Sample records for TIROGLOBULINA (thyroglobulin)
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1

Tiroglobulina y sus limitaciones en el seguimiento del carcinoma diferenciado del tiroides: Report of two cases/ Recurrence of differentiated thyroid carcinoma without concomitant elevation of serum thyroglobulin

Velasco L, Soledad; Solar G, Antonieta; Cruz O, Francisco; Quintana F, Juan Carlos; León R, Augusto; Mosso G, Lorena; Fardella, Carlos
2007-04-01

Resumen en inglés Thyroid carcinoma is the most prevalent endocrine tumor, and the papillary carcinoma (PC) is the most common histological type. In the follow-up, after thyroidectomy serum thyroglobulin (s-Tg) is used as a marker to evaluate recurrence of thyroid carcinoma. In most cases, this parameter allows an adequate diagnosis, but occasionally s-Tg may miss the detection of a recurrence. We report a 57 year-old female and a 36 year-old male sujected to a total thyroidectomy for a pa (mas) pillary thyroid carcinoma with intermediate and high-risk of recurrence. Both had a cervical recurrence without a concomitant increase in s-Tg levels. In both, Tg staining was positive in the tumor cells. These cases confirm that in these patients, the follow-up must be done with measurement of s-Tg and complementary diagnostic tests

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2

Anticuerpos anti-tiroglobulina en el seguimiento de pacientes con cáncer diferenciado de tiroides: ¿Marcadores de enfermedad residual o recidivante?/ Anti thyroglobulin antibodies in the follow up of patients with differentiated thyroid cancer

Quevedo L, Iván; Campino J, Carmen; Rodríguez Portales, José A.; Arteaga U, Eugenio; López M, José Manuel; Campusano M, Claudia; González V, Gilberto; Fardella B, Carlos; Slater M, Jenny; Valdivia V, Ligia; Poggi M, Helena; Foradori C, Arnaldo; Velasco L, Soledad
2002-02-01

Resumen en inglés Background: Anti thyroglobulin antibodies are present in 25% of patients treated for a differentiated thyroid cancer, invalidating thyroglobulin determination. Those patients subjected to total thyroidectomy and free of disease, should reduce the production of these antibodies, due to the lack of antigenic stimulus. Therefore, anti thyroglobulin antibodies could be useful to detect early relapses. Aim: To assess the relationship between anti thyroglobulin antibodies and t (mas) he evolution of the disease in patients treated for thyroid cancer. Material and methods: Retrospective analysis of 26 patients treated for thyroid cancer with positive anti thyroglobulin antibodies, followed for three years. These were divided in those with or without lymphocytic thyroiditis (19 and 7 respectively). Results: At the first year of follow up, anti thyroglobulin antibody concentration was 401±94.9 UI/ml (x±sem) in patients with thyroiditis and 38.9±8.9 UI/ml in those without thyroiditis (p

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3

Utilidad de la detección de tiroglobulina en el aspirado de punción ganglionar cervical en el seguimiento de pacientes con cancer papilar de tiroides/ Thyroglobulin levels in needle lymph node cytology for the detection of papillary thyroid cancer recurrence

Véliz, Jesús; Brantes, Sergio; Ramos, Claudia; Aguayo, Jaime; Cáceres, Edith; Herrera, Mónica; Barber, Ana; Barría, Manuel; Wohllk, Nelson
2008-09-01

Resumen en inglés Background: During the detection ofneck recurrence in patients with Papillary Thyroid Carcinoma (PTC), sometimes it is difficult to distinguish metastatic from inflammatory neck lymph nodes. The measurement of serum thyroglobulin (sTg) under thyroid hormone suppression therapy the presence of serum thyroglobulin antibodies (sAbTg), the diagnostic whole body sean and cytology can give false negative results. Measurement of thyroglobulin in the washout fluid from fine-needl (mas) e aspiration biopsy (FNAB) of suspicious neck lymph nodes could improve the diagnostic aecuracy Aim: To evaluate the usefulness of detecting Tg in lymph nodes (LTg) suspicious by ultrasonography (US) and compare it to cytology. Patients and Methods: Between the years 2004 and 2007 we prospectively studied 30 patients with PTC and cervical US findings of suspicious recurrence. LTg was assayed in US guided FNAB used for cytology. Results: Sixteen out of 30 patients underwent surgery using as selective criteria an LTg higher than sTg or a positive cytology. Surgery confirmed the presence of metástasis in all 15 patients with positive LTg (8 with positive cytology) and in 1 patient with negative LTg and positive cytology (a case with undifferentiated thyroid cancer). The sensitivity was 93.7% for LTg and 56.2% for cytology. We identified byLTg 3 of 6 patients with undetectable sTg and positive sAbTg. Conclusions: The presence of LTg showed a higher sensitivity than cytology for the detection of cervical lymph node metástasis. This method is useful even in the presence ofsAbTg

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4

Valor de la determinación de la tiroglobulina sérica y de la gammagrafía mediante I-131 en el seguimiento del cáncer diferenciado de tiroides/ Value of the detection of serum thyroglobulin and I-131 scintigraphy in the follow-up of differentiated thyroid cancer

Ruiz Hernández, G.; Vázquez Forner, C.; Fliquete Peris, M. V.
2000-12-01

Resumen en español Objetivo: El objetivo de nuestro estudio ha sido conocer la sensibilidad de la determinación de la tiroglobulina sérica y de la gammagrafía corporal mediante I-131 en la detección de tejido tiroideo residual y de la enfermedad loco-regional y a distancia; así como el valor predictivo de la tiroglobulina en el seguimiento de pacientes con cáncer diferenciado de tiroides. Método: Para ello hemos realizado un estudio retrospectivo de 218 enfermos con cáncer diferenci (mas) ado de tiroides, diagnosticados y tratados de forma homogénea, en los que se había solicitado la determinación de tiroglobulina (TG) y la gammagrafía con I-131 tras efectuar la intervención quirúrgica y entre los 6 y los nueve meses posteriores a la misma, valorando ambas pruebas de “screening” en situación hormonal de hipotiroidismo. Se han excluido del estudio 16 pacientes con anticuerpos antitiroglobulina y 14 enfermos por carecer de un seguimiento completo. Resultados: Se ha obtenido una correlación entre ambas técnicas del 92%, con una sensibilidad TG/scan para la detección de recidiva local de 85 y 90% respectivamente y superior al 90% para ambas pruebas en el diagnóstico de metástasis óseas y pulmonares. En el estudio de la afectación ganglionar regional y del tejido tiroideo residual, la sensibilidad del scan fue del 100% para la gammagrafía con I-131 e inferior al 70% para la tiroglobulina sérica. La determinación de la TG demostró un valor predictivo positivo del 99%, con un valor predictivo negativo del 91% y un total de 24 resultados falsos negativos. Conclusiones: Considerando nuestro trabajo, creemos que ambas exploraciones son complementarias, con una sensibilidad subóptima de la tiroglobulina en la detección de la afectación ganglionar locoregional y del tejido tiroideo residual y un valor predictivo negativo que no permite realizar el seguimiento de pacientes con carcinoma diferenciado de tiroides, basándose únicamente en los resultados de este marcador tumoral. Resumen en inglés Objectives: The objective of this work has been to know the sensitivity of serum thyroglobulin and I-131 scintigraphy in the detection of thyroid remnants or metastases, and to evaluate the predictive value of serum thyroglobulin in the follow-up of differentiated thyroid cancer patients. Methods: We have carried out a retrospective study of 218 patients with differentiated thyroid cancer, with detection of serum thyroglobulin levels and I-131 scintigraphy in clinical sta (mas) tus of hypothyroidism, after to perform thyroidectomy and between six and nine months later. We have rejected 16 and 14 patients who have had presented high serum levels of thyroglobulin, or an incomplete follow-up. Results: Our results showed a good correlation of both parameters (92%). The sensitivity of TG and I-131 scan was 85% and 90% respecti -vely, and superior to 90% for both procedures in the diagnosis of the osseous and lung metastases. The sensitivity of I-131 scan and TG was 100% and less to 70% in the detection of thyroid remnants and regional lymphatic nodes. The positive and negative value of TG was 99% and 91%, respectively, with a total of 24 false negative results. Conclusions: Considering this study, we believe that both techniques are complementary, with a lower sensitivity of serum TG in the detection of thyroid remnants and regional lymphatic involvement, and a negative predictive value that does not permit to accomplish the follow-up of differentiated thyroid cancer patients, considering exclusively the results of this tumoral marker.

Scientific Electronic Library Online (Spanish)

5

Limitaciones técnicas de los métodos para cuantificar tiroglobulina sérica y su repercusión clínica/ Technical limitations of methods to quantify the serum thyroglobulin and its clinical repercussion

Rodríguez González, Julio César; Turcios Tristá, Silvia Elena
2010-04-01

Resumen en español La determinación de tiroglobulina sérica se emplea, sobre todo, como marcador tumoral en el seguimiento posoperatorio de pacientes con cáncer diferenciado del tiroides. Lamentablemente, los métodos de tiroglobulina sérica presentan gran variabilidad en sus cualidades analíticas y padecen problemas técnicos que repercuten sobre la utilidad clínica de esta prueba. Para cuantificar tiroglobulina sérica se emplean 2 tecnologías diferentes: los iniciales radioinmunoe (mas) nsayos competitivos y los más recientes métodos inmunométricos no competitivos. Estos últimos son más propensos a sufrir las interferencias provocadas por la presencia de autoanticuerpos tiroglobulina y anticuerpos heterofílicos, a pesar de brindar los beneficios técnicos relativos al uso de reactivos no isotópicos, menor volumen de muestra, tiempos de incubación más cortos, así como mejor sensibilidad y facilidad de automatización. Resulta esencial que los clínicos conozcan y comprendan las limitaciones técnicas inherentes a la determinación de tiroglobulina sérica y su repercusión sobre la utilidad clínica de esta, con la finalidad de hacer un uso efectivo y eficiente de esta prueba en el seguimiento posoperatorio de pacientes con cáncer diferenciado del tiroides. Resumen en inglés The serum thyroglobulin assessment is used mainly as tumor marker during the postoperative follow-up of patients presenting with thyroid differentiated cancer. Progressively, the serum thyroglobulin methods have much variability in its analytical qualities and also have technical problems affecting on the technical usefulness of this test. To quantify the serum thyroglobulin we used two different technologies: the initial competitive radioimmunoassays and the most recent (mas) non competitive inmunometrical methods. These latter are more prone to have interferences provoked by presence of thyroglobulin antibodies and heterophilic antibodies despite to offer technical beneficial relative to use of non-isotopic reagents, a lower sample volume, shorter incubation times, as well as a better sensitivity and feasibility of automation. It is essential that clinicians know and understand the technical limitations inherent of serum thyroglobulin assessment and its repercussion on its clinical usefulness to an effective and efficient use of this test during the postoperative follow-up of patients presenting thyroid differential cancer.

Scientific Electronic Library Online (Spanish)

6

Cirugía radioguiada: extirpación de metástasis de un carcinoma papilar de tiroides/ Probe-guided surgery: metastases of a papillary thyroid carcinoma. Surgical Excision

Kowadlo, A. R.; Zund, S.; Perez Irigoyen, C.
2008-09-01

Resumen en español Paciente de sexo masculino operado de Carcinoma Papilar Tiroideo (variedad folicular) con recurrencia tumoral luego de tiroidectomía, linfadenectomía y Dosis Terapéutica de Iodo 131. Bajo tratamiento con hormonas tiroideas a dosis inhibitorias de TSH, persistencia de valores elevados de Tiroglobulina Plasmática e imágenes detectables en la Ecografía y Resonancia Magnética Nuclear ( RMN). Por la Dosis Terapéutica se sospechaba que las mismas concentrarían radioyod (mas) o. Se planificó por lo tanto cirugía radioguiada, según el protocolo del Instituto Gustave Roussy (modificado). Dosis Terapéutica de Iodo 131; al 4º día Rastreo Corporal Total en Cámara Gamma (RCT); al 5º día cirugía con sonda exploradora (gamma probe) y a las 48 hs. poscirugía nuevo RCT. El procedimiento fue exitoso, pudiendo extirparse adenopatías metastásicas con la desaparición en el RCT posquirúrgico de las imágenes que fijaban francamente radioyodo en el preoperatorio. Los vlores de Tiroglobulina plasmática descendieron francamente con terapia hormonal de reemplazo, a los sesenta y noventa días postratamiento. Resumen en inglés A male patient with papillary thyroid cancer -folliculary variety- is chosen to be presented. After thyroidectomy, lymfhadenectomy and therapeutic dose of radioiodine treatments, cancer relapse was observed. After thyrotrophyn supressive therapy with l-thyroxine, a high serum thyroglobulin concentration was observed. The Ultrasonography ( US) and Magnetic Resonance (MR) images showed visible node structures in the neck. This node structures were probably going to concentr (mas) ate I-131 as seen in the first whole body scan after therapeutic dose. Therefore a radio-guided surgery was planned as the best choice. (Institute Gustave Roussy protocol). A therapeutic dose of radioiodine (I-131) was given and up to the 4th day a whole body scan was performed. In the 5th day a gamma- probe-guided surgery was performed as well, and localized metastatic foci in the pretracheal region and under right recurrent laryngeal nerve. No other foci were identified with the probe at surgery. Forty eight hours after surgery a new whole-body scan was made again. The procedure was successful. The metastatic lessions were completely dissected. The last whole body scan showed that radioiodine concentration had disappeared at all. Forty five days and three months after surgery under levothyroxin treatment, the serum thyroglobulin level concentration decrease to very low values.

Scientific Electronic Library Online (Spanish)

7

Carcinoma de Células Escamosas de Tiroides: A Propósito de un Caso/ Primary squamous cell thyroid carcinoma

Rodríguez, J.; Romero, P.; Wu, H.; Durand, A.; Leone, J.; Barciocco, C.; Califano, I.; Rojas Bilbao, E.; Califano, L.; Dioca, M.
2010-12-01

Resumen en español El carcinoma de células escamosas de tiroides (CCET) es un tumor infrecuente y agresivo. Su etiología es incierta. Ante la presencia de carcinoma escamoso en la glándula tiroides debe excluirse la posibilidad de infiltración de un tumor originado en una estructura adyacente o de metástasis de otros carcinomas. El tratamiento de elección es la cirugía radical. La mayoría de los pacientes fallecen antes del año debido a progresión local de la enfermedad. Presentam (mas) os el caso de un paciente con una masa tiroidea, con diagnóstico histológico de carcinoma escamoso (con inmunohistoquímca negativa para tiroglobulina, TTF1 y calcitonina y positiva para p63 y citok5). Los estudios clínicos, endoscópicos y radiológicos excluyeron otros sitios de origen de carcinoma escamoso. Fue tratado con quimio y radioterapia, falleciendo por progresión local luego de 9 meses. Resumen en inglés Primary squamous cell thyroid carcinoma (PSCTC) is a rare and aggressive tumor of uncertain origin. When squamous carcinoma is diagnosed, it is mandatory to exclude the possibility of primary tumor arising from an adjacent structure or representing metastases from a primary growth elsewhere. Aggressive surgical resection is the treatment of choice. However, the prognosis is poor, with a median survival of less than a year. Death is usually secondary to progression of loca (mas) l disease. We report a case of a patient presenting with a thyroid mass; biopsy was consistent with squamous cell carcinoma. On immunohistochemistry tumor cells were negative for TTF1, thyroglobulin and calcitonin. Cancer cells were positive for p63 and citok5. Extensive workup excluded the possibility of extrathyroid origin. The patient was treated with chemoradiotherapy; he died 9 months later due to local progression.

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8

Cáncer de Tiroides: Estudio descriptivo retrospectivo/ Thyroid carcinoma: A descriptive retrospective study

González, Carolina C.; Yaniskowski, María Lucy; Wyse, Eduardo P.; Giovannini, Andrea A.; López, Mónica B.; Wior, Myriam E.
2006-12-01

Resumen en español Entre todos los tumores, el carcinoma tiroideo (CT) es poco frecuente, se caracteriza por su lenta evolución y elevado porcentaje de curación. Nuestro objetivo es estudiar las características de los pacientes con CT. Analizamos retrospectivamente a 171 pacientes, edad media al diagnóstico 41.1( ± 14.6 años), que consultaron entre los años 2000-04 por CT. Se evaluaron datos de anamnesis, métodos de diagnóstico, anatomía patológica y evolución. Agrupamos a los t (mas) umores por el tamaño y según TNM (tumor-adenopatía-metástasis) en estadios (E). La presencia de tiroglobulina estimulada (Tg) > 2 ng/ml e imagen positiva (con 131I u otro radiotrazador) fueron consideradas como positivas para CT residual. De la población total el 88% fue sexo femenino, el 62% menores de 45 años, y el 77.1% tuvo función tiroidea normal. La punción con aguja fina (PAAF) fue diagnóstica en 78%. El 96% fue carcinoma papilar (CTP), 63% presentaban E I; 14% E II; 19% E III y 4% E IV. Se detectó CT residual en el 90% de los pacientes con Tg entre 2 y 10, y en el 100% con Tg > 10 ng/ml, mientras que con Tg Resumen en inglés The thyroid carcinoma (TC) is not very frequent among all cancers. Its course is slow and is high potentially curable. Our aim was to analyse the characteristics in patients with TC. A retrospective analysis on 171 patients, with an average age of 41.1 (±14,6), who asked for TC to our service between the years 2000-04, was performed. From case histories it was evaluated: anamnesis, diagnostic image, histopathology and evolution. Tumours were grouped for size and TNM (tum (mas) our-nodule-metastasis) in stages (S). A stimulated serum thyroglobulin level > 2 ng/ml and positive image with 131I or another nuclear marker were considered as positive for residual TC. In the totality of the analyzed patients 88% were female, 62% below 45 years old, and in 77% the thyroid function was normal. The fine needle aspiration (FNA) was diagnostic in 78%. Papillary thyroid carcinoma (PTC) in 96%. The 63% was SI; 14% SII; 19% SIII and 4% SIV. During follow-up, we observed that 90% of patients with Tg between 2 and 10 had evidence of residual TC, and 100% with Tg > 10 ng/ml, whereas 18% of those whose stimulated Tg

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9

Metástasis poco habituales del carcinoma diferenciado de tiroides/ Less common sites of metastases in differentiated thyroid cancer

Ferrer García, J. C.; Merino Torres, J. F.; Ponce Marco, J. L.; Piñón Sellés, F.
2002-11-01

Resumen en español El carcinoma diferenciado de tiroides metastatiza fundamentalmente en pulmón y hueso, y con menos frecuencia en cerebro, hígado y piel. Se describen las características clínicas, terapéuticas e histológicas del tumor primario en tres casos de metástasis de carcinoma diferenciado de tiroides en lugares poco habituales. En dos de los casos se trataba de un carcinoma folicular, el primero presentó una metástasis en glándula suprarrenal derecha y el segundo en riñ� (mas) �n izquierdo. En los dos casos, inicialmente, sólo se realizó una hemitiroidectomía sin tratamiento posterior con I131, y en uno de ellos no se trataron cifras elevadas de tiroglobulina en el seguimiento por ser los rastreos con I131 negativos. En el tercer caso el diagnóstico anatomopatológico inicial fue de carcinoma papilar, procediéndose a tiroidectomía total más ablación de restos con I131 y tratamiento supresor con levotiroxina, sin embargo, la evolución posterior fue desfavorable presentando metástasis en lugares típicos y atípicos como fue en coroides. La revisión de la pieza histológica del último caso reveló una variedad de células altas del carcinoma papilar de tiroides. En conclusión, ante un carcinoma diferenciado de tiroides cuyo tratamiento inicial no haya sido el correcto, es posible encontrar metástasis en los lugares habituales y también en otros más infrecuentes. Determinadas variedades del carcinoma papilar de tiroides como es la de células altas, presentan un comportamiento especialmente agresivo y pueden metastatizar en lugares poco habituales. Resumen en inglés Distant metastases of differentiated thyroid cancer are usually localised in the lung and bone; less common sites of metastases are the brain, liver, and skin. To find it in other sites it is exceptional. This work shows the clinical, histologycal and therapeutical characteristic of primary tumour in three cases of non-typical distant metastases of differentiated thyroid cancer. Follicular thyroid carcinoma was displayed in two cases, the first presented one metastases in (mas) right adrenal gland and the second in left kidney. Both cases were initially treated only with hemithyroidectomy, without posterior radioiodine. In one case, elevated serum thyroglobulin did not receive radioiodine treatment because Whole-Body Scintigraphy was negative. The thirst case was a papillary thyroid carcinoma treated with total thyroidectomy, ablative radioiodine and suppressor therapy with levothyroxine. However, posterior evolution was unfavourable and tumour presented metastases in common and less common sites like choroid. Histologycal study showed tall cell variant of papillary thyroid carcinoma. In summary, when the initial treatment of well-differentiated thyroid carcinoma it is inaccurate, it is possible to find common and less common sites metastases. Some variants of papillary thyroid carcinoma, like tall cell, have a worse prognosis and they can present metastases in less common sites.

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10

La tiroides como modelo de mecanismos moleculares en enfermedades genéticas/ The thyroid as a model for molecular mechanisms in genetic diseases

Rivolta, Carina M.; Moya, Christian M.; Esperante, Sebastián A.; Gutnisky, Viviana J.; Varela, Viviana; Targovnik, Héctor M.
2005-06-01

Resumen en español Las enfermedades tiroideas constituyen una heterogénea colección de anormalidades asociadas a mutaciones en los genes responsables en el desarrollo de la tiroides: factor de transcripción tiroideo 1 (TTF-1), factor de transcripción tiroideo 2 (TTF-2) y PAX8, o en uno de los genes que codifican para las proteínas involucradas en la biosíntesis de hormonas tiroideas como tiroglobulina (TG), tiroperoxidasa (TPO), sistema de generación de peróxido de hidrógeno (DUOX2 (mas) ), cotransportdor de Na/I- (NIS), pendrina (PDS), TSH y receptor de TSH. El hipotiroidismo congénito ocurre con una prevalencia de 1 en 4.000 nacidos. Los pacientes con este síndrome pueden ser divididos en dos grupos: con hipotiroidismo congénito sin bocio (disembriogénesis) o con bocio (dishormonogénesis). El grupo de disembriogénesis, que corresponde al 85% de los casos, resulta de ectopía, agenesia o hipoplasia. En una minoría de estos pacientes, el hipotiroidismo congénito está asociado con mutaciones en los genes TTF-1, TTF-2, PAX-8, TSH o TSHr. La presencia de bocio congénito (15% de los casos) se ha asociado a mutaciones en los genes NIS, TG, TPO, DUOX2 o PDS. El hipotiroidismo congénito por dishormonogénesis es trasmitido en forma autonómica recesiva. Mutaciones somáticas en el TSHr han sido identificadas en adenomas tiroideos hiperfuncionantes. Otra enfermedad tiroidea bien establecida es la resistencia a hormonas tiroideas (RTH). Es un síndrome de reducida respuesta tisular a la acción hormonal causado por mutaciones localizadas en el gen del receptor b de hormonas tiroideas (TRb). Mutantes de TRb interfieren con la función del receptor normal por un mecanismo de dominancia negativa. En conclusión, la identificación de mutaciones en los genes de expresión tiroidea ha permitido un mayor entendimiento sobre la relación estructura-función de los mismos. La tiroides constituye un excelente modelo para el estudio molecular de las enfermedades genéticas. Resumen en inglés Thyroid diseases constitute a heterogeneous collection of abnormalities associated with mutations in genes responsible for the development of thyroid: thyroid transcription factor-1 (TTF-1), thyroid transcriptions factor-2 (TTF-2) and PAX8, or in one of the genes coding for the proteins involved in thyroid hormone biosynthesis such as thyroglobulin (TG), thyroperoxidase (TPO), hydrogen peroxide-generating system (DUOX2), sodium/iodide symporter (NIS), pendrin (PDS), TSH a (mas) nd TSH receptor (TSHr). Congenital hypothyroidism occurs with a prevalence of 1 in 4000 newborns. Patients with this syndrome can be divided into two groups: nongoitrous (dysem/bryogenesis) or goitrous (dyshormonogenesis) congenital hypothyroidism. The dysembryogenesis group, which accounts for 85% of the cases, results from ectopy, agenesis and hypoplasia. In a minority of these patients, the congenital hypothyroidism is associated with mutations in TTF-1, TTF-2, PAX-8, TSH or TSHr genes. The presence of congenital goiter (15% of the cases) has been linked to mutations in the NIS, TG, TPO, DUOX2 or PDS genes. The congenital hypothyroidism with dyshormonogenesis is transmitted as an autosomal recessive trait. Somatic mutations of the TSHr have been identified in hyperfunctioning thyroid adenomas. Another established thyroid disease is the resistance to thyroid hormone (RTH). It is a syndrome of reduced tissue responsiveness to hormonal action caused by mutations located in the thyroid hormone receptor b (TRb) gene. Mutant TRbs interfere with the function of the wild-type receptor by a dominant negative mechanism. In conclusion, the identification of mutations in the thyroid expression genes has provided important insights into structure-function relationships. The thyroid constitutes an excellent model for the molecular study of genetic diseases.

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11

Thyroglobulin peptides associate in vivo to HLA-DR in autoimmune thyroid glands

Muixí, Laia; Carrascal, Montserrat; Alvarez, Iñaki; Daura, Xavier; Martí, Mercè; Armengol, Maria Pilar; Pinilla, Clemencia; Abián, Joaquín; Pujol-Borrell, Ricardo; Jaraquemada, Dolores
2008-07-01

Digital.CSIC (Spain)

12

The expression of the sodium/iodide symporter is up-regulated in the thyroid of fetuses of iodine-deficient rats

Schröder-Van der Elst, Janny P.; Van der Heide, Daan; Kastelijn, Jan; Rousset, Bernard; Obregón, María Jesús
2001-09-01

Digital.CSIC (Spain)

13

RhoA activation promotes transformation and loss of thyroid cell differentiation interfering with thyroid transcription factor-1 activity

Medina, Diego L.; Rivas, Marcos; Cruz, Patricia; Barroso, Isabel; Regadera, Javier; Santisteban, Pilar
2002-01-01

Digital.CSIC (Spain)

14

Neonatal hypothyroxinemia: effects of iodine intake and premature birth

Ares, Susana; Escobar-Morreale, Héctor F.; Quero, José; Durán, Socorro; Presas, María Jesús; Herruzo, Rafael; Morreale de Escobar, Gabriella
1997-06-01

Digital.CSIC (Spain)

15

Inadequate iodine nutrition of pregnant women from Extremadura (Spain)

Sánchez-Vega, Javier; Escobar del Rey, Francisco; Fariñas-Seijas, Humberto; Morreale de Escobar, Gabriella
2008-10-01

Digital.CSIC (Spain)

16

Ha-ras interference with thyroid cell differentiation is associated with a down-regulation of thyroid transcription factor-1 phosphorylation

Velasco, Juan A.; Acebrón, Alvaro; Zannini, Mariastella; Martín-Pérez, Jorge; Di Lauro, Roberto; Santisteban, Pilar
1998-06-01

Digital.CSIC (Spain)

17

Functional Study of a Novel Single Deletion in the TITF1/NKX2.1 Homeobox Gene That Produces Congenital Hypothyroidism and Benign Chorea But Not Pulmonary Distress

Moya, Christian M.; Nanclares, Guiomar Perez; Castaño, Luis; Potau, Neus; Bilbao, J. Ramón; Carrascosa, Antonio; Bargadá, María; Coya, Raquel; Martul, Pedro; Vicens-Calvet, Enric; Santisteban, Pilar
2006-05-01

Digital.CSIC (Spain)

19

Congenital human thyroglobulin defect due to low expression of the thyroid-specific transcription factor TTF-1

Acebrón, Alvaro; Aza-Blanc, Pedro; Rossi, Dévora L.; Lamas, Luis; Santisteban, Pilar
1995-08-01

Digital.CSIC (Spain)

20

Bacterial lipopolysaccharide stimulates the thyrotropin-dependent thyroglobulin gene expression at the transcriptional level by involving the transcription factors thyroid transcription factor-1 and paired box domain transcription factor 8

Vélez, María L.; Costamagna, Eugenia; Kimura, Edna T.; Fozzatti, Laura; Pellizas, Claudia G.; Montesinos, María M.; Lucero, Ariel M.; Coleoni, Aldo H.; Santisteban, Pilar; Masini-Repiso, Ana M.
2006-07-01

Digital.CSIC (Spain)

21

Alta prevalencia de enfermedad tiroidea subclínica en sujetos que concurren a control de salud/ High prevalence of subclinical thyroidal disease among individuals attended in occupational health examinations

Fardella B, Carlos; Poggi M, Helena; Gloger K, Sergio; Rojas O, Auristela; Velásquez A, Carmen Gloria; Barroileth D, Sergio; Figueroa R, Roberto; Alvarez B, Cecilia; Salgado M, Carolina; Gajardo J, Carlos; Foradori C, Arnaldo; Montero L, Joaquín
2001-02-01

Resumen en inglés Background: There is no information about the prevalence of thyroidal diseases in the general Chilean population. Aim: To assess the prevalence of thyroidal diseases in individuals attended in occupational health examinations. Subjects and methods: Four hundred seventy two individuals were examined between 1998 and 1999. In all, serum levels of thyroid hormones, TSH and anti thyroidal antibodies (anti microsomal, anti thyroid peroxidase and anti thyroglobulin) were measur (mas) ed. Results: Forty four subjects were excluded from the study due to an incomplete medical record and 18 due to a personal history of thyroidal disease. Abnormal serum levels of thyroid hormones or TSH were detected in 28 subjects (6.8%). Four (1%) had hypothyroidism, 23 a subclinical hypothyroidism (5.6%) and one (0.2%) had hyperthyroidism. In 87 subjects (21.2%) at least one of the antibodies was positive. Positive anti thyroid antibodies were found in 14 of 28 subjects (50%) with abnormal thyroid hormone levels, compared with 73 of 382 subjects (19.1%) with normal thyroid hormone levels. Thyroid dysfunction was twice as frequent in women than in men. Conclusions: In this sample, a 6.8% prevalence of abnormal thyroid function tests was detected. (Rev Méd Chile 2001; 129: 155-60)

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