), CD31 microvessel density (P = .895), lymphatic vessel density (P = .642), and MMP-9 stromal expression (P = .083). MMP-2 expression was significantly higher in epithelial and stromal regions of AB (P = .009 and P = .001, respectively), whereas Ki-67 and MMP-9 epithelial expressions were significantly higher in BCC (P < .000 and P = .026, respectively). Within the studied immunohistochemical attributes for tumor behavior, the study accentuated the overall behavioral mimicry of the tumors and indicated that BCCs surmount ABs by the proliferative rate only. Copyright © 2016 Elsevier Inc. All rights reserved.

  19. Immunohistochemical study of genital and extragenital forms of canine transmissible venereal tumor in Brazil

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    Mariana B. Mascarenhas

    2014-03-01

    Full Text Available Aiming to provide insight and discussing the problems related to the diagnosis and differential diagnosis of canine transmissible venereal tumor (CTVT, especially in its extragenital form, immunohistochemical evaluation was performed and a comparison was established by analysis of the microscopic appearance of 10 genital CTVTs and 13 exclusively extragenital CTVTs previously diagnosed by cytology and histopathology. CTVTs samples were incubated with biotinylated antibodies raised against specific membrane (anti-macrophage and cytoplasmic antigens (anti-lysozyme, anti-S-100 protein, anti-vimentin and anti-CD18 and subsequently developed using streptavidin-biotin peroxidase and streptavidin-biotin-alkaline phosphatase methods. A strong reactivity with the anti-vimentin antibody was found in 100% of the tumors tested (22/22. No reactivity was found for the anti-lysozyme, anti-macrophage, anti-S-100 protein and anti-CD18. No histopathological or immunoreactivity differences between genital and extragenital CTVTs were found. These findings do not corroborate the hypothesis of histiocytic origin of CTVT (no reactivity to anti-lysozyme, anti-macrophage and anti-CD 18 antibodies. In addition, the antibody panel used is useful to narrow the differential diagnosis for lymphomas, histiocytic tumors, amelanotic melanomas, and poorly differentiated epithelial neoplasias, among others.

  20. Immunohistochemical profile of various neurotransmitters, neurotrophins and MIB-1 in cholesteatomas of the petrous bone.

    Science.gov (United States)

    Artico, Marco; Bronzetti, Elena; Lo Vasco, Vincenza Rita; Ionta, Brunella; Alicino, Valentina; D'Ambrosio, Anna; Magliulo, Giuseppe

    2008-01-01

    Compared to the normal epidermal epithelium, cholesteatomas have altered growth properties characterized by the excessive growth of keratinocytes leading to mucosal destruction. Either congenital or acquired, these lesions, which grow in the middle ear space, the petrous apex or the mastoid of temporal bones, are mostly considered benign skin tumoral lesions. However, many questions remain concerning their pathophysiology. Numerous studies have been proposed to identify those cholesteatoma lesions at risk of recurrence, a possible event that may cause hearing loss. We examined patients with petrous apex or mastoid cholesteatoma in order to analyze the expression of various neurotransmitters, neurotrophins and their receptors and the Ki-67 antigen for identification of a possible relationship between clinical outcome and histopathological behaviour in terms of the proliferative activity of cholesteatomas. Expression of the analyzed molecules was studied using immunohistochemical methods in seven adult patients with petrous apex cholesteatoma who underwent surgical removal of the lesion. Our results, in accordance with published data, confirm that Molecular Immunology Borstel-1 (MIB-1) and certain neurotransmitters could be useful in the prognostic evaluation of the risk of recurrence of aggressive forms of cholesteatoma.