WorldWideScience

Sample records for anticuerpos igg contra

  1. Obtención de anticuerpos monoclonales de ratón contra proteasa de cisteína 5 recombinante de Entamoeba histolytica

    Directory of Open Access Journals (Sweden)

    Juanita Trejos S.

    2012-08-01

    Full Text Available Objetivo. Obtener anticuerpos monoclonales de ratón contra la proteasas de cisteína 5 (EhCP5 de Entamoeba histolytica. Materiales y métodos. Se inmunizaron ratones BALB/c por vía intraperitoneal con adyuvante de Freund completo e incompleto con la proteína recombinante EhCP5 obtenida a partir del cultivo de E.coli DH5α trasfectada con el vector recombinante pJC45 que expresa dicha proteína. Se seleccionó el animal con mejor respuesta de anticuerpos. Al cual se le extrajo su bazo como fuente de linfocitos B, los cuales se fusionaron utilizando PEG con células de mieloma de ratón SP2-0/Ag14. Se procedió a selección de los hibridomas y a la evaluación de los sobrenadantes de las colonias que crecieron a los 7 días mediante ELISA. Los hibridomas con valores más altos de anticuerpos específicos contra la proteína EhCP5r se seleccionaron, y los clones obtenidos por diluciones limitantes fueron expandidos. Resultados. A partir de un clon secretor estable se purifico el anticuerpo monoclonal anti EhCP5r del isotipo IgG1 por cromatografía de afinidad con proteína G. Los clones fueron expandidos in vivo e in vitro. Con el anticuerpo purificado se diseñaron tres sistemas de captura para evaluar la aplicabilidad del anticuerpo monoclonal anti EhCP5r como método inmunodiagnóstico. Conclusiones. Se logro la producción de un anticuerpo monoclonal específico contra EhCP5r que permite diferenciar Entamoeba histolytica de Entamoeba dispar.

  2. Papel de los anticuerpos en la protección contra micobacterium tuberculosis

    Directory of Open Access Journals (Sweden)

    Nesty Olivares

    2006-12-01

    Full Text Available Convencionalmente se asume que la defensa del hospedero contra Mycobacterium tuberculosis se basa en los mecanismos de inmunidad celular exclusivamente y se descarta el papel de los anticuerpos en la protección. En este trabajo se analizan evidencias recientes que retan este dogma y sugieren la importancia de considerar la manipulación de la respuesta inmune humoral como una alternativa en la investigación de vacunas contra la tuberculosis.

  3. Prevalencia de anticuerpos contra Leptospira en personas asintomáticos y en perros de Chancay, Lima 2001

    Directory of Open Access Journals (Sweden)

    Manuel Céspedes

    2007-10-01

    Full Text Available Objetivos. Determinar la prevalencia de anticuerpos contra Leptospiras en personas asintomáticas dedicadas a la agricultura, pesca y comercio y en perros domésticos de localidades de Chancay (Huaral, Lima. Material y métodos. Estudio transversal analítico, se tomó muestras de suero de 268 pobladores de tres localidades, en quienes se evaluó la presencia de anticuerpos totales contra Leptospiras por el método de ELISA IgG y la prueba de microaglutinación (MAT. Se buscaron los factores asociados con la positividad a Leptospiras calculando el OR con su intervalo de confianza al 95%. De la misma manera, se tomó muestras de suero de 241 perros a los que se realizó la prueba de MAT. Resultados. La prevalencia de anticuerpos contra Leptospira en población asintomática fue de 10,1% (IC95%: 6,3-13,9, la cual estuvo asociada con el abastecimiento de agua para consumo en quebrada o pozo (OR: 3,48, IC95%: 1,39-8,74, con el antecedente de nadar en el río o acequia (OR: 4,75, IC95%: 1,51-14,92 y con tener una edad entre 21-40 años (OR: 2,47, IC95%: 1,10-5,52. Los serovares más frecuentes fueron Icterohaemorrhagiae y Canicola según MAT. En canes, 27,8% (67/241 tuvieron serología positiva a leptospiras. Conclusiones. Existe una mediana prevalencia de serología positiva para Leptospiras en la población general asintomática y condiciones favorables para la presencia de Leptospiras en las localidades estudiadas. En estas zonas se recomienda realizar actividades educativas preventivas frecuentes, tomando en cuenta los resultados de este estudio y el personal de salud debe sospechar de la leptospirosis como una causa de enfermedad febril.

  4. Prevalencia de anticuerpos contra dengue y leptospira en la población de Jáltipan, Veracruz Prevalence of dengue and leptospira antibodies in the state of Veracruz, Mexico

    OpenAIRE

    Joel Navarrete-Espinosa; Juan Antonio Acevedo-Vales; Emilia Huerta-Hernández; Jorge Torres-Barranca; Dolores Guadalupe Gavaldón-Rosas

    2006-01-01

    OBJETIVO: Conocer la prevalencia de anticuerpos contra dengue y leptospira en Jáltipan, Veracruz, México MATERIAL Y MÉTODOS: Estudio transversal en 500 habitantes de Jáltipan, Veracruz, mediante un muestreo por hogares, aplicación de cuestionario y toma de muestras sanguíneas. Se buscaron anticuerpos IgG y se evaluaron factores asociados a sus seroprevalencias mediante regresión logística RESULTADOS: La seroprevalencia global para denguevirus fue 79.6% (IC95% 76-81); los principales factores ...

  5. Diagnóstico diferencial en la encefalitis por anticuerpos contra el receptor NMDA

    Science.gov (United States)

    González-Valcárcel, J.; Rosenfeld, M.R.; Dalmau, J.

    2011-01-01

    Resumen Introducción La encefalitis por anticuerpos contra el receptor de NMDA (NMDAR) suele desarrollarse como un síndrome característico de evolución multifásica y diagnóstico diferencial amplio. Pacientes Presentamos a 2 pacientes diagnosticadas de encefalitis por anticuerpos NMDAR con un cuadro clínico típico, pero que inicialmente señaló otras etiologías. Discusión La afectación frecuente de pacientes jóvenes con manifestaciones psiquiátricas prominentes indica frecuentemente otras consideraciones diagnósticas; las más frecuentes son las encefalitis virales, los procesos psiquiátricos y el síndrome neuroléptico maligno. Varios síndromes previamente definidos de manera parcial o descriptiva en adultos y pacientes pediátricos probablemente eran casos de encefalitis anti-NMDAR. Conclusiones La encefalitis anti-NMDAR debe considerarse en pacientes jóvenes con manifestaciones psiquiátricas subagudas, movimientos anormales y alteraciones autonómicas. La caracterización clínica e inmunológica de esta enfermedad ha llevado a la identificación de nuevos anticuerpos que afectan a procesos de memoria, aprendizaje, conducta y psicosis. PMID:20964986

  6. Anticuerpos séricos contra la enfermedad de Newcastle e Influenza Aviar en aves rapaces de Chile.

    Directory of Open Access Journals (Sweden)

    Daniel González-Acuña

    2012-12-01

    Full Text Available Objetivo. Detectar la presencia de anticuerpos séricos sanguíneos contra los virus de la Enfermedad de Newcastle (ENC e Influenza aviar (IA, para comprender la contribución de las aves silvestres en la transmisión de estos virus en Chile. Materiales y métodos. Se analizaron 63 aves pertenecientes a los órdenes Falconiformes y Strigiformes desde centros de rehabilitación de aves de las zonas central y sur de Chile. Se realizaron las pruebas de inhibición de la hemoaglutinación (IHA para detectar anticuerpos contra el virus ENC e inmunodifusión en gel agar (IDGA y ELISA para IA. Resultados. Se detectaron 14 aves positivas (22.2% para anticuerpos séricos contra el virus de la ENC. En cambio, no se registraron anticuerpos séricos sanguíneos para el virus de la IA. Conclusiones. La presencia de aves rapaces positivas en los centros de rescate a los anticuerpos séricos contra el virus de la ENC puede ser explicada por el consumo de carne de pollos que han sido vacunados contra ENC o consumo de aves que han adquirido directamente el virus vacunal a través de los distintos procedimientos de administración (aerosoles, bebederos de la vacuna o por el ingreso a los centros de rescate de aves rapaces migratorias, las que podrían facilitar la diseminación de la infección desde los países de origen, hecho que debe ser investigado.

  7. Determinación de las condiciones de ensayo óptimas en un ELISA para la detección de anticuerpos séricos IgG anti-LPS de Pseudomonas aeruginosa O11

    OpenAIRE

    Tania Valmaseda; Lázaro Alba; Rolando Ochoa; Aniel Moya; Yadira Pino; Sara Catalina Esnard

    2004-01-01

    La selección de sueros de donantes sanos para la obtención de una gamma hiperinmune contra la infección por Pseudomona aeruginosa, así como la evaluación de la respuesta inmunológica de cualquier candidato vacunal contra este microorganismo necesita contar en el laboratorio con técnicas estandarizadas. En este trabajo se realizaron los ensayos necesarios para el montaje y la optimización de un ELISA indirecto para la determinación de anticuerpos séricos de clase IgG anti- LPS de P. aeruginosa...

  8. Anticuerpos monoclonales contra la Gonadotropina Corionica Humana (HCG) y su empleo en el diagnóstico precoz del embarazo.

    OpenAIRE

    Torres E.; N. Pentón; Blanco, R; ABAD N.; A. Triguero; L. Sorell; J. Gavilondo

    2006-01-01

    Se describe la obtención y caracterización de anticuerpos monoclonales contra la hormona gonadotropina cariónica humana (HCG), seleccionados de la inmunización subcutánea en ratones BALB/c. Se reporta también el desarrollo del sistema rápido HeberFast Line® Embarazo, para la detección de la hormona en muestras de orina, basado en los anticuerpos obtenidos y la tecnología del flujo lateral desarrollada en membranas de nitrocelulosa como soporte sólido. El nivel de sensibilidad alcanzado con es...

  9. Detección de anticuerpos contra lentivirus de pequeños rumiantes en fetos ovinos y caprinos

    Directory of Open Access Journals (Sweden)

    Gerardo Arcila López

    2012-01-01

    Full Text Available Se evaluó la presencia de anticuerpos contra los virus del Maedi-Visna (MV y la artritis encefalitis caprina (AEC en fetos ovinos y caprinos obtenidos de hembras gestantes sacrificadas para consumo en México. Se recolectaron sueros de 54 fetos caprinos y 65 fetos ovinos que se evaluaron mediante ELISA indirecto. Se detectaron anticuerpos en cinco fetos caprinos de 80 días de gestación y en cuatro fetos ovinos de 90 a 100 días; tres fetos caprinos y dos ovinos de 60 a 65 días de gestación resultaron sospechosos. Se confirma la posibilidad de la infección uterina por estos retrovirus y se discuten sus consecuencias en las actuales estrategias de control y erradicación de las enfermedades.

  10. Prevalencia de anticuerpos contra Brucella sp. En donantes del banco de sangre de un hospital de Lima

    OpenAIRE

    Abel Ortega; José Paredes; Alfredo Guillén

    2007-01-01

    El Perú es un país endémico de Brucelosis, por lo que existe el riesgo de transmisión a través de sangre donada por no ser parte del tamizaje regular que realizan los bancos de sangre. Para conocer la prevalencia de anticuerpos contra Brucella en donantes del banco de sangre del Hospital Edgardo Rebagliati Martins, se analizó 1003 muestras de suero. La prueba tamiz fue Rosa de Bengala (RB); las muestras positivas fueron evaluadas por las pruebas de aglutinación en tubo (AT) y 2-Mercaptoetanol...

  11. Prevalencia de anticuerpos contra Trypanosoma cruzi en donadores de sangre del IMSS, Orizaba, Veracruz, México

    OpenAIRE

    Ramos-Ligonio Angel; Ramírez-Sánchez Michaía Elián; González-Hernández Juan Carlos; Rosales-Encina José Luis; López-Monteon Aracely

    2006-01-01

    OBJETIVO: Determinar la prevalencia de anticuerpos contra Trypanosoma cruzi en donadores del Hospital General Regional del Instituto Mexicano del Seguro Social (IMSS) en la ciudad de Orizaba, Veracruz. MATERIAL Y MÉTODOS: Se examinaron muestras de donadores del banco de sangre del Hospital General Regional (HGRO) del IMSS para la búsqueda de antiT. cruzi por ELISA, Western blot e IFI, utilizando una proteína recombinante (MBP::Hsp70) y un extracto crudo de epimastigotes. Las muestras fueron o...

  12. Prevalencia de anticuerpos contra Brucella sp. En donantes del banco de sangre de un hospital de Lima

    Directory of Open Access Journals (Sweden)

    Abel Ortega

    2007-10-01

    Full Text Available El Perú es un país endémico de Brucelosis, por lo que existe el riesgo de transmisión a través de sangre donada por no ser parte del tamizaje regular que realizan los bancos de sangre. Para conocer la prevalencia de anticuerpos contra Brucella en donantes del banco de sangre del Hospital Edgardo Rebagliati Martins, se analizó 1003 muestras de suero. La prueba tamiz fue Rosa de Bengala (RB; las muestras positivas fueron evaluadas por las pruebas de aglutinación en tubo (AT y 2-Mercaptoetanol (2-ME. Dos donantes fueron positivos a RB, confirmados por AT y 2-ME, se encontró una prevalencia de 0,20% (IC99%: 0,01-0,92. Se demostró la presencia de donantes portadores de anticuerpos contra Brucella con posible Brucelosis activa, evidenciándose la posibilidad de transmisión de esta infección. Se debe realizar mayores estudios con la finalidad de conocer la realidad de otros bancos de sangre.

  13. Evaluación de la respuesta de anticuerpos hacia antígenos de Pseudomonas aeruginosa.

    OpenAIRE

    Aniel Moya; Adriana Callicó; Bárbara Cedré; Frank Camacho; Alexei Simón; Juan Almenares; Tania Valmaseda; Alina Ocanto; Armando Cádiz; Sara C. Esnard

    2007-01-01

    Pseudomonas aeruginosa es un patógeno extracelular que genera una respuesta de anticuerpos específicos con utilidad para el diagnóstico y vacunas. En el presente estudio nos propusimos evaluar en suero humano los niveles de anticuerpos contra antígenos relevantes de P. aeruginosa. Realizamos la determinación de anticuerpos IgG contra tres exoenzimas, consideradas como factores de virulencia de mayor importancia en infecciones. Este resultado dio paso a la evaluación del reconocimiento de IgG ...

  14. Uso de anticuerpos contra proteínas extracelulares de bacterias de la microbiota intestinal como biomarcadores de Enfermedad Inflamatoria Intestinal

    OpenAIRE

    Hevia González, Arancha

    2012-01-01

    En este trabajo se pretende utilizar los niveles de anticuerpos dirigidos contra bacterias ingeridas con los alimentos, representantes de la microbiota intestinal, como posibles biomarcadores para uso en la Enfermedad Inflamatoria Intestinal con el fin de facilitar el desarrollo de mejores métodos de diagnóstico precoz.

  15. Anticuerpos monoclonales contra la Gonadotropina Corionica Humana (HCG y su empleo en el diagnóstico precoz del embarazo.

    Directory of Open Access Journals (Sweden)

    Torres E

    2006-03-01

    Full Text Available Se describe la obtención y caracterización de anticuerpos monoclonales contra la hormona gonadotropina cariónica humana (HCG, seleccionados de la inmunización subcutánea en ratones BALB/c. Se reporta también el desarrollo del sistema rápido HeberFast Line® Embarazo, para la detección de la hormona en muestras de orina, basado en los anticuerpos obtenidos y la tecnología del flujo lateral desarrollada en membranas de nitrocelulosa como soporte sólido. El nivel de sensibilidad alcanzado con este sistema diagnóstico es de 20 UI/L de HCG en muestra de orina, y no se observó reactividad cruzada en analitos similares conteniendo concentraciones de las glicohormonas relacionadas; 1000 IU de LH, 5000 IU de FSH, y 1000 µIU de TSH respectivamente. Los estudios de estabilidad arrojaron, que el diagnosticador mantine las características de funcionalidad por un tiempo de 15 meses a temperaturas entre 2 y 30 ºC, conformando este el tiempo de vigencia del sistema. De poseer en Farmacias, Consultorios Médicos de la Familia y Hospital Gineco-Obstétricos, un sistema rápido y sencillo como el establecido en este trabajo, se pueden evitar todos los riesgos e inconvenientes que acarrean los procesos de interrupción del embarazo en la mujer.

  16. Evaluación de anticuerpos contra enfermedades prevenibles por vacunas en el binomio madre–recién nacido en hospitales de Ciudad de La Habana

    OpenAIRE

    2007-01-01

    El sistema inmune es inmaduro en los recién nacidos, lo que los hace susceptibles a las enfermedades infecciosas, sin embargo, pueden ser parcialmente protegidos por los anticuerpos adquiridos a través de la placenta. Por ello, nos propusimos evaluar la transferencia transplacentaria de anticuerpos contra algunas enfermedades prevenibles por vacunas. Se realizó un ensayo prospectivo, aleatorio, en el binomio madre–recién nacido. Para ello se analizó un total de 96 pares de muestras de suero, ...

  17. Estudio del perfil de anticuerpos contra Helicobacter pylori producidos por pacientes con diferentes patologías gastroduodenales

    Directory of Open Access Journals (Sweden)

    Spinel Clara

    2004-12-01

    Full Text Available La colonización de la mucosa gástrica con Helicobacter pylori causa la infección bacteriana más frecuente a nivel mundial que es la mayor causa de enfermedades gastrointestinales en humanos. Con el objetivo de examinar el reconocimiento de antígenos de dos cepas de la bacteria en
    150 pacientes infectados y con inflamación (30 de gastritis crónica no atrófica G, úlcera duodenal (30 UD, patologías preneoplásicas (30 de gastritis atrófica GA y 30 de metaplasia intestinal MI y adenocarcinoma gástrico (30 C, se realizó un sistema de cultivo de Helicobacter pylori
    con células epiteliales gástricas. Los sobrenadantes de estos cocultivos fueron empleados como preparación antigénica en pruebas de inmunotransferencia, en las que se detectaron los anticuerpos
    IgG totales, al igual que sus cuatro subclases (IgG1, IgG2, IgG23, IgG4 en los sueros de los pacientes. Se encontró que los perfiles antigénicos de las dos cepas de Helicobacter pylori, aisladas de un paciente con úlcera duodenal y uno con adenocarcinoma gástrico, eran semejantes, con 23 proteínas comunes que incluían los principales factores de virulencia de la bacteria (CagA, VacA, Ureasa, Flagelina. Aunque los sueros mostraron un reconocimiento variado de cada uno de los antígenos, no se encontraron diferencias entre el número de antígenos reconocidos según la patología ni la cepa, tanto para las IgG totales (p = 0,98, como cada una de las subclases (IgG1:p = 0,97; IgG2: p = 0,72; IgG3: p = 0,61; IgG4: p = 0,84. Con el fin de analizar simultáneamente la respuesta de los pacientes hacia el total de los 23 antígenos, se aplicaron análisis multivariados gracias a los cuales se distinguieron cuatro proteínas, de 70,
    82, 90 kDa y VacA de 86 kDa como los principales antígenos implicados en la respuesta inmune de las personas infectadas. Adicionalmente, se diferenciaron dos grupos de patologías según el reconocimiento del conjunto de antígenos: por

  18. Prevalencia de anticuerpos contra virus dengue en el cantón de Golfito (2005 y en el Distrito Central de Puntarenas (2005-2006, Costa Rica

    Directory of Open Access Journals (Sweden)

    Margarita Lee-Lui

    2008-09-01

    Full Text Available Justificación y objetivo: La primo infección con el virus dengue varía desde asintomática hasta cuadros muy severos, como el dengue hemorrágico o el síndrome de choque por dengue. El Distrito Primero de Puntarenas ha sido una de las poblaciones más afectadas desde 1993, cuando aparecieron los primeros brotes, hasta hoy, con una disminución de la incidencia en los últimos años. La región Brunca fue la segunda en incidencia en el país en 1998, y si bien la endemicidad se ha mantenido, no existen estudios epidemiológicos sobre la prevalencia de esta enfermedad; los datos que aporta el Ministerio de Salud corresponden a la incidencia de casos clínicos en un período determinado. El objetivo de este estudio fue determinar la seroprevalencia en el Distrito Primero de Puntarenas y en Golfito para conocer la vulnerabilidad de la población de sufrir fiebre hemorrágica por dengue y analizar la situación asociada a los datos epidemiológicos de estas regiones, tales como edad, sexo y ubicación geográfica, ya que una población susceptible es la que presenta una alta seroprevalencia, unida a condiciones de hacinamiento y alta densidad vectorial. Métodos: El muestreo se realizó con el método EPI descrito por la OMS. Se recolectaron 210 muestras de suero en cada distrito, se desarrolló y estandarizó una prueba de ELISA de captura de antígeno para la detección de anticuerpos tipo IgG contra dengue, usando como referencia el método de reducción de placas de Dulbecco considerado estándar de oro. Resultados: La seroprevalencia contra dengue fue del 43.8% (92 y del 90% (189 en los distritos de Golfito y Central de Puntarenas, respectivamente, sin diferencias significativas respecto al sexo, la edad y la localidad. Se obtuvo un 83% y un 95% de correlación en Golfito y Puntarenas, respectivamente, entre los casos sintomáticos y la serología con el método estandarizado. Un 32% y un 42% del total de seropositivos en cada localidad

  19. Producción de un anticuerpo IgY específico contra el antígeno CD41 humano

    Directory of Open Access Journals (Sweden)

    Esteban J. Gutiérrez Calzado

    2009-01-01

    Full Text Available Desde hace dos décadas, la comunidad científica muestra un gran interés hacia la generación de anticuerpos en gallinas ponedoras por las ventajas que estas aportan al compararse con otros métodos tradicionales para este fin, sobre todo, en el hecho de lograrse en ellas, mejores respuestas de anticuerpos hacia antígenos de mamíferos muy conservados en la filogenia entre los que se encuentran glicoproteínas de membrana celular. El objetivo de este trabajo fue la generación de anticuerpos específicos contra la glicoproteína de membrana plaquetaria humana gpIIb/IIIa (antígeno CD41 en gallinas ponedoras. Para este propósito, se utilizaron gallinas de 22 semanas de edad, a las que se les aplicaron dosis de 20 ¿g de una preparación inmunopurificada de este antígeno plaquetario, emulsionada con adyuvante completo e incompleto de Freund para una primera y segunda inmunización respectivamente, a intervalos de un mes. Se cosecharon los huevos diariamente de los animales inmunizados a partir de un día antes de esta aplicación hasta 30 d posteriores a la segunda inyección, se procesaron estos para la extracción de los anticuerpos específicos presentes en ellos y se obtuvo la dinámica de producción de anticuerpos por el método clásico de Ouchterlony que se enfrentó a una preparación pura del antígeno. Las respuestas de anticuerpos obtenidas resultaron en títulos adecuados susceptibles de investigar en usos posteriores en la Medicina Transfusional específicamente para el análisis de la calidad de plasmas.

  20. Prevalencia de anticuerpos contra Trypanosoma cruzi en donadores de sangre del IMSS, Orizaba, Veracruz, México

    Directory of Open Access Journals (Sweden)

    Ramos-Ligonio Angel

    2006-01-01

    Full Text Available OBJETIVO: Determinar la prevalencia de anticuerpos contra Trypanosoma cruzi en donadores del Hospital General Regional del Instituto Mexicano del Seguro Social (IMSS en la ciudad de Orizaba, Veracruz. MATERIAL Y MÉTODOS: Se examinaron muestras de donadores del banco de sangre del Hospital General Regional (HGRO del IMSS para la búsqueda de antiT. cruzi por ELISA, Western blot e IFI, utilizando una proteína recombinante (MBP::Hsp70 y un extracto crudo de epimastigotes. Las muestras fueron obtenidas entre los meses de octubre de 2001 a enero de 2002. RESULTADOS: Los 420 donadores de sangre analizados fueron seronegativos para HBV, HCV, BrA, VDRL y HIV. Después del tamizaje de los 420 donadores, se identificaron dos individuos seropositivos por las pruebas de ELISA, Western blot e IFI, con una seroprevalencia de 0.48%. CONCLUSIONES: En este estudio se muestran evidencias de seropositividad para T. cruzi en donadores de sangre del HGRO, lo que sugiere la existencia de riesgo de contaminación por transfusión sanguínea. Por tal motivo, es necesario aplicar programas para el tamizaje serológico a través de técnicas inmunológicas con alta sensibilidad y especificidad.

  1. Prevalencia de anticuerpos contra dengue y leptospira en la población de Jáltipan, Veracruz Prevalence of dengue and leptospira antibodies in the state of Veracruz, Mexico

    Directory of Open Access Journals (Sweden)

    Joel Navarrete-Espinosa

    2006-06-01

    Full Text Available OBJETIVO: Conocer la prevalencia de anticuerpos contra dengue y leptospira en Jáltipan, Veracruz, México MATERIAL Y MÉTODOS: Estudio transversal en 500 habitantes de Jáltipan, Veracruz, mediante un muestreo por hogares, aplicación de cuestionario y toma de muestras sanguíneas. Se buscaron anticuerpos IgG y se evaluaron factores asociados a sus seroprevalencias mediante regresión logística RESULTADOS: La seroprevalencia global para denguevirus fue 79.6% (IC95% 76-81; los principales factores vinculados con la infección fueron la edad (pOBJECTIVE: To discover the prevalence of antibodies against denguevirus and leptospira. MATERIAL AND METHODS: A cross-sectional study was carried out in 500 inhabitants of Veracruz, Mexico through household sampling, administration of a questionnaire and collection of blood samples. The presence of IgG antibodies was determined and factors associated with seroprevalence were evaluated using a logistic regression model. RESULTS: Total denguevirus seroprevalence was 79.6% (IC95% 76-81. The main factors associated with infection were age and residence in neighborhoods with higher vectorial indices (RMP=2.94, IC95% 1.46-6.1. Overall seroprevalence against leptospira was 4% (IC95% 2-6. Prevalence was higher in the 25 to 44 years age group (35%, IC95% 15-59. Seroprevalence in individuals who referred to living with dogs, pigs, cows and rats was 25% (IC95% 0.63-80. Eighty-five percent of individuals who were leptospira positive were also dengue positive. CONCLUSIONS: The prevalence of denguevirus antibodies suggests the risk of serious dengue hemorrhagic outbreaks. Although leptospirosis prevalence was low, the coexistence of both agents was confirmed.

  2. Presencia de anticuerpos sericos contra Neospora caninum en equinos en Chile Sera antibodies to Neospora caninum in Chilean horses

    Directory of Open Access Journals (Sweden)

    A.N. Patitucci

    2004-12-01

    Full Text Available Neospora sp. es un parásito protozoario causante de abortos y/o enfermedad del Sistema Nervioso Central (SNC en caninos, bovinos, ciervos, caprinos, ovinos, equinos y otros. En equinos, se lo ha involucrado como causa de aborto, mortalidad neonatal y enfermedades del SNC y viscerales. La especie que infecta a los equinos es distinta a Neospora caninum y se denomina Neospora hughesi. En Chile no existe evidencia de infección en equinos, sin embargo, la enfermedad ha sido informada en bovinos y caninos, por lo que el objetivo de este trabajo fue buscar anticuerpos contra la enfermedad en sueros equinos . Para ello se tomaron muestras de sangre a 145 equinos (87 de la IX Región y 58 de la VIII Región de Chile. Los sueros fueron analizados mediante Test de Aglutinación para Neospora (NAT. Cada suero se diluyó en 1:40 en solución salina tamponada (PBS pH 7.2 conteniendo 2- mercaptoetanol y fueron analizados en 1:40 y 1:80. Los sueros positivos a 1:80 fueron examinados a 1:160 y 1:320. Anticuerpos contra N.caninum (≥ 1:40 se encontraron en 32% (47/145 de los equinos estudiados. Debido a que N.caninum y N.hughesi dan reacción cruzada, ambos o uno de ellos podrían ser los responsables de la seropositividad. Estos resultados indican que equinos provenientes de la VIII y IX regiones de Chile son reaccionantes a la infección de Neospora, por lo que su diagnóstico presuntivo debería ser considerados ante la presencia de cuadros clínicos con sintomatología nerviosa y/o abortos en esta especie.Neospora caninum is a protozoan parasite that affects cattle and dogs, its infections seem to be widely prevalent in Chile. To date, nothing is known of the presence of N. caninum in horse population of the country. In South America, two seroprevalence studies have failed to find antibodies in Argentina and Brazil. The objective of the study was to investigate the presence of N. caninum exposure in horses of Chile. Sera from 145 asymptomatic horses (87

  3. Rabbit IgG antibodies against Phospholipase A2 from Crotalus durissus terrificus neutralize the lethal activity of the venom Los anticuerpos IgG de conejos anti-fosfolipasa A2 de Crotalus durissus terrificus neutralizan la actividad letal del veneno

    Directory of Open Access Journals (Sweden)

    Juan P. Rodríguez

    2006-12-01

    antisuero se analizó en ratones por inoculación con diluciones de veneno entero preincubado con un volumen adecuado de anticuerpos IgG anti-PLA2. Se inocularon ratones controles con 0.5 ml i.p. de veneno (4 µg.ml-1. El número de muertes fue contabilizado a las 24 y 48 h posteriores a la inoculación, demostrándose que la capacidad neutralizante de los anticuerpos IgG anti-PLA2 fue superior a la obtenida con el antiveneno crotálico. Los resultados obtenidos demuestran la potencial aplicación de antivenenos constituidos por anticuerpos específicos contra PLA2, y/o la inclusión de estos anticuerpos como suplementos en antivenenos polivalentes.

  4. Detección de anticuerpos contra Borrelia burgdorferi e identificación de garrapatas ixodidas en Piura Y Amazonas, Perú

    OpenAIRE

    Martha Glenny A; Leonardo Mendoza U; Eduardo Falconí R

    2004-01-01

    Objetivos: Detectar anticuerpos IgG/IgM contra Borrelia burgdorferi en población general, procedentes de los departamentos de Piura y Amazonas e identificar especies de garrapatas probablemente incriminadas en la transmisión de la enfermedad de Lyme. Material y Métodos: Entre agosto del año 2001 y junio de 2002, se colectaron muestras de sangre de 232 pobladores procedentes de ocho localidades del Departamento de Piura y 12 del Departamento de Amazonas, para evaluar mediante ELISA Captia™ Lym...

  5. Prevalencia de anticuerpos IgG al toxoide tetánico en trabajadores sanitarios

    Directory of Open Access Journals (Sweden)

    B. Pérez Bermúdez

    2014-09-01

    Full Text Available Introducción: En el año 2009 el Ministerio de Sanidad y Consumo de España publica una nueva guía para la vacunación de la Difteria y Tétanos. Existen discrepancias con los tiempos de inoculación de las dosis de recuerdo con otros países y sociedades médicas. Material y métodos: Estudio descriptivo. Las variables analizadas fueron: IgG-Toxoide Tetánico, tiempo última dosis de vacunación, dosis totales, edad, sexo, hospital, habito tabáquico e índice de masa corporal. Se construyó un modelo de Regresión Logística. Con el fin de determinar los puntos de corte más sensibles y específicos para las variables temporales (tiempo desde la última dosis y edad se calcularon las curvas R.O.C Resultados: Las variables, edad O,R= 17,56 (1,840 - 167,760, dosis de vacuna inoculadas al trabajador, O,R= 0,064 (0,006 - 0,908 y tiempo de la última dosis de vacunación, O,R= 1,03 (1,017 - 1,047, son las variables significativas en el análisis multivariante. Los puntos de cortes, para la edad son 54 años (Sensibilidad S= 0,72, Especificidad SP=0,77 y 15 años tras la última dosis años (S= 0,88, SP=0,86, por encima de este corte la probabilidad de no tener anticuerpos al Tétanos es alta. Conclusiones: Ante un trabajador que refiere o documenta que hace más de 15 años de la ultima dosis deberíamos plantearnos la revacunación, si además este trabajador refiere no tener más de 5 dosis inoculadas y tiene más de 54 años la revacunación sería muy recomendable.

  6. Detección de anticuerpos contra Borrelia burgdorferi e identificación de garrapatas ixodidas en Piura Y Amazonas, Perú

    Directory of Open Access Journals (Sweden)

    Martha Glenny A

    2004-01-01

    Full Text Available Objetivos: Detectar anticuerpos IgG/IgM contra Borrelia burgdorferi en población general, procedentes de los departamentos de Piura y Amazonas e identificar especies de garrapatas probablemente incriminadas en la transmisión de la enfermedad de Lyme. Material y Métodos: Entre agosto del año 2001 y junio de 2002, se colectaron muestras de sangre de 232 pobladores procedentes de ocho localidades del Departamento de Piura y 12 del Departamento de Amazonas, para evaluar mediante ELISA Captia™ Lyme IgG/IgM (Trinity biotech la presencia de anticuerpos contra Borrelia burgdorferi. Además, se colectaron garrapatas en animales domésticos por búsqueda directa. Resultados: Se detectó seropositividad en 9,9 % de los sueros evaluados. Asimismo, de 433 garrapatas colectadas se identificaron los géneros: Ixodes (5,5%, Amblyomma (18,0%, Rhipicephalus (23,5%, Anocentor (31,1% y Boophilus (21,7%. Conclusiones: Existen personas seropositivas por Borrelia en Piura y Amazonas, coincidiendo con los hallazgos realizados en Sapillica en el año 1992, además se detectó la presencia de garrapatas del género Ixodes en Piura.

  7. Determinación de las condiciones de ensayo óptimas en un ELISA para la detección de anticuerpos séricos IgG anti-LPS de Pseudomonas aeruginosa O11

    Directory of Open Access Journals (Sweden)

    Tania Valmaseda

    2004-12-01

    Full Text Available La selección de sueros de donantes sanos para la obtención de una gamma hiperinmune contra la infección por Pseudomona aeruginosa, así como la evaluación de la respuesta inmunológica de cualquier candidato vacunal contra este microorganismo necesita contar en el laboratorio con técnicas estandarizadas. En este trabajo se realizaron los ensayos necesarios para el montaje y la optimización de un ELISA indirecto para la determinación de anticuerpos séricos de clase IgG anti- LPS de P. aeruginosa O11. Se evaluaron la concentración de recubrimiento, condiciones de bloqueo, dilución de trabajo de las muestras a evaluar y del conjugado con el fin de seleccionar en cada caso las mejores respuestas para el control positivo, el control negativo y el blanco del ensayo. Una concentración de 1,5 μg/mL de LPS O11 en PBS toda la noche a 4 °C como recubrimiento, la necesidad de no incluir un paso adicional de bloqueo y el conjugado humano anti IgG-HRP diluido 1:3000, 1 h a 37 °C resultaron las variables óptimas para el ensayo. Por otra parte, se estableció el rango lineal de la curva del control positivo y se seleccionó la dilución de trabajo 1:100 para las muestras de sueros a evaluar.

  8. Cinética y capacidad neutralizante de los anticuerpos homólogos y heterólogos contra serotipos de virus dengue en relación con el intervalo entre las infecciones, la secuencia de infección, duración de la viremia y la amplificación dependiente de anticuerpos en infecciones primarias y secundarias

    OpenAIRE

    Alvarez Vera, Mayling

    2008-01-01

    Para sustentar el papel de la infección secundaria en la etiopatogenia del Dengue y Dengue Hemorrágico en epidemias por Dengue 2 y 3 y la influencia de la secuencia de infección e intervalo de tiempo sobre la sensibilización , evaluamos la presencia de anticuerpos específicos contra serotipos, la cinética de anticuerpos neutralizantes en sueros inmunes a Dengue 1 colectados 4 y 20 años después de la primoinfección, la amplificación dependiente de anticuerpos después de 20 años, la capacidad n...

  9. IgG antibodies to dengue in dry blood samples in filter paper.

    OpenAIRE

    Carmen Acosta; Regla Herrera; Pedro Almenarez; Susana Vázquez

    2003-01-01

    En este trabajo se presentan los resultados de la normalización del procedimiento de detección de anticuerpos IgG contra el virus dengue en muestras de sangre colectadas sobre papel de filtro. Las muestras se obtuvieron de 216 individuos que acudieron al banco de sangre de Marianao de los cuales 25 presentaron resultados con títulos superiores a 1:40 por la técnica de Inhibición de la Hemaglutinación. En todas las muestras se determinó la presencia de anticuerpos IgG contra el virus dengue me...

  10. Determinación de Anticuerpos IgM contra Virus dengue partir de sangre absorbida en papel filtro: Un método alternativo y sencillo

    Directory of Open Access Journals (Sweden)

    María García M

    2000-01-01

    Full Text Available Objetivo: Se propone como alternativa la obtención de muestras de sangre total en papel filtro, para la determinación de anticuerpos IgM contra dengue, por ser un método de recolección sencillo y no requerir de muchos cuidados en el envío al laboratorio. Materiales y métodos: De 100 pacientes con diagnóstico clínico de dengue clásico, se obtuvieron en forma simultánea, muestras de suero en tubos al vacío y de sangre total en papel filtro. Ambas muestras fueron evaluadas con el método serológico ELISA Captura de IgM a los 30 días de obtenida la muestra. Resultados: De las 100 muestras 25 fueron positivas y 75 negativas en suero, y 24 positivas y 74 negativas en papel filtro. Se obtuvo una concordancia por índice Kappa de 0,97, sensibilidad y especificidad de 96,0% y 98,0% respectivamente; el valor predictivo positivo fue 96,0%, y valor predictivo negativo fue 98,0%. Conclusión: Se evidencia muy buena sensibilidad, especificidad y concordancia en la determinación de IgM contra dengue, al utilizar papel filtro en la obtención de muestra de sangre.

  11. Hallazgos de anticuerpos contra Leptospira sp., serovariedades Panama, Lai, Australis, Shermani y Patoc, en un grupo de monos rhesus (Macaca mulatta) en condiciones de cautiverio Antibodies findings against Leptospira sp., of the serovars Panama, Lai, Australis, Shermani, and Patoc, in a group of rhesus monkeys (Macaca mulatta) in conditions of captivity

    OpenAIRE

    A Ibáñez-Contreras; B Hernández-Godínez; JI Torres- Barranca; P Meléndez-Vélez

    2010-01-01

    La leptospirosis ha emergido como una importante enfermedad infecciosa, lo que ha ocurrido en diferentes entornos desde urbanos hasta medios naturales; los portadores son animales salvajes o domésticos. El objetivo fue evaluar la presencia de anticuerpos contra Leptospira en monos rhesus en condiciones de bioterio. Se utilizaron 59 monos de diferentes etapas fisiológicas. Se determinaron anticuerpos contra Leptospira a partir de la prueba de aglutinación microscópica (TAM), utilizando como an...

  12. Anticuerpos contra Chlamydophilaen pacientes con infarto agudo del miocardio y riesgo coronario, y su relación con la muerte Antibodies against Chlamydophila in patients with acute myocardial infarction and coronary risk and their association with mortality

    Directory of Open Access Journals (Sweden)

    Guadalupe García-Elorriaga

    2005-06-01

    Full Text Available OBJETIVO: Determinar si los anticuerpos contra Chlamydophila pneumoniae en pacientes con infarto agudo del miocardio y factores de riesgo coronario se asocian con la muerte. MATERIAL Y MÉTODOS: Se hizo un estudio observacional, prospectivo, transversal y comparativo. Se incluyeron en el estudio 100 sujetos que, entre 1999 y 2000, estuvieron hospitalizados en la Unidad Coronaria del Hospital de Especialidades del Centro Médico La Raza, del Instituto Mexicano del Seguro Social. Se trataba de una muestra constituida por pacientes de ambos sexos, mayores de 18 años, con infarto agudo del miocardio y riesgo coronario. Mediante microinmunofluorescencia indirecta se identificaron anticuerpos contra Chlamydophila pneumoniae, Chlamydophila psitacii y Chlamydia trachomatis. De entre los 100 sujetos, se eligieron al azar 33, a quienes se les determinaron anticuerpos contra Chlamydophila, no sólo durante su estancia en el hospital, sino también al salir de éste y a los tres meses de haber sufrido el infarto agudo del miocardio. Se calcularon las medias y las desviaciones geométricas estándares para los títulos de anticuerpos contra Chlamydophila, y se determinó la razón de momios y el intervalo de confianza al 95% entre los factores de riesgo coronario y la muerte. RESULTADOS: Setenta por ciento de los pacientes de la muestra inicial presentaron anticuerpos contra Chlamydophila pneumoniae; no se identificaron anticuerpos contra Chlamydophila psitacii y Chlamydia trachomatis. No se observó una fuerza de asociación estadísticamente significativa con la muerte en pacientes con infarto agudo del miocardio y factores de riesgo coronario. De los 33 individuos de la submuestra, 25 presentaron anticuerpos contra Chlamydophila pneumoniae, y en 83% de estos últimos casos, se registró un descenso de dichos anticuerpos a los tres meses de haberse presentado el infarto agudo del miocardio. CONCLUSIONES: A pesar de que en pacientes con infarto agudo del

  13. Prevalencia de anticuerpos contra Trypanosoma cruzi en donadores de sangre del IMSS, Orizaba, Veracruz, México Prevalence of antibodies against Trypanossoma cruzi in blood bank donors from the IMSS General Hospital in Onizaba, Veracruz, Mexico

    OpenAIRE

    Angel Ramos-Ligonio; Michaía Elián Ramírez-Sánchez; Juan Carlos González-Hernández; José Luis Rosales-Encina; Aracely López-Monteon

    2006-01-01

    OBJETIVO: Determinar la prevalencia de anticuerpos contra Trypanosoma cruzi en donadores del Hospital General Regional del Instituto Mexicano del Seguro Social (IMSS) en la ciudad de Orizaba, Veracruz. MATERIAL Y MÉTODOS: Se examinaron muestras de donadores del banco de sangre del Hospital General Regional (HGRO) del IMSS para la búsqueda de antiT. cruzi por ELISA, Western blot e IFI, utilizando una proteína recombinante (MBP::Hsp70) y un extracto crudo de epimastigotes. Las muestras fueron o...

  14. Antisperm autoantibodies and infertility Anticuerpos antiespermatozoides e infertilidad

    Directory of Open Access Journals (Sweden)

    Jorge Eliécer Ossa Londoño

    1997-02-01

    Full Text Available Fourteen human infertile couples were studied along with seven fertile control couples in order to determine the presence of antisperm au. toantibodies and to correlate results with their clinical reproductive status, spermogram parameters and the quality of cervical mucus. Immunoglobulins of IgG and IgA isotypes were evaluated on spermatozoa by the direct immunobead technique and in serum and cervical mucus by the indirect method. The following differences were found: Nine of 14 male patients but only 1 of 7 male controls had IgG on spermatozoa (p= 0.042 and OR= 10.8. Seven out of 14 male patiens and 1 of 7 controls were positive for IgA on spermatozoa (p= 0.12. Infertile males had a higher frequency of abnormal spermogram parameters as compared to controls (p= 0.0029 and OR= 3.32. Interestingly, the presence of only IgG in serum appeared to be a "protective factor" against IgG on sperm; only one out of the 16 positive males contradicted this observation. Para determinar la presencia de anticuerpos antiespermatozoides y correlacionarla con la situación reproductiva, el espermograma y la calidad del moco cervical, se estudiaron 7 parejas sanas, con hijos, y 14 infértiles. Se determinaron por las técnicas directa e indirecta de inmunoesferas los anticuerpos de los isotipos IgG e IgA en espermatozoides, suero y moco cervical. En 9 de los 14 hombres infértiles y en 1 de los 7 fértiles se encontraron anticuerpos IgG en la superficie de los espermatozoides (p= 0.042 y una Razón de disparidad [RD] = 10.8 y 8 de éstos también tuvieron IgA en los espermatozoides. El número de pruebas alteradas en el espermograma de los hombres infértiles fue significativamente mayor (p= 0.0029 y RD = 3.32. Tanto en los hombres infértiles como en los fértiles la presencia de sólo IgG en el suero parece ser un "factor de protección" contra IgG en los espermatozoides; de los 16 hombres que presentaron anticuerpos, fuera en el suero o en los espermatozoides, s

  15. Producción de un anticuerpo IgY específico contra el antígeno CD41 humano

    OpenAIRE

    Esteban J. Gutiérrez Calzado; Marlene Toledano Heredia; Hans Bäumler; Rüdiger Schade

    2009-01-01

    Desde hace dos décadas, la comunidad científica muestra un gran interés hacia la generación de anticuerpos en gallinas ponedoras por las ventajas que estas aportan al compararse con otros métodos tradicionales para este fin, sobre todo, en el hecho de lograrse en ellas, mejores respuestas de anticuerpos hacia antígenos de mamíferos muy conservados en la filogenia entre los que se encuentran glicoproteínas de membrana celular. El objetivo de este trabajo fue la generación de anticuerpos especí...

  16. Seroprevalence of antibodies against rubella virus in pregnant women in Haiti Seroprevalencia de anticuerpos contra el virus de la rubéola en mujeres embarazadas de Haití

    Directory of Open Access Journals (Sweden)

    Olbeg Y. Désinor

    2004-03-01

    ó entre febrero y mayo de 2002. Se evaluó la presencia de anticuerpos de tipo IgG específicos contra la rubéola en 503 embarazadas mediante un inmunoensayo enzimático. Posteriormente se excluyó a 8 mujeres debido a que no sabían su edad. RESULTADOS: De las 495 participantes estudiadas, 471 (95,2% tenían seropositividad; solo 24 de ellas (4,8% mostraron seronegatividad (susceptibilidad. Se encontraron menos mujeres seronegativas entre las residentes de Puerto Príncipe (17 de 426, 4,0% que entre las residentes de zonas rurales (7 de 69, 10,1% (P = 0,02. En relación con la edad, 81 (16,4% de las 495 mujeres embarazadas estudiadas eran menores de 21 años. CONCLUSIONES: Con este estudio se da el primer paso hacia evaluar la prevalencia de la infección por el virus de la rubéola en mujeres haitianas y hacia el enfrentamiento de un problema de salud que todavía no ha sido reconocido en toda su magnitud: el síndrome de la rubéola congénita en Haití. Se recomienda emprender estudios adicionales con muestreos aleatorios que abarquen una fracción significativa de mujeres provenientes de zonas rurales.

  17. Anticorpos contra LDL-ox e síndrome coronariana aguda Anticuerpos contra LDL-ox y síndrome coronario agudo Antibodies against OxLDL and acute coronary syndrome

    Directory of Open Access Journals (Sweden)

    Ana Maria Brito Medeiros

    2010-07-01

    Full Text Available FUNDAMENTO: A oxidação da lipoproteína de baixa densidade (LDL-ox induz à formação de epítopos imunogênicos na molécula. A presença de autoanticorpos contra a LDL-ox tem sido demonstrada no soro de pacientes com doença arterial coronariana (DAC. Contudo, o papel desses autoanticorpos na fisiopatologia das síndromes coronarianas agudas (SCA e o seu significado clínico permanecem indefinidos. OBJETIVO: Avaliar a associação entre autoanticorpos contra a LDL-ox e SCA. MÉTODOS: Os títulos de imunoglobulina G autoanticorpos contra a LDL-ox por cobre (antiLDL-ox e contra o peptídeo sintético D derivado da apolipoproteína B (antipeptD foram determinados por ensaio imunoenzimático (ELISA em 90 pacientes, nas primeiras 12h de SCA (casos e em 90 pacientes com DAC crônica (controles. RESULTADOS: Os resultados mostraram que os títulos de antiLDL-ox foram significativamente mais elevados (p = 0,017 nos casos (0,40 ± 0,22, do que nos controles (0,33 ± 0,23. Por outro lado, os títulos de antipeptD foram significativamente menores (p FUNDAMENTO: La oxidación de la lipoproteína de baja densidad (LDL-ox induce a la formación de epítopos inmunogénicos en la molécula. La presencia de autoanticuerpos contra la LDL-ox ha sido demostrada en el suero de pacientes con enfermedad arterial coronaria (EAC. No obstante eso, el papel de esos autoanticuerpos en la fisiopatología de los síndromes coronarios agudos (SCA y su significado clínico permanecen indefinidos. OBJETIVO: Evaluar la asociación entre autoanticuerpos contra la LDL-ox y SCA. MÉTODOS: Los títulos de inmunoglobulina G autoanticuerpos contra la LDL-ox por cobre (antiLDL-ox y contra el péptido sintético D derivado de la apolipoproteína B (antipeptD fueron determinados por ensayo inmunoenzimático (ELISA en 90 pacientes, en las primeras 12h de SCA (casos y en 90 pacientes con EAC crónica (controles. RESULTADOS: Los resultados mostraron que los títulos de antiLDL-ox fueron

  18. Generación de anticuerpos monoclonales contra el antígeno específico de próstata (psa)para la detección del psa y su purificación

    OpenAIRE

    Acevedo Castro, Boris Ernesto

    2012-01-01

    El cáncer de próstata en Cuba es un problema de salud (2 672 casos diagnosticados y 2 769 defunciones en el 2007). Varios métodos diagnósticos se han implementado para la detección y manejo de esta enfermedad, destacando entre ellos la determinación serológica del antígeno específico de próstata (PSA). En el presente trabajo se generó y caracterizó un panel de 11 anticuerpos monoclonales (AcMs) IgG1 que detectan con alta afinidad los epítopos principales descritos del PSA, tanto en solución c...

  19. Anticuerpos IgA secretorios de la leche materna protectores contra la infección por Cryptosporidium parvum SECRETORY IgA ANTIBODIES BREAST MILK PROTECTED AGAINST INFECTION BY Cryptosporidium parvum

    Directory of Open Access Journals (Sweden)

    ROSA CASTILLO

    2001-01-01

    Full Text Available Se evaluó el efecto protector de la leche materna de 150 madres sobre la infección por Cryptosporidium parvum en niños menores de 2 años. La leche presenta anticuerpos Inmunoglobulinas A Secretoria (IgAs específicas contra el antígeno de C. parvum por la prueba de Inmunoelectrotransferencia blot (EITB. Cada madre secretó leche con diferente composición de IgAs específicas contra 15 fracciones proteicas del antígeno de C. parvum con pesos moleculares de 15 a 158 k-Da, permaneciendo constantes durante la lactación. Existe menor riesgo a la infección por C. parvum en niños que lactaron leche materna con presencia de IgAs específicas contra las fracciones proteicas de alto peso molecular del antígeno de C. parvum (158, 123 y 97 k-DaThe protective effect of breast milk from 150 women on infection produced by protozoa Cryptosporidium parvum of children under 2 years old living in a shantytown nearby Lima, Perú was studied. Breast milk had specific secretory Inmunoglobulin A (sIgA antibodies to C. parvum antigen determined by Inmunoelectrotransfer blot (EITB assay. Each mother secreted milk with different composition of specific secretory IgA antibodies against 15 proteins of C. parvum antigen with molecular weight 15-158 k-Da, remained constant during the 24 month lactation period. The risk of C. parvum infection was reduced in children breast milk with specific secretory IgA against proteins of high molecular weight C. parvum antigen (158, 123 y 97 k-Da, protecting the breast fed baby from infection

  20. Detection of PMTV Using Polyclonal Antibodies Raised Against a Capsid-Specific Peptide Antigen / Detección de PMTV Utilizando Anticuerpos Policlonales Contra un Péptido Antigénico Derivado de la Cápside Viral

    Directory of Open Access Journals (Sweden)

    Yuliana Gallo García

    2013-12-01

    Full Text Available Potato mop-top virus (PMTV; genus Pomovirus;family Virgaviridae is the causing agent of the spraing disease in potato (Solanum tuberosum. PMTV is transmitted by Spongospora subterranea f. sp. subterranea (Sss. This disease has a widespread distribution in potato growing regions around the world. The possibility of obtaining strain specific antibodies at low cost can greatly increase the sensitivity and use of serological tests in seed certification programs, plant breeding and quarantine regulations to avoid dissemination of this injurious virus. This work presents an alternative procedure for the production of PMTV specific antibodies useful in serological test such as ELISAand lateral flow. In contrast to standard methods requiring theisolation of viral particles or expression of recombinant capsid, this method uses peptides mimicking the N-terminal region of PMTV capsid protein as antigen for the production of specific polyclonal antibodies. The antibodies were tested against bait plants grown in soil infested with viruliferous Sss, as well as potato plants obtained from naturally Sss infested fields in Colombia. PMTV was detected in 9/14 and 24/28 foliage samples of N. benthamiana and S. phureja, respectively. In the case of field plants, the virus wasdetected in eight out of 12 root tissues evaluated. The minimumpeptide concentration detected by ELISA was of the order of 0.1 nM. / Potato mop-top virus (PMTV; género Pomovirus; familia Virgaviridae es transmitido por Spongospora subterranea f. sp. subterranea (Sss, agente causal de la sarna polvosa de la papa. Esta enfermedad tiene una amplia distribución en las regiones cultivadoras de papa alrededor del mundo. La posibilidad de obtener anticuerpos específicos contra cepas de este virus, puede incrementar la sensibilidad y la utilización de pruebas serológicas en programas de certificación de semilla, mejoramiento genético y regulaciones cuarentenarias que eviten su diseminaci

  1. Detección de anticuerpos contra el virus de la peste porcina clásica mediante la prueba inmunoenzimática (CIV-ELISA y seroneutralización Detection of antibodies against the classical swine fever virus by enzime-linked immunosorbent assay (ELISA

    Directory of Open Access Journals (Sweden)

    A. ISLAS

    1997-01-01

    Full Text Available La peste porcina clásica (PPC es una enfermedad de gran importancia mundial. En Chile está sometida a un programa de control y erradi-cación. El presente ensayo tuvo como objetivo estandarizar y comparar una técnica inmunoenzimática (CIV-ELISA que detecta anticuerpos del tipo IgG dirigidos contra el virus de la PPC, con la seroneutralización (SN, técnica oficial para el diagnóstico serológico. Se utilizaron 20 cerdos híbridos Landrace x Large White de 20 kg de peso vivo, los que fueron inoculados experimentalmente con una dosis de 100.000 DICT50 del aislado virulento Quillota del virus PPC. Un grupo constituido por 4 cerdos fue vacunado 14 días antes de la inoculación. Se tomaron muestras de sangre a los 3, 6, 9, 12 y 14 días post-inoculación. Además, se obtuvieron muestras serológicas de 100 hembras reproduc-toras. Los anticuerpos anti-PPC fueron determinados por un CIV-ELISA policlonal, realizándose comparación con la prueba de SN. La prueba CIV-ELISA no detectó anticuerpos en los cerdos inoculados experimentalmente hasta los 14 días post-inoculación. Sin embargo, los cerdos vacunados previamente fueron seropositivos, situación ratificada por la SN. La sensibilidad y especificidad del CIV-ELISA fue de 90.1% y 76.4%, respectivamente. El CIV-ELISA demostró ser una prueba de fácil aplicación y los resultados son similares a los de la SNClassical swine fever (CSF is an important worldwide disease. In Chile, it is subject to a control and erradication programme. The objective of the present assay was to standardize an immunoenzimatic technique (CIV-ELISA that detects antibodies of the IgG type directed against the CSF virus and to compare it with seroneutralization. Twenty hybrid Landrace x Large White pigs with a live weight of 20 kg were used. They were experimentally inoculated with a dose of 100.000 TCID50 of the Quillota virulent isolate of the CSF virus. A four-pig group was vaccinated 14 days before inoculation

  2. Prevalencia de anticuerpos contra virus dengue en el cantón de Golfito (2005 y en el Distrito Central de Puntarenas (2005-2006, Costa Rica Dengue seroprevalence in Golfito and the central district of Puntarenas, Costa Rica 2005-2006

    Directory of Open Access Journals (Sweden)

    Margarita Lee-Lui

    2008-09-01

    Full Text Available Justificación y objetivo: La primo infección con el virus dengue varía desde asintomática hasta cuadros muy severos, como el dengue hemorrágico o el síndrome de choque por dengue. El Distrito Primero de Puntarenas ha sido una de las poblaciones más afectadas desde 1993, cuando aparecieron los primeros brotes, hasta hoy, con una disminución de la incidencia en los últimos años. La región Brunca fue la segunda en incidencia en el país en 1998, y si bien la endemicidad se ha mantenido, no existen estudios epidemiológicos sobre la prevalencia de esta enfermedad; los datos que aporta el Ministerio de Salud corresponden a la incidencia de casos clínicos en un período determinado. El objetivo de este estudio fue determinar la seroprevalencia en el Distrito Primero de Puntarenas y en Golfito para conocer la vulnerabilidad de la población de sufrir fiebre hemorrágica por dengue y analizar la situación asociada a los datos epidemiológicos de estas regiones, tales como edad, sexo y ubicación geográfica, ya que una población susceptible es la que presenta una alta seroprevalencia, unida a condiciones de hacinamiento y alta densidad vectorial. Métodos: El muestreo se realizó con el método EPI descrito por la OMS. Se recolectaron 210 muestras de suero en cada distrito, se desarrolló y estandarizó una prueba de ELISA de captura de antígeno para la detección de anticuerpos tipo IgG contra dengue, usando como referencia el método de reducción de placas de Dulbecco considerado estándar de oro. Resultados: La seroprevalencia contra dengue fue del 43.8% (92 y del 90% (189 en los distritos de Golfito y Central de Puntarenas, respectivamente, sin diferencias significativas respecto al sexo, la edad y la localidad. Se obtuvo un 83% y un 95% de correlación en Golfito y Puntarenas, respectivamente, entre los casos sintomáticos y la serología con el método estandarizado. Un 32% y un 42% del total de seropositivos en cada localidad

  3. Detección de anticuerpos contra Trypanosoma cruzi utilizando discos de 3 mm en muestras de sangre seca sobre papel de filtro

    Directory of Open Access Journals (Sweden)

    Idialis Hernández-Spengler

    2014-01-01

    Full Text Available La utilización de sangre seca sobre papel de filtro ha despertado gran interés en los últimos años en los inmunoensayos debido a las ventajas que ofrece este modo de presentación de las muestras, lo que permite su utilización en países con recursos limitados para realizar estudios epidemiológicos. En este trabajo, se determinaron las condiciones óptimas de elución de muestras de sangre seca sobre papel de filtro para discos de 3 mm, como referencia se tomaron muestras de suero y las condiciones de elución establecidas para discos de 5 mm, en la detección de anticuerpos específicos a Trypanosoma cr uzi mediante el ensayo inmunoenzimático indirecto UMELISA ® CHAGAS ( Tecnosuma Internacional S.A. basado en el Sistema Ultra Micro Analítico (SUMA ® . Se evaluaron 12 muestras de suero positivos a la enfermedad de Chagas procedentes de Colombia confirmados p or inmunofluorescencia indirecta (IFI y ELISA – Chagatek ® y 75 muestras de sangre seca sobre papel de filtro procedentes de Bolivia reactivas por el UMELISA ® CHAGAS. Además, se evaluaron muestras de suero y sangre seca sobre papel de filtro negativas a la enfermedad de Chagas procedente de donantes sanos del banco de sangre provincial de La Habana. Los resultados del estudio de sensibilidad y especificidad para discos de 3 mm y 5 mm fueron similares. La reducción del diámetro del disco permite, a partir d e una misma mancha, realizar una mayor cantidad pruebas de diagnósticos para la detección de otras enfermedades, como el síndrome de inmunodeficiencia humana adquirida, hepatitis B y C entre otras.

  4. Evaluación de la respuesta de anticuerpos hacia antígenos de Pseudomonas aeruginosa.

    Directory of Open Access Journals (Sweden)

    Aniel Moya

    2007-04-01

    Full Text Available Pseudomonas aeruginosa es un patógeno extracelular que genera una respuesta de anticuerpos específicos con utilidad para el diagnóstico y vacunas. En el presente estudio nos propusimos evaluar en suero humano los niveles de anticuerpos contra antígenos relevantes de P. aeruginosa. Realizamos la determinación de anticuerpos IgG contra tres exoenzimas, consideradas como factores de virulencia de mayor importancia en infecciones. Este resultado dio paso a la evaluación del reconocimiento de IgG e IgA hacia antígenos de la envoltura celular bacteriana por ELISA de células enteras. Todos los sueros evaluados mostraron títulos de IgG e IgA superiores a los individuos sanos, con excepción de dos muestras de pacientes que no mostraron alto título. Este ensayo permitió analizar el nivel de reconocimiento hacia los antígenos más expuestos de la bacteria que incluyen principalmente LPS y proteínas de membrana externa. Se encontró diferencias entre los valores de densidad óptica a 450 nm de individuos sanos y enfermos. El método usado permitió seleccionar dos sueros de pacientes de diferentes tipos de infecciones que fueron comparados por Western blot. Se observó que aunque los sueros tenían reacción hacia distintos serotipos de P. aeruginosa, la intensidad del reconocimiento variaba según el tipo de infección.

  5. Neospora caninum antibodies in dairy cattle of Lages Municipality, Santa Catarina State, Brazil Anticuerpos séricos contra Neospora caninum en rebaños lecheros de la ciudad de Lages, Estado de Santa Catarina, Brasil

    Directory of Open Access Journals (Sweden)

    AB Moura

    2012-01-01

    Full Text Available Bovines are the main intermediary host of the protozoan Neospora caninum, which is a major cause of bovine abortions and neonatal mortality worldwide. Sera were collected from 373 dairy cattle and 33 dogs on 19 dairy farms in Lages city, Santa Catarina State, Brazil, to determine the prevalence of N. caninum antibodies and risk factors. Tests for N. caninum antibodies were done using an indirect immunofluorescent antibody test (IFAT. Positive reactions with titers ≥ 1:200 (cattle and ≥ 1:50 (dogs were found in 86 (23.1% and seven (21.2% bovines and dogs, respectively. Of the bovines, four (1.1% were calves, 33 (8.8% were heifers, 314 (84.2% were lactating cows, 19 (5.1% were dry cows and three (0.8% were bulls. Infection was primarily found in animals with low milk production (P = 0.008. The presence of seropositive dogs on the properties did not affect the prevalence of bovine infection. No correlation between bovine reproductive disorders and the prevalence of N. caninum antibodies was observed. Our results showed that N. caninum infection is widespread among dairy cattle of Lages, Santa Catarina.Los bovinos son los principales hospederos intermediarios del coccidio Neospora caninum. En esta especie se concentran la mayoría de los daños reproductivos. A fin de determinar la prevalencia de N. caninum e identificar factores de riesgo para la infección en el ganado lechero de la ciudad de Lages, Estado de Santa Catarina, se tomaron muestras de sangre de bovinos (n = 373 y los perros (n = 33 en 19 propiedades. La detección de anticuerpos contra N. caninum fue realizada por medio de IFA. Fueron consideradas positivas las muestras con títulos ≥ 200 (ganado bovino y ≥ 50 (perros. Informaciones relacionadas con la categoría de los animales, la raza, la frecuencia y tipo de trastornos de la reproducción, la producción de leche y la presencia de los perros fueron obtenidos mediante un cuestionario. Los datos fueron analizados con la

  6. Detección de anticuerpos séricos contra Toxoplasma gondii (Nicolle y Manceaux, 1909) en llamas (Lama glama Linneaus, 1758) y alpacas (Lama pacos Linneaus, 1758 ) de Chile Sera antibodies to Toxoplasma gondii in lamas and alpacas of Chile

    OpenAIRE

    A.N. Patitucci; M.J. Pérez; Barril, G. (Guillermina); C.M. Cárcamo; Muñoz, A.

    2006-01-01

    Se obtuvieron 113 sueros de llamas y 127 de alpacas de criaderos ubicados en la IX y V Regiones del país respectivamente para determinar la presencia de infección de T. gondii. Para el análisis de los sueros se utilizó el "test" modificado de aglutinación (MAT) a diluciones 1:25; 1:50, 1:500; 1:5000. Del total de 113 sueros de llamas estudiados 49 (43,3%) de ellas presentaron anticuerpos contra T. gondii, mientras que en las alpacas 15 de las 127 (11,8%) fueron positivas. El número de animale...

  7. Hallazgos de anticuerpos contra Leptospira sp., serovariedades Panama, Lai, Australis, Shermani y Patoc, en un grupo de monos rhesus (Macaca mulatta en condiciones de cautiverio Antibodies findings against Leptospira sp., of the serovars Panama, Lai, Australis, Shermani, and Patoc, in a group of rhesus monkeys (Macaca mulatta in conditions of captivity

    Directory of Open Access Journals (Sweden)

    A Ibáñez-Contreras

    2010-01-01

    Full Text Available La leptospirosis ha emergido como una importante enfermedad infecciosa, lo que ha ocurrido en diferentes entornos desde urbanos hasta medios naturales; los portadores son animales salvajes o domésticos. El objetivo fue evaluar la presencia de anticuerpos contra Leptospira en monos rhesus en condiciones de bioterio. Se utilizaron 59 monos de diferentes etapas fisiológicas. Se determinaron anticuerpos contra Leptospira a partir de la prueba de aglutinación microscópica (TAM, utilizando como antígenos 25 serovariedades de Leptospira. Se observó que de los 59 animales, únicamente el 30,50% reaccionaron contra una o más serovariedades de Leptospira. En este trabajo se determinaron anticuerpos contra cuatro serovariedades de Leptospira: Panama, Lai, Australis y Shermani, consideradas como patógenas, y once de las muestras reaccionaron contra la serovariedad Patoc, considerada no patógena y saprófita. Ninguno de los animales que resultaron positivos contra Leptospira presentó signos clínicos compatibles con leptospirosis.During the last decade leptospirosis has emerged as a worldwide and very important infectious disease, affecting different environments from urban to rural, with carriers usually being wild or domestic animals. The objective of this study was to evaluate the presence of antibodies against Leptospira in rhesus monkeys (Macaca mulatta in a Research Center. Fifty nine non-human primates of different physiological stages were studied. The animals were held in groups and in individual cages. Blood samples were obtained from the saphenous vein to determine the presence of antibodies through the microscopic agglutination test (MA, using twenty five serovars of Leptospira as antigens. It was observed that 18 out of the 59 monkeys (30.50% reacted against one or more serovars of Leptospira. In this study, antibodies of 4 serovars of Leptospira, (Panama, Lai, Australis, and Shermani were detected. All 4 serovars were considered

  8. Morfología y respuesta de anticuerpos IgM e IgG anti-Blastocystis sp. en pacientes con síntomas gastrointestinales.

    Directory of Open Access Journals (Sweden)

    Emilia Elena Barrios

    2013-12-01

    Full Text Available Morphology and response of IgM and IgG anti - Blastocystis sp. in patients with gastrointestinal symptoms. It is important to define diagnostic criteria to elucidate the pathogenic role of Blastocystis sp . Morphology was assessed and diameter of the shapes, number of parasites per field and per gram of faeces and Blastocystis sp . Ig M and IgG antibodies was estimated by ELISA in subjects with constitutional symptoms an d healthy carriers. Seventy percent Blasctocystis sp positive samples were found, 52% from patients with symp toms such as flatulence 6 (24% , abdomi nal pain 5 (20 %, nausea 2 (8% , diarrhea 6 (24% and cons tipation 6 (24% . Ranges of parasites per field f ound more frequently in symptomatic patients were 0 - 3 (74% and 10 - 12 (26% , while 100% of asymptomatic patients had Blastocystis sp . in the range 0 - 3. Asymptomatic patients showed lower number of parasites per gram feces in the range of 0 - 3 and the 7 - 10 r ange with high parasitic load w as only observed in symptomatic . Less granular forms in both groups was found , in the range 0 - 3 in symptomatic patients : 85% vacuolar and 15% granular ; 76% vacuolar and 24 % granular in asymptomatic s . In the range 10 - 12, 98% v acuolar and 2% granular in symptomatic patients . The average diamet er of the vacuolar forms was 11. 9 ± 2 μm in s ymptomatic patients and 7.9 ± 3. 7 μm in asymptomatic s . In the granular form was 9.3 ± 2. 3 μm in symptomatic and 8.2 ± 0. 1 μm in asymp tomatics . Significant difference was found among vacuolar forms of both groups ( P = 0. 000026 , but not in the granular form (P = 0. 346 . Only 3. 5 % of s ymptomatic patients had IgG antibodies to Blastocystis sp. The m orphological study employed contributed to the diagn osis optimization while immunoenzymatic techniques were of low sensitivity.

  9. Prevalencia de anticuerpos contra Trypanosoma cruzi en donadores de sangre del IMSS, Orizaba, Veracruz, México Prevalence of antibodies against Trypanossoma cruzi in blood bank donors from the IMSS General Hospital in Onizaba, Veracruz, Mexico

    Directory of Open Access Journals (Sweden)

    Angel Ramos-Ligonio

    2006-02-01

    Full Text Available OBJETIVO: Determinar la prevalencia de anticuerpos contra Trypanosoma cruzi en donadores del Hospital General Regional del Instituto Mexicano del Seguro Social (IMSS en la ciudad de Orizaba, Veracruz. MATERIAL Y MÉTODOS: Se examinaron muestras de donadores del banco de sangre del Hospital General Regional (HGRO del IMSS para la búsqueda de antiT. cruzi por ELISA, Western blot e IFI, utilizando una proteína recombinante (MBP::Hsp70 y un extracto crudo de epimastigotes. Las muestras fueron obtenidas entre los meses de octubre de 2001 a enero de 2002. RESULTADOS: Los 420 donadores de sangre analizados fueron seronegativos para HBV, HCV, BrA, VDRL y HIV. Después del tamizaje de los 420 donadores, se identificaron dos individuos seropositivos por las pruebas de ELISA, Western blot e IFI, con una seroprevalencia de 0.48%. CONCLUSIONES: En este estudio se muestran evidencias de seropositividad para T. cruzi en donadores de sangre del HGRO, lo que sugiere la existencia de riesgo de contaminación por transfusión sanguínea. Por tal motivo, es necesario aplicar programas para el tamizaje serológico a través de técnicas inmunológicas con alta sensibilidad y especificidad.OBJECTIVE: To estimate the prevalence of antibodies against Trypanosoma cruzi in blood donors from Hospital General Regional (HGRO of the Mexican Institute of Social Security (IMSS per its abbreviation in Spanish. MATERIAL AND METHODS: Between October 2001 and January 2002, blood samples were collected from voluntary donors at the blood bank of the Hospital General Regional of IMSS in Orizaba; Veracruz, Mexico. The samples were assayed for anti-T. cruzi by ELISA, Western blot and IFI, using a recombinant protein (MBP::Hsp70, and crude extract from epimastigotes. RESULTS: A total of 420 blood donors were studied; two of them were seropositive for ELISA, Western blot and IFI, with a seroprevalence of 0.48%. CONCLUSIONS: Some blood donors at the HGRO hospital were seropositive for T

  10. Prevalencia de anticuerpos anti envoltura nuclear y sus isotipos en sueros positivos para anticuerpos antinucleares Prevalence of antinuclear envelope antibodies and their isotypes in sera positive for antinuclear antibodies

    Directory of Open Access Journals (Sweden)

    Miriam Arcavi

    2006-08-01

    Full Text Available Los anticuerpos antinucleares detectados por inmunofluorescencia indirecta en células HEp-2 presentan una gran variedad de imágenes, entre ellas el patrón de envoltura nuclear que suele ser un hallazgo poco frecuente. Se procesaron 2594 sueros en los cuales se detectó un 37.6% de anticuerpos antinucleares. La prevalencia de anticuerpos anti-envoltura nuclear (ANEA fue del 1.2% presentando una alta asociación con hepatopatías autoinmunes (83% y baja con lupus eritematoso sistémico. En los 21 sueros de los pacientes que presentaron ANEA no se detectaron anticuerpos anti-ADNn hallándose 28.6% de anticuerpos anti-músculo liso y 19% de anticuerpos anti-mitocondriales. El corte triple de tejido de rata mostró ser un sustrato menos sensible que HEp-2 para la detección de ANEA. Al utilizar conjugados dirigidos contra diferentes isotipos de anticuerpos para la detección de ANEA, se encontró: 90.5% de IgG, 66.6% de IgA y 9.5% de IgM. Dos de los pacientes presentaron ANEA-IgA a altos títulos (³1:160 en ausencia de ANEA-IgG. En este trabajo se destaca la importancia de realizar pruebas complementarias que detecten anticuerpos anti-músculo liso, anti-mitocondriales y anti-ADNn, para orientar el diagnóstico clínico de los pacientes que presentan ANEA. Además, sostiene la postura de utilizar como conjugado para IFI-HEp2 anticuerpos anti-inmunoglobulinas totales en lugar de anti-IgG hasta tanto se clarifique el rol que juegan los anticuerpos IgA en estas enfermedades autoimunes.Antinuclear antibodies detected in HEp-2 cells by indirect immunofluorescence assay display a great variety of images, including the nuclear envelope pattern. This is quite a less frequent finding. Two thousand five hundred and ninety-four sera were processed, and 37.6% of ANA were detected. The prevalence of anti-nuclear envelope antibodies (ANEA was of 1.2%, with a high association with autoimmune liver diseases (83% and a low association with systemic lupus

  11. Papel protector de los anticuerpos en la salmonellosis experimental

    OpenAIRE

    Guzmán U., Miguel; Ramírez, Germán

    2011-01-01

    El presente trabajo fue realizado con el propósito de demostrar la capacidad protectora de anticuerpos contra la Salmonella typhi, en la infección experimental en pollos recién nacidos, previamente protegidos con tales anticuerpos.  La cepa de Salmonella typhi usada, tanto para preparar los antígenos O y H como para reproducir experimentalmente la Salmonellosis, fue una cepa Standard de la colección de la Sección de Microbiología de la Facultad de Medicina. Los medios de cultivo usados, tanto...

  12. Desarrollo de un Sistema ELISA para cuantificar IgG de ratón tomando como base la tecnología IgY

    Directory of Open Access Journals (Sweden)

    Esteban J. Gutiérrez Calzado

    2007-01-01

    Full Text Available Se conoce que desde 1893, se había descrito un experimento en el que se demostraba que en el proceso de inmunización de gallinas, el resultado consistía en la transferencia de anticuerpos específicos hacia la yema de sus huevos. Tomando como base este conocimiento, este trabajo se enfocó en demostrar que los anticuerpos de yema de huevo obtenidos a partir de gallinas inmunizadas con una preparación comercial de IgG de ratón pueden constituir una alternativa a sus similares en mamíferos al conjugarse con la enzima peroxidasa y utilizarse como reactivos en técnicas ELISA para la determinación de anticuerpos monoclonales murinos del tipo IgG. Para esto, se desarrollaron esquemas de inmunización en paralelo en gallinas y conejos a los que se les aplicaron diversas dosis del antígeno (IgG de ratón demostrándose que las gallinas son capaces de brindar títulos de anticuerpos aunque menores que en el conejo, sí razonables en sus yemas de huevo contra este antígeno, útiles para procesos posteriores. Se demuestra que el método del m-peryodato de sodio es aplicable a los anticuerpos de yema de huevo (IgY para conjugarlos a la enzima peroxidasa para su uso exitoso en inmunoensayos como el ELISA. El Sistema ELISA desarrollado sobre la base de los anticuerpos IgY mostró en su desempeño algunas ventajas a su similar desarrollado con conjugado de anticuerpos de mamíferos. Este trabajo demuestra que la obtención de anticuerpos IgY en este caso, es una fórmula que reduce los costos de producción de conjugados enzimáticos al menos tres veces, lo que conjuntamente con los elementos bioéticos la convierte en una vía atractiva para complementar los procesos tradicionales de producción de anticuerpos.

  13. IgG antibodies to dengue in dry blood samples in filter paper.

    Directory of Open Access Journals (Sweden)

    Carmen Acosta

    2003-01-01

    Full Text Available En este trabajo se presentan los resultados de la normalización del procedimiento de detección de anticuerpos IgG contra el virus dengue en muestras de sangre colectadas sobre papel de filtro. Las muestras se obtuvieron de 216 individuos que acudieron al banco de sangre de Marianao de los cuales 25 presentaron resultados con títulos superiores a 1:40 por la técnica de Inhibición de la Hemaglutinación. En todas las muestras se determinó la presencia de anticuerpos IgG contra el virus dengue mediante un inmunoensayo enzimático (UMELISA de captura. Cuando se compararon las condiciones de elución de treinta minutos y una hora la coincidencia fue del 93 y 100 % respectivamente. En las dos condiciones evaluadas en el paso de la incubación de las muestras en la placa de reacción; una hora a 37 ºC y una hora a temperatura ambiente; la coincidencia fue del 100 %, manteniendo este paso igual para el procesamiento de muestras de sangre colectadas sobre papel de filtro como las de suero (una hora a 37 ºC. Al analizarse en su conjunto los resultados de las muestras se obtuvo una sensibilidad y especificidad del 100 % en los tiempos ensayados, para la prueba efectuada con sangre total colectada sobre papel de filtro conservada a 4 ºC y las conservadas a temperatura ambiente. Los autores recomiendan la utilización de este método para la detección de anticuerpos anti dengue.

  14. Seroprevalence of IgG antibodies against Anaplasma marginale in cattle from south Mozambique Soroprevalência de anticorpos de classe IgG contra Anaplasma marginale em bovinos da região Sul de Moçambique

    Directory of Open Access Journals (Sweden)

    António Amélia Mucalane Tembue

    2011-12-01

    Full Text Available The current study aimed to investigate the seroprevalence of IgG antibodies to Anaplasma marginale in cattle from Maputo, Gaza and Inhambane provinces, south Mozambique. A total of 809 serum samples from cattle were obtained and tested by indirect enzyme-linked immunosorbent assay (i-ELISA. The chi-square test at 5% significance was used to assess the association between seroprevalence and the variables gender, age and geographic origin of animals. The overall seropositivity was 76.5% (n = 619 and anti-A. marginale antibodies were detected in 89.1% (n = 156, 68.4% (n = 308 and 84.2% (n = 155 of the animals in the provinces of Maputo, Gaza and Inhambane, respectively. A significant association (p 12 and 24 and 36 months, respectively. These results indicate that in southern Mozambique there are areas of enzootic stability to A. marginale. Thus, epidemiological monitoring is required to monitor the immune status of animals in the region.O objetivo do presente estudo foi investigar a soroprevalência de anticorpos da classe IgG contra Anaplasma marginale em bovinos de corte da região Sul de Moçambique. Para esse efeito, 809 amostras de soro foram coletadas e avaliadas pelo ensaio imunoadsorção enzimático indireto (ELISA-i. O teste Qui-Quadrado, a 5% de significância, foi utilizado para avaliar a associação entre a soroprevalência e as variáveis sexo, idade e origem geográfica dos animais. A soropositividade geral foi de 76,5% (n = 619, e anticorpos anti-A. marginale foram detectados em 89,1% (n = 156, 68,4% (n = 308 e 84,2% (n = 155 dos animais nas províncias de Maputo, Gaza e Inhambane, respectivamente. Uma associação significativa (p 12 a 24 36 meses, respectivamente. Os resultados demonstram que, no Sul de Moçambique, existem áreas de estabilidade enzoótica para A. marginale, em animais maiores de 12 meses. Assim, monitoramento epidemiológico deve ser realizado para o acompanhamento do status imunológico dos animais na região.

  15. Anticuerpos circulantes contra Influenza Aviar y Newcastle en zanates (Quiscalus mexicanus de la ciudad de Guatemala (Avian flu and Newcastle Antibodies in Great-tailed Grackles (Quiscalus mexicanus in Guatemala city.

    Directory of Open Access Journals (Sweden)

    Escobar, Luis E.

    2011-03-01

    Full Text Available ResumenAunque el zanate (Quiscalus mexicanus está distribuido en todaGuatemala y se encuentra estrechamente ligado a poblaciones humanas,se sabe muy poco acerca de su estado sanitario y su papel comoreservorio de enfermedades aviares de importancia. Esta investigacióngenera información sobre el papel del zanate en la epizootiología de la Influenza Aviar (IA; Orthomyxoviridae y de Newcastle (ENC;Paramixoviridae, midiendo los anticuerpos circulantes en zanates norelacionados a granjas avícolas. Se colectaron 71 muestras de suero dezanates urbanos asintomáticos del la ciudad de Guatemala entre abril yjulio de 2008 y se analizaron con la prueba de Inhibición de laHemoaglutinación.SummaryDespite the Great-tailed Grackle (Quiscalus mexicanus is distributed in all Guatemala and it is so close to human populations, few is knownabout its sanitarian status and role as reservoir of important aviandiseases. This research provides information about the role of the Greattailed Grackle in the epizootiology of Avian Influenza (AI;Orthomyxoviridae and Newcastle Disease (NCD; Paramixoviridae,measuring the antibodies of Grackles non-related to avian farms. Wecollected 71 serum samples from urban Great-tailed Grackles without any symptoms in Guatemala City from April to June of 2008, and analyzed with hemagglutination Inhibition Test.

  16. Encefalitis aguda mediada por anticuerpos contra el receptor ionotrópico de glutamato activado por N-metil-D-aspartato (NMDAR: análisis de once casos pediátricos en Argentina (Premio Benito Yelín

    Directory of Open Access Journals (Sweden)

    Elisa Pérez

    2013-09-01

    Full Text Available Las encefalitis son procesos inflamatorios de diverso origen, entre las cuales se incluyen las autoinmunes. La identificación de anticuerpos contra el receptor N-metil-D-aspartato permitió la caracterización clínico-inmunológica de una entidad susceptible a tratamiento inmunomodulador. Descripta originalmente en mujeres jóvenes, asociada a teratoma de ovario, es hoy una entidad reconocida en niños aun en ausencia de tumores detectables. El objetivo del trabajo, realizado a través de la revisión de historias clínicas, fue describir las características clínicas, evolutivas y los hallazgos en estudios complementarios de once niños con diagnóstico confirmado de esta entidad a través de la identificación de los anticuerpos específicos. Todos debutaron con síntomas psiquiátricos, en nueve de ellos asociando a convulsiones, y dos a movimientos extrapiramidales. En su evolución, todos presentaron compromiso del lenguaje, nueve, síntomas autonómicos graves, en uno con hipoventilación y requerimientos de ARM. La RM de cerebro fue anormal en tres. Ocho tuvieron EEG con asimetría del voltaje y/o amplitud, tres de ellos presentaron espigas. En el LCR seis tuvieron pleocitosis y tres de siete bandas oligoclonales positivas. Cinco, serologías IgM para micoplasma. El aumento de CPK en coincidencia con antipsicóticos ocurrió en cinco. Con el tratamiento inmunomodulador, cinco tuvieron recuperación total, tres, alteraciones conductuales/cognitivas y uno déficits severo. Un paciente resolvió su cuadro clínico sin tratamiento. En ninguno se detectó tumor asociado. Concluimos que frente a un niño con encefalopatía aguda y clínica compatible con esta entidad, una vez descartada causa infecciosa, se debe comenzar tratamiento inmunomodulador precozmente, evitar la utilización de fármacos antipsicóticos y realizar la búsqueda de posibles tumores ocultos.

  17. Evaluación de la eficacia de la prueba de inmunodifusión en gel agar para la detección de anticuerpos contra el virus de la leucosis enzootica bovina

    OpenAIRE

    Zoraida Nava; César Obando; Magaly Bracamonte; Aurico Sousa; Mayra Hidalgo

    2012-01-01

    contra el virus de la leucosis enzoótica bovina (VLEB), comparándola con el ensayo inmunoenzimático (ELISA). Se procesaron 360 muestras de suero bovino para ambas pruebas, siguiendo las indicaciones del fabricante. El grado de concordancia (GC), valores predictivos (VP) y razones de verosimilitud (RV) fueron determinados y analizados. El GC entre ambas pruebas resultó ser del 86,4%, con un coeficiente Kappa (K) = 0,7. La IDGA detectó una significativa (P

  18. Avaliação eosinofílica e soropositividade para anticorpos IgG anti-toxocara em crianças atendidas pelo Sistema Único de Saúde Evaluación eosinófila y suero-positividad para anticuerpos igG anti-toxocara en niños atendidos por el Sistema Único de Salud Eosinophilic count and seropositivity for IgG antibodies to toxocara spp. in children assisted at the public health service

    Directory of Open Access Journals (Sweden)

    Ariella Andrade Marchioro

    2011-03-01

    Full Text Available OBJETIVO: Verificar a associação entre a presença de eosinofilia e a soropositividade para anticorpos IgG anti-Toxocara spp. em crianças atendidas pelo Sistema Único de Saúde no Noroeste do Paraná, Brasil. MÉTODOS: Estudo retrospectivo com crianças de sete meses a 12 anos, atendidas pelo Sistema Único de Saúde do Noroeste do Paraná, com teste ELISA para a pesquisa de anticorpos IgG anti-Toxocara spp. e contagem de eosinófilos (eosinofilia >600 células/mm³. RESULTADOS: Entre as 1.199 crianças, 386 (32,2% apresentaram anticorpos IgG anti-Toxocara spp. A soroprevalência e a eosinofilia foram mais frequentes em crianças de sete meses a cinco anos. A eosinofilia foi observada em 7,8% dos pacientes soro-reagentes ao Toxocara spp.. CONCLUSÕES: Foi observada elevada prevalência de anticorpos anti-Toxocara spp., principalmente nos menores de cinco anos. Com exceção de algumas crianças que apresentaram sintomas respiratórios e presença de eosinofilia, a maioria foi assintomática e não mostrava eosinofilia. A pesquisa de eosinófilos é ferramenta secundária para o diagnóstico de toxocaríase.OBJETIVO: Verificar la asociación entre la presencia de eosinofilia y una suero-positividad para anticuerpos IgG anti-Toxocara spp. en niños atendidos por el Sistema Único de Salud en el noroeste de Paraná, Brasil. MÉTODOS: Estudio retrospectivo en niños de siete meses a 12 años de edad, atendidos por el Sistema Único de Salud en el noroeste de Paraná, con prueba de ELISA para la investigación de anticuerpos IgG anti-Toxocara spp. y recuento de eosinófilos (eosinofilia > 600 células/mm³. RESULTADOS: Entre los 1.199 niños, 386 (32,2% presentaron anticuerpos IgG anti-Toxocara spp. La suero-prevalencia y la eosinofilia fueron más frecuentes en niños de siete meses a cinco años. La eosinofilia fue observada en 7,8% de los pacientes suero-reactivos al Toxocara spp. CONCLUSIÓN: Se observó elevada prevalencia de anticuerpos

  19. Frecuencia de anticuerpos contra el virus C de la hepatitis en pacientes con cirrosis hepática en Yucatán, México Frequency of antibodies against the hepatitis C virus in patients with hepatic cirrhosis in Yucatan, Mexico

    Directory of Open Access Journals (Sweden)

    Renán A Góngora-Biachi

    2003-10-01

    Full Text Available OBJETIVO: En este estudio reportamos la prevalencia de anticuerpos contra el virus C de la hepatitis (Ac-VCH en un grupo de pacientes con cirrosis hepática (CH. MATERIAL Y MÉTODOS: Se hizo un estudio prospectivo, transversal y descriptivo, de marzo de 1998 a mayo de 1999. Se estudiaron a 153 pacientes (117 (76% hombres y 36 (24% mujeres con diagnóstico de CH, que eran atendidos en el Hospital General Agustín O' Horan y en el Centro de Investigaciones Regionales Doctor Hideyo Noguchi, en la ciudad de Mérida, Yucatán, México. Se aplicó un cuestionario con datos clínico-epidemiológicos y se determinó la presencia de Ac-VCH (ELISA de 2ª generación y RIBA-2 para confirmar el diagnóstico a cada paciente. Se determinó también el antígeno de superficie de la hepatitis B (AgsHB y anticuerpos contra el antígeno central de la hepatitis B (Anti-HBc mediante el método de ELISA. La presencia de Ac-VCH fue relacionada con las variables epidemiológicas de los sujetos. La prevalencia de anti-HCV y la frecuencia de características se compararon entre los pacientes positivos y negativos con las pruebas de c² y exacta de Fisher. RESULTADOS: El 32% de los pacientes con CH (35/117 (30% hombres y 14/36 (39% mujeres fueron positivos para los Ac-VCH. El alcoholismo estuvo presente en todos los hombres serorreactivos y en ninguna de las mujeres positivas (pOBJECTIVE: To report the prevalence of antibodies against the hepatitis C virus (anti-HCV in a group of patients with hepatic cirrhosis (HC. MATERIAL AND METHODS: A prospective transversal and descriptive study was carried out from March 1998 to May 1999. Study subjects were 153 patients; 117 (76% male and 36 (24% female, diagnosed with HC. They were attended at the General Hospital Agustín O' Horan and at Regional Research Center Doctor Hideyo Noguchi, in Merida, Yucatan, Mexico. A clinical-epidemiologic questionnaire completed by interview was used for data collection. Anti-HCV were detected

  20. Detección de anticuerpos séricos contra Toxoplasma gondii (Nicolle y Manceaux, 1909 en llamas (Lama glama Linneaus, 1758 y alpacas (Lama pacos Linneaus, 1758 de Chile Sera antibodies to Toxoplasma gondii in lamas and alpacas of Chile

    Directory of Open Access Journals (Sweden)

    A N Patitucci

    2006-01-01

    Full Text Available Se obtuvieron 113 sueros de llamas y 127 de alpacas de criaderos ubicados en la IX y V Regiones del país respectivamente para determinar la presencia de infección de T. gondii. Para el análisis de los sueros se utilizó el "test" modificado de aglutinación (MAT a diluciones 1:25; 1:50, 1:500; 1:5000. Del total de 113 sueros de llamas estudiados 49 (43,3% de ellas presentaron anticuerpos contra T. gondii, mientras que en las alpacas 15 de las 127 (11,8% fueron positivas. El número de animales positivos en las diluciones 1/25; 1/50; 1/500; 1/5000 fue de 20 (17,6%; 9 (7,9%; 16 (10,6%; 4 (3,5% en las llamas, respectivamente. En las alpacas los valores fueron de 0 (0%; 3 (2,3%; 1 (0,7%; 11 (8,6%, respectivamente. Aunque no existen antecedentes clínicos de la infección en los establecimientos estudiados, su potencial implicancia en este tipo de patología debería ser considerada a base de los resultados del presente trabajo que demuestra que llamas y alpacas del centro-sur de Chile son reaccionantes a la infección por T. gondii.Sera samples from 113 llamas (Lama glama and 127 alpacas (Lama pacos from the IX and V Regions, respectively, of Chile were tested for Toxoplasma gondii antibodies. The modified agglutination test (MAT was used in both species and titers 1:25 were considered diagnostically significant based in previously published data. Sera from 49 lamas (43.3% and 15 alpacas (11.8% were positive to T. gondii. Percentaje seropositivity in serum dilutions of 1:25, 1:50, 1:500 and 1:5000 was 17.6%; 7.9%; 14.1% and 3.5% in lamas and 0%; 2.3%; 0.7% and 8.6% in alpacas, respectively. The rather low prevalence in alpacas may be associated with geographical conditions, management practices or contacts with cats rather than different species susceptibility. As expected, older animals showed higher reactivity of T. gondii than young animals.

  1. Anticuerpos antinucleares, imágenes y características obtenidas por inmunofluorescencia: Importancia de los isotipos IgA, IgM e IgG Antinuclear antibodies, patterns and characteristics obtained by immunofluorescence: The importance of the IgA, IgM and IgG isotypes

    Directory of Open Access Journals (Sweden)

    Miriam Arcavi

    2009-10-01

    Full Text Available La técnica de elección para el screening de anticuerpos antinucleares (ANA es la inmunofluorescencia indirecta que utiliza como sustrato una línea de células epiteliales de carcinoma de laringe humano (IFI-HEp2, y como antisuero, anti-IgG o anti-Ig totales. Los ANA-IgG son los más importantes para el diagnóstico y monitoreo de las enfermedades del tejido conectivo (ETC, mientras los ANA-IgM son de menor relevancia clínica en estos pacientes. Sin embargo, poco se sabe de los ANA-IgA ya que estos Ac han sido menos investigados. El objetivo de este trabajo fue estudiar la prevalencia de los diferentes isotipos de inmunoglobulinas de anticuerpos antinucleares en los pacientes con ETC y evaluar la conveniencia de utilizar conjugados monovalentes o polivalentes. Se procesaron 100 sueros de pacientes con diversas ETC empleando IFI-HEp2, en los cuales se detectó 38% de ANA-IgA (títulos ≥ 1:80 y 12% de ANA-IgM (títulos ≤ 1:160. En 29 casos se detectó IgA en ausencia de IgM, en 3 casos IgM en ausencia de IgA. En todos los casos los ANA-IgG estuvieron presentes. En 6 sueros se observó un cambio de imagen con conjugado anti-IgA y en 3 con conjugado anti-IgM. Debido a la alta prevalencia de ANA-IgA detectada por IFI-HEp2, se destaca la conveniencia de utilizar conjugado anti-Ig totales en lugar de anti-IgG, mientras se desconozca la relevancia de los ANA-IgA en el diagnóstico, pronóstico y seguimiento de las enfermedades reumáticas sistémicas.The indirect immunofluorescence with epitelial cell line from human laryngeal carcinoma as substrate (IIF-HEp2 and anti-IgG or anti-total Ig as antisera, is the technique currently used for the detection of antinuclear antibodies. The most important antibodies for the diagnosis and follow-up of connective tissue diseases (CTD are the IgG-ANA, while the IgM-ANA have no clinical relevance. However the IgA-ANA have not been thoroughly investigated so far. The aim of this work was to study the prevalence

  2. Diagnóstico rápido de citomegalovirus (CMV en pacientes inmunocomprometidos mediante anticuerpos monoclonales que reconocen proteinas precoces virales Rapid diagnosis of cytomegalovirus infection in immunocompromised patients by using monoclonal antibodies against early viral antigens

    Directory of Open Access Journals (Sweden)

    Maritza Alvarez

    1989-06-01

    Full Text Available Se aplicó la técnica de detección de antigenos precoces fluorescentes (DAPF usando el anticuerpo monoclonal E-13 McAb, mediante el cual se lograron detectar 15 casos positivos a CMV de 75 muestras de orina o sangre ("buffy coat" tomadas de 52 pacientes inmunocomprometidos ingresados en el Instituto de Nefrología de ciudad Habana. Aplicando las técnicas clásicas de aislamiento en fibroblastos humanos diploides (MRC-5, se lograron aislar 12 cepas de CMV de casos previamente positivos por DAPF; lográndose además un aislamiento en una muestra reportada negativa por fluorescencia. Se observó una coincidencia de un 80% entre ambas técnicas. Se detectó la presencia de anticuerpos IgG contra CMV en todos los casos estudiados, utilizando para ello la técnica ELISA.A technique was applied to detect early fluorescent antigens (DEFA of cytomegalovirus (CMV using the E13 monoclonal antibodies in 52 immunocompromised patients hospitalized in the Nephrology Institute of Havana. Of the 75 urine or blood (buffy coat samples taken, 15 were found positive to CMV. Using classical diploide human fibroblast isolation technique, 12 CMV strains were isloation of previously detected positive samples by DEFA. In addition, CMV was isolated from one sample reported to be negative by DEFA. A coincidence of 80% was found between both techniques. With the ELISA test, all the sample studied have IgG antibodies to CMV.

  3. Relationships of systemic IgG antibody response and lesions caused by Oestrus ovis L. larvae (Diptera: Oestridae in infected goats - Interacciones de la respuesta sistémica de anticuerpos IgG y las lesiones causadas por larvas de Oestrus ovis L. (Diptera: Oestridae en cabras infectadas

    Directory of Open Access Journals (Sweden)

    Angulo-Valadez, Carlos E

    2009-11-01

    Full Text Available SummaryThis is the abstract, Oestrus ovis (Diptera: Oestridae is a nasosinusalparasite of sheep and goats that affects the wellbeing andperformance of the hosts. Our objectives were (1 to analyzeassociations of host phenotypic characteristics (age, weight, sex, O.ovis larval characteristics, systemic antibody IgG response, andlesions in sinusal and horn cavities in naturally infected goats, and (2to estimate the serodiagnostic value of salivary gland antigens foroestrosis diagnosis by ELISA test in goats naturally exposed to O.ovis infection. O. ovis third-instar larvae (L3 were collected, thendissected to remove the salivary gland and to obtain the antigenssource (SGC. A total of 251 goats were necropsied. The host’sweight, age and sex were individually recorded. The sinusal and horncavities were examined for the presence of O. ovis larvae. Cavitarylesions and lesion intensity in infected goats (n=38 were scoredaccording to a severity table. Sera (n=125 were analyzed by ELISAto detect specific humoral IgG responses. Annual prevalence of goatoestrosis was 73.9%. A low positive association (r=0.38, P<0.05was observed between larval burden and severity of sinus lesions. Ingeneral, high sensitivity (90.82% and low specificity (25.93% wereobserved in ELISA. As conclusions, major pathological damages caused by O. ovis were associated with the presence of early L2 andearly L3 larvae, probably enhanced by larval molting. SGC antigenswere proven valuable antigens for oestrosis diagnosis by ELISA test ingoats.ResumenOestrus ovis (Diptera: Oestridae es un parásito nasosinusal de lascabras y las ovejas que afecta el bienestar y el rendimiento de sushospedadores. Nuestros objetivos fueron (1 analizar las asociacionesde características fenotípicas del hospedador (peso, sexo, edad,características larvarias de O. ovis, la respuesta de IgG, y las lesionesen las cavidades sinusales y cornuales de cabras infectadas, y (2estimar el valor de los antígenos de

  4. OBTENCIÓN DE ANTICUERPOS POLICLONALES IgY ANTIPARVOVIRUS CANINO A PARTIR DE YEMA DE HUEVO DE GALLINA

    Directory of Open Access Journals (Sweden)

    Pinto, J.

    2005-06-01

    Full Text Available Inmunizando un grupo de diez gallinas de postura raza Lohmann de 16 semanas de edad con parvovirus canino (CPV cepa vacunal, se obtuvieron anticuerpos IgY policlonales contra CPV en yema de huevo.En la extracción de los anticuerpos de la yema se requirieron dos pasos, el primero para la remoción de lípidos y el segundo para la precipitación de proteínas. Para la remoción de lípidos se usó el método PBS:Cloroformo y para la precipitación de los anticuerpos solubles (Inmunoglobulinas-IgY se usó el método de salting-out con sulfato de amonio ((NH42SO4. La evaluación del proceso se efectuó empleando el método comercial estándar “EGGstract IgY Purification System®” de PROMEGA.La metodología empleada permitió la obtención de anticuerpos IgY policlonales contra CPV a partir de yema de huevo de gallina en concentraciones altas por mililitro de yema, con una pureza aceptable y títulos altos; los resultados fueron comparables con el método comercial.

  5. Asociación entre la presencia de anticuerpos anti-Ras y anti-VPH16 E4/E7 y lesiones intraepiteliales del cérvix

    Directory of Open Access Journals (Sweden)

    Vázquez-Corzo Sara

    2003-01-01

    Full Text Available OBJETIVO: Determinar si anticuerpos séricos contra E4, E7 y Ras pueden ser utilizados como marcadores de lesiones tempranas del cérvix uterino asociadas al virus del papiloma humano. MATERIAL Y MÉTODOS: Entre marzo de 1999 y abril de 2000 se realizó un estudio sero-epidemiológico de casos y controles en la clínica de displasias del Hospital General Doctor Gea González, en la Ciudad de México, en 116 muestras de suero para evaluar la presencia de anticuerpos anti-E4, E7 y Ras utilizando un ELISA de captura. Se estimaron razones de momios e intervalos de confianza de 95% RESULTADOS: Anticuerpos anti-E7 se asociaron a mujeres con lesiones NIC III, mientras que anticuerpos anti-E4 y anti-Ras fueron más frecuentes en lesiones NIC I-II. Al evaluar el perfil de anticuerpos que presentaron las mujeres, encontramos que a anticuerpos contra dos proteínas predicen la existencia de una lesión NIC I-II, y b la presencia de tres anticuerpos predicen una lesión NIC III. CONCLUSIONES: La detección de anticuerpos séricos contra E4, E7 y Ras en combinación con otras técnicas de diagnóstico, podrían ser de utilidad para detectar oportunamente a mujeres con lesiones tempranas asociadas al Virus del Papiloma Humano y en riesgo de desarrollar cáncer.

  6. Nivel de corte de los ELISAs para cuantificación de anticuerpos inducidos por la vacuna antimeningocócica VA-MENGOC-BC

    Directory of Open Access Journals (Sweden)

    Rolando Ochoa

    2001-06-01

    Full Text Available Para medir el grado de protección inducido por vacunas antimeningocócicas se ha establecido el Ensayo Bactericida en Suero (EBS y se perfeccionan otros ensayos inmunobiológicos, sin embargo, es necesario contar con pruebas sencillas como el ELISA, capaz de evaluar un gran número de muestras. Se estimó el nivel de corte de los ELISAs para la cuantificación de IgG humana contra los antígenos de VA-MENGOC-BC, vacuna antimeningocócica compuesta por vesículas proteicas de membrana externa de meningococo B y polisacárido capsular de meningococo C, con respecto a un panel de muestras de suero de lactantes, caracterizado por Ensayo Bactericida en Sangre Total (EBST. Los valores correspondientes a la máxima sensibilidad y especificidad fueron respectivamente; 2 μg/mL y 12 μg/mL para antipolisacárido C, y 1000 U/mL y 7000 U/mL para antiproteínas de membrana externa. La mayor coincidencia se obtuvo con 6 μg/mL y 2500 U/mL. Se evaluó otro panel de muestras de suero de adolescentes entre 14 y 18 años, por ELISA y EBS para Neisseria meningitidis serogrupos B y C, alcanzándose una buena concordancia. Doce años después de la inmunización con VA-MENGOC-BC persiste una importante concentración de anticuerpos contra los antígenos vacunales en los sueros estudiados.

  7. Evaluación de la eficacia de la prueba de inmunodifusión en gel agar para la detección de anticuerpos contra el virus de la leucosis enzootica bovina Assessment of the Efficacy of the Agar Gel Immunodiffusion Test for the Detection of Antibodies Against the Enzootic Bovine Leukosis Virus

    OpenAIRE

    Zoraida Nava; César Obando; Magaly Bracamonte; Aurico Sousa; Mayra Hidalgo

    2012-01-01

    contra el virus de la leucosis enzoótica bovina (VLEB), comparándola con el ensayo inmunoenzimático (ELISA). Se procesaron 360 muestras de suero bovino para ambas pruebas, siguiendo las indicaciones del fabricante. El grado de concordancia (GC), valores predictivos (VP) y razones de verosimilitud (RV) fueron determinados y analizados. El GC entre ambas pruebas resultó ser del 86,4%, con un coeficiente Kappa (K) = 0,7. La IDGA detectó una significativa (P

  8. Distribución heterogénea de la prevalencia de anticuerpos contra Trypanosoma cruzi en donadores de sangre en Puebla, México Heterogeneous distribution of the prevalence of anti-Trypanosoma cruzi antibodies among blood donors in the State of Puebla, Mexico

    Directory of Open Access Journals (Sweden)

    Víctor M Monteón

    2005-04-01

    Full Text Available OBJETIVO: Identificar la seroprevalencia de anticuerpos anti Trypanosoma cruzi (Ac anti-T. cruzi en donadores de sangre que habitan en ámbito rural y suburbano, así como las regiones del estado de mayor riesgo y factores asociados. MATERIAL Y MÉTODOS: Estudio transversal realizado de enero a diciembre de 2003. Se analizaron 2 489 donadores de sangre reclutados en 10 puestos de sangrado del Instituto Mexicano del Seguro Social (IMSS distribuidos en las siete regiones económicas del estado de Puebla, México. Se determinó la seroprevalencia mediante las pruebas serológicas obligatorias del panel viral y, además, para T. cruzi, región de reclutamiento y de origen de los donadores. RESULTADOS: La seroprevalencia de Ac anti-T. cruzi fue de 1.24% (31/2 489 comparable con la obtenida para el virus de la hepatitis C (1.5% y por arriba de la del virus de la inmunodeficiencia humana (0.4% y del antígeno de superficie del virus de la hepatitis B (0.3%. Las regiones de Tehuacán-Sierra Negra y Mixteca fueron las de mayor riesgo con seroprevalencias, por el origen del donador, de 2.6% para T. cruzi, mientras que en los originarios de las regiones Sierra nororiental y Angelópolis no se detectaron casos positivos. Se observó asociación entre ser seropositivo y mayor de 40 años y ser originario de las regiones de Tehuacán-Sierra Negra y Mixteca. CONCLUSIONES: La distribución de seroprevalencia a T. cruzi es heterogénea, oscila desde 0% hasta 2.6%, y se reconoce a Tehuacán-Sierra Negra y Mixteca como las regiones de mayor riesgo.OBJECTIVE: To determine the seroprevalence and associated factors, of antibodies against Trypanosoma cruzi (T. cruzi Ab among blood donors living in rural and suburban areas and risk regions. MATERIAL AND METHODS: A cross-sectional study was conducted from January to December 2003, in 2489 blood donors of seven regions of Puebla, who were evaluated for mandatory viral and T. cruzi serological tests using validated

  9. Haptenos, conjugados y anticuerpos para el fungicida pirimetanil

    OpenAIRE

    Mercader Badia, Josep Vicent; Abad Fuentes, Antonio; Abad Somovilla, Antonio; Agulló, Consuelo

    2012-01-01

    La presente invención se refiere a haptenos, conjugados, derivados marcados y anticuerpos para pirimetanil. Así mismo, la presente invención también se refiere al uso de conjugados de pirimetanil como antígenos de ensayo o inmunógenos para obtener anticuerpos de este fungicida; y al uso de los derivados marcados de pirimetanil como antígenos de ensayo. Además, la presente invención también se refiere a un método de análisis de pirimetanil utilizando los anticuerpos obtenidos, en ocasiones jun...

  10. Haptenos, conjugados y anticuerpos para el fungicida ciprodinil

    OpenAIRE

    Mercader Badia, Josep Vicent; Abad Fuentes, Antonio; Abad Somovilla, Antonio; Agulló, Consuelo

    2011-01-01

    La presente invención se refiere a haptenos, conjugados, derivados marcados y anticuerpos para ciprodinil. Así mismo, la presente invención también se refiere al uso de conjugados de ciprodinil como antígenos de ensayo o inmunógenos para obtener anticuerpos de este fungicida; y al uso de los derivados marcados de ciprodinil como antígenos de ensayo. Además, la presente invención también se refiere a un método de análisis de ciprodinil utilizando los anticuerpos obtenidos, en ocasiones junto c...

  11. Anticuerpos ANTI-HTLV-I/II en una población del Amazonas colombiano

    Directory of Open Access Journals (Sweden)

    Abraham Blank

    2004-03-01

    Full Text Available

    En Colombia ya son varias las regiones donde se ha informado la presencia de la infección por los retrovirus linfotrópicos humanos tipos I y II (HTLV-I y HTLV-II. La principal región endémica para HTLV-I es el sur de la costa pacífica. El HTLV-II se ha encontrado en grupos indígenas que viven en diferentes regiones rurales como en la Guajira, la Orinoquía, en la costa pacífica y en una familia en Cali (urbana. Hasta el momento los estudios hechos en el Amazonas colombiano no habían confirmado la presencia de estos retrovirus. Se pretende estudiar la presencia de anticuerpos contra HTLV-I y/o HTLV-II utilizando una prueba comercial de Western blot que confirma y diferencia la infección por cada uno de los dos retrovirus mencionados, en caso de encontrar pruebas reactivas en pruebas de tamización.

    Luego de aceptar la participación en este estudio, se buscó la presencia de anticuerpos contra los retrovirus HTLV-I/II con pruebas de tamización en un total de 401 muestras de suero de personas que atendieron al Hospital de Leticia y a la consulta médica en Puerto Nariño. La muestra correspondió a 238 personas de raza mestiza y 163 de origen amerindio. Se realizaron pruebas de ELISA y/o aglutinación de partículas. Las muestras con pruebas de tamización reactivas, se sometieron a un estudio confirmatorio de la infección mediante el estuche comercial de Western blot Problot 2.4 de GeneLabs. En una mujer amerindia se demostró anticuerpos contra el HTLV-II, enun hombre mestizo contra el HTLV-I y en otro hombre mestizo contra el HTLV-II. No había enfermedad asociada en las personas estudiadas.

    La prevalencia de infección por los HTLV en la muestra estudiada fue 0.75%. Aunque este porcentaje no es muy elevado, debe

  12. Avaliação eosinofílica e soropositividade para anticorpos IgG anti-toxocara em crianças atendidas pelo Sistema Único de Saúde Evaluación eosinófila y suero-positividad para anticuerpos igG anti-toxocara en niños atendidos por el Sistema Único de Salud Eosinophilic count and seropositivity for IgG antibodies to toxocara spp. in children assisted at the public health service

    OpenAIRE

    Ariella Andrade Marchioro; Cristiane Maria Colli; Salete Mattia; Márcia Liz Paludo; Gisely Cardoso de Melo; Carolina Moreira Adami; Sandra Marisa Pelloso; Ana Lúcia F. Guilherme

    2011-01-01

    OBJETIVO: Verificar a associação entre a presença de eosinofilia e a soropositividade para anticorpos IgG anti-Toxocara spp. em crianças atendidas pelo Sistema Único de Saúde no Noroeste do Paraná, Brasil. MÉTODOS: Estudo retrospectivo com crianças de sete meses a 12 anos, atendidas pelo Sistema Único de Saúde do Noroeste do Paraná, com teste ELISA para a pesquisa de anticorpos IgG anti-Toxocara spp. e contagem de eosinófilos (eosinofilia >600 células/mm³). RESULTADOS: Entre as 1.199 crianças...

  13. Lactobacillus plantarum CECT7315 and CECT7316 stimulate immunoglobulin production after influenza vaccination in elderly Lactobacillus plantarum CECT7315 y CECT7316 estimula la producción de inmunoglobulinas tras la vacunación contra la influenza en ancianos

    Directory of Open Access Journals (Sweden)

    M. Bosch

    2012-04-01

    /Wisconsin/67/2005 NYMC X-161B (H3N2, A/Solomon Islands/3/2006 (H1N1 and B/Malaysia/2506/2004 durante la campaña española de vacunación 2006/2007. El consumo del probiótico empezó entre tres y cuatro meses después de la vacunación. Los voluntarios fueron distribuidos aleatoriamente en tres grupos: grupo A (recibieron 5*10(9 ufc/día de L. plantarum CECT 7315/7316 en 20 g de leche desnatada en polvo, grupo B (recibieron 5*10(8 ufc/día de L. plantarum CECT 7315/7316 en 20 g de leche desnatada en polvo y grupo C o placebo (recibieron 20 g de leche desnatada en polvo. Los participantes consumieron el probiótico durante 3 meses. Resultados: El consumo de L. plantarum CECT 7315/7316 durante tres meses después de la vacunación contra influenza incrementó los niveles de anticuerpos IgA y IgG específicos contra la influenza. Además, se observó una tendencia hacia un incremento en los niveles de anticuerpos IgM específicos contra la influenza. Conclusiones: Las cepas de L. plantarum CECT 7315/7316 tienen un efecto inmunoestimulador y podrían utilizarse para mejorar la respuesta a la vacuna contra la influenza en ancianos.

  14. Prevalencia de anticuerpos IgG al toxoide tetánico en trabajadores sanitarios

    OpenAIRE

    B. Pérez Bermúdez; M.ª J. Almodóvar Carretón; Octavio Ramón de Fata; Santiago Vila Duplá; Carmen Martínez López; A. Aranda Vizcaíno

    2014-01-01

    Introducción: En el año 2009 el Ministerio de Sanidad y Consumo de España publica una nueva guía para la vacunación de la Difteria y Tétanos. Existen discrepancias con los tiempos de inoculación de las dosis de recuerdo con otros países y sociedades médicas. Material y métodos: Estudio descriptivo. Las variables analizadas fueron: IgG-Toxoide Tetánico, tiempo última dosis de vacunación, dosis totales, edad, sexo, hospital, habito tabáquico e índice de masa corporal. Se construyó un modelo de ...

  15. Anticuerpo anticitrulina y manifestaciones extra articulares en artritis reumatoidea

    Directory of Open Access Journals (Sweden)

    María Jezabel Haye Salinas

    2013-02-01

    Full Text Available Los pacientes con artritis reumatidea (AR pueden desarrollar manifestaciones extra articulares (MExA, relacionadas a su morbi-mortalidad. Los anticuerpos anti-péptidos citrulinados cíclicos (ACCP son específicos para la AR y estan relacionados con el daño articular; y podrían tener rol patogénico en las MExA. Nuestro objetivo fue determinar la relación entre los anticuerpos ACCP y MExA en pacientes con AR. Se incluyeron 74 pacientes con diagnóstico de AR (ACR 1987 mayores de 18 años, de más de 6 meses de evolución, con MExA, y un control apareado por sexo y edad sin MExA por cada paciente. Las variables demográficas, clínicas y de laboratorio se compararon con test t, chi cuadrado o Mann-Whitney. Se realizó análisis multivariado; p ≤ 0.05. Los pacientes con MExA presentaron mayor título de anticuerpo ACCP (116 vs. 34, p < 0.01 y de factor reumatoideo (FR (108 vs. 34.5, p < 0.01. En el análisis multivariado hubo asociación entre la presencia de MExA y tabaquismo activo (p = 0.02, OR: 3.78, IC 95%: 1.17-12.2, FR positivo (p = 0.04, OR: 3.23, IC95%: 1.04-11.8 y anticuerpo ACCP positivo (p = 0.04, OR: 3.23, IC 95%: 1.04-10. Presentaron mayor título de anticuerpo ACCP que los controles los pacientes con xerostomía (109 vs. 34, p = 0.04, xeroftalmia (150 vs. 34, p < 0.01, nódulos sub-cutáneos (NSC (141 vs. 34, p < 0.01 y fibrosis pulmonar (158 vs. 34, p = 0.04. En conclusión, el anticuerpo ACCP positivo, el FR positivo y el tabaquismo activo fueron factores de riesgo independientes para el desarrollo de MExA.

  16. Asma y deficiencia de subclases de IgG Asthma and IgG subclases deficiency

    Directory of Open Access Journals (Sweden)

    Lucía Santamaría Ortiz

    1995-04-01

    Full Text Available

    Se estudiaron 45 pacientes asmáticos adultos de difícil manejo, de más de 5 años de evolución, 37 de ellos esteroide dependientes y 8 no dependientes, con asma alérgica o intrínseca y algunos con Infecciones respiratorias recurrentes de predominio viral. Por nefelometría se midieron los niveles séricos de las IgsG, M y A, y por ELISA se determinó la IgE total. Se encontraron 4 pacientes con deficiencia de IgG total, en el grupo de los esteroide dependientes. Mediante ELISA tipo sandwich y con anticuerpos monoclonales específicos para las sub clases de IgG se investigaron los niveles sé ricos de IgG1, 2, 3 y 4. En el 55.6% de los enfermos se encontraron una O más deficiencias de sub clases. No hubo diferencias significativas entre los grupos esteroide y no esteroide dependientes, ni entre los asmáticos alérgicos e intrínsecos, ni entre los con infección recurrente o sin ella. predominó la deficiencia de IgG1; en total el 46.7% de los pacientes tenían deficiencia aislada o combinada de IgG1, el 31.1% de IgG2, el 24.4% de IgG3 y el 17.8% de Igd4. La alta incidencia de deficiencia de sub clases podría deberse a la acción de los esteroides o a una alteración en la regulación de la síntesis de Igs producida por un defecto Inmune primario. Esta deficiencia sería la responsable del comportamiento agresivo de la enfermedad.

    We studied 45 adult asthmatic patients with difficult to care disease and who had more than five years of evolution; they suffered from elther allergic or intrinsic asthma and some had experienced recurrent respiratory tract infections. predominantly of viral etiology. Serum levels of IgA, IgG and IgM were measured by nephelometry and total lgE was determined by an Enzyme-Linked immunosorbent Assay (ELISA. Total lg

  17. Biosensor para la detección de anticuerpos anti-VIH

    OpenAIRE

    Laczka, Olivier; Campo García, Francisco Javier del; Muñoz Pascual, Francisco Javier; Villaverde Corrales, Antonio P.; Ferrer Miralles, Neus; Ferraz Colomina, Rosa María

    2008-01-01

    Biosensor para la detección de anticuerpos anti-VIH. En la presente invención se provee un biosensor capaz de detectar anticuerpos anti-VIH en una muestra biológica, basado en la utilización combinada de una enzima alostérica, modificada genéticamente, y una matriz con redes de microelectrodos.

  18. Método para generar anticuerpos monoclonales que reconocen antígenos de membrana de células progenitoras neurales, anticuerpos producidos por dicho método, y usos

    OpenAIRE

    Silva, Augusto; García Benzaquen, Leyre; Valle, Ignacio del

    2008-01-01

    Método para generar anticuerpos monoclonales que reconocen antígenos de membrana de células progenitoras neurales, anticuerpos producidos por dicho método, y usos. La presente invención se refiere a un método para generar anticuerpos monoclonales que reconocen específicamente antígenos de membrana de células progenitoras neurales, a los anticuerpos producidos por dicho método, entre ellos, los anticuerpos aquí denominados NILO1 y NILO2, y depositados en la autoridad internacional de dep...

  19. Thyroid autoantibodies in autoimmune diseases Anticuerpos antitiroideos en enfermedades autoinmunes

    Directory of Open Access Journals (Sweden)

    Regina M. Innocencio

    2004-06-01

    Full Text Available Abnormalities in the thyroid function and thyroid autoantibodies have been frequently described in patients with autoimmune diseases but seldom in antiphospholipid syndrome patients. In order to determine the prevalence of thyroid function and autoimmune abnormalities, we compared serum thyrotropin (TSH, serum free thyroxine (T4 levels, thyroid antithyroglobulin (TgAb and antithyroperoxidase (TPOAb levels of 25 patients with systemic sclerosis, 25 patients with rheumatoid arthritis and 13 patients with antiphospholipid syndrome to a control group of 113 healthy individuals. Evaluation included a thorough clinical examination with particular attention to thyroid disease and a serologic immune profile including rheumatoid factor, antinuclear and anticardiolipin antibody measurements. Subclinical hypothyroidism (4.2Ciertas anormalidades en la función tiroidea y anticuerpos antitiroideos han sido frecuentemente descriptos en pacientes con enfermedades autoinmunes, y más raramente en pacientes con el síndrome antifosfolipídico. Para determinar la prevalencía de anormalidades en la función tiroidea y de autoinmunidad, comparamos los niveles séricos de tirotropina (TSH tiroxina libre en suero (T4 anticuerpos antitiroglobulina (TgAb y antitiroperoxidasa (TPOAb en 25 pacientes con esclerosis sistémica, 25 pacientes con artritis reumatoidea y 13 pacientes con el síndrome antifosfolipídico con un grupo control de 113 individuos aparentemente sanos. La evaluación incluyó un completo examen clínico con particular atención para las enfermedades de la tiroides y una evaluación inmunológica incluyendo dosaje del factor reumatoideo, anticuerpos antinucleares y anticardiolipina. Hipotiroidismo subclínico (4.2anticuerpos anti-tiroglobulina (TgAb y/o anti-peroxidasa (TPOAb estaban presentes en 21/63 (33% de los

  20. Violencia contra las mujeres

    OpenAIRE

    Di Ciaccia, Antonio

    2016-01-01

    A partir de considerar las paradojas del orden simbólico, este texto aborda la violencia contra las mujeres, pero no solamente como un dato de estructura, y resitúa esa violencia en conexión con el llamado por Freud “rechazo a la femineidad”.

  1. Respuesta de anticuerpos inducidos por la vacuna antimeningocócica cubana VA-MENGOC-BC® frente a la cepa de Neisseria meningitidis B:4:P1.19,15 en adolescentes después de 12 años de inmunizados

    Directory of Open Access Journals (Sweden)

    María A. Camaraza

    2006-12-01

    Full Text Available Se estudió la respuesta de anticuerpos inducida por la vacuna antimeningocócica cubana VA-MENGOC-BC® contra la cepa de Neisseria meningitidis B:4:P1.19,15 mediante el Ensayo Bactericida del Suero (EBS y ELISA de tipo indirecto, para medir anticuerpos contra vesículas de membrana externa (VME de N. meningitidis B a 184 adolescentes de un politécnico de Ciego de Ávila que fueron inmunizados en campañas masivas 12 años antes. Se realizaron extracciones de sangre antes de aplicar la primera dosis (T0, 4 semanas después de ésta (T1 y 4 semanas después de la segunda dosis (T2. Transcurridos 12 años de esta vacunación el 42% de los adolescentes presentó títulos bactericidas ≥ 1:4 frente a la cepa homóloga (B:4:P1.19,15 y el 98% mostró anticuerpos detectables contra las VME. En el EBS; el porcentaje de seroconversión T1/T0 fue del 57% y T2/T0 del 60%. Mediante ELISA la seroconversión fue del 59% y 54%, respectivamente, por lo que se demostró que la aplicación de una sola dosis después de 12 años indujo una respuesta inmune importante que puede sugerir una respuesta anamnésica.

  2. Asociación entre la presencia de anticuerpos anti-Ras y anti-VPH16 E4/E7 y lesiones intraepiteliales del cérvix Association between anti-Ras and anti-HPV16 E4/E7 antibodies with cervical intraepithelial lesions

    Directory of Open Access Journals (Sweden)

    Sara Vázquez-Corzo

    2003-10-01

    Full Text Available OBJETIVO: Determinar si anticuerpos séricos contra E4, E7 y Ras pueden ser utilizados como marcadores de lesiones tempranas del cérvix uterino asociadas al virus del papiloma humano. MATERIAL Y MÉTODOS: Entre marzo de 1999 y abril de 2000 se realizó un estudio sero-epidemiológico de casos y controles en la clínica de displasias del Hospital General Doctor Gea González, en la Ciudad de México, en 116 muestras de suero para evaluar la presencia de anticuerpos anti-E4, E7 y Ras utilizando un ELISA de captura. Se estimaron razones de momios e intervalos de confianza de 95% RESULTADOS: Anticuerpos anti-E7 se asociaron a mujeres con lesiones NIC III, mientras que anticuerpos anti-E4 y anti-Ras fueron más frecuentes en lesiones NIC I-II. Al evaluar el perfil de anticuerpos que presentaron las mujeres, encontramos que a anticuerpos contra dos proteínas predicen la existencia de una lesión NIC I-II, y b la presencia de tres anticuerpos predicen una lesión NIC III. CONCLUSIONES: La detección de anticuerpos séricos contra E4, E7 y Ras en combinación con otras técnicas de diagnóstico, podrían ser de utilidad para detectar oportunamente a mujeres con lesiones tempranas asociadas al Virus del Papiloma Humano y en riesgo de desarrollar cáncer.OBJECTIVE: To evaluate whether serum antibodies anti-E4, E7 and Ras could be used as markers for early cervical lesions associated with HPV (human papillomavirus. MATERIAL AND METHODS: A seroepidemiological case-control study was conducted between March 1999 and April 2000 at the dysplasia clinic of Hospital General Doctor Gea Gonzalez, in Mexico City, to evaluate the presence of antibodies anti-E4, E7, and Ras through a sandwich ELISA. Analysis was done using odds ratios and 95% confidence intervals. RESULTS: Anti-E7 antibodies were associated to women with CIN III lesions, while anti-E4 and Ras antibodies were strongly associated with CIN I-II lesions. The antibody profile of women with different

  3. Literatura contra desarraigo.

    Directory of Open Access Journals (Sweden)

    Xosé A. Perozo Ruiz.

    2008-01-01

    Full Text Available Las reflexiones contenidas en Literatura contra desarraigo son una clara interpretación propia realizadas por Xosé A. Perozo. Nacidas del ejercicio literario constante y productivo nos acerca a conceptos actuales como el nacionalismo o la España de las Autonomías. Desde la lejanía, asistimos a la recuperación de la memoria social extremeña, que se trasluce en las novelas del autor son expuestas de manera biográfica en este artículo metaliterario, donde se detiene en la saga de Los Lancharro, o el personaje de Cerrato, ambientadas en la zona geográfica de la Campiña Sur de la Guerra Civil y posguerra.

  4. Desarrollo de superficies modificadas oro - anticuerpo anti-PSPB para su uso como biosensor en la detección de preñez bovina

    Directory of Open Access Journals (Sweden)

    Justo Laíz

    2011-05-01

    Full Text Available En este trabajo se presentan los resultados preliminares para el desarrollo de un biosensor amperométrico destinado a la cuantificación de Proteína B Específica de la Preñez (PSPB en fluidos biológicos como medio de diagnóstico clínico precoz de la preñez bovina. A la superficie de oro modificada con ácido mercaptoundecanoico (MUA se fijaron anticuerpos anti-PSPB y peroxidasa de rábano (HRP. Se verificó la inmovilización de las biomoléculas mediante voltamperometría cíclica y medida del ángulo de contacto.Se estudió el comportamiento electroquímico del electrodo desarrollado por medio de voltamperometría cíclica y medidas a potencial constante, estableciendo la relación entre el cambio de corriente catódica (al potencial de reducción de la quinona y la concentración de PSPB. Esta relación se ve afectada por la formación de complejos antígeno – anticuerpo que limitan el acceso del sustrato al sitio activo de la enzima, provocando una disminución en la señal eléctrica.El electrodo modificado de oro - anti-PSPB – HRP respondió de forma inversamente proporcional a la concentración de PSPB a un potencial de -200 mV (contra electrodo de referencia Ag/AgCl, tanto por voltamperometría cíclica como a potencial constante, y por tanto podría ser la base para el desarrollo de un biosensor amperométrico para detectar precozmente la preñez bovina.

  5. DETERMINACIÓN DEL CATABOLISMO DE LOS ANTICUERPOS MATERNOS Y SU INTERACCIÓN CON DIFERENTES PLANES VACUNALES PARA LA ENFERMEDAD DE GUMBORO EN POLLOS DE ENGORDE

    Directory of Open Access Journals (Sweden)

    Robin O. J.

    2006-11-01

    Full Text Available Con el in de evaluar el catabolismo de los anticuerpos maternos y su interferencia con tres planes vacunales diferentes contra la enfermedad de Gumboro se realizó un estudio utilizando pollos de la estirpe Ross 308, divididos en cuatro grupos: grupo 1: control (sin vacuna; grupo 2: vacunado los días 1, 7 y 15; grupo 3: vacunados los días 1 y 12; y grupo 4: vacunado el día 12. En el primer experimento el biológico se suministró en el agua de bebida, y en el segundo se hizo en el pico. Se sacriicaron 15 aves de cada grupo a los 1, 12, 21 y 42 días de edad y se evaluó peso corporal, tamaño y peso de la bolsa de Fabricio, relación peso bolsa/peso corporal (PB/PC, grado de depleción linfoide, presencia de cepas estándar y/o variantes del virus y los títulos de anticuerpos para la enfermedad de Gumboro. El catabolismo de los anticuerpos maternos ocurrió entre los 21 y 28 días de edad. En los grupos vacunados no se evidenció una respuesta inmune activa frente a ningún plan vacunal. La relación PB/PC no indicó atroia de la bolsa en el experimento 1, aunque las lesiones histopatológicas en el último muestreo fueron grado 3; en el segundo experimento solamente el grupo 3 presentó una disminución en la relación PB/PC; las lesiones histopatológicas en el tercer y cuarto muestreos, en todos los grupos, fueron clasiicadas como grado 3 y 4. En los dos experimentos se detectó la presencia de cepas tanto clásicas como variantes y una baja respuesta humoral. Ninguno de los tres planes vacunales conirió adecuada protección a las aves.

  6. Neosporosis canina: Presencia de anticuerpos sericos en poblaciones caninas rurales y urbanas de Chile Neosporosis canine: detection of sera antibodies in rural and urban canine population of chile

    Directory of Open Access Journals (Sweden)

    A.N. Patitucci

    2001-01-01

    Full Text Available Neospora caninum es un protozoo parásito cuya infección se ha reportado en vacunos, caninos y otras especies en diversas partes del mundo. Los perros actúan como huéspedes definitivos e intermediario a la vez. En esta especie la enfermedad se caracteriza por paresia y/o parálisis de los miembros posteriores y puede ser fatal tanto en cachorros infectados transplacentariamente como en adultos. En Chile, no existe información sobre Neospora en caninos pero se ha demostrado la presencia de anticuerpos contra el protozoo en bovinos, por tal motivo se propuso la identificación de la infección mediante la detección de anticuerpos séricos contra N. caninum en perros. Se estudiaron 201 sueros caninos de diferentes edades, sexo, raza, ambiente ("rural" vs. "urbano" y tipo de alimentación ("carne cruda" vs. "no cruda" en una dilución 1:50 mediante la técnica de Inmuno Fluorescencia Indirecta (IFA. Del total de perros estudiados, el 18% (36/201 presentó anticuerpos contra N. caninum. Además se demostró asociación entre la cantidad de positivos y el ambiente y con el tipo de alimentación; no obstante, no hubo relación con el sexo, raza y edad. Los resultados indican que el pertenecer al ambiente rural y/o consumir carne cruda pueden ser importantes factores de riesgo dentro de la epidemiología de la infección por N.caninum. Complementariamente se procesaron dos sueros de zorros (Pseudolapex fulvipes mediante la técnica del Aglutinación de taquizoitos de Neospora (NAT que resultaron positivos hasta la máxima dilución analizada (1:320, demostrando que los animales estaban infectados al momento de la toma de muestra y abriendo interrogantes en la epidemiología de la enfermedad a nivel local.Neospora caninum is a protozoan parasite whose infection has been detected in canine, bovine and others species around the world. In Chile, the presence of the disease has been already demonstrated in cows of the IX Region of the country. In the

  7. Caracterización parcial de inmunoglobulinas G (IGy específicas contra la lectina de Salvia bogotensis a partir de huevos de gallina (Gallus domesticus

    Directory of Open Access Journals (Sweden)

    Pérez Gerardo

    2004-12-01

    Full Text Available Partiendo de yemas de huevos de gallinas inoculadas con la lectina presente en Salvia bogotensis, se ensayaron seis métodos de delipidación y extracción de anticuerpos de gallina (IgY. Se escogió la metodología por dilución con agua para continuar con la purificación de anticuerpos,
    debido a la remoción total de los lípidos de la yema y la alta actividad de las IgY contra la lectina de S. bogotensis. Para la purificación de anticuerpos se utilizaron diferentes métodos cromatográficos: cromatografía de intercambio iónico (DEAE Sephacel, hidrofóbica (Fenil Sepharosa 4B, exclusión molecular (Sephacryl S-200 y S-500, tiofílica (T-gel. Se escogió la cromatografía tiofílica ya que permitió la purificación de anticuerpos, para luego continuar con la caracterización de estos (peso molecular de las IgY y sus subunidades, cantidad de carbohidratos totales, punto isoeléctrico, interacción de las IgY con diferentes lectinas de leguminosas. Los valores de peso molecular del anticuerpo y sus subunidades concordaron con los reportes de la literatura. También se determinó el título de la población de IgY con un valor bastante alto en comparación al título de anticuerpos específicos dirigidos contra otro tipo de antígeno. Debido al bajo rendimiento de la cromatografía tiofílica se realizó una cromatografía de afinidad indirecta sobre aMSB Sepharosa 4B con el fin de purificar IgY específicos y continuar con los ensayos de caracterización. Aunque se obtuvieron fracciones eluídas de esta columna no se detectó proteína. Como alternativa para la purificación de anticuerpos se utilizó un soporte de Sephacryl S-200 a alta fuerza iónica. De esta cromatografía se obtuvieron anticuerpos parcialmente puros. Con
    esta fracción de anticuerpo se determinó la cantidad de carbohidratos totales, valor que se encontróalgo alejado al reportado en literatura, mientras el punto isoeléctrico de las IgY se encontró en los

  8. Identificación de nuevos péptidos de una biblioteca de despliegue en fagos con un anticuerpo monoclonal específico a la proteína N del virus PRRS

    Directory of Open Access Journals (Sweden)

    A Villa-Mancera

    2015-01-01

    Full Text Available El objetivo del estudio fue seleccionar de una biblioteca combinatoria de fagos filamentosos clonas que mimeticen la proteína N del virus del Síndrome Respiratorio y Reproductivo Porcino (PRRS utilizando un anticuerpo monoclonal (SDOW17. Se utilizó una biblioteca combinatoria de fagos filamentosos (M13 que expone aleatoriamente péptidos de 7 aminoácidos en la región N-terminal fusionado con la proteína III. Para determinar el efecto del enriquecimiento después de cada ronda de selección, los fagos eluidos fueron titulados; estos se incrementaron de 4,8 x 10³ unidades formadoras de colonias (ufc en la primera ronda a 3,2 x 10(5 ufc en la tercera. Después de tres rondas de selección, 32 clonas fueron picadas al azar, cada clona individual fue amplificada, purificada y titulada. La reactividad de la unión de las clonas a los anticuerpos anti-PRRS fue determinado utilizando un ELISA de fagos. El alineamiento de las clonas secuenciadas con la obtenida del GenBank, ubican a estas en la región aminoterminal y porción media de la proteína N del vPRRS. La secuencia consenso de las 32 clonas seleccionadas fue NYRYQ. Las secuencias de los mimotopos fueron utilizadas para calcular los epitopos de la proteína N, mediante la herramienta bioinformática del servidor Peptiope con el algoritmo PepSurf. Dos epitopos conformacionales contra el anticuerpo monoclonal antiproteína N fueron identificados, localizados en diferentes posiciones y presentados principalmente como hélices a. Los mimotopos seleccionados y epitopos conformacionales podrían ser considerados informativos para el diagnóstico de la enfermedad.

  9. Compuesto bactericida contra Campylobacter jejuni

    OpenAIRE

    Gañan, M.; Carrascosa, Alfonso V.; Martínez-Rodríguez, Adolfo J.

    2008-01-01

    Compuesto bactericida contra Campylobacter jejuni. Uso de algunos compuestos fenólicos como agentes antibacterianos contra C jejuni. Además de sus usos para conservación de alimentos, suplemento alimenticio para animales y para la elaboración de una composición farmacéutica para el tratamiento de enfermedades causadas por C. jejuni, debido a su actividad frente a este microorganismos.

  10. Seguridad post-comercialización de los anticuerpos monoclonales antineoplásicos

    OpenAIRE

    González Iglesias, Verónica

    2015-01-01

    INTRODUCCIÓN: Los primeros anticuerpos monoclonales comercializados en España han sido rituximab, trastuzumab, bevacizumab, cetuximab y panitumumab, en este orden. El estudio de su seguridad en los primeros años postcomercialización es fundamental para definir su relación beneficio/riesgo en las condiciones de uso autorizadas. JUSTIFICACIÓN Y OBJETIVOS: Con el fin de estudiar la seguridad postcomercialización de los anticuerpos monoclonales nos planteamos como objetivos: 1) Analizar las s...

  11. IgG4 Cholangiopathy

    OpenAIRE

    Yoh Zen; Yasuni Nakanuma

    2012-01-01

    IgG4 cholangiopathy can involve any level of the biliary tree which exhibits sclerosing cholangitis or pseudotumorous hilar lesions. Most cases are associated with autoimmune pancreatitis, an important diagnostic clue. Without autoimmune pancreatitis, however, the diagnosis of IgG4-cholangiopathy is challenging. Indeed such cases have been treated surgically. IgG4-cholangiopathy should be diagnosed based on serological examinations including serum IgG4 concentrations, radiological features, a...

  12. Perfil de isotipos de imunoglobulinas e subclasses de IgG na leishmaniose tegumentar americana Immunoglobulin isotype and IgG subclass profiles in american tegumentary leishmaniasis

    Directory of Open Access Journals (Sweden)

    Maria Aparecida de Souza

    2005-04-01

    Full Text Available O presente trabalho avaliou o perfil de anticorpos em amostras de soro de 37 pacientes com diagnóstico clínico confirmado ou compatível com leishmaniose tegumentar americana atendidos no Hospital de Clínicas da Universidade Federal de Uberlândia, MG. Os perfis das classes de imunoglobulinas e subclasses de IgG foram analisados pelo teste ELISA indireto, utilizando-se antígeno solúvel de Leishmania (Leishmania amazonensis. A avidez dos anticorpos foi determinada pelo tratamento com uréia a 6 M, após incubação dos soros com o antígeno. Observou-se que 97%, 94,6%, 57,5 e 21,5% das amostras testadas apresentaram anticorpos anti-Leishmania das classes IgE, IgG, IgA e IgM, respectivamente e, os perfis das subclasses de IgG demonstraram, IgG1>IgG3>IgG2>IgG4. Os anticorpos IgE anti-Leishmania de alta avidez corresponderam a 44,4%. Por outro lado, IgG e IgA anti-Leishmania foram em sua maioria (62,8 e 47,8%, respectivamente, de média avidez. A variação do perfil de isotipos, bem como a avidez das imunoglobulinas refletiu a complexidade da resposta imune humoral contra a leishmaniose tegumentar americana.The present work investigated the serum antibody profiles in 37 patients with American tegumentary leishmaniasis, who were attended at Hospital de Clinicas - Universidade Federal de Uberlandia, MG, Brazil. The immunoglobulin class and IgG subclass profiles were analyzed by indirect ELISA using Leishmania (Leishmania amazonensis soluble antigen. The antibody avidity was determined by 6 M urea treatment after incubation with immunoenzymatic conjugate. It was observed that 97% of the serum samples presented anti-Leishmania antibodies for IgE class, 94.6% IgG, 57.5% IgA and 21.5% IgM class. For IgG subclasses the profiles were in the following order of frequency: IgG1>IgG3>IgG2>IgG4. High avidity of anti-Leishmania IgE antibodies was found in 44.4% of the samples. On the other hand, moderate avidity of specific IgG and IgA was observed in 62

  13. Anticuerpos derivados de pacientes se dirigen a células tumorales

    Science.gov (United States)

    Artículo del blog Temas y relatos de un anticuerpo derivado de pacientes que destruye células tumorales en estirpes celulares de varios tipos de cáncer e hizo lento el crecimiento en modelos murinos de cáncer de cerebro y pulmón sin signo de efectos.

  14. Determinación de anticuerpos anti-β2glicoproteína I en pacientes con síndrome antifosfolípido Anti- β2 glycoprotein antibodies in patients with antiphospholipid syndrome

    Directory of Open Access Journals (Sweden)

    Oscar Uribe Uribe

    2004-09-01

    Full Text Available EL objetivo de este estudio fue comparar la presencia de anticuerpos anti-β2glicoproteína I (anti- β2GPI con las pruebas convencionales de laboratorio de anticuerpos anticardiolipina (aCL y anticoagulante lúpico, y con las manifestaciones clínicas del síndrome antifosfolípido (SAF. Se incluyeron en el estudio 80 mujeres con SAF; 35 de ellas de la consulta de Reumatología y las otras 45 con historia de aborto recurrente espontáneo (ARE; 5 mujeres de la consulta de Reumatología sin SAF, 27 mujeres con ARE, sin SAF y un grupo control de 20 mujeres sanas en edad reproductiva. Se investigaron la presencia de anticuerpos IgG e IgM anticardiolipina (aCL e IgG anti- β2GPI por la técnica de ELISA, y el anticoagulante lúpico por la determinación del tiempo parcial de tromboplastina activado. Adicionalmente, se registraron las manifestaciones clínicas asociadas al SAF. De las pacientes con SAF, 25.7% del grupo de Reumatología (9/35 y 4.4% de las pacientes con ARE (2/45 fueron positivas para anticuerpos anti-β2GPI, mientras que ninguna de las mujeres sin SAF, ni de las mujeres del grupo control, fue positiva. La asociación entre la presencia de anti- β2GPI y los anticuerpos IgG e IgM aCL mostró una diferencia significativa en los títulos de 3+ (altamente positivos en contraste con los individuos negativos para anti- β2GPI. La positividad del anticoagulante lúpico también se correlacionó con la presencia de anticuerpos anti- β2GPI. No hubo diferencia significativa entre las diversas manifestaciones clínicas del SAF y la presencia de dichos anticuerpos. En conclusión, la determinación de anticuerpos anti- β2GPI tiene una alta especificidad en pacientes con SAF pero no se asoció con ninguna manifestación clínica en particular. The objective of this study was to compare the presence of anti-β2glycoprotein (anti- β2GPI antibodies with the conventional laboratory tests of anticardiolipin antibodies (aCL and lupus anticoagulant

  15. La violencia contra las mujeres

    OpenAIRE

    Gil Gómez, Alicia; Escrig Gil, Gemma; Forcada Martínez, Águeda

    2010-01-01

    Las mujeres con diversidad funcional en la agenda jurídico política española: la Ley estatal contra la violencia de género y sus nuevos desafíos,SOLEDAD ARNAU RIPOLLÉS. La violencia contra las mujeres. El estado de la cuestión: Una cuestión de estado. “La violencia en el ámbito laboral”, ENCARNA BARRAGÁN BRITO. El problema de la rehabilitación de los maltratadores, ESPERANZA BOSCH FIOL. La violencia política, LEONORA CASTAÑO CANO. La violencia psicológica, ...

  16. Neuromielitis óptica con alta expresión de acuaporina-4 y anticuerpos anti-acuaporina-4 positivos en suero

    Directory of Open Access Journals (Sweden)

    Alejandra Báez

    2012-04-01

    Full Text Available La presencia de anticuerpos IgG en suero, con blanco en los canales de acuaporina-4, es específica de la neuromielitis óptica (NMO. El 60% de los pacientes con NMO presentan lesiones cerebrales en la resonancia magnética (RM; en un 8% (mayoría niños estas lesiones se consideraron "atípicas". Presentamos dos pacientes con NMO y lesiones en el SNC de alta expresión de acuaporina-4. Caso 1: varón de 50 años, que comenzó con pérdida de visión en ojo derecho (OD. Recibió tratamiento empírico con metilprednisolona 1 g/d x 3 días. Al mes presentó dolor generalizado y hemiparesia derecha; nuevamente recibió metilprednisolona 1 g/d x 5 días e IgG IV 400 mg/kg/d × 5 días. Recuperó la deambulación persistiendo el dolor y fenómenos paroxísticos en los 4 miembros. Potenciales evocados visuales: P100, ojo izquierdo (OI 123 mseg. OD sin respuesta. La RM de cerebro (FLAIR mostró hiperintensidad en nervio óptico derecho, hipotálamo y comisura blanca anterior. RM cervical: lesión medular extensa (5 cuerpos vertebrales. Caso 2: mujer de 53 años, con disminución de la agudeza visual en ambos ojos y parestesias en miembros inferiores que remitieron espontáneamente. Evolucionó al mes con cuadriparesia e incontinencia esfinteriana. Recibió metilprednisolona 1 g/d x 5 días, sin mejoría. Potenciales evocados visuales: P100 OI 124 mseg. OD 128 mseg. RM cerebro: (FLAIR hiperintensidad hipotalámica y periacueductal. RM cervical: lesión medular extensa (7 cuerpos vertebrales. Anticuerpos anti-acuaporina-4 positivos en ambos pacientes (inmunofluorescencia indirecta. Las lesiones consideradas "atípicas", como aquí, en sitios con alta densidad de proteínas canales de agua AQP4 deberán considerarse para el diagnóstico diferencial.

  17. ¿Sabía usted? Anticuerpos antifosfolípidos

    OpenAIRE

    Javier Molina

    1992-01-01

    Los anticuerpos antifosfolípidos comprenden varias poblaciones de inmunoglobulinas, que pueden ocasionar falsos positivos biológicos con el VDRL, interferir con el complejo activador de la protrombina (anticoagulante lúpico) o reaccionar con elfosfolípido cardiolipina en una prueba de enzimoinmunoanálisis (EIA).

  18. PURIFICACIÓN DE IgY CONTRA LA SUBUNIDAD NR3 DEL RECEPTOR NMDA DE CEREBRO DE RATA

    Directory of Open Access Journals (Sweden)

    Gina Méndez C

    2008-04-01

    Full Text Available Objetivo. Obtener anticuerpos tipo IgY contra péptidos sintéticos de las subunidades NR3A y NR3B del receptor NMDA de ratas, para reconocer y seguir la expresión de estas subunidades en extractos de cerebro de rata de diferentes edades. Materiales y métodos. Se diseñaron dos péptidos empleando los sistemas de la base de datos Entrez y el programa ClustalW-PBIL de alineamientos múltiples contra las subunidades NR3A y NR3B del receptor NMDA; una vez sintetizados por el método SSPS-fmoc fueron utilizados para inocular gallinas (Gallus gallus, variedad Hy Line Brown de 16 semanas de edad; al cabo de 57 días postinoculación se purificó IgY específica y se enfrentaron a extractos de cerebro de rata postnatal y adulta. Resultados. Se detectaron las subunidades NR3A y NR3B y se relacionó su expresión con la edad del animal; siendo mayor la expresión de la subunidad NR3A en extracto de cerebro de rata postnatal. No se encontró diferencia marcada en la expresión de la subunidad NR3B en las edades mencionadas. Conclusiones. Esta es la primera investigación que emplea proteína nativa para el reconocimiento de la subunidad NR3 del receptor NMDA, lo cual muestra la especificidad de los anticuerpos generados y contribuye con el entendimiento de las funciones de este receptor y su relación con la regulación de la memoria espacial.

  19. Contra rotative propeller performance estimation

    OpenAIRE

    Coca Casanueva, Vladimir

    2008-01-01

    Due to the continuous increase in the fuel price, the propeller engine solution (the most efficient in fuel saving terms) becomes very attractive to airlines and thus, to aircraft manufacturers. However, airlines aren’t ready to fly an aircraft at lower cruise Mach number than the traditional Mach 0,84, which jeopardizes the fuel efficiency of propellers. At this stage is where the contra-rotative concept appears, which let us to increase the cruise speed while reducing fuel consumption...

  20. Desarrollo de biomodelos para la evaluación de la inmunidad secretora contra M. tuberculosis en ratones Balb/c

    Directory of Open Access Journals (Sweden)

    Annette León

    2000-09-01

    Full Text Available Poco se ha estudiado acerca del papel de los anticuerpos específicos, presentes en las secreciones del aparato respiratorio, en la defensa contra patógenos intracelulares, como es el caso de las micobacterias causantes de la tuberculosis en el hombre: Micobacterium tuberculosis, bovis y africanum. Con el objetivo de desarrollar modelos adecuados para evaluar el posible papel de la inmunidad secretoria en la defensa contra la tuberculosis, se desarrollaron dos modelos animales con la utilización de un anticuerpo monoclonal IgA dirigido contra la proteína de 16 kD de M. tuberculosis y M. bovis. En el primer modelo se inocularon ratones Balb/c, por vía subcutánea al nivel de la nuca, con diferentes cantidades de células del hibridoma TBA61, productor de la IgA específica. En un segundo modelo, se inoculó por vía intraperitoneal líquido ascítico correspondiente a este hibridoma obtenido en ratón. En ambos casos se determinó, a diferentes tiempos, la concentración del monoclonal en saliva y sólo en suero para el segundo. En los dos modelos se demostró el paso del monoclonal a la saliva, donde alcanzó la máxima concentración: a los 21 días en los animales inoculados con el hibridoma, y a las 2 horas en saliva y suero en los animales inoculados con el líquido ascítico. Se sugiere, por su sencillez y mayor inocuidad, el uso del segundo modelo para la realización de estudios de reto por vía mucosal.

  1. Violencia intrafamiliar contra las mujeres

    OpenAIRE

    Omar Huertas Díaz

    2012-01-01

    El presente texto pretende abordar el tema de violencia en contra de las mujeres desde la perspectiva familiar, es decir la violencia intrafamiliar o también llamada doméstica, entendida y afirmada desde la Corte Constitucional, como aquella violencia que causa daño o maltrato físico, psíquico o sexual, trato cruel, intimidatorio o degradante, amenaza, agravio, ofensa o cualquier otra forma de agresión, producida entre miembros de una familia, llámese cónyuge o compañero permanente, padre o m...

  2. Avances en la investigación de inmunoterapias contra las drogas de abuso Research Advances in the Immunotherapies of Addictions

    Directory of Open Access Journals (Sweden)

    Iván D. Montoya

    2010-02-01

    Full Text Available Introducción: Las terapias inmunológicas, ya sea con vacunas (inmunización activa o con anticuerpos (inmunización pasiva, se están investigando activamente para el manejo de las complicaciones del consumo de drogas de abuso. Objetivo: Revisar el estado actual del desarrollo en la investigación de inmunoterapias contra nicotina, cocaína, heroína, metanfetamina y fenciclidina (PCP, con énfasis en los aspectos clínicos de cada una de ellas. Método: Revisión de la literatura sobre el tema. Resultados: Hasta el momento, las inmunoterapias evaluadas en humanos parecen ser seguras desde el punto de vista médico y con eficacia esperanzadora. Por este mecanismo se previene la activación de los mecanismos de refuerzo cerebral asociados con los efectos adictivos de la droga y, eventualmente, la extinción de la adicción. Conclusión: En teoría, las vacunas también podrían ser útiles en la prevención del desarrollo de la adicción al igual que para prevenir las recaídas del uso de drogas. Los anticuerpos monoclonales parecen ser útiles en el tratamiento de las sobredosis de drogas, porque pueden prevenir los efectos neurotóxicos de las drogas al bloquear su acceso al cerebro. Actualmente, se están investigando vacunas contra la cocaína, heroína, metanfetamina y nicotina. Igualmente se están investigando anticuerpos monoclonales contra la cocaína, metanfetamina, nicotina y PCP.Introduction: Immunological therapies, either with vaccines (active immunization or with antibodies (passive immunization, are being actively investigated in the management of complications of drug abuse. Objetive: To review the current state of research development of immunotherapies against nicotine, cocaine, heroin, methamphetamine and phencyclidine (PCP with an emphasis on the clinical aspects. Method: Review the literature about the topic. Results: So far, immunotherapies evaluated in humans appear to be safe from a medical standpoint and effective

  3. Antimalaric antiobodies in school children in El Bagre, Colombia Detección de anticuerpos antimaláricos en un grupo de escolares del municipio de El Bagre, Antioquia

    Directory of Open Access Journals (Sweden)

    Isabel Polanco

    1998-01-01

    Full Text Available A cases and controls study was carried out in 1996 in El Bagre, Colombia, endemic zone for malaria, in order to determine the relationship between nutritional situation and immune response to malaria in 51 children with malaria and 49 without it; IgG and IgM antibodies were determined by means of indirect inmunofluorescence .against P. falciparum antigens (Strain FCB2. Nutritional situation was evaluated according to USA National Center for Health Statistics. No child was found positive for IGM antibodies; concerning IgG response, it was positive in 29 (56.9% malaric children but only in 4 (8.2% of the non-malaric ones (p<0.00001 . Difference was also signjficant (p<0.00001 for malarja antecedents in the previous year (70.6% in malaric children vs 10.2% jn the nonmalaric ones. Of the 29 malaric seropositive children 20 (69% were malnourished (p<0.01 . En 1996, en el municipio de El Bagre (Antioquia-Colombia, zona endémica para malaria y con altos niveles de desnutrición, se realizó un estudio de casos y controles con el objeto de determinar la relación entre el estado nutricional y la respuesta inmune humoral de niños con y sin malaria. Se trabajó con un grupo de 100 niños entre 4 y 9 años de edad, 51 con malaria y 49 sin ella, al cual se le determinaron los niveles de anticuerpos antimaláricos IgG e IgM por la técnica de inmunofluorescencia indirecta (IFI, empleando antigenos de P. falciparum cepa FCB 2 mantenida en cultivo continuo. El estado nutricional se evaluó por comparación de las medidas antropométricas con la referencia de crecimiento del National Center for Health Statistics (NCHS de los Estados Unidos. Los resultados mostraron diferencias en la tasa de positividad de anticuerpos IgG entre los niños maláricos y los no maláricos. En efecto: Veintinueve niños maláricos (56.9% y sólo 4 de los no maláricos (8.2% tenían dichos anticuerpos (P<0.00001 ; la diferencia también fue significativa para el antecedente de

  4. Organ Correlation in IgG4-Related Diseases

    OpenAIRE

    Koizumi, Satomi; Kamisawa, Terumi; Kuruma, Sawako; Tabata, Taku; Chiba, Kazuro; Iwasaki, Susumu; Kuwata, Go; Fujiwara, Takashi; Fujiwara, Junko; Arakawa, Takeo; Koizumi, Koichi; Momma, Kumiko

    2015-01-01

    IgG4-related disease (IgG4-RD) is a potentially multiorgan disorder. In this study, clinical and serological features from 132 IgG4-RD patients were compared about organ correlations. Underlying pathologies comprised autoimmune pancreatitis (AIP) in 85 cases, IgG4-related sclerosing cholangitis (IgG4-SC) in 12, IgG4-related sialadenitis (IgG4-SIA) in 56, IgG4-related dacryoadenitis (IgG4-DAC) in 38, IgG4-related lymphadenopathy (IgG4-LYM) in 20, IgG4-related retroperitoneal fibrosis (IgG4-RF)...

  5. Inmunodeficiencias primarias por déficit de anticuerpos en adultos

    Directory of Open Access Journals (Sweden)

    María Mercedes Bello Rodríguez

    2014-10-01

    Full Text Available Se realizó una investigación sobre los pacientes con inmunodeficiencias primarias por déficit de anticuerpos, atendidos en el servicio de inmunología del Hospital General “Dr. Ernesto Guevara” de Las Tunas, con el objetivo de caracterizar las inmunodeficiencias por déficit de anticuerpos en pacientes adultos, atendiendo al tipo de inmunoglobulina afectada, el sexo y la edad, así como las principales manifestaciones clínicas. Se evaluaron un total de diez pacientes tratados por esta causa entre los años 2005 y 2013. Para la evaluación de los resultados se utilizó el análisis de frecuencias simple. Las inmunodeficiencias diagnosticadas se correspondieron en un 50% con el déficit de las tres clases de inmunoglobulinas. Predominó el sexo masculino en un 70% y las edades más afectadas se correspondieron con la cuarta y quinta décadas de la vida. Las infecciones respiratorias y digestivas fueron las más frecuentes (80%, tanto por gérmenes bacterianos como virales, la infección por Giardia lamblia también apareció muy frecuentemente en los pacientes estudiados

  6. IgG4 Related Sclerosing Cholangitis

    OpenAIRE

    D. Joshi; Webster, G. J. M.

    2014-01-01

    IgG4 related disease (IgG4-RD) is a multisystemic disorder which has only recently been recognized. IgG4 related sclerosing cholangitis (IgG4-SC) is the biliary manifestation of the disease, often in association with autoimmune pancreatitis (AIP). In this review, we provide an overview of IgG4-RD, with a focus on the biliary manifestations. In particular, we describe the important differential diagnoses of IgG4-SC that need to be considered, namely, primary sclerosing cholangitis (PSC) and ch...

  7. Violencia contra inmigrantes en Tamaulipas

    Directory of Open Access Journals (Sweden)

    Simón Pedro Izcara-Palacios

    2012-10-01

    Full Text Available Abstract: Violence against immigrants in TamaulipasMigrants in Mexico are subjected to extortions, kidnappings, rapes and killings. Tamaulipas, a state situated in the northeast of Mexico, has registered an unprecedented level of violence against migrants. In August of 2010, 72 migrants were massacred in San Fernando (Tamaulipas and in April of 2011, 194 corpses of migrants were found in the same place. Furthermore, since 2009, rural communities in central Tamaulipas, which receive more than five thousand migrants a year to work in harvesting oranges, have suffered violent attacks targeting immigrants. This paper, based on a qualitative methodology that includes in-depth interviews with 60 immigrants conducted between April 2011 and November 2011, examines the forms of cultural, direct, structural and post-structural violence suffered by immigrant workers employed in the orange sector of Tamaulipas.Resumen:Los migrantes en México son objeto de extorsiones, secuestros, violaciones y asesinatos. Tamaulipas, un estado situado en el noreste de México, ha registrado niveles sin precedentes de violencia contra los migrantes. En Agosto de 2010 72 migrantes fueron masacrados en San Fernando (Tamaulipas, y en Abril de 2011 194 cadáveres de migrantes fueron encontrados en el mismo lugar. Asimismo, las comunidades rurales del centro de Tamaulipas, que reciben anualmente más de 5 mil migrantes para trabajar en la pizca de la naranja, han sufrido desde el año 2009 violentos ataques dirigidos contra los migrantes. Este artículo, basado en una metodología cualitativa que incluye entrevistas en profundidad con 60 migrantes realizadas entre Abril y Noviembre de 2011, examina las formas de violencia cultural, directa, estructural y postestructural sufrida por los trabajadores migratorios empleados en el sector citrícola de Tamaulipas.

  8. Violencia contra las mujeres y alguien mas...

    OpenAIRE

    Piatti, Mª de Lujan

    2013-01-01

    La violencia contra las mujeres es una clara vulneración a sus derechos humanos. Es una violencia ejercida contra ellas por el solo hecho de ser mujeres; no se trata de casos aislados, sino que constituye un fenómeno social, presente en la sociedad actual sin distinción de razas, lugar geográfico, nivel cultural, religión, sistema político o económico. Investigar sobre “La violencia contra las mujeres y alguien más…”, desde una mirada multidisciplinar, significa bucear en las profundidades de...

  9. Almost contra-g-continuous functions

    International Nuclear Information System (INIS)

    In this paper, we introduce and investigate the notion of almost contra-g-continuous functions which is weaker than both notions of contra-continuous functions [Dontchev J. Contra-continuous functions and strongly S-closed mappings. Int J Math Math Sci 1996;19:303-10] and (θ,s)-continuous functions [Joseph JK, Kwak MK. On S-closed spaces. Proc Am Math Soc 1980;80:341-8.] in topological spaces. We discuss the relationships with some other related functions. At the same time, we show that almost-g-continuity and (LC,s)-continuity are independent of each other.

  10. CIA and the Contras' cocaine connection

    OpenAIRE

    Kain, Victor

    2006-01-01

    The evidence shows that the government knew that the Contras’ decided to traffic cocaine to finance themselves. The government participated in the drug trafficking by not interrupting it. CIA ordered the Contras to traffic drugs. Traffickers were protected from prosecution and received government contract. The government knew and sanctioned the drug trafficking into the US to support the Contras. The White House urged lenience for at least one convicted trafficker and terrorist.

  11. Vacuna contra el VPH (HPV Vaccine)

    Centers for Disease Control (CDC) Podcasts

    2013-07-25

    Desde el 2006, hay una vacuna que protege contra los tipos de VPH que causan cáncer con mayor frecuencia. Este podcast habla sobre la importancia de que los padres hablen con los proveedores de atención médica de sus hijos sobre ponerles la vacuna contra el VPH.  Created: 7/25/2013 by MMWR.   Date Released: 11/4/2013.

  12. Cutoff Values of Serum IgG4 and Histopathological IgG4+ Plasma Cells for Diagnosis of Patients with IgG4-Related Disease

    OpenAIRE

    Hisanori Umehara; Susumu Sugai; Toshihiro Fukushima; Katumi Eguchi; Miyuki Miki; Masao Tanaka; Yoshimasa Fujita; Tomoyuki Sakai; Akio Nakajima; Haruka Iwao; Takafumi Kawanami; Takuji Nakamura; Hiroshi Minato; Naoto Umeda; Akira Hirabayashi

    2012-01-01

    IgG4-related disease is a new disease classification established in Japan in the 21st century. Patients with IgG4-related disease display hyper-IgG4-gammaglobulinemia, massive infiltration of IgG4+ plasma cells into tissue, and good response to glucocorticoids. Since IgG4 overexpression is also observed in other disorders, it is necessary to diagnose IgG4-related disease carefully and correctly. We therefore sought to determine cutoff values for serum IgG4 and IgG4/IgG and for IgG4+/IgG+ plas...

  13. Violencia intrafamiliar contra las mujeres

    Directory of Open Access Journals (Sweden)

    Omar Huertas Díaz

    2012-07-01

    Full Text Available El presente texto pretende abordar el tema de violencia en contra de las mujeres desde la perspectiva familiar, es decir la violencia intrafamiliar o también llamada doméstica, entendida y afirmada desde la Corte Constitucional, como aquella violencia que causa daño o maltrato físico, psíquico o sexual, trato cruel, intimidatorio o degradante, amenaza, agravio, ofensa o cualquier otra forma de agresión, producida entre miembros de una familia, llámese cónyuge o compañero permanente, padre o madre, aunque no convivan bajo el mismo techo, ascendientes o descendientes de estos incluyendo hijos adoptivos, y en general todas las personas que de manera permanente se hallaren integrados a la unidad doméstica. Junto a ello el documento explicará de qué forma afecta esta particular clase de violencia a las mujeres, los abusos y malos tratos que la materializan, y las medidas adoptadas por el Estado Colombiano para enfrentar sus consecuencias, y por último la presentación de los conceptos que maneja la Corte Constitucional en la interpretación de dicho fenómeno.

  14. IgG4-related ophthalmic disease

    OpenAIRE

    Mejico, Luis J.

    2014-01-01

    IgG4-related disease is a fibro-inflammatory condition with tendency to form tumors with inflammatory infiltrate with IgG4 rich plasma cells and elevation of IgG4 level in serum, which may affect virtually every organ and tissue in the organism. IgG4-related ophthalmic disease may present as dacryoadenitis, myositis, other orbital tissues, hypophysitis or pachymeningitis causing cranial neuropathies. The diagnosis of IgG4-related disease is based on a typical clinical scenario, supportive lab...

  15. Evaluación de la seroprotección contra sarampión, rubéola y hepatitis B en niños menores de cinco años del Perú, 2011 Evaluation of the seroprotection against measles, rubella and hepatitis B in children under 5 years of age in Peru, 2011

    Directory of Open Access Journals (Sweden)

    Víctor Fiestas Solórzano

    2012-12-01

    Full Text Available Objetivos. Estimar la prevalencia de anticuerpos contra sarampión, rubéola y hepatitis B en niños de 1 a 4 años del Perú. Materiales y métodos. Se realizó una encuesta nacional basada en la aplicación de un cuestionario y obtención de muestra de sangre capilar en papel de filtro para el estudio de anticuerpos contra sarampión, rubéola y hepatitis B en niños de 1 a 4 años. Se utilizó un muestreo probabilístico, estratificado y multietápico con inferencia a nivel nacional y siete ámbitos de estudio: Lima metropolitana, resto de costa urbana, costa rural, sierra urbana, sierra rural, selva urbana y selva rural. Las muestras de sangre capilar fueron procesadas siguiendo protocolos estandarizados para la determinación de anticuerpos mediante técnica de ELISA utilizando reactivos comerciales. Resultados. Se encontró una prevalencia nacional de 91,6% (IC95%: 90,6-92,7%, 91,3% (IC 95%: 90,3-92,4% y 95,9% (IC 95%: 95,0-96,8% para anticuerpos contra sarampión, rubéola y hepatitis B respectivamente. No se evidenció diferencias significativas de las prevalencias entre los diferentes ámbitos de estudio y en los diferentes estratos socioeconómicos de los conglomerados. Conclusiones. En niños de 1 a 4 años se ha estimado una prevalencia nacional de anticuerpos contra sarampión y rubéola entre 90-93%, mientras que para anticuerpos contra hepatitis B (anti-HBsAg entre 95-97%.Objectives. To estimate the prevalence of antibodies against measles, rubella and hepatitis B in children aged between 1 and 4 years in Peru. Materials and methods. A national survey was conducted based on a questionnaire and capillary blood sample taken on filter paper in order to study antibodies against measles, rubella and hepatitis B in children from 1 to 4 years of age. A stratified, multistage, probability sampling design was used to be representative at the national level and at level of seven ambits, including the Metropolitan Lima Area, the rest of the

  16. Prevalencia de anticuerpos contra Histophilus somni y factores de riesgo en ganado para carne en Yucatán, México

    OpenAIRE

    José Jesús Solís Calderón; José Candelario Segura Correa; Francisco Aguilar Romero; Víctor Manuel Segura Correa

    2008-01-01

    El propósito de este estudio fue investigar la seroprevalencia de la infección por H. somni y determinar algunos factores de riesgo asociados con su seropositividad en ganado para carne en la región ganadera de Yucatán, México. Asimismo, se estimó el coefi ciente de correlación dentro de hatos (re) y el efecto de diseño (D). Los animales se seleccionaron usando un muestreo aleatorio en dos etapas. Las muestras de sangre se recolectaron de 490 animales en 35 hatos, y los sueros se som...

  17. Detección de anticuerpos contra Trypanosoma cruzi utilizando discos de 3 mm en muestras de sangre seca sobre papel de filtro

    OpenAIRE

    Idialis Hernández-Spengler; Lilliam Pozo-Peña; Grisell Ramos-Martínez; Yaranaima Morán-Peraza; Martha Amat-Arenas

    2014-01-01

    La utilización de sangre seca sobre papel de filtro ha despertado gran interés en los últimos años en los inmunoensayos debido a las ventajas que ofrece este modo de presentación de las muestras, lo que permite su utilización en países con recursos limitados para realizar estudios epidemiológicos. En este trabajo, se determinaron las condiciones óptimas de elución de muestras de sangre seca sobre papel de filtro para discos de 3 mm, como referencia se tomaron muestras de suero y las condicion...

  18. Títulos de anticuerpos contra Leptospira sp., en primates del zoológico Matecaña, Pereira, Colombia

    OpenAIRE

    Marlyn Romero P.; Miryam Astudillo H.; Jorge Sánchez V.; Lina González G.; Néstor Varela A.

    2012-01-01

    RESUMENObjetivo. Identificar los serovares más frecuentes de Leptospira sp., por la técnica de Microaglutinación (MAT) en una población de primates neotropicales, mantenida en condiciones de cautiverio, y evaluar por microscopía de campo oscuro la presencia de espiroquetas en aguas para el consumo de los animales. Materiales y métodos. Se realizó un estudio de prevalencia de punto en 65 monos neotropicales, mediante la técnica de Microaglutinación Macroscópica (MAT) usando un cepario de refer...

  19. IgG4-Related Lymphadenopathy

    OpenAIRE

    Tadashi Yoshino; Yasuharu Sato

    2012-01-01

    Lymphadenopathy is frequently observed in patients with immunoglobulin G4-related disease (IgG4-RD) and sometimes appears as the first manifestation of the disease. The diagnosis of IgG4-related lymphadenopathy is complicated owing to a great histological diversity, with at least 5 histological subtypes. Indeed, lymph node biopsy may be performed under the suspicion that the lymphadenopathy is a malignant lymphoma or other lymphoproliferative disorder. The diagnosis of IgG4-RD is characterize...

  20. IgG4-related skin disease.

    Science.gov (United States)

    Tokura, Y; Yagi, H; Yanaguchi, H; Majima, Y; Kasuya, A; Ito, T; Maekawa, M; Hashizume, H

    2014-11-01

    IgG4-related disease (IgG4-RD) is a recently established clinical entity characterized by high levels of circulating IgG4, and tissue infiltration of IgG4(+) plasma cells. IgG4-RD exhibits a distinctive fibroinflammatory change involving multiple organs, such as the pancreas and salivary and lacrimal glands. The skin lesions of IgG4-RD have been poorly characterized and may stem not only from direct infiltration of plasma cells but also from IgG4-mediated inflammation. Based on the documented cases together with ours, we categorized the skin lesions into seven subtypes: (1) cutaneous plasmacytosis (multiple papulonodules or indurations on the trunk and proximal part of the limbs), (2) pseudolymphoma and angiolymphoid hyperplasia with eosinophilia (plaques and papulonodules mainly on the periauricular, cheek and mandible regions), (3) Mikulicz disease (palpebral swelling, sicca syndrome and exophthalmos), (4) psoriasis-like eruption (strikingly mimicking psoriasis vulgaris), (5) unspecified maculopapular or erythematous eruptions, (6) hypergammaglobulinaemic purpura (bilateral asymmetrical palpable purpuric lesions on the lower extremities) and urticarial vasculitis (prolonged urticarial lesions occasionally with purpura) and (7) ischaemic digit (Raynaud phenomenon and digital gangrene). It is considered that subtypes 1-3 are induced by direct infiltration of IgG4(+) plasma cells, while the other types (4-7) are caused by secondary mechanisms. IgG4-related skin disease is defined as IgG4(+) plasma-cell-infiltrating skin lesions that form plaques, nodules or tumours (types 1-3), but may manifest secondary lesions caused by IgG4(+) plasma cells and/or IgG4 (types 4-7). PMID:25065694

  1. Cutoff Values of Serum IgG4 and Histopathological IgG4+ Plasma Cells for Diagnosis of Patients with IgG4-Related Disease

    Directory of Open Access Journals (Sweden)

    Yasufumi Masaki

    2012-01-01

    Full Text Available IgG4-related disease is a new disease classification established in Japan in the 21st century. Patients with IgG4-related disease display hyper-IgG4-gammaglobulinemia, massive infiltration of IgG4+ plasma cells into tissue, and good response to glucocorticoids. Since IgG4 overexpression is also observed in other disorders, it is necessary to diagnose IgG4-related disease carefully and correctly. We therefore sought to determine cutoff values for serum IgG4 and IgG4/IgG and for IgG4+/IgG+ plasma cells in tissue diagnostic of IgG4-related disease. Patients and Methods. We retrospectively analyzed serum IgG4 concentrations and IgG4/IgG ratio and IgG4+/IgG+ plasma cell ratio in tissues of 132 patients with IgG4-related disease and 48 patients with other disorders. Result. Serum IgG4 >135  mg/dl demonstrated a sensitivity of 97.0% and a specificity of 79.6% in diagnosing IgG4-related disease, and serum IgG4/IgG ratios >8% had a sensitivity and specificity of 95.5% and 87.5%, respectively. IgG4+cell/IgG+ cell ratio in tissues >40% had a sensitivity and specificity of 94.4% and 85.7%, respectively. However, the number of IgG4+ cells was reduced in severely fibrotic parts of tissues. Conclusion. Although a recent unanimous consensus of all relevant researchers in Japan recently established the diagnostic criteria for IgG4-related disease, findings such as ours indicate that further discussion is needed.

  2. Contra-rotating propeller; Niju hanten propeller

    Energy Technology Data Exchange (ETDEWEB)

    Sakamoto, Y. [Ishikawajima-Harima Heavy Industries Co. Ltd., Tokyo (Japan)] Kushiyama, H. [Mitsubishi Heavy Industries Ltd., Tokyo (Japan)] Nitta, K. [Sumitomo Heavy Industries Ltd., Tokyo (Japan)

    1998-09-01

    Contra-rotating propeller (CR) is a save energy device where two propellers are set on one shaft and they are contra-rotated, later propeller recovers the unused energy caused by the rotation of first propeller and changes into effective propeller force. Development of optimum design method of CRP, compact helical gear device, contra-rotating shaft, contra-rotating seal and so forth are the technical topics for making practical use of CRP device for large cargo vessels. At present, there are four vessels on sail that use CRP and they are 37,000t cargo vessel and 258,000t oil tanker using CRP device of Ishikawajima-Harima Heavy Industries Co., Ltd., and vessel for carrying vehicles and 258,000t tanker using the CRP device of Mitsubishi Heavy Industries, Ltd. Main purpose of using CRP device in large cargo vessels is to save energy and reduction of maximum horse power of 15% was possible as compared with the one propeller vessel when compared with the same vessel speed. In this report, structure and characteristics of the CRP device for each company are explained and the practical findings of vessels on work are introduced. 10 figs.

  3. Ave sol contra excrementum : Kiri / Harri Tibar

    Index Scriptorium Estoniae

    Tibar, Harri

    1996-01-01

    Peeter Sauteri novell 'Kõhuvalu'. Vastukaja : Bogovski, Paul. Surun kätt, dotsent hr. Tibar! // Sõnumileht. - 1996. - 24. apr. - Lk.14; Väljataga, Märt. Viisipärasus contra inimlähedus // Sõnumileht. - 1996. - 26. apr. - Lk.14

  4. IgG4-Related Disease without Overexpression of IgG4: Pathogenesis Implications

    OpenAIRE

    Naoshi Nishina; Yuko Kaneko; Masataka Kuwana; Hironari Hanaoka; Hideto Kameda; Shuji Mikami; Tsutomu Takeuchi

    2012-01-01

    IgG4-related disease is a new disease group that affects multiple organs. It is characterized by high serum IgG4 and abundant infiltration of IgG4-bearing plasma cells in the affected organ. Here, we describe an intriguing case that suggested that IgG4-related disease might present without IgG4 overexpression or infiltration, at least during a relapse. A 47-year-old man had been diagnosed with systemic lupus erythematosus 15 years. He was admitted due to a pituitary mass, systemic lymphadenop...

  5. IgG4-related prostatitis progressed from localized IgG4-related lymphadenopathy

    OpenAIRE

    Li, Dujuan; Kan, Yunzhen; Fu, Fangfang; Wang, Shuhuan; Shi, Ligang; Liu, Jie; Kong, Lingfei

    2015-01-01

    Immunoglobulin G4-related disease (IgG4-RD) is a recently described inflammatory disease involving multiple organs. Prostate involvement with IgG4-RD is very rare. In this report, we describe a case of IgG4-related prostatitis progressed from localized IgG4-related lymphadenopathy. This patient was present with urine retention symptoms. MRI and CT examination revealed the prostatic enlargement and the multiple lymphadenopathy. Serum IgG4 levels were elevated. Prostatic tissue samples resected...

  6. IgG4-related spinal pachymeningitis.

    Science.gov (United States)

    Lu, Zhang; Tongxi, Liu; Jie, Luo; Yujuan, Jiao; Wei, Jiang; Xia, Liu; Yumin, Zheng; Xin, Lu

    2016-06-01

    The aim of this study is to study the clinical, laboratory, imaging pathology, and prognosis features of IgG4-related spinal pachymeningitis. We worked with a 55-year-old man suffering from IgG4-related spinal pachymeningitis who had the most widespread lesion in his dura mater. We also review previous related studies and discuss the clinical characteristics of this rare disease. In total, eight IgG4-related spinal pachymeningitis patients have been reported in the literature since 2009. They were mostly male patients, 51.7 ± 11.9 years old on average. Cervical and thoracic vertebrae were the most common sites for lesions. The most prominent symptom was varying numbness and weakness of the limbs and/or body associated with spinal cord compression. There was one patient (1/5) with elevated serum IgG4 levels and three patients (3/3) with increased cerebrospinal fluid (CSF) IgG4 index. Positive histopathologic findings are the strongest basis for a diagnosis. All the patients with IgG4-related spinal pachymeningitis responded well to glucocorticoid therapy. IgG4-related spinal pachymeningitis is an orphan disease that mainly occurs in cervical and thoracic vertebrae. Older males are the most susceptible group. Serum IgG4 levels were consistently normal in these cases, so analysis of CSF for IgG4 production (IgG4 index) could become a useful tool. Pathological findings remain the gold standard for diagnosis. Most patients responded favorably to glucocorticoid treatment. PMID:26567899

  7. Adverse effects of IgG therapy.

    Science.gov (United States)

    Berger, Melvin

    2013-01-01

    IgG is widely used for patients with immune deficiencies and in a broad range of autoimmune and inflammatory disorders. Up to 40% of intravenous infusions of IgG may be associated with adverse effects (AEs), which are mostly uncomfortable or unpleasant but often are not serious. The most common infusion-related AE is headache. More serious reactions, including true anaphylaxis and anaphylactoid reactions, occur less frequently. Most reactions are related to the rate of infusion and can be prevented or treated just by slowing the infusion rate. Medications such as nonsteroidal anti-inflammatory drugs, antihistamines, or corticosteroids also may be helpful in preventing or treating these common AEs. IgA deficiency with the potential of IgG or IgE antibodies against IgA increases the risk of some AEs but should not be viewed as a contraindication if IgG therapy is needed. Potentially serious AEs include renal dysfunction and/or failure, thromboembolic events, and acute hemolysis. These events usually are multifactorial, related to combinations of constituents in the IgG product as well as risk factors for the recipient. Awareness of these factors should allow minimization of the risks and consequences of these AEs. Subcutaneous IgG is absorbed more slowly into the circulation and has a lower incidence of AEs, but awareness and diligence are necessary whenever IgG is administered. PMID:24565701

  8. IgG4-related sclerosing disease

    Institute of Scientific and Technical Information of China (English)

    Terumi Kamisawa; Atsutake Okamoto

    2008-01-01

    Based on histological and immunohistochemical examination of various organs of patients with autoimmune pancreatitis (AIP), a novel clinicopathological entity of IgG4-related sclerosing disease has been proposed. This is a systemic disease that is characterized by extensive IgG4-positive plasma cells and T-lymphocyte infiltration of various organs. Clinical manifestations are apparent in the pancreas, bile duct, gallbladder, salivary gland, retroperitoneum, kidney, lung, and prostate, in which tissue fibrosis with obliterative phlebitis is pathologically induced. AIP is not simply pancreatitis but, in fact, is a pancreatic disease indicative of IgG4-related sclerosing diseases. This disease includes AIP, sclerosing cholangitis, cholecystitis, sialadenitis, retroperitoneal fibrosis, tubulointerstitial nephritis, interstitial pneumonia, prostatitis, inflammatory pseudotumor and lymphadenopathy, all IgG4-related. Most IgG4-related sclerosing diseases have been found to be associated with AIP, but also those without pancreatic involvement have been reported. In some cases, only one or two organs are clinically involved, while in others, three or four organs are affected. The disease occurs predominantly in older men and responds well to steroid therapy. Serum IgG4 levels and immunostaining with anti-IgG4 antibody are useful in making the diagnosis. Since malignant tumors are frequently suspected on initial presentation, IgG4-related sclerosing disease should be considered in the differential diagnosis to avoid unnecessary surgery.

  9. Pathologies Associated with Serum IgG4 Elevation

    OpenAIRE

    Mikael Ebbo; Aurélie Grados; Emmanuelle Bernit; Frederic Vély; José Boucraut; Jean-Robert Harlé; Laurent Daniel; Nicolas Schleinitz

    2012-01-01

    Statement of Purpose. IgG4-related disease (IgG4-RD) is usually associated to an increase of serum IgG4 levels. However other conditions have also been associated to high serum IgG4 levels. Methods. All IgG subclasses analyses performed in our hospital over a one-year period were analyzed. When IgG4 level were over 1.35 g/L, the patient’s clinical observation was analyzed and both final diagnosis and reason leading to IgG subclasses analysis were recorded. Only polyclonal increases of IgG4 we...

  10. Papel de los anticuerpos anti-ra33 como biomarcador diagnostico en pacientes colombianos con artritis reumatoide

    OpenAIRE

    Peña Altamar, Marvin Leonel

    2015-01-01

    Objetivos: Evaluar el rendimiento del biomarcador anti- RA33 para el diagnóstico de la artritis reumatoide (AR) mediante el estudio de su sensibilidad, especificidad, razón de verosimilitud positiva y negativa y compararlo con el factor reumatoide (FR) y los anticuerpos anticitrulinas (anti-CCP) en un grupo de pacientes y controles de la ciudad de Bogotá. Adicionalmente determinar si existe asociación entre las variables clínicas y serológicas medidas con el grado de afectación...

  11. Utilidad de las muestras de sangre total desecada en papel de filtro en la detección de anticuerpos antitoxoplasma

    Directory of Open Access Journals (Sweden)

    Joaquim Gascon

    1989-04-01

    Full Text Available Se compara la técnica de Aglutinación Directa (AD utilizando muestras de sangre total desecada en papel de filtro, con la técnica de ELISA y la misma AD utilizando muestras de suero de los mismos pacientes, para la detección de anticuerpos antitoxoplasma. Los resultados muestran la validez del método de la sangre desecada en papel de filtro para la detección de anticuerpos antitoxoplasma con la técnica de AD, y se considera su utilidad en los estudios epidemiológicos de campo.

  12. IgG4-related sclerosing disease

    OpenAIRE

    Kamisawa, Terumi; Okamoto, Atsutake

    2008-01-01

    Based on histological and immunohistochemical examination of various organs of patients with autoimmune pancreatitis (AIP), a novel clinicopathological entity of IgG4-related sclerosing disease has been proposed. This is a systemic disease that is characterized by extensive IgG4-positive plasma cells and T-lymphocyte infiltration of various organs. Clinical manifestations are apparent in the pancreas, bile duct, gallbladder, salivary gland, retroperitoneum, kidney, lung, and prostate, in whic...

  13. IgG4-related disease: why high IgG4 and fibrosis?

    OpenAIRE

    Koike, Takao

    2013-01-01

    The hallmarks of IgG4-related disease (IgG4-RD) are lymphoplasmacytic tissue infiltration with a predominance of IgG4-positive plasma cells, accompanied by fibrosis, obliterative phlebitis, dacryoadenitis, and elevated levels of IgG4. In a recent issue of Arthritis Research & Therapy, Tsuboi and colleagues demonstrated that regulatory T (Treg) cell-and T helper 2 (Th2) cell-derived cytokines contribute to the pathogenesis of Mikulicz's disease, an activation pathway that appears to be common ...

  14. Diagnosis of IgG4-related sclerosing cholangitis

    OpenAIRE

    2013-01-01

    IgG4-related sclerosing cholangitis (IgG4-SC) is often associated with autoimmune pancreatitis. However, the diffuse cholangiographic abnormalities observed in IgG4-SC may resemble those observed in primary sclerosing cholangitis (PSC), and the presence of segmental stenosis suggests cholangiocarcinoma (CC). IgG4-SC responds well to steroid therapy, whereas PSC is only effectively treated with liver transplantation and CC requires surgical intervention. Since IgG4-SC was first described, it h...

  15. Screening for IgG4-type anti-nuclear antibodies in IgG4-related disease

    OpenAIRE

    Kiyama, Kazuhiro; Yoshifuji, Hajime; Kandou, Tsugumitsu; Hosono, Yuji; Kitagori, Koji; Nakashima, Ran; Imura, Yoshitaka; Yukawa, Naoichiro; Ohmura, Koichiro; Fujii, Takao; Kawabata, Daisuke; Mimori, Tsuneyo

    2015-01-01

    Background Immunoglobulin (Ig) G4-related disease (IgG4-RD) is characterized by elevated serum IgG4 and infiltration of IgG4+ plasma cells into multiple organs. It is not known whether serum IgG4 is autoreactive in IgG4-RD. Methods We measured anti-nuclear antibody (ANA) in 19 IgG4-RD cases, determined IgG subclasses of the ANA, and compared them with those of other systemic autoimmune diseases (systemic lupus erythematosus, Sjögren’s syndrome, systemic sclerosis, and polymyositis), using sub...

  16. Analysis of IgG4 class switch-related molecules in IgG4-related disease

    OpenAIRE

    Tsuboi, Hiroto; Matsuo, Naomi; Iizuka, Mana; Tsuzuki, Sayaka; Kondo, Yuya; Tanaka, Akihiko; Moriyama, Masafumi; Matsumoto, Isao; Nakamura, Seiji; Sumida, Takayuki

    2012-01-01

    Introduction Immunoglobulin G4 (IgG4)-related disease (IgG4-RD) is a new disease entity characterized by high serum IgG4 levels, IgG4-positive plasmacytic infiltration, and fibrosis in various organs. The purpose of this study was to determine the mechanism of upregulation of IgG4 class switch recombination in IgG4-RD. Methods We extracted RNA from peripheral blood mononuclear cells (PBMCs) of patients with IgG4-RD (n = 6), Sjögren syndrome (SS) (n = 6), and healthy controls (n = 8), from CD3...

  17. Detection of Serum IgG4 Levels in Patients with IgG4-Related Disease and Other Disorders

    OpenAIRE

    Su, Yuying; Sun, Wei; Wang, Chenqiong; Wu, Xuefen; Miao, Ye; Xiong, Hui; Bai, Lin; Dong, Lingli

    2015-01-01

    Objective Elevated serum IgG4 levels are an important hallmark for diagnosing IgG4-related disease (IgG4-RD), but can also be observed in other diseases. This study aimed to compare two different testing methods for IgG4: ELISA and nephelometric assay. Both assays were used to measure serum IgG4 concentrations, and to assess the prevalence of high serum IgG4 levels in both IgG4-RD and non-IgG4-RD diseases. Methods A total of 80 serum samples were tested using the nephelometric assay and ELISA...

  18. A novel clinical entity, IgG4-related disease (IgG4RD): general concept and details

    OpenAIRE

    Umehara, Hisanori; Okazaki, Kazuichi; Masaki, Yasufumi; Kawano, Mitsuhiro; Yamamoto, Motohisa; Saeki, Takako; Matsui, Shoko; Sumida, Takayuki; Mimori, Tsuneyo; Tanaka, Yoshiya; Tsubota, Kazuo; Yoshino, Tadashi; Kawa, Shigeyuki; Suzuki, Ritsuro; Takegami, Tsutomu

    2011-01-01

    IgG4-related disease (IgG4RD) is a novel clinical disease entity characterized by elevated serum IgG4 concentration and tumefaction or tissue infiltration by IgG4-positive plasma cells. IgG4RD may be present in a certain proportion of patients with a wide variety of diseases, including Mikulicz’s disease, autoimmune pancreatitis, hypophysitis, Riedel thyroiditis, interstitial pneumonitis, interstitial nephritis, prostatitis, lymphadenopathy, retroperitoneal fibrosis, inflammatory aortic aneur...

  19. Histopathology of IgG4-Related Autoimmune Hepatitis and IgG4-Related Hepatopathy in IgG4-Related Disease.

    Science.gov (United States)

    Nakanuma, Yasuni; Ishizu, Yoji; Zen, Yoh; Harada, Kenichi; Umemura, Takeji

    2016-08-01

    Immunoglobulin G4-related disease (IgG4-RD) is a systemic disease involving many organs; it includes IgG4-related sclerosing cholangitis and inflammatory pseudotumor in the hepatobiliary system. Two types of hepatic parenchymal involvement have been reported in IgG4-RD: IgG4-related autoimmune hepatitis (AIH) and IgG4-hepatopathy. Moreover, only three cases of IgG4-related AIH have been reported. Immunoglobulin G4-related AIH is clinicopathologically similar to AIH, except for an elevated serum IgG4 level and heavy infiltration of IgG4-positive plasma cells in the liver tissue. Interestingly, IgG4-related AIH can be complicated by well-known IgG4-RD(s). Immunoglobulin G4-hepatopathy, which includes various histopathological lesions encountered in the liver of patients with type I autoimmune pancreatitis, is classified into five histological categories: portal inflammation, large bile duct damage, portal sclerosis, lobular hepatitis, and cholestasis. Immunoglobulin G4-hepatopathy is currently a collective term covering hepatic lesions primarily or secondarily related to IgG4-related sclerosing cholangitis and type 1 autoimmune pancreatitis. In conclusion, the liver is not immune to IgG4-RD, and at least two types of hepatic involvement in IgG4-RD have been reported: IgG4-related AIH and IgG4-hepatopathy. Additional studies are required to clarify their precise clinical significance with respect to IgG4-RD and inherent liver diseases. PMID:27466793

  20. IgG Subclass Staining in Routine Renal Biopsy Material.

    Science.gov (United States)

    Hemminger, Jessica; Nadasdy, Gyongyi; Satoskar, Anjali; Brodsky, Sergey V; Nadasdy, Tibor

    2016-05-01

    Immunofluorescence staining plays a vital role in nephropathology, but the panel of antibodies used has not changed for decades. Further classification of immunoglobulin (Ig)G-containing immune-type deposits with IgG subclass staining (IgG1, IgG2, IgG3, and IgG4) has been shown to be of diagnostic utility in glomerular diseases, but their value in the evaluation of renal biopsies has not been addressed systematically in large renal biopsy material. Between January 2007 and June 2014, using direct immunofluorescence, we stained every renal biopsy for the IgG subclasses if there was moderate to prominent glomerular IgG staining and/or IgG-predominant or IgG-codominant glomerular staining. The total number of biopsies stained was 1084, which included 367 cases of membranous glomerulonephritis, 307 cases of lupus nephritis, 74 cases of fibrillary glomerulonephritis, 53 cases of proliferative glomerulonephritis with monoclonal IgG deposits, and 25 cases of antiglomerular basement membrane disease, among others. We found that monoclonality of IgG deposits cannot always be reliably determined on the basis of kappa and lambda light chain staining alone, particularly if concomitant (frequently nonspecific) IgM staining is present. In IgG heavy and heavy and light chain deposition disease (3 cases), subclass staining is very helpful, and in proliferative glomerulonephritis with monoclonal IgG deposits subclass staining is necessary. IgG subclass staining is useful in differentiating primary from secondary membranous glomerulonephritis. In proliferative glomerulonephritis with polyclonal IgG deposition, IgG1 dominance/codominance with concomitant IgG3 and IgG2 but weak or absent IgG4 staining favors an underlying autoimmune disease. IgG subclass staining is a very useful diagnostic method in a selected cohort of renal biopsies, particularly in biopsies with glomerulonephritis with monoclonal IgG deposits. PMID:26848798

  1. Purificación de IgG1, IgG2 e IgG3 mediante cromatografía de afinidad a partir de intacglobín Purification of IgG1, IgG2 and IgG3 by affinity chromatography starting from Intacglobin

    OpenAIRE

    Ada A Arce Hernández; Julio C. Merlín Linares; Rinaldo Villaescusa Blanco; Manuel Padilla López; Yamilka González de Armas; Ana M Guerreiro Hernández

    2001-01-01

    Se describe un método de purificación de las subclases IgG1, IgG2 e IgG3 a partir de Intacglobin mediante cromatografía de afinidad con el empleo de proteína A Sepharose y la aplicación de un gradiente lineal de pH. Se detectó la presencia de IgG1, IgG2 e IgG3 en las fracciones eluidas mediante doble inmunodifusión e inmunoelectroforesis, utilizando sueros comerciales anti IgG, anti IgG1, anti IgG2 y anti IgG3. El procedimiento desarrollado se caracterizó por su sencillez, elevada resolución ...

  2. DETECCIÓN DE ANTICUERPOS ANTI-Leishmania (Trypanosomatidae EN POBLACIONES CANINAS DEL DEPARTAMENTO DE SUCRE, COLOMBIA

    Directory of Open Access Journals (Sweden)

    Luís Enrique Paternina Tuirán

    2015-11-01

    Full Text Available RESUMENEl objetivo de la investigación fue determinar la prevalencia de anticuerpos anti-Leishmania en perros del departamento de Sucre, Colombia. Se analizaron 122 perros del área rural de los municipios de Ovejas, Sampués y Sincelejo, mediante la técnica de inmunofluorescencia indirecta (IFI. Anticuerpos anti-Leishmania fueron detectados en el 69,6 % (IC95 % = 61,1 – 78,2 de la población canina estudiada. En el municipio de Sincelejo la seropositividad fue del 72 % (IC95 % = 61,1 – 82,8, en el municipio de Sampués del 68,4 % (IC95 % = 52,3 – 84,5 y en el municipio de Ovejas del 55,5 % (IC95 % = 21,2 – 86,3. Los animales seropositivos fueron principalmente caninos jóvenes y adultos. El 17,6 % de los perros seropositivos mostró signos clínicos compatibles con leishmaniasis canina, entre los cuales la onicogrifosis, alopecia y caquexia fueron los más comunes. La alta frecuencia de caninos con anticuerpos a Leishmania detectada en el presente estudio, pone de manifiesto la hiperendemicidad de la leishmaniasis canina en esta zona del país, así como el alto riesgo de brotes epidémicos de la enfermedad.ABSTRACTThe aim of this survey was to determine prevalence of antibodies against Leishmania in dogs from Sucre, Colombia. We analyzed 122 dogs in rural areas from municipalities of Sampués, Ovejas and Sincelejo, by indirect immunofluorescence (IFA. Anti-Leishmania antibodies were detected in 69.6 % (95 % CI = 61.1 to 78.2 of the selected canine population. In the municipality of Sincelejo, Sampues and Ovejas, the seropositivities were 72 % (95 % CI = 61.1 to 82.8, 68.4 % (95 % CI = 52.3 to 84.5 and 55.5 % (95 % CI = 21.2 to 86.3 respectively. Seropositive animals were mainly young and adult dogs. The 17.6 % of seropositive dogs showed clinical signs compatible with canine leishmaniasis; onychogryphosis, alopecia and cachexia were the most common ones. The detected high frequency of canines with antibodies against Leishmania in the

  3. Purificación de IgG1, IgG2 e IgG3 mediante cromatografía de afinidad a partir de intacglobín Purification of IgG1, IgG2 and IgG3 by affinity chromatography starting from Intacglobin

    Directory of Open Access Journals (Sweden)

    Ada A Arce Hernández

    2001-08-01

    Full Text Available Se describe un método de purificación de las subclases IgG1, IgG2 e IgG3 a partir de Intacglobin mediante cromatografía de afinidad con el empleo de proteína A Sepharose y la aplicación de un gradiente lineal de pH. Se detectó la presencia de IgG1, IgG2 e IgG3 en las fracciones eluidas mediante doble inmunodifusión e inmunoelectroforesis, utilizando sueros comerciales anti IgG, anti IgG1, anti IgG2 y anti IgG3. El procedimiento desarrollado se caracterizó por su sencillez, elevada resolución y la relativa pureza de las subclases aisladas. Se logró un rendimiento total del 53,7 %, lo que indica la eficiencia del métodoA method for the purification of IgG1, IgG2, and IgG3 subclasses starting from Intacglobin by affinity chromatography with the use of protein A Sepharose and the application of a lineal gradient of pH is described. IgG1, IgG2 and IgG3 were detected in the eluted fractions by doble immunodifussion and immunoelectrophoresis by using anti IgG, anti IgG1, anti IgG2 and anti IgG3 commercial sera. The procedure developed was characterized by its simplicity, high resolution and the relative purity of the isolated subclasses. A total yield of 53.7 % was attained, which demonstrates the efficiency of this method

  4. IgG4-related kidney disease – an update

    OpenAIRE

    Kawano, Mitsuhiro; Saeki, Takako

    2015-01-01

    Purpose of review IgG4-related disease (IgG4-RD) is a recently recognized systemic inflammatory disorder that can affect most organs/tissues such as sarcoidosis. The kidney is a frequently affected organ with tubulointerstitial nephritis (TIN), the representative lesion of IgG4-RD. This review focuses on the latest knowledge of IgG4-related kidney disease (IgG4-RKD). Recent findings A wide range of renal manifestations of IgG4-RD, that is TIN, membranous glomerulonephritis (MGN) and other glo...

  5. Otologic Manifestation in IgG4-Related Systemic Disease

    OpenAIRE

    Cho, Han-Kyu; Lee, Yun Jong; Chung, Jin-Haeng; Koo, Ja-Won

    2011-01-01

    IgG4-related systemic disease, including autoimmune pancreatitis, is a multi-organ disorder characterized by elevated serum immunoglobulin G4 (IgG4) concentration and IgG4-positive plasma cell infiltration. We report a case of a 66-year-old woman with IgG4-related hearing disorder, presenting with fluctuating mixed hearing loss with middle ear effusion. The serum IgG4 level was elevated and pathological examination revealed dense infiltration of IgG4-positive lymphocyte in the renal parenchym...

  6. Vasculitis asociadas a anticuerpos anti-citoplasma de neutrófilos: Clínica y tratamiento

    OpenAIRE

    2013-01-01

    Las vasculitis asociadas a anticuerpos anti-citoplasma de neutrófilos (ANCA) comprenden a un grupo de enfermedades caracterizadas por la inflamación de la pared de pequeños vasos. Analizamos las características epidemiológicas y clínicas en una serie de 47 pacientes: 23 (49%) granulomatosis de Wegener (GW), 15 (32%) poliangeítis microscópica (PAM) y nueve (19%) vasculitis limitada al riñón (VLR). La edad media al inicio de los síntomas fue de 50.7 ± 14.9 años. La manifestación clínica más fre...

  7. Prevalencia de anticuerpos anti-Leptospira spp. en personas con exposición laboral en el departamento del Tolima / Prevalence of anti-Leptospira spp. antibodies among people with occupational exposure in Tolima Department

    Directory of Open Access Journals (Sweden)

    Blanca L. Guzmán-Barragán

    2016-05-01

    Full Text Available Resumen Objetivo: estimar la prevalencia de anticuerpos IgM contra Leptospira spp., mediante el Ensayo de Inmunoabsorción Ligado a Enzimas (elisa, en la población de riesgo laboral de 8 municipios del Tolima. Metodología: se obtuvieron muestras de sangre de 261 empleados, las cuales fueron analizadas mediante la técnica de elisa para la detección de anticuerpos IgM anti-Leptospira spp., seguido de mat y serotipificación. Resultado: se estimó una seroprevalencia del 25,29%, con una seroreactividad mayor en trabajadores de plantas de beneficio animal (34,2%, recolección de residuos sólidos (27,1% y trabajadores de acueducto y alcantarillado (14,8%. La actividad en plantas de beneficio animal se identificó como factor de riesgo de Leptospira spp. (OR=1,86. Los serovares identificados fueron L. Bratislava (16, Ballum (5, Tarassovi (3, Hebdomadis (2, Sejroe (2 y Icterhemorragiae (1. El municipio de Libano presento el mayor porcentaje de positividad (36,96%, seguido de Espinal y Guamo con 28,57% cada uno. Discusión: la evaluación del sistema de vigilancia indicó deficiencia en recursos y debilidades de los profesionales de la salud al desconocer los procedimientos, investigación, diagnóstico y notificación de la enfermedad. Conclusiones: la leptospirosis está presente en poblaciones de riesgo laboral en el Tolima y se hace necesario abordar esta problemática en la población de otros municipios y los animales transmisores de la enfermedad. / Abstract Objective: to estimate the prevalence of IgM antibodies against Leptospira spp. Using the enzyme-linked immunosorbent assay (elisa in a population at occupational risk from 8 municipalities of the Tolima department, Colombia. Methodology: blood samples were collected from 261 employees and analyzed with the elisa technique to detect IgM and anti-Leptospira spp. antibodies. This was followed by mat and serotyping. Results: a seroprevalence of 25.29% was estimated, with higher

  8. Inmunogenicidad y tolerancia de una vacuna contra influenza, en una población mexicana mayor de 55 años de edad Immunogenicity and safety of the influenza vaccine, in a population older than 55-years in Mexico

    Directory of Open Access Journals (Sweden)

    Octavio Ayala-Montiel

    2005-04-01

    Full Text Available OBJETIVO: Verificar la inmunogenicidad y tolerancia de una vacuna purificada, inactivada y fraccionada contra influenza, en adultos mexicanos derechohabientes de Petróleos Mexicanos (Pemex. MATERIAL Y MÉTODOS: Se incluyeron 90 adultos mayores de 55 años de edad, derechohabientes de los servicios médicos del Hospital Central Sur Pemex, durante los meses de noviembre y diciembre de 2000. Los criterios evaluados en relación con la inmunogenicidad incluyeron el porcentaje de sujetos protegidos, cuantificados por medio de anticuerpos antihemaglutininas superior o igual a 1:40, así como por el porcentaje de seroconversión determinado por el título inicial de anticuerpos multiplicado por un factor 4X. Los criterios secundarios fueron la frecuencia de reacciones adversas tanto locales como sistémicas. Se realizaron estudios de afinidad antígeno-anticuerpo para determinar la respuesta policlonal de anticuerpos y de anticuerpos de alta afinidad prevacunación y posvacunación. Se calcularon frecuencias y porcentajes. RESULTADOS: Se identificó una seroprotección en 95.6% de los sujetos a la cepa H1N1, de 98.9% a la cepa H3N2 y de 100% a la cepa B/ Yamanashi. En cuanto a los porcentajes de seroconversión, se identificó un incremento 4X de 74.4 para la cepa H1N1, de 88.9 para la cepa H3N2, y de 82.2 para la cepa B / Yamanashi. Un total de 18 individuos (20% presentaron reacciones locales, mientras que 17 (18.8% presentaron reacciones sistémicas a los cinco días posvacunación y nueve sujetos (10% a los 28 días. Las reacciones locales a los cinco días consistieron en dolor, en 10 individuos (11.1%; enrojecimiento, en ocho (8.8%, e induración, en seis (6.6%. Malestar general, cefalea y fiebre se presentaron a los cinco días en 10, 8.8, y 0% de individuos, respectivamente, y en 4.4, 6.6, y 0%, respectivamente, a los 28 días. CONCLUSIONES: Esta vacuna contra influenza demostró ser altamente inmunogénica en adultos mexicanos mayores de 55 a

  9. Factores asociados a una respuesta inadecuada a la vacunación contra la hepatitis B en personal sanitario

    Directory of Open Access Journals (Sweden)

    Tolosa Martínez Natividad

    1998-01-01

    Full Text Available FUNDAMENTO: La vacuna recombinante contra la hepatitis B confiere inmunidad aproximadamente en el 95 % de los casos, pero existe un porcentaje que responde insuficientemente. El objetivo de este trabajo es evaluar los factores que se asocian con una inadecuada respuesta inmunitaria. MÉTODOS: Se trata de un estudio observacional y analítico en el que se sigue retrospectivamente una cohorte de sujetos vacunados frente al virus de la hepatitis B (VHB. Se recogieron las variables de interés del personal sanitario que cumplía los criterios de inclusión, del Área de Salud 9 de la Comunidad Valenciana (n=827. Tras la vacunación se determinó la titulación de anticuerpos de superficie (antiHBs para comprobar la respuesta, considerándose niveles protectores los superiores a 10 mUI/ml. RESULTADOS: Se produjo una adecuada seroconversión en el 94,4% de los vacunados. La baja o nula respuesta a la vacuna se asoció significativamente y de forma independiente con variables como el sexo masculino, la edad, el índice de masa corporal (IMC y el tabaquismo. El consumo de alcohol y los niveles de GPT, aunque no se relacionaron de forma significativa con la respuesta a la vacuna, actuaron como posibles factores de confusión. CONCLUSIONES: La inmunogenicidad de la vacuna es satisfactoria. Es importante cuantificar los niveles de antiHBs, sobretodo cuando hay factores predictivos de mala respuesta. De esta manera, es posible identificar a aquellos que precisan dosis de recuerdo y a los no respondedores, evitándose así situaciones de falsa sensación de protección frente al VHB.

  10. Development of an IgG4-RD Responder Index

    OpenAIRE

    Arezou Khosroshahi; Carruthers, Mollie N.; Vikram Deshpande; John H. Stone

    2012-01-01

    IgG4-related disease (IgG4-RD) is a multiorgan inflammatory disease in which diverse organ manifestations are linked by common histopathological and immunohistochemical features. Prospective studies of IgG4-RD patients are required to clarify the natural history, long-term prognosis, and treatment approaches in this recently recognized condition. Patients with IgG4-RD have different organ manifestations and are followed by multiple specialties. Divergent approaches to the assessment of patien...

  11. IgG4-related Disease of the Genitourinary Tract

    OpenAIRE

    Divatia, Mukul K; Ro, Jae Y.

    2014-01-01

    IgG4-related disease (IgG4-RD) is a recently established albeit well recognized fibro-inflammatory condition with distinctive features including a characteristic histopathological appearance; a propensity to develop tumefactive lesions in multiple body sites; and oft elevated serum IgG4 levels. The consensus statement on IgG-4 RD equips practicing pathologists with a set of working guidelines for the diagnosis of pathologic lesions identified in a host of different organ system affected with ...

  12. Glycosylation of plasma IgG in colorectal cancer prognosis

    OpenAIRE

    Evropi Theodoratou; Kujtim Thaçi; Felix Agakov; Timofeeva, Maria N.; Jerko Štambuk; Maja Pučić-Baković; Frano Vučković; Peter Orchard; Anna Agakova; DIN, FARHAT V. N.; Ewan Brown; Rudd, Pauline M; Susan M. Farrington; Dunlop, Malcolm G; Harry Campbell

    2016-01-01

    In this study we demonstrate the potential value of Immunoglobulin G (IgG) glycosylation as a novel prognostic biomarker of colorectal cancer (CRC). We analysed plasma IgG glycans in 1229 CRC patients and correlated with survival outcomes. We assessed the predictive value of clinical algorithms and compared this to algorithms that also included glycan predictors. Decreased galactosylation, decreased sialylation (of fucosylated IgG glycan structures) and increased bisecting GlcNAc in IgG glyca...

  13. IgG4-related Disease of the Genitourinary Tract

    Directory of Open Access Journals (Sweden)

    Mukul K. Divatia

    2014-02-01

    Full Text Available IgG4-related disease (IgG4-RD is a recently established albeit well recognized fibro-inflammatory condition with distinctive features including a characteristic histopathological appearance; a propensity to develop tumefactive lesions in multiple body sites; and oft elevated serum IgG4 levels. The consensus statement on IgG-4 RD equips practicing pathologists with a set of working guidelines for the diagnosis of pathologic lesions identified in a host of different organ system affected with this disease. The diagnosis of IgG4-RD requires the combined presence of the characteristic histopathological appearance and increased numbers of IgG4-positive plasma cells. The essential histopathological features include a dense lymphoplasmacytic infiltrate, a storiform pattern of fibrosis, and obliterative phlebitis. Tissue IgG4-positive plasma cell counts and IgG4: IgG ratios are significant ancillary aids in establishing the diagnosis. The spectrum of IgG4-RD continues to expand and involve multiple body sites. The genitourinary system comprising of the kidneys, ureters, urinary bladder, urethra, prostate gland, testes and penis is one of the multiple organ systems to be affected by IgG4-RD. This review describes the clinical and histopathologic patterns of involvement of the genitourinary system by IgG4-RD, in association with serologic and radiological features. [J Interdiscipl Histopathol 2014; 2(1.000: 3-18

  14. Diagnostic Performance of Serum IgG4 Levels in Patients With IgG4-Related Disease

    OpenAIRE

    Yu, Kuang-Hui; Chan, Tien-Ming; Tsai, Ping-Han; Chen, Ching-Hui; Chang, Pi-Yueh

    2015-01-01

    Abstract The aim of this study is to study the clinical features and diagnostic performance of IgG4 in Chinese populations with IgG4-related diseases (IgG4-RDs). The medical records of 2901 adult subjects who underwent serum IgG4 level tests conducted between December 2007 and May 2014 were reviewed. Serum concentrations of IgG4 were measured in 2901 cases, including 161 (5.6%) patients with IgG4-RD and 2740 (94.4%) patients without IgG4-RD (non-IgG4-RD group). The mean age of the IgG4-RD pat...

  15. IgG4-related sialadenitis: IgG4 is helpful, but biopsies are still crucial

    OpenAIRE

    Witte, Torsten; Schulze-Koops, Hendrik

    2015-01-01

    IgG4-related disease is rare, but a frequent differential diagnosis for malignant and for autoimmune diseases. Li and colleagues report the largest cohort of patients with IgG4-related sialadenitis. The observations reveal that the most important diagnostic step is obtaining biopsies. In addition, the IgG4 serum concentration may be a biomarker for the disease progression.

  16. Diagnostic performance of serum IgG4 level for IgG4-related disease: a meta-analysis.

    Science.gov (United States)

    Xu, Wen-Long; Ling, Ying-Chun; Wang, Zhi-Kai; Deng, Fang

    2016-01-01

    An elevated serum IgG4 level is one of the most useful factors in the diagnosis of IgG4-related disease (IgG4-RD). In this study, we performed a meta-analysis of the published articles assessing the diagnostic accuracy of serum IgG4 concentrations for IgG4-RD. The databases of MEDLINE/PubMed, EMBASE and Web of Science were systematically searched for relevant studies. Sensitivities and specificities of serum IgG4 in each study were calculated, and the hierarchical summary receiver operating characteristic (HSROC) model with a random effects model were employed to obtain the individual and pooled estimates of sensitivities and specificities. In total, twenty-three studies comprising 6048 patients with IgG4-RD were included in the meta-analysis. The pooled sensitivity was 85% with a 95% confidence interval (CI) of 78-90%; the pooled specificity was 93% with a 95% CI of 90-95%. The HSROC curve for quantitative serum IgG4 lies closer to the upper left corner of the plot, and the area under the curve (AUC) was 0.95 (95% CI 0.93, 0.97), which suggested a high diagnostic accuracy of serum IgG4 for the entity of IgG4-RD. Our study suggests that serum IgG4 has high sensitivity and specificity in the diagnosis of IgG4-RD. PMID:27558881

  17. Cholangiocarcinoma with respect to IgG4 Reaction

    OpenAIRE

    Kenichi Harada; Yasuni Nakanuma

    2014-01-01

    IgG4 reactions marked by infiltration of IgG4-positive plasma cells in affected organs occur in cancer patients and in patients with IgG4-related diseases. Extrahepatic cholangiocarcinomas including gall bladder cancer are often accompanied by significant IgG4 reactions; these reactions show a negative correlation with CD8-positive cytotoxic T cells, suggesting that the evasion of immune surveillance is associated with cytotoxic T cells. The regulatory cytokine IL-10 may induce IgG4-positive ...

  18. Isolated intrapancreatic IgG4-related sclerosing cholangitis

    OpenAIRE

    Nakazawa, Takahiro; Ikeda, Yushi; Kawaguchi, Yoshiaki; KITAGAWA, HIROHISA; Takada, Hiroki; Takeda, Yutaka; Makino, Isamu; Makino, Naohiko; Naitoh, Itaru; Tanaka, Atsushi

    2015-01-01

    Immunoglobulin G4-related sclerosing cholangitis (IgG4-SC) is frequently associated with type 1 autoimmune pancreatitis (AIP). Association with AIP can be utilized in the diagnosis of IgG4-SC. However, some cases of IgG4-SC are isolated from AIP, which complicates the diagnosis. Most of the reported cases of isolated IgG4-SC displayed hilar biliary strictures, whereas isolated IgG4-SC with intrapancreatic biliary stricture is very rare. Recently, we have encountered 5 isolated intrapancreatic...

  19. IgG4-Associated Cholangitis Can Mimic Hilar Cholangiocarcinoma

    OpenAIRE

    Zaydfudim, Victor M.; Andrew Y Wang; de Lange, Eduard E.; Zhao, Zimin; Moskaluk, Christopher A.; Bauer, Todd W.; Adams, Reid B

    2015-01-01

    IgG4-associated cholangitis can mimic hilar cholangiocarcinoma. Previously reported patients with IgG4-associated cholangitis mimicking cholangiocarcinoma had elevated serum IgG4 levels and long-segment biliary strictures. However, in the absence of other diagnostic criteria for malignancy, IgG4-associated cholangitis should remain a consideration among patients with normal serum IgG4 and a hilar mass suspicious for cholangiocarcinoma. The presence of a hilar mass and a malignant-appearing bi...

  20. IgG4-Related Disease: A Multispecialty Condition

    OpenAIRE

    2014-01-01

    IgG4-related disease (IgG4-RD) is a recently recognized group of conditions, characterized by tumor-like swelling of involved organs, lymphoplasmacytic infiltrate rich in IgG4-positive plasma cells, variable degrees of fibrosis, and elevated serum IgG4 concentrations. Currently IgG4-RD is recognized as a systemic condition that can affect several organs and tissues. Herein we report the case of a 34-year-old male patient who was admitted to our hospital with diffuse abdominal pain, weight los...

  1. Anticuerpos frente a virus West nile y otros virus transmitidos por artropodos en la poblacion del Delta del Ebro

    Directory of Open Access Journals (Sweden)

    Lozano Alvaro

    1998-01-01

    Full Text Available FUNDAMENTOS: El virus West Nile (VWN es un Flavivirus que se transmite al hombre a través de distintas especies de mosquitos y produce brotes y casos esporádicos de enfermedad en distintas regiones del Viejo Mundo, incluída la Cuenca Mediterránea. Las zonas húmedas europeas que acogen aves migratorias procedentes de África constituyen áreas de alto riesgo para esta infección, así como para otras infecciones víricas transmitidas por artrópodos. MÉTODOS: Con objeto de investigar la prevalencia de la infección por el VWN y otros virus de transmisión similar en la población humana del Delta del Ebro, se estudiaron 1037 muestras de suero, obtenidas en 10 localidades de la zona, para presencia de anticuerpos frente a VWN y otros 12 virus transmitidos por artrópodos (3 Alfavirus, 8 Flaviviridae y 1 Bunyaviridae mediante titulación por inhibición de la hemaglutinación (IHA. En algunos casos se estudió la presencia de IgM específica por IHA tras fraccionar el suero por centrifugación en gradientes de sacarosa. RESULTADOS: En total, se encontró reactividad significativa frente a alguno de los virus probados en 130 casos (12.5%; 4.1% frente a Alfavirus, 8.0% frente a Flaviviridae y 0.4% frente a Bunyaviridae. El análisis de los títulos de anticuerpos reveló porcentajes significativos de muestras con títulos elevados frente a antígenos de VWN y otros. La distribución de la seroprevalencia fue muy desigual, concentrándose fundamentalmente en 3 localidades del interior del Delta (Ampolla, San Jaime y Montells, donde la prevalencia de anticuerpos frente a Flaviviridae llegó a alcanzar el 30% y se observaron niveles residuales de IgM frente a VWN en algunos sueros. CONCLUSIONES: Estos resultados y los obtenidos previamente en otras regiones de la Península Ibérica sugieren que el VWN circula en la población humana de las zonas de riesgo y produce brotes epidémicos periódicos. Habida cuenta del alto porcentaje de

  2. Anticuerpo anticitrulina y manifestaciones extra articulares en artritis reumatoidea Anticitrulin antibody and the extra-articular manifestations in rheumatoid arthritis

    Directory of Open Access Journals (Sweden)

    María Jezabel Haye Salinas

    2013-02-01

    Full Text Available Los pacientes con artritis reumatidea (AR pueden desarrollar manifestaciones extra articulares (MExA, relacionadas a su morbi-mortalidad. Los anticuerpos anti-péptidos citrulinados cíclicos (ACCP son específicos para la AR y estan relacionados con el daño articular; y podrían tener rol patogénico en las MExA. Nuestro objetivo fue determinar la relación entre los anticuerpos ACCP y MExA en pacientes con AR. Se incluyeron 74 pacientes con diagnóstico de AR (ACR 1987 mayores de 18 años, de más de 6 meses de evolución, con MExA, y un control apareado por sexo y edad sin MExA por cada paciente. Las variables demográficas, clínicas y de laboratorio se compararon con test t, chi cuadrado o Mann-Whitney. Se realizó análisis multivariado; p ≤ 0.05. Los pacientes con MExA presentaron mayor título de anticuerpo ACCP (116 vs. 34, p A large proportion of rheumatoid arthritis (RA patients develop extra-articular manifestations (EAM, which are associated with morbidity and early mortality. Anti cyclic citrullinated peptide (ACCP antibody has proven to be highly specific for the diagnosis of RA, associated with severe joint damage and may have some role in the pathogenesis of EAM. The aim of this study was to determine the relationship between ACCP antibody and the presence of EAM in RA patients. Seventy four RA patients (ACR 1987 with EAM, > 18 years, more than 6 months duration were included, and an EAM free control, matched by sex and age, for each patient. Demographic, clinical and laboratory variables were compared using t-test, chi-square or Mann-Whitney test. Multivariate analysis was performed: p ≤ 0.05. Patients with EAM presented a greater value of ACCP antibody (116 vs. 34, p < 0.01 and rheumatoid factor (108 vs. 34.5, p < 0.01. Independent association with current smoking habit (p = 0.02, OR = 3.78, 95%: 1.17-12.2, RF positive (p = 0.04, OR 3.23, CI 95%: 1.04 to 11.8 and ACCP antibody positive (p = 0.04, OR 3.23, 95% CI: 1

  3. On Estonian Folk Culture: Pro et contra

    Directory of Open Access Journals (Sweden)

    Piret Õunapuu

    2014-08-01

    Full Text Available The year 2013 was designated the year of heritage in Estonia, with any kind of intangible and tangible heritage enjoying pride of place. Heritage was written and spoken about and revived in all kinds of ways and manners. The motto of the year was: There is no heritage without heir. Cultural heritage is a comprehensive concept. This article focuses, above all, on indigenous cultural heritage and, more precisely, its tangible (so-called object part. Was the Estonian peasant, 120 years back, with his gradually increasing self-confidence, proud or ashamed of his archaic household items? Rustic folk culture was highly viable at that time. In many places people still wore folk costumes – if not daily, then at least the older generation used to wear them to church. A great part of Estonians still lived as if in a museum. Actually, this reminded of the old times that people tried to put behind them, and sons were sent to school in town for a better and more civilised future. In the context of this article, the most important agency is peasants’ attitude towards tangible heritage – folk culture in the widest sense of the word. The appendix, Pro et contra, at the end of the article exemplifies this on the basis of different sources.

  4. Colostrogenesis: IgG1 transcytosis mechanisms.

    Science.gov (United States)

    Baumrucker, Craig R; Bruckmaier, Rupert M

    2014-03-01

    Biological transport of intact proteins across epithelial cells has been documented for many absorptive and secretory tissues. Immunoglobulins were some of the earliest studied proteins in this category. The transcellular transport (transcytosis) of immunoglobulins in neonatal health and development has been recognized; the process is especially significant with ungulates because they do not transcytose immunoglobulins across the placenta to the neonate. Rather, they depend upon mammary secretion of colostrum and intestinal absorption of immunoglobulins in order to provide intestinal and systemic defense until the young ungulate develops its own humoral defense mechanisms. The neonatal dairy calf's ability to absorb immunoglobulins from colostrum is assisted by a ~24 h "open gut" phenomenon where large proteins pass the intestinal epithelial cells and enter the systemic system. However, a critical problem recognized for newborn dairy calves is that an optimum mass of colostrum Immunoglobulin G (IgG) needs to be absorbed within that 24 h window in order to provide maximal resistance to disease. Many calves do not achieve the optimum because of poor quality colostrum. While many studies have focused on calf absorption, the principal cause of the problem resides with the extreme variation (g to kg) in the mammary gland's capacity to transfer blood IgG1 into colostrum. Colostrum is a unique mammary secretory product that is formed during late pregnancy when mammary cells are proliferating and differentiating in preparation for lactation. In addition to the transcytosis of immunoglobulins, the mammary gland also concentrates a number of circulating hormones into colostrum. Remarkably, the mechanisms in the formation of colostrum in ungulates have been rather modestly studied. The mechanisms and causes of this variation in mammary gland transcytosis of IgG1 are examined, evaluated, and in some cases, explained. PMID:24474529

  5. Prevalencia de anticuerpos para Trypanosoma cruzi en caninos de dos municipios endémicos de Boyacá

    Directory of Open Access Journals (Sweden)

    Diego Manrique Abril

    2012-04-01

    Full Text Available Objetivo. evaluar la prevalencia de anticuerpos anti Trypanosoma cruzi (T. cruzi en una muestra de caninos domésticos residentes en dos municipios endémicos. Materiales y métodos. Se tomaron muestras séricas de 20 caninos procedentes de hogares donde residen mujeres gestantes seropositivas y 40 perros habitantes de hogares de mujeres gestantes seronegativas en Miraflores y Moniquira, Boyacá. El análisis se realizó mediante prueba diagnóstica rápida dipstick de InBios. Resultados. Se encontró prevalencia del 16.7% en Moniquirá y del 13.3% Miraflores respectivamente con una prevalencia general del 15% en los dos municipios. Se halló riesgo 3 veces mayor de que ocurra la infección en caninos, en los hogares donde residen gestantes seropositivas; además la infestación por pulgas y garrapatas en el animal, hábitat cercano a la vivienda, se relacionan con mayor seropositividad en el canino. Conclusiones. La raza, el sexo, la presencia de aves en la casa y al examen clínico general son considerados factores pronósticos en en la infección por Trypanosoma cruzi en caninos. Como factores protectores se identificó la desparasitación y vacunación de los animales.

  6. BUSCANDO UM BIOHERBICIDA CONTRA Cyperus sp (tiririca

    Directory of Open Access Journals (Sweden)

    Cristine Benfatti Gonzalez

    2001-01-01

    Full Text Available As an alternative to conventional control of Cyperus sp (herbaceousnutsedge, with chemical products, it rises the biological control, making use of phytopathogenic microorganisms. As results of the whole production of Cercospora henningsii e Cercospora caricis by fermentation in potato-dextrose (PD liquid medium, it was observed that both species obtained the optimum growth at 36o C. C. henningsii attained the best value after a period of 72 h of fermentation and C. caricis attained it after 60 h. The field experiments, against Cyperus sp (nutsedge, with the obtained products by liquid fermentation of Cercospora sp (C. henningsii and/or C. caribaea, andwith the use of "wet chamber", proved the pathogenic potential bioherbicide of these microorganisms. = Como alternativa ao controle convencional do Cyperus sp (tiririca usando produtos químicos, surge o controle biológico, empregando-se microrganismos fitopatógenos. Como resultados da produção massal de Cercospora henningsii eCercospora caricis através de cultivo submerso em meio de cultura batata-dextrose (BD, observou-se que ambas espécies obtiveram um crescimento ótimo a 36o C, sendo que para C. henningsii se deu com 72 h de fermentação e para C. caricis com 60 h. Os experimentos de campo, bem como os de Câmara úmida, contra Cyperus sp (tiririca,com os produtos obtidos pelo cultivo submerso de Cercospora sp (C. henningsii e/ou C. caribaea, demonstraram a patogenicidade, ou seja, o potencial bioherbicida desses microrganismos.

  7. Evolution of IgG antibody response against Toxoplasma gondii tissue cyst in acute and chronic human infections

    Directory of Open Access Journals (Sweden)

    Margarita VILLAVEDRA

    1998-03-01

    Full Text Available The recognition profile of the tissue cysts antigens by IgG antibodies was studied during acute and chronic human toxoplasmic infection. Thus the IgG response against Toxoplasma gondii was investigated by immunoblotting in two patients accidentally infected with the RH strain as well as in group of naturally infected patients at acute and chronic phase. There was an overall coincidence of molecular mass among antigens of tachyzoites and tissue cysts recognized by these sera, however, they appear not to be the same molecules. The response against tissue cysts starts early during acute infection, and the reactivity of antibodies is strong against a wide range of antigens. Six bands (between 82 and 151 kDa were exclusively recognized by chronic phase sera but only the 132 kDa band was positive in more than 50% of the sera analysed. A mixture of these antigens could be used to discriminate between the two infection phases. The most important antigens recognized by the acute and the chronic phase sera were 4 clusters in the ranges 20-24 kDa, 34-39 kDa, 58-80 kDa and 105-130 kDa as well as two additional antigens of 18 and 29 kDa. Both accidentally infected patients and some of the naturally infected patients showed a weak specific response against tissue cyst antigens.O reconhecimento do perfil dos antígenos de cistos tissulares pelos anticorpos IgG foi estudado durante a infecção toxoplasmótica aguda e crônica. Assim a resposta de IgG contra Toxoplasma gondii foi investigada pelo "immunoblotting" em dois pacientes acidentalmente infectados com a variedade RH bem como em grupos de pacientes naturalmente infectados nas fases aguda e crônica. Houve uma coincidência global da massa molecular entre antígenos de taquizoitas e cistos tissulares reconhecidos por estes soros, todavia, eles parecem não ser as mesmas moléculas. A resposta contra cistos tissulares começa precocemente durante a infecção aguda e a reatividade de anticorpos é forte

  8. The different effector function capabilities of the seven equine IgG subclasses have implications for vaccine strategies.

    Science.gov (United States)

    Lewis, Melanie J; Wagner, Bettina; Woof, Jenny M

    2008-02-01

    Recombinant versions of the seven equine IgG subclasses were expressed in CHO cells. All assembled into intact immunoglobulins stabilised by disulphide bridges, although, reminiscent of human IgG4, a small proportion of equine IgG4 and IgG7 were held together by non-covalent bonds alone. All seven IgGs were N-glycosylated. In addition IgG3 appeared to be O-glycosylated and could bind the lectin jacalin. Staphylococcal protein A displayed weak binding for the equine IgGs in the order: IgG1>IgG3>IgG4>IgG7>IgG2=IgG5>IgG6. Streptococcal protein G bound strongly to IgG1, IgG4 and IgG7, moderately to IgG3, weakly to IgG2 and IgG6, and not at all to IgG5. Analysis of antibody effector functions revealed that IgG1, IgG3, IgG4, IgG5 and IgG7, but not IgG2 and IgG6, were able to elicit a strong respiratory burst from equine peripheral blood leukocytes, predicting that the former five IgG subclasses are able to interact with Fc receptors on effector cells. IgG1, IgG3, IgG4 and IgG7, but not IgG2, IgG5 and IgG6, were able to bind complement C1q and activate complement via the classical pathway. The differential effector function capabilities of the subclasses suggest that, for maximum efficacy, equine vaccine strategies should seek to elicit antibody responses of the IgG1, IgG3, IgG4, and IgG7 subclasses. PMID:17669496

  9. Serum IgG Subclasses in Autoimmune Diseases

    OpenAIRE

    Zhang, Haoze; Ping LI; Wu, Di; Xu, Dong; Hou, Yong; Qian WANG; Li, Mengtao; Li, Yongzhe; Zeng, Xiaofeng; Zhang, Fengchun; Shi, Qun

    2015-01-01

    Abstract To characterize serum IgG subclass levels in several autoimmune diseases, including primary Sjogren syndrome (pSS), systemic sclerosis (SSc), systemic lupus erythematosus (SLE), and primary biliary cirrhosis (PBC). We aimed to analyze serum IgG subclass distribution and to test whether serum IgG4 levels are elevated in these diseases. Serum IgG subclass levels from 102 pSS, 102 SSc, 100 SLE, and 59 PBC patients, as well as 40 healthy controls (HCs), were measured using the immunoneph...

  10. IgG4 Inflammatory Pseudotumor of the Kidney

    OpenAIRE

    Ahmed N. Alkhasawneh; Allan, Robert W.

    2012-01-01

    Hyper-IgG4 disease is a rare systemic disorder that usually affects middle age males. It is characterized by elevated serum IgG4 levels and infiltration of organs by IgG4 positive plasma cells associated with fibrosis. Patients usually present with mass or masses in the involved organ that mimic neoplasia. While initially described in the pancreas, IgG4-related inflammatory tumors have been now described in many organs. We describe an unusual case of an IgG4-related pseudotumor of the kidney.

  11. Diagnosis of IgG4-related sclerosing cholangitis

    Directory of Open Access Journals (Sweden)

    Shuya Simizu

    2013-01-01

    Full Text Available IgG4-related sclerosing cholangitis (IgG4-SC is often associated with autoimmune pancreatitis. However, the diffuse cholangiographic abnormalities observed in IgG4-SC may resemble those observed in primary sclerosing cholangitis (PSC, and the presence of segmental stenosis suggests cholangiocarcinoma (CC. IgG4-SC responds well to steroid therapy, whereas PSC is only effectively treated with liver transplantation and CC requires surgical intervention. Since IgG4-SC was first described, it has become a third distinct clinical entity of sclerosing cholangitis. The aim of this review was to introduce the diagnostic methods for IgG4-SC. IgG4-SC should be carefully diagnosed based on a combination of characteristic clinical, serological, morphological, and histopathological features after cholangiographic classification and targeting of a disease for differential diagnosis. When intrapancreatic stenosis is detected, pancreatic cancer or CC should be ruled out. If multiple intrahepatic stenoses are evident, PSC should be distinguished on the basis of cholangiographic findings and liver biopsy with IgG4 immunostaining. Associated inflammatory bowel disease is suggestive of PSC. If stenosis is demonstrated in the hepatic hilar region, CC should be discriminated by ultrasonography, intraductal ultrasonography, bile duct biopsy, and a higher cutoff serum IgG4 level of 182 mg/dL.

  12. Report on evaluation of contra-rotating solutions

    OpenAIRE

    Calcagni, Danilo; Salvatore, Francesco; Muscari, Roberto

    2013-01-01

    This report describes results of a computational study on the hydrodynamic performance of two enhanced propulsion concepts based on contra-rotating and podded propellers. The activity is performed by partner INSEAN in the framework of WP23, Task 23.1, of the STREAMLINE Project. The present report is written in fulfillment of Deliverable D23.4. The two propulsion systems consist of (i) a single-shaft propeller placed in front of a pod-mounted propeller, acting in contra-rotation with respect t...

  13. Bibliografía: violencias contra las mujeres

    OpenAIRE

    Fuentes Vásquez, Lya Yaneth

    2001-01-01

    La violencia contra las mujeres, en sus diferentes manifestaciones, pero en particular la violencia intrafamiliar o doméstica y la violencia sexual, constituyen hoy en día en Colombia y en el mundo "cuestiones" de interés público. En efecto, en los años 90 estos tipos de agresión contra las mujeres se colocaron en las agendas tanto internacionales, como nacionales. La campaña de los diferentes organismos de las Naciones Unidas: Una vida sin violencia, un derecho nuestro, lanzada en 1998 para ...

  14. Prevención contra las drogas Prevention against drugs

    OpenAIRE

    Luis Jiménez Herrera

    2010-01-01

    Objetivo: Explorar de manera general algunos aspectos relacionados al tema de la prevención contra las drogas. Metodología: Identificación y revisión de artículos de las bases de datos: EBRARY, E-Libro, EBSCO, ProQuest, Science Direct y Springer Link, con la intención de organizar la información encontrada en las secciones siguientes: contexto general, factores involucrados en el uso y abuso de las drogas, acciones - políticas - prevención contra las drogas y hacia dónde va la investigación. ...

  15. Las Violencias contra las Mujeres en una Sociedad en Guerra

    OpenAIRE

    Sánchez Gómez, Olga Amparo

    2008-01-01

    Las violencias contra las mujeres exceden los acontecimientos violentos, y abarcan su producción y reproducción como fenómeno social y discursivo. Los hechos violentos y los discursos sobre la violencia aparecen entrelazados, especialmente si se piensa en papel que juega la cultura patriarcal en el desarrollo, perpetuación y validación de las violencias contra las mujeres. “A las mujeres nos violan, nos asaltan y nos golpean, nos ultrajan, nos humillan, nos deshumanizan, nos manosean, nos ase...

  16. Detection of IgG1 and IgG4 subtypes reactive against potato apyrase in schistosomiasis patients

    Directory of Open Access Journals (Sweden)

    Priscila de Faria-Pinto

    2010-07-01

    Full Text Available In this paper, we showed for the first time that the conserved domains within Schistosoma mansoni ATP diphosphohydrolase isoforms, shared with potato apyrase, possess epitopes for the IgG1 and IgG4 subtypes, as 24 (80% of the 30 schistosomiasis patients were seropositive for this vegetable protein. The analyses for each patient cured (n = 14 after treatment (AT with praziquantel revealed variable IgG1 and IgG4 reactivity against potato apyrase. Different antigenic epitopes shared between the vegetable and parasite proteins could be involved in susceptibility or resistance to S. mansoni AT with praziquantel and these possibilities should be explored.

  17. OBTENCIÓN DE ANTICUERPOS ESPECÍFICOS PARA LA DETECCIÓN DEL VIRUS TaLMV DEL TOMATE DE ÁRBOL

    Directory of Open Access Journals (Sweden)

    Gutiérrrez Sánchez Pablo Andrés

    2011-08-01

    Full Text Available En Colombia el rendimiento del cultivo de árbol se ha visto seriamente afectado por la expansión de la enfermedad conocida como virosis. Esta patología se registró inicialmente en 1991 en el norte de Antioquia y su expansión ha alcanzado todas las regiones cultivadoras de este frutal en el país. Trabajos recientes han establecido la presencia de al menos dos especies de potyvirus asociadas a la virosis en los cultivos de tomate de árbol de Antioquia: Potato virus Y (PVY y Tamarillo leaf malformation virus (TaLMV, especie propuesta. Con el fin de reducir la diseminación de estos patógenos virales en el país, es necesario contar con herramientas de diagnóstico que permitan la certificación del material de siembra y la detección temprana en plantas asintomáticas. En este trabajo se presenta la obtención de anticuerpos específicos para la detección del virus TaLMV utilizando una región antigénica de 15 residuos de la cápside viral. La sensibilidad y especificidad de los anticuerpos fue evaluada mediante pruebas de ELISA y dot-blot utilizando proteína recombinante y péptidos sintéticos. La utilidad de estos anticuerpos fue validada a partir de una prueba piloto de detección de TaLMV en muestras de plantas de tomate de árbol obtenidas en el Oriente Antioqueño y los resultados comparados con los niveles de detección que ofrece la técnica de RT-PCR con cebadores específicos para la cápside viral de TaLMV.

  18. Charge variants in IgG1

    Science.gov (United States)

    Goswami, Sirj; Hutchinson, Ryan; Kwong, Zephania W; Yang, Jihong; Wang, Xiangdan; Yao, Zhenling; Sreedhara, Alavattam; Cano, Tony; Tesar, Devin; Nijem, Ihsan; Allison, David E; Wong, Pin Yee; Kao, Yung-Hsiang; Quan, Cynthia; Joshi, Amita; Harris, Reed J; Motchnik, Paul

    2010-01-01

    Antibody charge variants have gained considerable attention in the biotechnology industry due to their potential influence on stability and biological activity. Subtle differences in the relative proportions of charge variants are often observed during routine biomanufacture or process changes and pose a challenge to demonstrating product comparability. To gain further insights into the impact on biological activity and pharmacokinetics (PK) of monoclonal antibody (mAb) charge heterogeneity, we isolated the major charge forms of a recombinant humanized IgG1 and compared their in vitro properties and in vivo PK. The mAb starting material had a pI range of 8.7–9.1 and was composed of about 20% acidic variants, 12% basic variants and 68% main peak. Cation exchange displacement chromatography was used to isolate the acidic, basic and main peak fractions for animal studies. Detailed analyses were performed on the isolated fractions to identify specific chemical modification contributing to the charge differences and were also characterized for purity and in vitro potency prior to being administered either subcutaneously (SC) or intravenously (IV) in rats. All isolated materials had similar potency and rat FcRn binding relative to the starting material. Following IV or SC administration (10 mg/kg) in rats, no difference in serum PK was observed, indicating that physiochemical modifications and pI differences among charge variants were not sufficient to result in PK changes. Thus, these results provided meaningful information for the comparative evaluation of charge-related heterogeneity of mAbs and suggested that charge variants of IgGs do not affect the in vitro potency, FcRn binding affinity or the PK properties in rats. PMID:20818176

  19. Vasculitis asociadas a anticuerpos anti-citoplasma de neutrófilos: Clínica y tratamiento

    Directory of Open Access Journals (Sweden)

    María Virginia Paolini

    2013-04-01

    Full Text Available Las vasculitis asociadas a anticuerpos anti-citoplasma de neutrófilos (ANCA comprenden a un grupo de enfermedades caracterizadas por la inflamación de la pared de pequeños vasos. Analizamos las características epidemiológicas y clínicas en una serie de 47 pacientes: 23 (49% granulomatosis de Wegener (GW, 15 (32% poliangeítis microscópica (PAM y nueve (19% vasculitis limitada al riñón (VLR. La edad media al inicio de los síntomas fue de 50.7 ± 14.9 años. La manifestación clínica más frecuente fue el compromiso renal en 41 (87% pacientes, seguido por el pulmonar en 26 (55% y el otorrinolaringológico en 17 (36%. En 26 (55% se asoció compromiso renal y pulmonar. La forma clínica más frecuente fue la generalizada en 23 (49%, seguida por la grave en 18 (38%. El 89% presentaron determinaciones de ANCA positivas. Cuatro (8% no recibieron tratamiento inmunosupresor de inicio. De los 43 que recibieron tratamiento de inicio, 29 (67% tuvieron remisión completa, con un tiempo de remisión promedio de 35.3 meses. Once (26% presentaron recaídas, diez (91% recaídas mayores y uno (9% menor. Doce (28% fallecieron, siete en forma temprana y cinco durante la evolución de la enfermedad. Quince (31% evolucionaron a insuficiencia renal crónica. Los 26 pacientes en seguimiento tuvieron respuesta al tratamiento y 20 (77% de ellos estaban en remisión al finalizar el estudio. Las vasculitis asociadas a ANCA continúan siendo enfermedades de alta morbilidad y mortalidad, a pesar de las mejorías logradas con los tratamientos inmunosupresores.

  20. DETECCIÓN DE ANTICUERPOS IgM A LEPTOSPIRA EN HUMANOS EN RIESGO OCUPACIONAL EN VILLAVICENCIO, META

    Directory of Open Access Journals (Sweden)

    Luz Díaz P

    2008-04-01

    Full Text Available Objetivo. Determinar la seroprevalencia a la infección por leptospira en una población humana y los factores de riesgo ocupacional asociados en Villavicencio, Meta. Materiales y métodos. Se aplicó un modelo epidemiológico transversal con selección por conveniencia de grupos e individuos dentro de grupos. Se obtuvieron muestras de sangre por punción cubital de 273 personas correspondientes a 8 grupos de riesgo. Se obtuvo información de factores de riesgo mediante entrevista. Se determinaron anticuerpos IgM mediante ELISA indirecta. Se utilizó una prueba de c2 mediante el programa SPSS 11.0 para Windows. Resultados. La seroprevalencia general fue 19%. Por grupos fue para trabajadores de matadero 7%, veterinarios y auxiliares de clínica de pequeños animales 17%, estudiantes de último año de MVZ 17%, ordeñadores 21%, trabajadores de arrozales 23%, trabajadores de granjas porcícolas 35%, trabajadores de piscícolas 48%. Se encontraron 3 factores asociados, el estrato rural p = 0.0005 ICCR 1.50 a 3.83, tenencia de mascota canina p = 0.046 ICCR 1.03 a 3.26 y contacto con roedores en el trabajo p = 0.000037 ICCR = 1.73 a 4.75. Conclusiones. Se encontró una alta seroprevalencia general de infectados por Leptospira, siendo los grupos de más alta prevalencia los trabajadores piscícolas y de granjas porcícolas. Se reconoce una vez más el carácter ocupacional de la infección posiblemente por falta de medidas de higiene y protección laboral.

  1. Anticuerpos antiprotrombina y resistencia adquirida a la proteína C activada en el síndrome antifosfolipídico

    OpenAIRE

    Muñoz Rodríguez, Francisco José

    2003-01-01

    El síndrome antifosfolipídico (SAF) se caracteriza clínicamente por la aparición de fenómenos trombóticos recurrentes, complicaciones obstétricas, tales como abortos o pérdidas fetales recurrentes, y trombocitopenia. Inmunológicamente se define por la presencia de los anticuerpos antifosfolipídicos (AAF), un grupo heterogéneo de autoanticuerpos que reconocen complejos constituidos por fosfolípidos de membrana y proteínas plasmáticas que actúan como cofactores. Los mejor conocidos y que ayudan...

  2. Disposición farmacocinética y biodistribución del anticuerpo monoclonal ior EGF/R3 en ratas, conejos y perros

    OpenAIRE

    Fernández-Sanchez, Eduardo; Ducongé Soler, Jorge; Surroca, Amarilys; Perdomo, Yamilé; González, Carlos; Becquer, María de los Angeles

    2002-01-01

    El anticuerpo monoclonal ior EGF/r3, por sus propiedades bloqueadoras del receptor al factor de crecimiento epidérmico, presenta propiedades relevantes en la terapia del cáncer. Se realizó su estudio de caracterización farmacocinética en ratas Wistar a tres niveles de dosis: 0,5, 1 y 2 mg, bolus i.v. Mediante un Análisis por Radiorreceptor se obtuvieron las concentraciones a diferentes intervalos, desde 30 min hasta 96 h, en réplicas de 5x. Las dosis mayores se ajustaron a un transcurso bi-ex...

  3. IgG4 disease: The great masquerader.

    Science.gov (United States)

    Yadav, Divya; Liu, Xiuli; Chahal, Prabhleen

    2016-06-01

    Systemic IgG4 disease can have a wide spectrum of clinical presentation, which can mimic several other disease entities. In this report, we describe a series of two patients with IgG4-related disease who were referred to us initially with the diagnosis of acute cholecystitis and the second patient with metastatic pancreatic adenocarcinoma with peritoneal metastasis respectively. PMID:26164258

  4. IgG4-Related Disease: A Multispecialty Condition

    Directory of Open Access Journals (Sweden)

    Iuri Usêda Santana

    2014-01-01

    Full Text Available IgG4-related disease (IgG4-RD is a recently recognized group of conditions, characterized by tumor-like swelling of involved organs, lymphoplasmacytic infiltrate rich in IgG4-positive plasma cells, variable degrees of fibrosis, and elevated serum IgG4 concentrations. Currently IgG4-RD is recognized as a systemic condition that can affect several organs and tissues. Herein we report the case of a 34-year-old male patient who was admitted to our hospital with diffuse abdominal pain, weight loss, and painful stiffness in his neck. He had a history of tumoral mass of the left maxillary region, right palpebral ptosis with protrusion of the eyeball, and chronic dry cough for about 6 years. Laboratory tests revealed polyclonal hypergammaglobulinemia and increased serum IgG4 levels. Immunohistochemical staining of the maxillary biopsy was compatible with IgG4-RD. He had an excellent response to corticosteroid therapy. This case highlights that IgG4-RD should be included in the differential diagnosis with multisystem diseases.

  5. IgG glycosylation changes and MBL2 polymorphisms

    DEFF Research Database (Denmark)

    Troelsen, Lone N; Jacobsen, Søren; Abrahams, Jodie L;

    2012-01-01

    To examine whether IgG glycosylation changes and MBL2 genotypes are associated with systemic inflammation and joint destruction in rheumatoid arthritis (RA).......To examine whether IgG glycosylation changes and MBL2 genotypes are associated with systemic inflammation and joint destruction in rheumatoid arthritis (RA)....

  6. Clinical study on IgG4-related autoimmune pancreatitis

    Institute of Scientific and Technical Information of China (English)

    吴庆军

    2013-01-01

    Objective To investigate the clinical features of IgG4-related autoimmune pancreatitis(IgG4-related AIP). Methods A prospective cohort study on IgG4 related disease(IgG4-RD) was carried out in Peking Union Medical College Hospital during December 2010 to June

  7. Los anticuerpos y su papel como herramientas analíticas en los ensayos inmunoenzimáticos The antibodies and their role as analytic tools in immunoenzymatic assays

    OpenAIRE

    Anselmo J Otero González

    2010-01-01

    En este trabajo se presentó la historia y evolución, desde el descubrimiento, de los anticuerpos, así como la elucidación de su compleja estructura y función que ha servido de base metodológica para crear paradigmas inimaginables en su momento, como la fina especificidad de reconocimiento; también derrumbar otros, aparentemente inamovibles, como la invariabilidad y universalidad del genoma celular. Se revisó la evolución de los sistemas analíticos basados en la reacción antígeno-anticuerpos p...

  8. Estudio de señales de direccionamiento vacuolar del receptor AtRMR1 y su aplicación en la expresión de un anticuerpo recombinante en plantas

    OpenAIRE

    Scabone, Camila

    2012-01-01

    Existe una creciente necesidad de desarrollo de plataformas de producción, a gran escala y de bajo costo, de anticuerpos completos, de manera de satisfacer sus demandas en los distintos tipos de aplicaciones, terapéuticas o diagnósticas. Las plantas son potencialmente el sistema de producción más económico, sin embargo todavía hay que superar varios obstáculos, entre ellos la degradación proteolítica que impacta sobre la calidad y los niveles de acumulación de los anticuerpos producidos. En e...

  9. VIOLÊNCIA CONTRA MULHERES NA AGENDA MIDIÁTICA

    Directory of Open Access Journals (Sweden)

    Sandra Raquew dos Santos Azevedo

    2011-09-01

    Full Text Available Este artigo faz parte de uma pesquisa mais ampla que objetivou analisar, sob perspectiva sociológica, as práticas de agendamento midiático sobre a violência contra mulheres na imprensa paraibana.

  10. ESTRUCTURA MOLECULAR Y ANTIGÉNICA DE LA VACUNA CONTRA EL VIRUS DEL PAPILOMA HUMANO 16 (VPH 16 Antigenic and Molecular Structure of Human Papillomavirus (HPV 16 Vaccine

    Directory of Open Access Journals (Sweden)

    VÍCTOR ANDRÉS VANEGAS

    Full Text Available La proteína L1 del Virus del Papiloma Humano (VPH constituye el 80% de la cápside viral. Las vacunas profilácticas contra el VPH son sintetizadas a partir de la proteína L1 ensamblada en Partículas similares al Virus (del inglés VLP, las cuales son altamente inmunogénicas generando anticuerpos específicos de tipo y en algunos casos pueden presentar reacción cruzada entre tipos de VPH filogenéticamente próximos. La estructura de la proteína L1 del VPH es importante porque confiere estabilidad a la cápside mediante el establecimiento de interacciones intra e intercapsoméricas lo que asegura la integridad viral y antigénicamente porque contiene los epítopes que inducen la respuesta inmune protectora. En estudios en los que se evaluó la antigenicidad de la proteína L1 se determinó que los epítopes inmunodominantes de la cápside viral se encuentran en los bucles B-C, D-E, F-G, H-I y en el extremo C-terminal. Estos bucles son poco conservados entre los diferentes genotipos y se encuentran en segmentos de la proteína expuestos en la superficie de la cápside. Los aminoácidos situados en los bucles B-C, F-G y H-I son primordiales para el reconocimiento por los anticuerpos neutralizantes. Los diferentes subtipos y variantes presentan cambios en estos aminoácidos o en residuos que conforman otros epítopes. En esta revisión se presentará un estado del arte de la proteína L1 del VPH genotipo 16, la estructura y su importancia en el desarrollo de vacunas contra la infección producida por este virus.Human Papillomavirus L1 protein makes up 80% of the viral capsid and self assembles in Virus-like Particles (VLP; these particles are immunogenic, generate type-specific antibodies and can induce very limited cross-reactivity among highly homologous HPV types. In addition to its structural function, it confers the stability to the capsid by establishing disulfide bonds and other intra and intercapsomeric interactions, and also contains

  11. Produção e caracterização de anticorpos monoclonais contra toxina épsilon de Clostridium perfringens Tipo D Production and characterization of monoclonal antibodies against Clostridium perfringens Type D epsilon toxin

    OpenAIRE

    Theonys Diógenes Freitas; Luis Guilherme Dias Heneine; Felipe Masiero Salvarani; Rodrigo Otávio Silveira Silva; Catarina Guimarães Rocha Dourado Lima; Prhiscylla Sadanã Pires; Ronnie Antunes de Assis; Francisco Carlos Faria Lobato

    2009-01-01

    Clostridium perfringens tipo D é o agente etiológico da enterotoxemia em ruminantes, causada pela toxina épsilon e caracterizada por edema cardíaco, pulmonar, renal e cerebral. Anticorpos monoclonais contra toxina épsilon de C. perfringens tipo D foram produzidos a partir da fusão da linhagen de mieloma P3-X63-Ag8 653 com células do baço de camundongos Balb/c imunizados com o toxóide épsilon. Seis linhagens de híbridos secretores de anticorpos monoclonais das classes e IgM e IgG foram estabel...

  12. IgG transport across mucosal barriers by neonatal Fc receptor for IgG and mucosal immunity.

    Science.gov (United States)

    Yoshida, Masaru; Masuda, Atsuhiro; Kuo, Timothy T; Kobayashi, Kanna; Claypool, Steven M; Takagawa, Tetsuya; Kutsumi, Hiromu; Azuma, Takeshi; Lencer, Wayne I; Blumberg, Richard S

    2006-12-01

    Mucosal secretions of the human gastrointestinal, respiratory, and genital tracts contain significant quantities of IgG. The neonatal Fc receptor for IgG (FcRn) plays a major role in regulating host IgG levels and transporting IgG and associated antigens across polarized epithelial barriers. The FcRn can then recycle the IgG/antigen complex back across the intestinal barrier into the lamina propria for processing by dendritic cells and presentation to CD4(+) T cells in regional organized lymphoid structures. FcRn, through its ability to secrete and absorb IgG, thus integrates luminal antigen encounters with systemic immune compartments and, as such, provides essential host defense and immunoregulatory functions at the mucosal surfaces. PMID:17051393

  13. A homogeneous fluorescence polarization assay for detection of Clostridium perfringenstype D epsilon antitoxin in serum of goats Un ensayo de fluorescencia polarizada homogéneo para detectar anticuerpos contra toxina epsilon de Clostridium perfringenstipo D en suero de cabras

    Directory of Open Access Journals (Sweden)

    F.A. UZAL

    1999-01-01

    Full Text Available A fluorescence polarization assay (FPA was developed to detect Clostridium perfringens type D epsilon antitoxin in serum of goats. Purified epsilon toxin was labelled with fluorescein isothiocyanate and used as a tracer in the test. Seven goat sera with different known concentrations of epsilon antitoxin (as measured by a mouse neutralization test-MNT were used as positive controls. Sera from eleven colostrum-deprived kids were used as negative controls. The inter-assay variation of ten measurements of the seven positive sera varied between 1.56% and 4.85%. The correlation between the FPA values and concentration of epsilon antitoxin (as measured by the MNT was 0.90. This test appears to be a good alternative to the MNT without most of the inconveniences of the laterSe desarrolló un test de fluorescencia polarizada (TFP para detectar antitoxina epsilon de Clostridium perfringens tipo D en suero de cabras. Se marcó toxina epsilon purificada con isothiocianato de fluoresceína y se la usó como tracer en el test. Siete sueros caprinos con diferentes concentraciones conocidas de antitoxina epsilon (titulados por una prueba de seroneutralización en ratones-PSR se utilizaron como controles positivos. Sueros de once chivitos deprivados de calostro se utilizaron como controles negativos. La variación entre ensayos de diez mediciones de los siete sueros positivos control varió entre 1.56% y 4.85%. La correlación entre los valores de TFP y la concentración de antitoxina epsilon (medida por PSR fue de 0.90. Este test parece ser una buena alternativa para la PSR sin los inconvenientes de esta última

  14. Marcadores inflamatórios e anticorpos anti-chlamydia em pacientes com síndrome metabólica Marcadores inflamatorios y anticuerpos anti-chlamydia en pacientes con síndrome metabólico Inflammatory markers and antichlamydial antibodies in patients with metabolic syndrome

    Directory of Open Access Journals (Sweden)

    Rosecler Riethmuller Franco

    2011-02-01

    ão mostraram diferença significativa em pacientes com SM, com e sem eventos.FUNDAMENTO: El síndrome metabólico está asociado al aumento de riesgo de eventos cardiovasculares. Marcadores inflamatorios y anticuerpos anti-Chlamydia han sido relacionados al desarrollo y a la progresión de la aterosclerosis y de los eventos cardiovasculares. OBJETIVO: Evaluar los marcadores inflamatorios interleucina-6 (IL-6 y factor de necrosis tumoral-alfa (TNF-α y los anticuerpos anti-Chlamydia pneumoniae en pacientes con síndrome metabólico (SM, con y sin eventos cardiovasculares. MÉTODOS: Estudio transversal constituido por 147 individuos. De estos, 100 (68% con SM y sin eventos cardiovasculares; y 47 (32% con SM y con eventos cardiovasculares. De los individuos que habían sufrido eventos cardiovasculares, 13 (6,11% presentan infarto agudo de miocardio (IAM, y diez (4,7%, accidente cerebro vascular (ACV. El diagnóstico del SM fue determinado por los criterios del NCEP-ATPIII. RESULTADOS: La media de edad de los sujetos con eventos cardiovasculares fue de 61,26 ± 8,5 y de 59,32 ± 9,9 en los individuos sin esos eventos (p=0,279, habiendo predominio del sexo femenino. El grupo con SM y sin evento presentó mayor peso, altura, IMC y circunferencia abdominal. Para los individuos con eventos cardiovasculares (p=0,001, los marcadores inflamatorios IL-6 y TNF-α y la enfermedad vascular periférica fueron significativamente mayores. Se obtuvieron niveles elevados de anticuerpos IgG para Chlamydia pneumoniae en el grupo SM, sin eventos y de IgA en el grupo con eventos cuando fueron comparados los dos grupos. Con relación al IAM y al ACV, los anticuerpos anti-Chlamydia pneumoniae no demostraron significación estadística, comparados al grupo sin eventos cardiovasculares. Asociación fue observada con el uso de estatinas, hipoglicemiantes orales, inyectables y antiinflamatorios no esteroides en el grupo con esos eventos. CONCLUSIÓN: Marcadores inflamatorios se encuentran

  15. IgG4-related disease of the rectum

    Science.gov (United States)

    Choi, Sung-Bong; Lim, Chul-Hyun; Cha, Myung-Guen

    2016-01-01

    IgG4-related disease is a relatively new disease entity characterized by elevated serum IgG4 levels and marked infiltration of IgG4-positive plasma cells in lesions. Organ enlargement or nodular lesions consisting of abundant infiltration of lymphocytes and IgG4-positive plasma cells and fibrosis are seen in various organs throughout. We encountered a patient with an inflammatory pseudotumor of the rectum, which was histopathologically confirmed to be an IgG4-related disease. The patient was a 28-year-old woman who had constipation for 3 months. The endoluminal ultrasonography showed a lesion that was heterogeneous and low echogenic in lower rectum. The result of colonoscopic biopsy findings was of chronic proctitis with lymphoid aggregates. For a confirmative diagnosis, excision was performed. Histopathological examination represented plasma cell infiltration and fibrosis. Immunohistochemistry revealed prominence of IgG4-positive plasma cells and confirmed the diagnosis of IgG4-related disease. The patient is currently under observation on low-dose oral prednisolone without relapse. PMID:27186575

  16. Diagnosis of IgG4-Related Tubulointerstitial Nephritis

    OpenAIRE

    Raissian, Yassaman; Nasr, Samih H.; Larsen, Christopher P.; Colvin, Robert B.; Smyrk, Thomas C.; Takahashi, Naoki; Bhalodia, Ami; Sohani, Aliyah R.; ZHANG, LIZHI; Chari, Suresh; Sethi, Sanjeev; Fidler, Mary E.; Cornell, Lynn D

    2011-01-01

    IgG4-related systemic disease is an autoimmune disease that was first recognized in the pancreas but also affects other organs. This disease may manifest as tubulointerstitial nephritis (IgG4-TIN), but its clinicopathologic features in the kidney are not well described. Of the 35 patients with IgG4-TIN whose renal tissue specimens we examined, 27 (77%) had acute or progressive chronic renal failure, 29 (83%) had involvement of other organ systems, and 18 of 23 (78%) had radiographic abnormali...

  17. Extrapancreatic findings of IgG4-related disease

    International Nuclear Information System (INIS)

    IgG4-related disease is a systemic fibro-inflammatory condition, which includes autoimmune pancreatitis as part of the disease spectrum. Imaging has been demonstrated to play a major role in the diagnosis of autoimmune pancreatitis. Recognizing the wide spectrum of extrapancreatic manifestations of IgG4-related disease coupled with a high clinical index of suspicion will allow for an accurate and timely diagnosis to be made, thus avoiding unnecessary invasive procedures and ensuring that early effective corticosteroid therapy is commenced. This review aims to serve as a concise reference tool for both clinicians and radiologists in the diagnosis of extrapancreatic IgG4-related disease

  18. Anafilaxia associada à vacina contra sarampo, caxumba e rubéola Anafilaxia asociada a la vacuna contra sarampión, varicela y rubéola Anaphylaxis associated with the vaccine against measles, mumps and rubella

    Directory of Open Access Journals (Sweden)

    Iolanda Maria Novadzki

    2010-04-01

    Full Text Available Estudo do tipo caso-controle cujo objetivo foi descrever os casos e as causas de anafilaxia associada à vacina contra sarampo, caxumba e rubéola. Foram estudados 22 casos notificados em crianças de Curitiba, PR, durante Campanha Nacional de Vacinação de 2004, que apresentaram manifestações mucocutâneas. Para o controle, foram selecionadas 66 crianças vizinhas dos casos, que não apresentaram sintomatologia após a aplicação vacinal. Foram realizadas dosagens séricas de anticorpos para os antígenos vacinais, IgE total e específicas para diversos alérgenos, e testes cutâneos. A resposta vacinal foi adequada, a dosagem de IgE específica e os testes cutâneos mostraram que os alérgenos potenciais constituintes da vacina e a atopia não foram relacionados às reações anafiláticas. Os testes cutâneos com a vacina e o dextrano foram positivos somente nos casos, sugerindo sensibilização por algum componente residual da vacina e possível reação cruzada com o dextrano.Estudio del tipo caso-control cuyo objetivo fue describir los casos y las causas de anafilaxia asociada a la vacuna contra sarampión, varicela y rubéola. Fueron estudiados 22 casos notificados en niños de Curitiba, Sureste de Brasil, durante Campaña Nacional de Vacunación de 2004, que presentaron manifestaciones mococutáneas. Para el control, fueron seleccionados 66 niños vecinos de los casos, que no presentaron sintomatología posterior a la aplicación vacunal. Fueron realizadas dosificaciones séricas de anticuerpos para los antígenos vacunales, IgE total y específicas para diversos alérgenos, y pruebas cutáneas. La respuesta vacunal fue adecuada, la dosificación de IgE específica y las pruebas cutáneas mostraron que los alérgenos potenciales constituyentes de la vacuna y la atopia no fueron relacionados a las reacciones anafilácticas. Las pruebas cutáneas con la vacuna y el dextrano fueron positivas solamente en los casos, sugiriendo

  19. Different glycosylation pattern of human IgG1 and IgG3 antibodies isolated from transiently as well as permanently transfected cell lines.

    Science.gov (United States)

    Vestrheim, A C; Moen, A; Egge-Jacobsen, W; Bratlie, D B; Michaelsen, T E

    2013-05-01

    The effector functions of IgG depend on the presence of carbohydrates attached to asparagine 297 in the Fc-portion. In this report, glycosylation profiles of recombinant wild-type and mutant IgG1 and IgG3 antibodies produced from three cell lines were analysed using LC-ESI-Orbitrap. Clear differences were detected between IgG1 and IgG3 glycoforms, where IgG1 generally contained fucosylated glycoforms, whilst IgG3 mainly were non-fucosylated. When using NS-0 and J558L cells for permanent transfection, IgG1 wt glycoforms differed between the two cell lines, whilst IgG3 wt glycoforms did not. Transiently transfected HEK 293E cells were used to produce IgG1 and IgG3 wt and mutants, affecting complement activation. Cell supernatants were harvested at early and late time points and analysed separately. IgGs harvested late showed simpler and less developed glycosylation structure compared to those harvested early. The IgG harvested early was slightly more effective in complement activation than those harvested late, whilst the antibody-dependent cell-mediated cytotoxicity was unaltered. Generally, the glycosylation pattern of the mutants tested, including a hinge truncate mutant of IgG3, did not differ significantly from the wild-type IgGs. The striking difference in glycosylation pattern of IgG1 compared to IgG3 therefore appears not to be due to the long hinge region of IgG3 (62 amino acids) relative to the IgG1 hinge region (15 amino acids). Furthermore, mutation variants at or near the C1q binding site showed similar glycosylation structure and difference in their complement activation activity observed earlier is thus most likely due to differences in protein structure only. PMID:23488770

  20. Algunos aspectos sobre el estado de colonización y estado serológico en cerdas vacunadas contra Mycoplasma hyopneumoniae y de sus lechones según el número ordinal de partos Some aspects about the colonization and serologic state of Mycoplasma hyopneumoniae vaccinated sows and their piglets by parity distribution

    Directory of Open Access Journals (Sweden)

    P Tamiozzo

    2011-01-01

    Full Text Available Para determinar el estado de colonización y el estado serológico de lechones y de cerdas de diferente número ordinal de partos, entre 78 y 81 hembras vacunadas de manera múltiple contra Mycoplasma hyopneumoniae (Mh fueron muestreadas (de 1er a 9no parto al día 0 de gestación, a las 8 semanas de preparto y al postparto y 163 lechones a las dos semanas de edad, tomando muestras de sangre (para enzimoinmuno ensayo, ELISA e hisopados nasales (para reacción en cadena de polimerasa, PCR. Además de los porcentajes de seropositivos y PCR positivos, se calcularon otros valores para determinar la concentración de anticuerpos y así analizar la dinámica de los anticuerpos en hembras y lechones. El porcentaje de cerdas seropositivas fue alto, al igual que los valores de título. Lo mismo se observó en los lechones, por lo que se concluyó que la múltiple vacunación de las primeras garantiza un alto nivel de anticuerpos en sus crías, aunque no es del 100%. Las cerdas de intermedio número de partos presentaron una mayor variabilidad en aquellos valores que reflejan la concentración de anticuerpos; siendo al día cero de gestación las hembras de primer parto las que mostraron estos valores más bajos. Al postparto las hembras más jóvenes y su descendencia mostraron los mayores porcentajes de nPCR positivos. Si bien las cerdas (y los lechones, al aumentar el número ordinal de partos, presentaron una mayor concentración de anticuerpos, esto puede deberse tanto a la vacunación como a la exposición repetida de los animales al Mh en condiciones de campo.The aim of this study was to determine the colonization and serologic state of piglets and sows of different ordinal number of farrowings. Between 78 and 81 sows, multiple-vaccinated against Mycoplasma hyopneumoniae (Mh, were sampled (from 1st to 9th parity at day 0 of gestation, 8 weeks of pre-farrowing and post-farrowing, and 163 piglets at two weeks old, taking blood samples (for enzime

  1. IgG4-RELATED DISEASE. CLINICAL NOTES

    Directory of Open Access Journals (Sweden)

    Vladimir Ivanovich Vasilyev

    2013-12-01

    Full Text Available IgG4-related diseases are a new nosological entity that encompasses a few previously known diseases. IgG4-related systemic disease is diagnosed if two or more affected organs are detected. This group of diseases has two similar signs: serological (elevated serum IgG4 subclass concentrations and histological (organ and tissue infiltration from plasmo-cytes secreting IgG4, and eosinophils, and the development of fibrosclerosis and phlebitis obliterans. The paper describes two cases. In one case, a multisystemic disease was observed virtually at its onset whereas in the other this lesion was diagnosed several years after the natural course of the disease.

  2. Indel Group in Genomes (IGG) Molecular Genetic Markers.

    Science.gov (United States)

    Toal, Ted W; Burkart-Waco, Diana; Howell, Tyson; Ron, Mily; Kuppu, Sundaram; Britt, Anne; Chetelat, Roger; Brady, Siobhan M

    2016-09-01

    Genetic markers are essential when developing or working with genetically variable populations. Indel Group in Genomes (IGG) markers are primer pairs that amplify single-locus sequences that differ in size for two or more alleles. They are attractive for their ease of use for rapid genotyping and their codominant nature. Here, we describe a heuristic algorithm that uses a k-mer-based approach to search two or more genome sequences to locate polymorphic regions suitable for designing candidate IGG marker primers. As input to the IGG pipeline software, the user provides genome sequences and the desired amplicon sizes and size differences. Primer sequences flanking polymorphic insertions/deletions are produced as output. IGG marker files for three sets of genomes, Solanum lycopersicum/Solanum pennellii, Arabidopsis (Arabidopsis thaliana) Columbia-0/Landsberg erecta-0 accessions, and S. lycopersicum/S. pennellii/Solanum tuberosum (three-way polymorphic) are included. PMID:27436831

  3. Documento de Protección Contra Explosiones en Bodega.

    OpenAIRE

    Camas Del Aguila, Araceli

    2016-01-01

    Se presenta el Trabajo De Fin de Grado que tiene como título "Documento de Protección Contra Explosiones en Bodega". Se trata del estudio de la clasificación de zonas con riesgo de explosión dentro de una bodega, así como la evaluación de riesgos y las medidas preventivas y de protección a adoptar.

  4. PRO AND CONTRA OPINIONS REGARDING A SME ACCOUNTING STANDARD

    OpenAIRE

    Adriana Tiron Tudor; Alexandra Mutiu

    2008-01-01

    The IASB's proposed IFRS for SMEs opened an internationaleffervescent debate in academics and practitioners environments. In our research, weintent to collect pertinent evidence for pro and contra arguments and to investigatewhether the proposed IFRS for SMEs is likely to meet the needs of users of financialreports of SME. Our aim is to contribute to the SME accounting area of knowledge,knowing that very little research has been previously conducted looking specifically ofaccounting at SME le...

  5. IgG4-Related Disease: Imitating A Great Imitator

    OpenAIRE

    Fenderson, Joshua; Berenberg, Jeffrey; Tom, Linda; Gress, Francis

    2015-01-01

    Immunoglobulin G4-related disease (IgG4-RD) is a rare, but increasingly recognized, multi-organ fibro-inflammatory condition characterized by distinct pathologic and histologic features. The clinical variability and relative novelty of IgG4-RD make accurate diagnosis of the condition quite challenging. We report a case of a 71-year-old man presenting with hypertrophy of the facial glands and generalized lymphadenopathy who was previously diagnosed with sarcoidosis. We recognized that he had a...

  6. Anticuerpos anti 21 hidroxilasa séricos en pacientes con anticuerpos antifracción microsomal: Síndrome poliendocrino autoinmune Seric 21- hydroxilase antibodies in patients with anti-microsomal fraction antibodies: Autoimmune polyendocrine syndrome

    Directory of Open Access Journals (Sweden)

    Silvia Botta

    2007-04-01

    Full Text Available El síndrome poliendocrino autoinmune (SPA es la asociación de enfermedades endocrinas autoinmunes con otros desórdenes autoinmunes no endocrinos. Los tipos 1, 2 y 4 presentan adrenalitis autoinmune, esto indica la presencia de autoanticuerpos, y su marcador serológico específico es el anti 21 hidroxilasa (a21-OH. El SPA tipo 2 es la asociación de adrenalitis, enfermedad tiroidea y/o diabetes mellitus inducidas por autoanticuerpos. Como componentes menores, pueden estar asociados entre otros, vitiligo, alopecia y miastenia. Nuestros objetivos fueron: establecer la prevalencia de a21-OH séricos en pacientes con anticuerpos anti fracción microsomal (AFM positivos, enfermedad tiroidea autoinmune y/o afecciones endocrinas y no endocrinas autoinmunes; diagnosticar formas incompletas de SPA y estudiar individuos con probable riesgo de progresión a un SPA completo. Estudiamos 72 pacientes AFM positivos y 60 sujetos tomados como grupo control, AFM negativos. Hallamos a21-OH elevados en dos pacientes: A= 47 U/ml, hipotiroidismo autoinmune y miastenia; y B= 8.75 U/ml, hipotiroidismo autoinmune y vitiligo; ambos con ausencia de insuficiencia adrenal. La prevalencia de a21-OH encontrada fue del 2.8%. Las pacientes A y B corresponden a un SPA tipo 2 incompleto y latente en relación al componente adrenal. Considerando a los a21-OH marcadores de enfermedad autoinmune latente, el eventual riesgo de evolución hacia la afección clínica sugiere la necesidad de estrechos controles clínicos y bioquímicos periódicos.Autoimmune polyendocrine syndrome (APS is the association of autoimmune endocrine diseases, with other autoimmune nonendocrine disorders. APS types 1, 2 and 4 include autoimmune adrenalitis; this suggests the presence of autoantibodies. A specific serological marker for these is the anti 21- hydroxilase autoantibody (a21-OH. APS type 2 is the association of autoimmune adrenalitis, to autoimmune thyroid disease and/or diabetes mellitus, all

  7. IgG Placental Transfer in Healthy and Pathological Pregnancies

    Directory of Open Access Journals (Sweden)

    Patricia Palmeira

    2012-01-01

    Full Text Available Placental transfer of maternal IgG antibodies to the fetus is an important mechanism that provides protection to the infant while his/her humoral response is inefficient. IgG is the only antibody class that significantly crosses the human placenta. This crossing is mediated by FcRn expressed on syncytiotrophoblast cells. There is evidence that IgG transfer depends on the following: (i maternal levels of total IgG and specific antibodies, (ii gestational age, (iii placental integrity, (iv IgG subclass, and (v nature of antigen, being more intense for thymus-dependent ones. These features represent the basis for maternal immunization strategies aimed at protecting newborns against neonatal and infantile infectious diseases. In some situations, such as mothers with primary immunodeficiencies, exogenous IgG acquired by intravenous immunoglobulin therapy crosses the placenta in similar patterns to endogenous immunoglobulins and may also protect the offspring from infections in early life. Inversely, harmful autoantibodies may cross the placenta and cause transitory autoimmune disease in the neonate.

  8. IgG4-Related Disease in a Urachal Tumor

    Directory of Open Access Journals (Sweden)

    Travis W. Dum

    2014-01-01

    Full Text Available IgG4-related disease is a newly recognized fibroinflammatory disorder that has the ability to affect nearly every organ system. It is characterized by tumefactive lesions and fibrosis and closely mimics neoplasms. Only one case of IgG4-related bladder mass has been reported in the literature, but there are no reports of IgG4-related disease in a urachal mass. Herein, we report a 26-year-old male who initially presented with symptoms of recurrent UTI. Work-up revealed a 6 cm urachal tumor, a 1.4 cm pulmonary lesion, and mediastinal lymphadenopathy; all metabolically active on PET scan and suspicious for urachal adenocarcinoma. Lung lesion fine needle aspiration and TURBT pathology revealed inflammation but no evidence of malignancy. The patient underwent a partial cystectomy and umbilectomy with pathology demonstrating dense plasmacytic cells, a high rate of immunohistochemistry staining positive for IgG4 plasma cells, a storiform pattern of fibrosis, and an obliterative phlebitis. Furthermore, the patient had an elevated serum IgG4 level of 227 mg/dL (range 2.4–121 mg/dL. IgG4-related disease is a newly recognized fibroinflammatory disorder that can mimic neoplastic processes and a high index of suspicion and accurate tissue pathology is necessary for an accurate diagnosis.

  9. IgG4-Related Disease in a Urachal Tumor.

    Science.gov (United States)

    Dum, Travis W; Zhang, Da; Lee, Eugene K

    2014-01-01

    IgG4-related disease is a newly recognized fibroinflammatory disorder that has the ability to affect nearly every organ system. It is characterized by tumefactive lesions and fibrosis and closely mimics neoplasms. Only one case of IgG4-related bladder mass has been reported in the literature, but there are no reports of IgG4-related disease in a urachal mass. Herein, we report a 26-year-old male who initially presented with symptoms of recurrent UTI. Work-up revealed a 6 cm urachal tumor, a 1.4 cm pulmonary lesion, and mediastinal lymphadenopathy; all metabolically active on PET scan and suspicious for urachal adenocarcinoma. Lung lesion fine needle aspiration and TURBT pathology revealed inflammation but no evidence of malignancy. The patient underwent a partial cystectomy and umbilectomy with pathology demonstrating dense plasmacytic cells, a high rate of immunohistochemistry staining positive for IgG4 plasma cells, a storiform pattern of fibrosis, and an obliterative phlebitis. Furthermore, the patient had an elevated serum IgG4 level of 227 mg/dL (range 2.4-121 mg/dL). IgG4-related disease is a newly recognized fibroinflammatory disorder that can mimic neoplastic processes and a high index of suspicion and accurate tissue pathology is necessary for an accurate diagnosis. PMID:25202466

  10. Estimation of anti-D IgG in red blood cell eluates using the specific radioactivity of 125I-labeled IgG: effect of unlabeled, cytophilic IgG

    Energy Technology Data Exchange (ETDEWEB)

    Masouredis, S.P.; Mahan, L.C.; Sudora, E.J.; Langley, J.W.; Victoria, E.J.

    1981-01-01

    The specific radioactivity of conventionally prepared 125I IgG anti-D eluates is significantly less (from 1/5 to 1/20) than that of the 125I IgG fraction used to prepare the eluate. This discrepancy is due to the release of unlabeled, cytophilic IgG from normal red blood cells during eluate preparation and does not represent an underestimation of the eluate anti-D IgG content. Cytophilic IgG content of eluates plays an important role in reducing the nonimmunologic binding of labeled antibody IgG. The results justify the assumption used in numerous studies that the specific radioactivity of 125I IgG fractions can be used to provide a valid estimate of the anti-D IgG content of eluates.

  11. OBTENCIÓN, PURIFICACIÓN Y CARACTERIZACIÓN DE IgG POLICLONAL DE CONEJO ANTI-LIPOPROTEÍNA (a HUMANA

    Directory of Open Access Journals (Sweden)

    Aidelian Jevey González

    2005-01-01

    Full Text Available Las altas concentraciones séricas de Lp(a, una lipoproteína similar a la lipoproteína de baja densidad (LDL, se asocian a afecciones coronarias, cerebrovasculares y periféricas derivadas de la ateroesclerosis. A esta lipoproteína se le atribuyen propiedades trombogénicas y efectos inhibitorios sobre los mecanismos fibrinolíticos. Diferentes métodos han sido utilizados para la cuantificación sérica de la Lp(a, dentro de estos se destacan los métodos inmunoenzimáticos (ELISA. En este trabajo se describe el proceso de obtención, purificación y caracterización de uno de los reactivos biológicos necesarios para el montaje de un sistema inmunoenzimático ELISA que cuantifique Lp(a en suero humano. Este reactivo es un suero policlonal hiperinmune como fuente de IgG policlonal de conejo anti-Lp(a humana. Utilizando Lp(a humana comercial, se inmunizaron dos conejos hembras según esquema de inmunización propuesto, se lograron títulos de anticuerpos anti-Lp(a humana en los dos animales. Con la utilización de métodos no cromatográficos (precipitación por salado y métodos cromatográficos (Gel filtración e intercambio iónico se purificó la IgG policlonal de conejo anti-Lp(a humana. A esta IgG purificada se le determinó el grado de pureza (SDS-PAGE y la actividad biológica (inmunodifusión doble. La biomolécula purificada mostró el grado de pureza necesario para los fines en que será utilizada, así como reconoció el antígeno empleado en la inmunización.

  12. Increased IgG4-Positive Plasma Cells in Granulomatosis with Polyangiitis: A Diagnostic Pitfall of IgG4-Related Disease

    OpenAIRE

    Eunhee S. Yi; Ryu, Jay H.; Lewis, Jean E; Sing Yun Chang; Karina Keogh

    2012-01-01

    Granulomatosis with polyangiitis (Wegener's) (GPA) may mimic IgG4-related disease (IgG4-RD) on histologic examination of some biopsies, especially those from head and neck sites. IgG4 immunostain is often performed in this context for differential diagnosis with IgG4-RD. However, the prevalence of IgG4+ cells in GPA has not been explored. We examined the IgG4+ cells in 26 cases confirmed as GPA by a thorough clinical and pathologic assessment. Twenty-six biopsies consisted of 14 sinonasal/ora...

  13. Membranous nephropathy with monoclonal IgG4 deposits and associated IgG4-related lung disease

    OpenAIRE

    Omokawa, Ayumi; Komatsuda, Atsushi; Hirokawa, Makoto; Wakui, Hideki

    2014-01-01

    A 62-year-old woman was admitted for nephrotic syndrome and lung tumor. A renal biopsy showed membranous features of the glomeruli. Immunofluorescence studies revealed granular IgG4-κ deposits along with the glomerular basement membrane. Electron microscopy revealed granular electron-dense deposits. Further study denied multiple myeloma. Light microscopy of the resected lung tumor revealed IgG4-related lung disease with no malignancy. Steroid therapy induced a remission of the nephrotic syndr...

  14. Estudio comparativo del efecto protector de dos esquemas de inmunización con una vacuna recombinante contra la Hepatitis B en estudiantes del área de ciencias de la salud susceptibles

    Directory of Open Access Journals (Sweden)

    L Marocho

    2005-10-01

    Full Text Available Objetivo: Demostrar que el efecto protector contra la Hepatitis B en estudiantes menores de 30 años del área de Ciencias de la Salud susceptibles es similar luego de completar los dos esquemas de vacunación (acortado y convencional en menor tiempo y con menos dosis. Hipotesis: Los 3 esquemas de dosificación en la vacuna contra la hepatitis B generan anticuerpos por encima de 10 ug/100 ml generando igual efecto de protección. Diseño: Analítico, experimental, longitudinal, prospectivo y de cohortes concurrentes. Material y Métodos: Un total de 100 alumnos de ambos sexos de Tecnología Médica de la Facultad de Medicina de la UNMSM susceptibles fueron enrolados, quedaron para el análisis final, 89 alumnos tomando en cuenta los criterios de inclusión y exclusión de acuerdo al objetivo de estudio. Se administró la vacuna a la dosis de 20 ug del antigeno de superficie en 1 mL, en tres esquemas de dosificación; 0, 1, 6 meses, 0,1,2 meses y 0,1 meses y se tomaron muestras de sangre antes y a 1,2, 6 y 7 meses de la primera dosis de vacuna para determinación de anti.HBs. Se definió como seroprotección un valor o = a 10 mUI/mL de anti-HBs. Resultados: en base a los 89 alumnos menores de 30 años, cuya edad promedio fue 23.5 años, siendo el 51.7% (46 del sexo masculino y 48.3% (43 sexo femenino. A los 30 días de la primera dosis el 12.4% alcanzó protección, a los 30 días posterior a la segunda dosis el 98.8% y a los 180 días el 100% de protección. Después de la segunda dosis los tres grupos alcanzaron títulos protectores, y al final del estudio los niveles promedios de anticuerpos estuvieron entre 532.7 mUI/mL y 1237.2 mUI/mL Conclusiones: En el presente estudio se logró alcanzar hasta los 7 meses después de la primera dosis, igual efecto protector contra la Hepatitis B mediante la administración de la vacuna con tres esquemas de vacunación diferentes: esquema convencional de tres dosis (0,1,6 meses, esquema acortado de dos

  15. Nuevos avances y retos en la lucha contra el terrorismo

    Directory of Open Access Journals (Sweden)

    José Escribano Úbeda-Portugués

    2009-01-01

    Full Text Available El fenómeno del Terrorismo tiene un carácter eminentemente de consecución de objetivos políticos, lo cual diferencia tal actividad ilícita respecto a las actividades ilícitas propias de la Delincuencia Organizada. Aunque en la financiación del Terrorismo, los grupos terroristas realizan actividades ilícitas propias de la Delincuencia Organizada como el tráfico ilícito de drogas, el tráfico ilícito de armas o el Blanqueo de Capitales.La evolución normativa contra el Terrorismo es amplia, habiéndose desarrollado proyectos de instrumentos jurídico internacionales ya en el Derecho Internacional Clásico.En cuanto al marco jurídico actual, cabe resaltar que la obra de Naciones Unidas al respecto es amplia. Existen actualmente 13 Convenios sobre las distintas manifestaciones del Terrorismo. De ellos hay cuatro Convenios sobre Terrorismo Aéreo; dos sobre el Terrorismo Marítimo; dos sobre el Terrorismo Nuclear; uno sobre el Terrorismo contra personas internacionalmente protegidas; uno contra el Terrorismo de toma de rehenes; uno sobre explosivos plásticos; uno sobre atentados terroristas con bombas, y por último, un Convenio Internacional contra la financiación del Terrorismo.La obra de Naciones Unidas al respecto es amplia, pero está fragmentada en torno a cada una de las manifestaciones del Terrorismo. Bien es verdad que Naciones Unidas ha conseguido crear órganos ad hoc en el marco del Consejo de Seguridad o que ha realizado numerosas Resoluciones al respecto tanto del Consejo de Seguridad, como a nivel de la Asamblea General. Estamos, por tanto, ante un carácter fragmentario del marco jurídico actual en la lucha contra el Terrorismo en el plano de Naciones Unidas por falta de consenso sobre el concepto mismo de “ Terrorismo “.El problema de definir de forma consensuada el concepto se encuentra en la dificultad de trazar la línea divisoria entre actividades terroristas y movimientos de liberación nacional. Por ello se

  16. IgG and IgG subclasses antibody responses to rK39 in Leishmania donovani infections

    International Nuclear Information System (INIS)

    Leishmania donovani infection cause a wide spectrum of human diseases ranging from self-healing subclinical infections to severe visceral leishmaniasis, post kal-azar dermal leishmaiasis, and mucosal leishmaiasis. The infection associated with high levels of anti-leishmania antibodies which offer a potential parameter for the serological diagnosis of L. donovani infection replacing the invasive parasitological methods. rK39, a cloned antigen of L. chagasis was reported to have high levels of anti-leishmania antibodies in Sudanese and American visceral leishmaniasis patients. In an assessment of rK39-ELISA in detecting L. donovani infection we found that the antigen detected visceral leishmaniasis, post kala-azar dermal leishmaniasis, and mucosal leismaniasis with the sensitives of 96.6%, 95.91% and 90.91% respectively. The test has the specificity of 96.7%. Further investigation of 25 visceral leishmaniasis patients showed elevated anti-rK39 antibody responses of IgG subclasses with IgG1 and IgG3 significantly higher than IgG4. igG3 showed the highest sensitivity (84.00%) whereas IgG1 showed the highest sensitivity (100%). The dynamics of the serological reactivity to rK39 in l.donovani infections will be discussed in relation to exposure, infection, cure and relapse.(Author)

  17. In-depth analysis of subclass-specific conformational preferences of IgG antibodies

    DEFF Research Database (Denmark)

    Tian, Xinsheng; Vestergaard, Bente; Thorolfsson, Matthias; Yang, Zhiru; Rasmussen, Hanne B.; Langkilde, Annette Eva

    2015-01-01

    IgG subclass-specific differences in biological function and in vitro stability are often referred to variations in the conformational flexibility, while this flexibility has rarely been characterized. Here, small-angle X-ray scattering data from IgG1, IgG2 and IgG4 antibodies, which were designed...

  18. Desarrollo de superficies modificadas oro - anticuerpo anti-PSPB para su uso como biosensor en la detección de preñez bovina

    OpenAIRE

    Justo Laíz; Karen Keel; Juan Pablo Tosar

    2011-01-01

    En este trabajo se presentan los resultados preliminares para el desarrollo de un biosensor amperométrico destinado a la cuantificación de Proteína B Específica de la Preñez (PSPB) en fluidos biológicos como medio de diagnóstico clínico precoz de la preñez bovina. A la superficie de oro modificada con ácido mercaptoundecanoico (MUA) se fijaron anticuerpos anti-PSPB y peroxidasa de rábano (HRP). Se verificó la inmovilización de las biomoléculas mediante voltamperometría cíclica y medida del án...

  19. DETECTION OF ANTIBODIES TO ANAPLASMA, BARTONELLA AND COXIELLA IN RURAL INHABITANTS OF THE CARIBBEAN AREA OF COLOMBIA

    Directory of Open Access Journals (Sweden)

    Salim Máttar

    2006-12-01

    Full Text Available Objetivo. Establecer la seroprevalencia de Bartonella spp, Anaplasma phagocytophilum (antesErlichia y Coexiella burnetii. Materiales y métodos. Se analizaron sueros representativos de unsector de la población en el año 2003, recolectados de personas que trabajan en actividades delcampo en los departamentos de Córdoba y Sucre que sirvieron como población base de las muestrasque se obtuvieron. Los trabajadores rurales elegidos a participar tenían entra 16 – 65 años deedad. Los sueros fueron examinados por IFA para detección de anticuerpos contra IgG para Bartonellaspp, Erlichia Anaplasma phagocytophilum y Coexiella burnetii. Resultados. La seroprevalencia deanticuerpos de todos los microorganismos estudiados fue de 56.8%. De 81 muestras de sueroanalizadas el 26.6% fueron seropositivas contra C. burnetii, el 37.7% tuvieron anticuerpos contraBartonella y el 20% de los individuos evaluados fueron seropositivos para Anaplasmaphagocytophilum. Conclusiones. Nuestros datos indican que la prevalencia de anticuerpos contraBartonella, A. phagocytophilum y C. burnetii son altos en nuestra región. Los resultados indicanque estas enfermedades zoonoticas son muy comunes en las personas que residen en el área delcaribe colombiano. Este estudio demuestra por primera vez la presencia de estos microorganismosen Colombia.

  20. Potential Mechanisms for IgG4 Inhibition of Immediate Hypersensitivity Reactions

    OpenAIRE

    James, Louisa K.; Till, Stephen J.

    2016-01-01

    IgG4 is the least abundant IgG subclass in human serum, representing less than 5% of all IgG. Increases in IgG4 occur following chronic exposure to antigen and are generally associated with states of immune tolerance. In line with this, IgG4 is regarded as an anti-inflammatory antibody with a limited ability to elicit effective immune responses. Furthermore, IgG4 attenuates allergic responses by inhibiting the activity of IgE. The mechanism by which IgG4 inhibits IgE-mediated hypersensitivity...

  1. Immunohistochemical Characteristics of IgG4-Related Tubulointerstitial Nephritis: Detailed Analysis of 20 Japanese Cases

    OpenAIRE

    Mitsuhiro Kawano; Ichiro Mizushima; Yutaka Yamaguchi; Naofumi Imai; Hitoshi Nakashima; Shinichi Nishi; Satoshi Hisano; Nobuaki Yamanaka; Motohisa Yamamoto; Hiroki Takahashi; Hisanori Umehara; Takao Saito; Takako Saeki

    2012-01-01

    Although tubulointerstitial nephritis with IgG4+ plasma cell (PC) infiltration is a hallmark of IgG4-related kidney disease (IgG4-RKD), only a few studies are available about the minimum number of IgG4+ PC needed for diagnosis along with IgG4+/IgG+ PC ratio in the kidney. In addition, the significance of the deposition of IgG or complement as a reflection of humoral immunity involvement is still uncertain. In this study, we analyzed 20 Japanese patients with IgG4-RKD to evaluate the number of...

  2. Spectrum of Disorders Associated with Elevated Serum IgG4 Levels Encountered in Clinical Practice

    OpenAIRE

    Eunhee S. Yi; Tobias Peikert; Hiroshi Sekiguchi; Ryu, Jay H.; Ryohei Horie

    2012-01-01

    IgG4-related disease (IgG4-RD) is a recently described systemic fibroinflammatory disease associated with elevated circulating levels of IgG4 and manifests a wide spectrum of clinical presentations. Although serum IgG4 level has been described to be the most sensitive and specific laboratory test for the diagnosis of IgG4-RD, it is recognized that an elevated serum IgG4 level can be encountered in other diseases. In this study, we sought to identify the frequency of IgG4-RD and other disease ...

  3. Does the Maternal Serum IgG Level during Pregnancy in Primary Antibody Deficiency Influence the IgG Level in the Newborn?

    Directory of Open Access Journals (Sweden)

    Vasantha Nagendran

    2015-01-01

    Full Text Available Purpose. To find out if the serum IgG level in the newborn baby was affected by low maternal serum IgG during pregnancy in two newly diagnosed primary antibody deficient patients. Method. Infant cord blood IgG level was compared with maternal IgG level in 2 mothers with newly diagnosed primary antibody deficiency, who declined replacement IgG treatment during pregnancy. Results. Both mothers delivered healthy babies with normal IgG levels at birth. Conclusions. The normal IgG levels and sound health in these 2 babies in spite of low maternal IgG throughout pregnancy raise interesting discussion points about maternofoetal immunoglobulin transport mechanisms in primary antibody deficiency.

  4. Membranous nephropathy with repeated flares in IgG4-related disease

    OpenAIRE

    Kanda, Hiroko; Koya, Junji; Uozaki, Hiroshi; Tateishi, Shoko; Sato, Kojiro; Hagino, Noboru; Sawada, Tetsuji; Yamamoto, Kazuhiko

    2013-01-01

    IgG4-related disease (IgG4-RD) is associated with the infiltration of IgG4-positive plasma cells into various organs. Nephropathy of IgG4-RD is generally interstitial nephritis and glomerulonephritis is rare. We describe a case of membranous nephropathy (MN) without interstitial nephritis associated with IgG4-RD symptoms including lymphadenopathy and pulmonary and pleural lesions. Treatment with steroids improved these clinical symptoms, but withdrawal of steroids induced the repeated relapse...

  5. Orbital Pseudotumor: Uncommon Initial Presentation of IgG4-Related Disease

    OpenAIRE

    Teresa Carbone; Ricardo Azêdo Montes; Beatriz Andrade; Pedro Lanzieri; Luis Mocarzel

    2015-01-01

    IgG4-related disease (IgG4-RD) encompasses a group of fibroinflammatory conditions recognized in recent times. The main clinical features include variable degrees of tissue fibrosis, tumorlike expansions, perivascular lymphocytic infiltration rich in IgG4-positive plasma cells, and elevated serum IgG4. A case has been reported of an elderly patient with an unexplained unilateral exophthalmia; biopsy was performed and revealed lymphocytic infiltration, suggesting IgG4-RD. High serum levels of ...

  6. Systemic IgG4-related disease with extensive peripheral nerve involvement that progressed from localized IgG4-related lymphadenopathy: an autopsy case

    OpenAIRE

    Fujii, Masayoshi; Sato, Yasuharu; Ohara, Nobuya; Hashimoto, Kenji; KOBASHI, HARUHIKO; Koyama, Yoshinobu; Yoshino, Tadashi

    2014-01-01

    A 77-year-old man, with a lengthy medical history of chronic dysuria, constipation, hypertension, myocardial infarction, and a submandibular lymphadenopathy that was excised 3 years ago, was hospitalized due to elevated liver enzyme levels. He demonstrated hypergammaglobulinemia, hyperproteinemia, high levels of IgG and IgG4, eosinophilia, sclerosing cholangitis, and retroperitoneal fibrosis. He was diagnosed with IgG4-related disease (IgG4-RD). While hospitalized, he had several episodes of ...

  7. Efeito protetor do aleitamento materno contra a obesidade infantil

    Directory of Open Access Journals (Sweden)

    Balaban Geni

    2004-01-01

    Full Text Available OBJETIVO: Apresentar uma revisão da literatura sobre a hipótese de que o aleitamento materno teria um efeito protetor contra a obesidade infantil, a plausibilidade biológica dessa hipótese e os mecanismos potencialmente envolvidos. FONTES DOS DADOS: Informações coletadas a partir de artigos publicados em revistas científicas indexadas, livros e teses de pós-graduação. A maioria dos artigos foi identificada a partir das bases de dados MEDLINE e Scielo, usando as palavras-chave "aleitamento materno", "sobrepeso", "obesidade", "crianças" e "adolescentes". O período pesquisado foi de 1980 a 2002. Outros artigos foram identificados a partir das referências bibliográficas citadas nos primeiros artigos. SÍNTESE DOS DADOS: A maioria dos estudos revisados relatou um efeito protetor do aleitamento materno contra a obesidade infantil; alguns estudos não encontraram associação entre aleitamento materno e obesidade; um estudo, com um pequeno tamanho amostral, relatou maior adiposidade entre as crianças que receberam aleitamento materno. Diferentes definições de exposição e desfecho dificultam a comparação entre os estudos. Imprinting metabólico foi sugerido como um mecanismo potencialmente envolvido para explicar a associação. Aspectos comportamentais também podem estar envolvidos. CONCLUSÃO: O aleitamento materno parece ter um efeito protetor contra a obesidade infantil, porém essa questão merece uma investigação mais aprofundada.

  8. Nuevos avances y retos en la lucha contra el terrorismo

    OpenAIRE

    José Escribano Úbeda-Portugués

    2009-01-01

    El fenómeno del Terrorismo tiene un carácter eminentemente de consecución de objetivos políticos, lo cual diferencia tal actividad ilícita respecto a las actividades ilícitas propias de la Delincuencia Organizada. Aunque en la financiación del Terrorismo, los grupos terroristas realizan actividades ilícitas propias de la Delincuencia Organizada como el tráfico ilícito de drogas, el tráfico ilícito de armas o el Blanqueo de Capitales.La evolución normativa contra el Terrorismo es amplia, habié...

  9. Tratamiento contra la rabia humana: un poco de su historia

    OpenAIRE

    Maria Cristina Schneider; Carlos Santos-Burgoa

    1994-01-01

    El presente trabajo es una revisión histórica del tratamiento utilizado contra la rabia humana, desde la antigüedad hasta el momento actual. Pretende hacer una analogía entre el concepto de causa predominante en la época y el tipo de tratamiento utilizado. Los griegos antiguos tenían la diosa Artemisa como sanadora de la rabia y ya utilizaban la cauterización de la herida. Los pueblos del siglo I conocían la capacidad infecciosa en la saliva de perros rabiosos, llamando a ese material de vene...

  10. BIOACTIVIDAD DE ACEITES ESENCIALES DE Minthostachys mollis CONTRA MOSQUITOS

    OpenAIRE

    Gleiser, Raquel M.; María A. Bonino; Zygadlo, Julio A.

    2007-01-01

    El control químico de vectores es una herramienta principal de prevención de enfermedades transmitidas por mosquitos. Los aceites esenciales (AE) de plantas pueden ser una alternativa a los compuestos sintéticos. Se extrajeron por arrastre con vapor AE de Minthostachys mollis y se evaluó su actividad insecticida contra larvas, pupas y adultos de mosquitos, según protocolos estándar de la Organización Mundial de la Salud. Se evaluaron concentraciones entre 10 y 160 ppm del AE y se registró la ...

  11. Potential Mechanisms for IgG4 Inhibition of Immediate Hypersensitivity Reactions.

    Science.gov (United States)

    James, Louisa K; Till, Stephen J

    2016-03-01

    IgG4 is the least abundant IgG subclass in human serum, representing less than 5 % of all IgG. Increases in IgG4 occur following chronic exposure to antigen and are generally associated with states of immune tolerance. In line with this, IgG4 is regarded as an anti-inflammatory antibody with a limited ability to elicit effective immune responses. Furthermore, IgG4 attenuates allergic responses by inhibiting the activity of IgE. The mechanism by which IgG4 inhibits IgE-mediated hypersensitivity has been investigated using a variety of model systems leading to two proposed mechanisms. First by sequestering antigen, IgG4 can function as a blocking antibody, preventing cross-linking of receptor bound IgE. Second IgG4 has been proposed to co-stimulate the inhibitory IgG receptor FcγRIIb, which can negatively regulate FcεRI signaling and in turn inhibit effector cell activation. Recent advances in our understanding of the structural features of human IgG4 have shed light on the unique functional and immunologic properties of IgG4. The aim of this review is to evaluate our current understanding of IgG4 biology and reassess the mechanisms by which IgG4 functions to inhibit IgE-mediated allergic responses. PMID:26892721

  12. UltramicroELISA indirecto para la deteccion de anticuerpos totales a citomegalovirus en suero humano Indirect Ultramicroelisa assay for the detection of human antibodies to cytomegalovirus using human serum samples

    OpenAIRE

    Jose Laferte; Miguel Marrero; Maritza Alvarez; Liliana Jomarron; Serafina Garcia; Susana Vazquez; Luis Morier; Mario Ulacia; Antonio Melchor

    1992-01-01

    Se normalizó un ultramicroELISA indirecto para la detección de anticuerpos a Citomegalovirus (CMV) humano (UMELISA CMV). Se determinó la concentración óptima de antígeno en 30 ug/ml, la dilución de los sueros fue de 1:40 y la dilución de trabajo del conjugado fue de 1:1500. El UMELISA CMV fue comparado con las técnicas de aglutinación de latex para anticuerpos anti-CMV (Dupont de Neumors) y la inmunofluorescencia indirecta (EFT). Los resultados mostraron un alto grado de concordancia y elevad...

  13. Overview of IgG4-Related Tubulointerstitial Nephritis and Its Mimickers

    OpenAIRE

    Jeong, Hyeon Joo; Shin, Su-Jin; Lim, Beom Jin

    2015-01-01

    Tubulointerstitial nephritis (TIN) is the most common form of renal involvement in IgG4-related disease. It is characterized by a dominant infiltrate of IgG4-positive plasma cells in the interstitium and storiform fibrosis. Demonstration of IgG4-positive plasma cells is essential for diagnosis, but the number of IgG4-positive cells and the ratio of IgG4-positive/IgG-positive plasma cells may vary from case to case and depending on the methods of tissue sampling even in the same case. IgG4-pos...

  14. Development of IgG4-related disease in a patient diagnosed with idiopathic membranous nephropathy

    OpenAIRE

    Wada, Yoko; Saeki, Takako; Yoshita, Kazuhiro; Ayalon, Rivka; Kamimura, Kenya; Nakano, Masaaki; Narita, Ichiei

    2013-01-01

    We report a case of IgG4-related disease (IgG4-RD) diagnosed after 3 years of follow-up for idiopathic membranous nephropathy (MN). MN has been considered as glomerular lesion of IgG4-related kidney diseases in recent years and was diagnosed simultaneously with or after a diagnosis of IgG4-RD in previously reported cases. In the present case, IgG4-RD developed 3 years after the diagnosis of idiopathic MN, indicating a possible relationship between idiopathic MN and IgG4-RD through common unde...

  15. Ocular adnexal marginal zone B cell lymphoma infiltrated by IgG4-positive plasma cells

    OpenAIRE

    KUBOTA, TOSHINOBU; Moritani, Suzuko; Yoshino, Tadashi; Nagai, Hirokazu; Terasaki, Hiroko

    2010-01-01

    Aims To report the clinicopathological characteristics of patients with ocular adnexal marginal zone B cell lymphoma (MZBL) with IgG4-positive plasma cells. Methods 114 biopsy samples of ocular adnexal MZBLs were analysed. MZBLs with IgG4-positive plasma cells were included when the IgG4:IgG ratio was >40% (IgG4-related group). The serum levels of each subclass of immunoglobulins and soluble interleukin-2 receptor in the IgG4-related group were compared with those in 61 consecutive patients h...

  16. Dermatopathic Lymphadenopathy With Increased IgG4-Positive Plasma Cells

    OpenAIRE

    Nakayama, Shoko; Yokote, Taiji; Akioka, Toshikazu; Miyoshi, Takuji; Hirata, Yuji; Hiraoka, Nobuya; Iwaki, Kazuki; Takayama, Ayami; Nishiwaki, Uta; Masuda, Yuki; Hanafusa, Toshiaki; Nishimura, Yasuichiro; Tsuji, Motomu

    2015-01-01

    Abstract Both dermatopathic lymphadenopathy (DL) and immunoglobulin G4-related disease (IgG4-RD) are frequently complicated with allergic diseases. However, the relationship between DL and IgG4-RD is not well known. To clarify this relationship on the basis of clinical and pathological findings, including IgG4-positive (IgG4+) plasma cell infiltration in lymph nodes (LNs) of DL patients, we analyzed LNs of 11 DL patients using immunostaining of IgG, IgG4, forkhead box P3 (FOXP3), transforming...

  17. Asociación entre anticuerpos antifosfolípidos y complicaciones de la gestación en mujeres de Costa Rica

    Directory of Open Access Journals (Sweden)

    Roubier Rojas-Barahona

    2007-04-01

    Full Text Available Objetivo: Determinar asociación entre los anticuerpos antifosfolípidos y complicaciones de la gestación (aborto de cualquier tipo, preeclampsia, eclampsia, insuficiencia placentaria grave o parto antes de la semana 34 de gestación, tomando como base la población de pacientes del servicio de Obstetricia del Hospital México. Materiales y métodos: Estudio de casos y controles en la población de pacientes atendidas por el servicio de Obstetricia del Hospital México en el período comprendido entre enero de 2002 y diciembre de 2004. Se tomaron los datos del registro de egresos Hospitalarios, se hizo un análisis descriptivo, en análisis univariado y multivariado de las principales variables registradas. Resultados: El promedio de edad de las pacientes en los casos y los controles no mostró diferencia significativa. La provincia de San José reporta el mayor porcentaje de casos con un 39.9%, seguido por Heredia con un 26.8% y Alajuela con un 24.6%. En cuanto al número de gestaciones, se determinó que no influyen significativamente en relación con el aborto y otras complicaciones de la gestación. El análisis univariado y multivariado mantiene asociación entre los antecedentes clínicos de las gestaciones anteriores, además de los anticuerpos antifosfolípidos respecto al aborto y otras complicaciones de la gestación. Conclusión: Los anticuerpos antifosfolípidos deberían ser tomados en cuenta como parte del seguimiento del embarazo en pacientes con historia de abortos y complicaciones de la gestación en embarazos previos.Aim: To determine the association between antiphospholipid antibodies and pregnancy failures (abortion, preclampsia, eclampsia, placental insufficiency or delivery before the 34th week of gestation in Costa Rican women. Materials and Methods: The present is a case-control study, the participants belong to the Obstetrics Department of the Hospital Mexico. The period of the study was from January 2002 to December

  18. Auto-anticorpos anti-β2-glicoproteína I e síndrome metabólica Anticuerpos anti-β2-glicoproteína I y síndrome metabólico Anti-beta2-glycoprotein I autoantibodies and metabolic syndrome

    Directory of Open Access Journals (Sweden)

    Rodrigo B. Krás Borges

    2011-04-01

    Full Text Available FUNDAMENTO: A síndrome metabólica (SM é uma entidade pró-aterogênica. Autoanticorpos tais como β2-glicoproteína I (β2-gpI podem influenciar o aparecimento de ateromas. Estudos anteriores confirmaram uma associação entre anticorpos IgA anti-β2-gpI e isquemia cerebral, infarto do miocárdio, doença arterial periférica e doença da carótida. OBJETIVO: O objetivo desse estudo de caso-controle foi avaliar uma possível associação entre anticorpos anti-β2-gpI e anticardiolipina (aCL com SM não-complicada. MÉTODOS: Pacientes com SM sem histórico de eventos vasculares e indivíduos-controle, consistindo em pacientes da Enfermaria de Ortopedia admitidos devido a doenças musculoesqueléticas foram incluídos no estudo. Idade, sexo, etnia, histórico de hipertensão, tabagismo, hipercolesterolemia e diabetes mellitus foram avaliados como fatores de risco em ambos os grupos. Anticorpos IgG, IgM, e IgA anti-β2-gpI e aCL foram detectados através de imunoensaios enzimáticos. RESULTADOS: Um total de 68 pacientes com SM e 82 controles foram estudados. Os pacientes com SM tinham média de idade superior à dos controles (P = 0,001, enquanto homens (P = 0,003; OR 0,31; IC95%: 0,15-0,16 e etnia caucasiana (P = 0,004; OR 0,25; IC95%:0,10-0,60 eram predominantes nos controles. Histórico de hipertensão, hipercolesterolemia e diabetes mellitus foi mais prevalente nos pacientes com SM do que nos controles (P FUNDAMENTO: El síndrome metabólico (SM es una entidad pro-aterogénica. Autoanticuerpos tales como β2-glicoproteína I (β2-GPI pueden influir en la aparición de ateromas. Estudios previos han confirmado una asociación entre anticuerpos IgA anti-β2-GPI y la isquemia cerebral, infarto de miocardio, enfermedad arterial periférica y enfermedad carotidea. OBJETIVO: El objetivo de este estudio de caso-control fue evaluar una posible asociación entre los anticuerpos anti-β2-GPI y anticardiolipina (aCL con SM complicada. MÉTODOS: Se

  19. Comparison of semi-automatized assays for anti-T. gondii IgG detection in low-reactivity serum samples: importance of the results in patient counseling Comparação de ensaios semi-automatizados para pesquisa de IgG anti-T. gondii em amostras de soros de baixa reatividade: importância dos resultados no aconselhamento do paciente

    Directory of Open Access Journals (Sweden)

    Paulo Guilherme Leser

    2003-06-01

    Full Text Available Toxoplasmosis is a disease which can cause severe congenital infection and is normally diagnosed by the detection of T. gondii specific antibodies in the serum of infected patients. Several different tests allow to distinguish recent from past infections and to quantify anti-T. gondii specific IgG, and the results can be used as markers for immunity. In the present study, we compare the performance of two different methodologies, the Elfa (bioMérieux S.A and the Meia (Abbott Laboratories in detecting T. gondii specific IgG in low-reactivity sera. Of 76 analyzed samples, three presented discrepant results, being positive in the Abbott AxSYM Toxo IgG assay, and negative in the bioMérieux Vidas Toxo IgG II assay. By using other tests, the three sera were confirmed to be negative. The results are discussed in the context of their importance for patient management, especially during pregnancy.Toxoplasmose, doença conhecida por sua severidade na infecção congênita é geralmente diagnosticada pela demonstração de anticorpos específicos contra antígenos de T. gondii, presentes no soro de indivíduos infectados. Diferentes testes são disponíveis para diferenciar infecção recente de infecção pregressa, para quantificar anticorpos IgG anti-T. gondii nos soros dos pacientes e utilizar os resultados como marcadores de imunidade. Neste trabalho apresentamos os resultados do estudo comparativo de duas tecnologias, Elfa (bioMérieux S.A. e Meia (Abbott Laboratories, para pesquisa de anticorpos IgG anti-T. gondii em amostras de soros de baixa reatividade. De 76 amostras processadas, três apresentaram resultados discrepantes, reagentes para AxSYM Toxo IgG e não-reagentes para Vidas Toxo IgG II. A confirmação dos resultados, feita por bateria de testes, mostrou que todas as três amostras eram não-reagentes. Os resultados são discutidos em sua importância e orientação clínica, principalmente para a paciente gestante.

  20. Contra spem spero : [luuletused] / Lesja Ukrainka ; tlk. Harald Rajamets

    Index Scriptorium Estoniae

    Ukrainka, Lesja

    2004-01-01

    Sisu: Contra spem spero ; Krimmi mälestusi : Merevaikus : Maruilm : Bahţisarai palee ; Purunenud viinaklaas ; Aoeelsed tuled ; Meloodiad ; Igaveseks mälestuseks kirjakesele, mille sõbrakäsi ohupäevil ära põletas ; "Kui ma lapsepõlves vahel..." ; Romanss ; Ukraina kirjanduse saja aasta juubeliks ; Unustatud vari ; "Välud, veel laiguti sulava lumega..." ; "Alati oksakroon peas..." ; "Oi ma käin kesk kuivi kuuski, mu süda on valus..." ; "Oi ei kadund kuldsed okaspõõsad..." ; "Kord püha hermandaadi ajal juhtus..." ; Lõbus härra ; Praktiline härra ; Laine ; Reisiraamatust : Pontos Axeinos : Udus

  1. Performance of the contra-rotating Wells turbine

    Energy Technology Data Exchange (ETDEWEB)

    Gato, L.M.C. [Univ. Tecnica de Lisboa, Lisbon (Portugal). Inst. Superior Tecnico; Curran, R. [Queen`s Univ., Belfast (United Kingdom). Dept. of Aeronautical Engineering

    1995-12-31

    The paper describes experimental investigation of the contra-rotating Well`s turbine for a wave power plant. The tests were conducted in unidirectional steady air flow rig. Measurements taken included the overall performance of the turbine as well as detailed measurements of the radial distribution of velocity and pressure, upstream, downstream and between the rotor planes, for two different solidity turbine models and different rotor speed ratios. Experimental results show that the use of two twin rotors rotating in the opposite direction to each other is an efficient means of recovering the swirl kinetic energy without the use of guide vanes. Also, it was shown that the stall could be postponed by increasing the velocity of the downstream rotor relative to that of the upstream rotor.

  2. Violencia contra sindicalistas en medio del conflicto armado colombiano

    Directory of Open Access Journals (Sweden)

    Camilo Echandía Castilla

    2013-12-01

    Full Text Available El estudio de la violencia contra sindicalistas en medio del conflicto armado colombiano pone al descubierto el carácter selectivo y sistemático de una violencia deliberada que busca debilitar, neutralizar, desarticular o cooptar a las organizaciones sociales, reducir su capacidad de presión y acallar sus reivindicaciones. Los homicidios de sindicalistas se han reducido en los últimos años debido a la desmovilización de parte del componente de las autodefensas y al repliegue de las guerrillas, y a su salida de zonas que disputaban con los paramilitares. Las bandas criminales también asesinan sindicalistas, pero en menor número.

  3. CAMPAÑA CONTRA LA DESNUTRICIÓN INFANTIL

    OpenAIRE

    Alex Duque Yépez; Ítalo Martillo Pazmiño

    2014-01-01

    Este proyecto tiene como nombre Campaña Contra La Desnutrición Infantil, la finalidad de erradicar la desnutrición en los niños porque según las estadísticas de la Encuesta de Condiciones de Vida (CV), del Instituto Nacional de Estadística y Censo (INEC), la desnutrición crónica en el país afecta al 26% de los niños. Se desea que a través de esta campaña se cumpla con los objetivos propuestos como los de crear conciencia de lo importante que es la buena alimentación en los niños ya que ellos ...

  4. Niveles de protección contra la hemaglutinina del virus de influenza A/Johannesburg/82/96(H1N1 en un hogar de ancianas

    Directory of Open Access Journals (Sweden)

    Suset Oropesa

    2010-12-01

    Full Text Available La vacunación anual contra la influenza es una acción estratégica fundamental para reducir la morbilidad, la mortalidad y las complicaciones ocasionadas por esta enfermedad. Su aplicación se recomienda en los grupos de riesgo, sobre todo en los ancianos con peligro de desarrollar una influenza severa o complicada. Atendiendo a esta condición se evaluó, después de aplicar una dosis única (0,5 mL por vía intramuscular de la vacuna Agrippal S1/Chiron, recomendada por la OMS para la temporada 1997-1998, la respuesta inmune humoral antihemaglutinina en 38 mujeres con una edad ³ a 65 años, todas pertenecientes a un hogar de ancianas (institución estatal de La Habana, Cuba. Para ello se utilizó la técnica de inhibición de la hemaglutinación en muestras de suero, obtenidas a partir de la sangre extraída en tres etapas: prevacunación (inmediatamente antes de su aplicación, posvacunación (30 días después y un año después de la inmunización durante la temporada de influenza 1997-1998. Al aplicar el test de Student en los resultados obtenidos se observó que al comparar los niveles de anticuerpos protectores detectados en la etapa posvacunal (78,94% y al año de la inmunización (42,11%, con los identificados en la etapa prevacunal, existían diferencias estadísticamente significativas (p=0,0094 y p=0,0018, respectivamente. La comparación de los porcentajes de positividad detectados en las tres etapas investigadas (28,94%; 97,36% y 86,84% fue también significativo mediante el test de Chi cuadrado (p<0,00001. La respuesta a la inmunización antigripal obtenida en este grupo de riesgo apoya la política de revacunación en los ancianos, individuos donde se observan las mayores tasas de mortalidad por influenza y neumonía.

  5. Performance and Internal Flow of Sirocco Fan Using Contra-Rotating Rotors

    Institute of Scientific and Technical Information of China (English)

    J. Fukutomi; T.Shigemitsu; T. Yasunobu

    2008-01-01

    A sirocco fan using contra-rotating rotors in which an inner rotor is settled inside the sirocco fan rotor end each rotor rotates in an opposite direction was proposed for the purpose of getting the higher pressure and making the structure of a sirocco fan more compact. If the high discharge pressure is obtained with the adoption of the contra-rotating rotors, it could be used for various purposes. Pressure coefficient of a sirocco fan with contra-rotating rotors is 2.5 times as high as the conventional sirocco fan and the maximum efficiency point of contra-rotating rotors shifts to larger flow rate than a conventional sirocco fan. On the other hand, it was clarified from the flow measurement results that circumferential velocity component at the outlet of the outer rotor of contra-rotating rotors becomes larger than a conventional one. In the present paper, the performance of a conventional sirocco fan and a sirocco fan with contra-rotating rotors are shown and the internal flow field at the outlet of outer rotor of both cases is clarified. Then, the effect of different kind of contra-rotating rotors on the performance and internal flow field is investigated and the rotor design with higher performanco would be discussed.

  6. Tratamiento contra la rabia humana: un poco de su historia

    Directory of Open Access Journals (Sweden)

    Schneider Maria Cristina

    1994-01-01

    Full Text Available El presente trabajo es una revisión histórica del tratamiento utilizado contra la rabia humana, desde la antigüedad hasta el momento actual. Pretende hacer una analogía entre el concepto de causa predominante en la época y el tipo de tratamiento utilizado. Los griegos antiguos tenían la diosa Artemisa como sanadora de la rabia y ya utilizaban la cauterización de la herida. Los pueblos del siglo I conocían la capacidad infecciosa en la saliva de perros rabiosos, llamando a ese material de veneno virus (en latín. En la Edad Media, cuando prevalecía un concepto mágico y religioso de la salud, el gran protector era San Humberto. Con el Renacimiento surgen nuevamente muchos experimentos y avances en el conocimiento de la enfermedad, que sentaron las bases para los importantes hallazgos en el futuro próximo. En esa época predominaba la teoría miasmática y del contagio. Pasteur fue un grande opositor de la espontaneidad de la rabia. A finales del siglo XIX, con los descubrimientos microbianos, Pasteur hizo la gran revolución científica en relación al tratamiento contra la rabia, que es la vacuna. Las vacunas pueden actualmente ser de tipo nervioso o no, variando también el numero de dosis recomendadas. Se han desarrollado muchos estudios sobre vacunas, siendo la más utilizada en América Latina del tipo Fuenzalida y Palacios, y la recomendada actualmente por la OMS es la de cultivo celular.

  7. Tratamiento contra la rabia humana: un poco de su historia

    Directory of Open Access Journals (Sweden)

    Maria Cristina Schneider

    1994-12-01

    Full Text Available El presente trabajo es una revisión histórica del tratamiento utilizado contra la rabia humana, desde la antigüedad hasta el momento actual. Pretende hacer una analogía entre el concepto de causa predominante en la época y el tipo de tratamiento utilizado. Los griegos antiguos tenían la diosa Artemisa como sanadora de la rabia y ya utilizaban la cauterización de la herida. Los pueblos del siglo I conocían la capacidad infecciosa en la saliva de perros rabiosos, llamando a ese material de veneno virus (en latín. En la Edad Media, cuando prevalecía un concepto mágico y religioso de la salud, el gran protector era San Humberto. Con el Renacimiento surgen nuevamente muchos experimentos y avances en el conocimiento de la enfermedad, que sentaron las bases para los importantes hallazgos en el futuro próximo. En esa época predominaba la teoría miasmática y del contagio. Pasteur fue un grande opositor de la espontaneidad de la rabia. A finales del siglo XIX, con los descubrimientos microbianos, Pasteur hizo la gran revolución científica en relación al tratamiento contra la rabia, que es la vacuna. Las vacunas pueden actualmente ser de tipo nervioso o no, variando también el numero de dosis recomendadas. Se han desarrollado muchos estudios sobre vacunas, siendo la más utilizada en América Latina del tipo Fuenzalida y Palacios, y la recomendada actualmente por la OMS es la de cultivo celular.

  8. Bilateral Vision Loss Secondary to Pachymeningitis in a Patient with IgG4-Related Disease

    OpenAIRE

    Ramirez, Lucas; D’Auria, Andrea; Popalzai, Adeel; Sanossian, Nerses

    2014-01-01

    IgG4-related disease (IgG4-RD) is a recently recognized fibroinflammatory condition associated with disease in nearly every organ, including the meninges. A proportion of idiopathic hypertrophic pachymeningitis cases may involve a component of meningeal IgG4-RD. We present a patient with severe bilateral vision loss found to have thickening of the dura mater on MRI, and subsequently diagnosed with IgG4-RD after dural biopsy.

  9. Membranous nephropathy as a rare renal manifestation of IgG4-related disease

    OpenAIRE

    Kurien, A. A.; RayChaudhury, A; Walker, P D

    2015-01-01

    IgG4-related disease, a newly described immune-mediated disorder with tissue infiltration of IgG4-positive plasma cells, has been reported in nearly every organ. In the kidney, it manifests as IgG4-related tubulointerstitial nephritis (TIN) but may also present as membranous nephropathy. We report a patient with IgG4 renal disease who had membranous nephropathy as well as TIN.

  10. IgG4-related chronic rhinosinusitis: A new clinical entity of nasal disease

    OpenAIRE

    Moteki, Hideaki; Yasuo, Masanori; Hamano, Hideaki; Uehara, Takeshi; Usami, Shin-Ichi

    2010-01-01

    Conclusion IgG4-related disease involves nasal manifestations with chronic rhinosinusitis (CRS). This type of sinusitis is a new clinical entity of nasal disease associated with a high level of serum IgG4 for which steroid therapy is effective. Objectives. To confirm whether IgG4-related disease has distinctive chronic rhinosinusitis. Methods: We compared serum IgG4 levels as well as nasal computed tomography (CT) and clinicopathological findings before and after glucocorticoid treatment in 3...

  11. Recurrent Mastoiditis Mimics IgG4 Related Disease: A Potential Diagnostic Pitfall.

    Science.gov (United States)

    Deshpande, Vikram; Zane, Nicolas A; Kraft, Stefan; Stone, John H; Faquin, William C

    2016-09-01

    IgG4-related disease (IgG4-RD) is a recently recognized entity that causes progressive fibrosis and formation of mass lesions. IgG4-RD can be diagnosed histologically by its hallmarks of storiform fibrosis, prominent lymphoplasmacytic infiltrate, and obliterative phlebitis, accompanied by the infiltration of excessive numbers of IgG4-positive plasma cells as well as elevations in serum IgG4 concentrations. A recent publication reported a case of IgG4-RD in the mastoid sinus, representing a new anatomic location for this disease. We report two additional cases of IgG4-RD occurring in the mastoid and causing clinical mastoiditis. The presenting symptoms were varied-tinnitus, hearing loss, and cranial nerve palsies. All three cases showed a dense lymphoplasmacytic infiltrate, storiform type fibrosis as well as elevated numbers of IgG4 positive plasma cells. The three patients responded to immunosuppressive therapy that included steroids and Rituximab. We further investigated 162 consecutive mastoiditis cases at our institution in order to determine the frequency of IgG4-RD as a previously unrecognized cause of mastoiditis. Within this latter cohort we identified nine cases of mastoiditis that had two of the histologic features of IgG4-RD, specifically storiform fibrosis and a dense lymphoplasmacytic infiltrate. Two of these cases showed >50 IgG4-positive plasma cells per high-power field with IgG4-IgG ratio of >40 %, thus fulfilling histological criteria for IgG4-RD. However, both were due to severe acute or chronic infection. In conclusion, we reaffirm IgG4 related mastoiditis as a distinct but uncommon cause of recurrent mastoiditis. The diagnosis of IgG4-related mastoiditis should be rendered with caution, and only after the exclusion of potential mimickers, particularly infection. PMID:27091207

  12. IgG4-related tubulointerstitial nephritis associated with only lymphadenopathy and without elevated serum IgG4 or renal imaging abnormalities: a case report and literature review

    OpenAIRE

    Qiao, Xi; Wang, Lihua; Wang, Chen; Gao, Lifang; Yao, Shulei; Wu, Liran; Zhang, Xiaoqin

    2015-01-01

    IgG4-related tubulointerstitial nephritis (IgG4-TIN) is the most common renal manifestation of IgG4-related kidney disease (IgG4-RKD) and may cause acute or chronic renal dysfunction. Imaging often shows heterogeneous densities in the kidneys, such as a mass or multiple nodules. Serology usually demonstrates high levels of serum IgG4 and total IgG. Most patients have other organs involvement by IgG4 related disease. Although lymphadenopathy is frequently observed in patients with IgG4-TIN, it...

  13. Polyclonal hyperviscosity syndrome in IgG4-related disease and associated conditions

    OpenAIRE

    Chen, Luke YC; Wong, Patrick CW; Noda, Shinji; Collins, David R.; Sreenivasan, Gayatri M; Coupland, Robert C

    2015-01-01

    Key Clinical Message Polyclonal hyperviscosity syndrome (HVS) is rare and has been reported in various disorders of immune dysregulation and lymphoid hyperplasia. IgG4-Related Disease (IgG4-RD) is an emerging disorder often associated with exuberant hypergammaglobulinemia, and this review of seven cases establishes IgG4-RD as an important cause of polyclonal HVS.

  14. Molecular recognition of antibody (IgG) by cellular Fc receptor (FcRI).

    Science.gov (United States)

    Burton, D R; Jefferis, R; Partridge, L J; Woof, J M

    1988-11-01

    Earlier studies from this and other laboratories have provided indirect evidence for the involvement of the C gamma 2 domain of human IgG in the binding of IgG to the high affinity monocyte Fc receptor (FcRI). Two approaches have been used to extend these studies and to further localize the site of interaction on human IgG. Firstly, monoclonal antibodies (MAbs) directed against different epitopes on IgG were assayed for their capacity to inhibit the binding of radiolabelled IgG to human monocytes or U937 cells. The capacity of the MAbs to interact with their respective epitopes on FcR-bound IgG was also studied using indirect radiobinding and immunofluorescence assays. Secondly, a number of IgGs from several different species and fragments of human IgGs were assayed for their ability to inhibit the binding of radiolabelled IgG to human monocytes. The amino acid sequences of those IgGs exhibiting relatively tight, intermediate or weak binding to monocyte FcRs were compared. On the basis of these studies a possible monocyte FcR-binding site on human IgG is postulated, involving the lower hinge region of IgG (residues Leu 234-Ser 239) with possible involvement of the nearby N-proximal bend and two beta-strands (Gly 316-Lys 338). PMID:2975762

  15. Guerra civil y violencia de la guerra civil contra las organizaciones sociales en Barrancabermeja: 1996 - 2003

    OpenAIRE

    Andrés Ricardo Vargas

    2008-01-01

    La violencia de la guerra civil contra grupos poblacionales específicos no étnicos ha sido un tema que han pasado por alto las numerosas investigaciones que en el pasado reciente han estudiado la guerra civil y la violencia asociada a ésta. Este documento expone los resultados de un estudio de caso sobre la violencia de la guerra civil contra las organizaciones sociales en Barrancabermeja entre 1996 y 2003. El estudio se funda sobre la idea de que la violencia contra las organizaciones social...

  16. Genetic and infectious profiles influence cerebrospinal fluid IgG abnormality in Japanese multiple sclerosis patients.

    Directory of Open Access Journals (Sweden)

    Satoshi Yoshimura

    Full Text Available BACKGROUND: Abnormal intrathecal synthesis of IgG, reflected by cerebrospinal fluid (CSF oligoclonal IgG bands (OBs and increased IgG index, is much less frequently observed in Japanese multiple sclerosis (MS cohorts compared with Western cohorts. We aimed to clarify whether genetic and common infectious backgrounds influence CSF IgG abnormality in Japanese MS patients. METHODOLOGY: We analyzed HLA-DRB1 alleles, and IgG antibodies against Chlamydia pneumoniae, Helicobacter pylori, Epstein-Barr virus nuclear antigen (EBNA, and varicella zoster virus (VZV in 94 patients with MS and 367 unrelated healthy controls (HCs. We defined CSF IgG abnormality as the presence of CSF OBs and/or increased IgG index (>0.658. PRINCIPAL FINDINGS: CSF IgG abnormality was found in 59 of 94 (62.8% MS patients. CSF IgG abnormality-positive patients had a significantly higher frequency of brain MRI lesions meeting the Barkhof criteria compared with abnormality-negative patients. Compared with HCs, CSF IgG abnormality-positive MS patients showed a significantly higher frequency of DRB1 1501, whereas CSF IgG abnormality-negative patients had a significantly higher frequency of DRB1 0405. CSF IgG abnormality-positive MS patients had a significantly higher frequency of anti-C. pneumoniae IgG antibodies compared with CSF IgG abnormality-negative MS patients, although there was no difference in the frequency of anti-C. pneumoniae IgG antibodies between HCs and total MS patients. Compared with HCs, anti-H. pylori IgG antibodies were detected significantly less frequently in the total MS patients, especially in CSF IgG abnormality-negative MS patients. The frequencies of antibodies against EBNA and VZV did not differ significantly among the groups. CONCLUSIONS: CSF IgG abnormality is associated with Western MS-like brain MRI features. DRB1 1501 and C. pneumoniae infection confer CSF IgG abnormality, while DRB1 0405 and H. pylori infection are positively and negatively

  17. Performance Evaluation of the VIDAS(®) Measles IgG Assay and Its Diagnostic Value for Measuring IgG Antibody Avidity in Measles Virus Infection.

    Science.gov (United States)

    Dina, Julia; Creveuil, Christian; Gouarin, Stephanie; Viron, Florent; Hebert, Amelie; Freymuth, Francois; Vabret, Astrid

    2016-01-01

    The objective of this study is primarily to compare the performance of the VIDAS(®) Measles immunoglobulin (Ig)G assay to that of two other serological assays using an immunoassay technique, Enzygnost(®) Anti-measles Virus/IgG (Siemens) and Measles IgG CAPTURE EIA(®) (Microimmune). The sensitivity and the agreement of the VIDAS(®) Measles IgG assay compared to the Enzygnost(®) Anti-measles Virus/IgG assay and the Measles IgG CAPTURE EIA(®) assay are 100%, 97.2% and 99.0%, 98.4%, respectively. The very low number of negative sera for IgG antibodies does not allow calculation of specificity. As a secondary objective, we have evaluated the ability of the VIDAS(®) Measles IgG assay to measure anti-measles virus IgG antibody avidity with the help of the VIDAS(®) CMV IgG Avidity reagent, using 76 sera from subjects with measles and 238 other sera. Different groups of populations were analyzed. In the primary infection measles group, the mean IgG avidity index was 0.16 (range of 0.07 to 0.93) compared to 0.79 (range of 0.25 to 1) in the serum group positive for IgG antibodies and negative for IgM. These data allow to define a weak anti-measles virus IgG antibody avidity as an avidity index (AI) AI > 0.6. The VIDAS(®) Measles IgG assay has a performance equivalent to that of other available products. Its use, individual and quick, is well adapted to testing for anti-measles immunity in exposed subjects. PMID:27556477

  18. Performance Evaluation of the VIDAS® Measles IgG Assay and Its Diagnostic Value for Measuring IgG Antibody Avidity in Measles Virus Infection

    Science.gov (United States)

    Dina, Julia; Creveuil, Christian; Gouarin, Stephanie; Viron, Florent; Hebert, Amelie; Freymuth, Francois; Vabret, Astrid

    2016-01-01

    The objective of this study is primarily to compare the performance of the VIDAS® Measles immunoglobulin (Ig)G assay to that of two other serological assays using an immunoassay technique, Enzygnost® Anti-measles Virus/IgG (Siemens) and Measles IgG CAPTURE EIA® (Microimmune). The sensitivity and the agreement of the VIDAS® Measles IgG assay compared to the Enzygnost® Anti-measles Virus/IgG assay and the Measles IgG CAPTURE EIA® assay are 100%, 97.2% and 99.0%, 98.4%, respectively. The very low number of negative sera for IgG antibodies does not allow calculation of specificity. As a secondary objective, we have evaluated the ability of the VIDAS® Measles IgG assay to measure anti-measles virus IgG antibody avidity with the help of the VIDAS® CMV IgG Avidity reagent, using 76 sera from subjects with measles and 238 other sera. Different groups of populations were analyzed. In the primary infection measles group, the mean IgG avidity index was 0.16 (range of 0.07 to 0.93) compared to 0.79 (range of 0.25 to 1) in the serum group positive for IgG antibodies and negative for IgM. These data allow to define a weak anti-measles virus IgG antibody avidity as an avidity index (AI) AI > 0.6. The VIDAS® Measles IgG assay has a performance equivalent to that of other available products. Its use, individual and quick, is well adapted to testing for anti-measles immunity in exposed subjects. PMID:27556477

  19. Autoradiographic detection of IgG and viral antigens

    International Nuclear Information System (INIS)

    Autoradiographic methods can be used as an alternative to indirect immunofluorescence to detect viral antigen expression or the presence of IgG in tissue sections. Iodinated protein A isolated from Staphylococcus aureus detects an influx of IgG into the central nervous system of mice inoculated with the coronavirus SD. Antispecies antibody that has been iodinated detects coronavirus antigen expression for 24 days post-inoculation while it is only detectable for 10 days by immunofluorescence. A direct comparison of indirect fluorescence and autoradiographic methods indicates that the autoradiographic techniques are considerably more sensitive. This increased sensitivity is sufficient to permit the detection of viral antigen in formalin fixed paraffin embedded tissue sections. (Auth.)

  20. Serological IgG avidity test for ocular toxoplasmosis

    Directory of Open Access Journals (Sweden)

    Suresh S

    2012-01-01

    Full Text Available Subramaniam Suresh1, Saidin Nor-Masniwati1, Muhd Nor Nor-Idahriani1, Wan-Hitam Wan-Hazabbah1, Mohamed Zeehaida2, Embong Zunaina11Department of Ophthalmology, 2Department of Medical Microbiology and Parasitology, School of Medical Sciences, Universiti Sains Malaysia, Kelantan, MalaysiaBackground: The purpose of this study was to evaluate the immunoglobulin (Ig G avidity of serological toxoplasmosis testing in patients with ocular inflammation and to determine the clinical manifestations of ocular toxoplasmosis.Methods: A retrospective review of all patients presenting with ocular inflammation to the Hospital Universiti Sains Malaysia, Kelantan, Malaysia between 2005 and 2009 was undertaken. Visual acuity, clinical manifestations at presentation, toxoplasmosis antibody testing, and treatment records were analyzed.Results: A total of 130 patients with ocular inflammation were reviewed retrospectively. The patients had a mean age of 38.41 (standard deviation 19.24, range 6–83 years. Seventy-one patients (54.6% were found to be seropositive, of whom five (3.8% were both IgG and IgM positive (suggestive of recently acquired ocular toxoplasmosis while one (0.8% showed IgG avidity ≤40% (suggestive of recently acquired ocular toxoplasmosis and 65 patients (50.0% showed IgG avidity >40% (suggestive of reactivation of toxoplasmosis infection. Chorioretinal scarring as an ocular manifestation was significantly more common in patients with seropositive toxoplasmosis (P = 0.036. Eighteen patients (13.8% were diagnosed as having recent and/or active ocular toxoplasmosis based on clinical manifestations and serological testing.Conclusion: Ocular toxoplasmosis is a clinical diagnosis, but specific toxoplasmosis antibody testing helps to support the diagnosis and to differentiate between reactivation of infection and recently acquired ocular toxoplasmosis.Keywords: ocular toxoplasmosis, chorioretinal scar, toxoplasmosis antibody, IgG avidity test

  1. Association between IgG4 Autoantibody and Complement Abnormalities in Systemic Lupus Erythematosus.

    Science.gov (United States)

    Pan, Qingjun; Guo, Linjie; Wu, Jing; Cai, Jun; Liao, Huanjin; Lan, Qiaofen; Peng, Yanxia; He, Yiming; Liu, Hua-Feng

    2016-01-01

    In order to investigate the association between IgG4 autoantibody and complement abnormalities in systemic lupus erythematosus (SLE), 72 newly diagnosed SLE patients, 67 rheumatoid arthritis (RA) patients, and 41 healthy normals were employed. Serum levels of antinuclear IgG4 and IgG4-specific IgM-rheumatoid factor (RF) were measured, and the correlations between serum levels of antinuclear IgG4 and several clinical parameters were analyzed. Also, the levels of IgG subclasses, C1q, and C3 deposition in lupus nephritis (LN) were detected. The results showed that serum levels of antinuclear IgG4 were higher in SLE patients relative to healthy normals (P < 0.01). Serum levels of antinuclear IgG4 in SLE patients were positively correlated with serum levels of total IgG4, albumin, and C3 (r = 0.61, P < 0.05; r = 0.40, P < 0.05; and r = 0.54, P < 0.05, resp.) and negatively correlated with 24-hour urinary protein (r = 0.49, P < 0.05). Serum levels of IgG4-specific IgM-RF were higher in RA patients than in SLE patients (P < 0.001). Also, the ratio of the deposition score for IgG4/(IgG1 + IgG2 + IgG3 + IgG4) was negatively correlated with the score for C1q and C3 deposition in LN (r = 0.34, P < 0.05; r = 0.51, P < 0.01, resp.). In summary, the IgG4 autoantibody may dampen the inflammatory response in SLE, thus maybe providing a novel therapeutic target for SLE. PMID:27597802

  2. Recombinant Human IgG antibodies against Human Cytomegalovirus

    Institute of Scientific and Technical Information of China (English)

    TAO DUAN; XIAO-FANG WANG; SHU-YUAN XIAO; SHU-YAN GU; MI-FANG LIANG

    2008-01-01

    Objective To study the passive immunization with human monoclonal antibodies as for prophylaxis of human eytomegalovirus (HCMV) infection. Methods Fab monochinal antibodies to HCMV were recovered by repertoire cloning of mRNA from a HCMV infected individual. Antigen binding specificity, CDR sequence of Vhand Vland neutralizing activity on HCMV AD169 stain were analyzed in vitro. The light and heavy chain Fd fragment genes of Fab antibodies were further cloned into a recombinant baculovirus expression vector pAC-κ-Fc to express intact IgG. Secreted products were purified with affinity chromatography using protein G. Results SDS-PAGE and Western blot confirmed the expression of the intact IgG. Immuno-blotting and -precipitation were used to identify HCMV proteins. One Fab monoclonal antibodyrecognized a conformational HCMV protein. Conclusion IgG antibodies can neutralize the HCMV AD169 strain efficiently at a titer of 2.5 μg/mL and may prove valuable for passive immunoprophylaxis against HCMV infection in humans.

  3. Granulocyte-associated IgG in neutropenic disorders

    International Nuclear Information System (INIS)

    We applied a radiolabeled antiglobulin test to a study of patients with a variety of neutropenic disorders. After defining the nature of the interaction of radiolabeled anti-IgG with the neutrophil, we studied 16 patients with neutropenia of uncertain etiology and adequate bone marrow granulocyte precursors. Twelve of these 16 patients had increased neutrophil-associated IgG (PMN-IgG). Patients with the highest levels of PMN-IgG had the lowest neutrophil counts. The majority of patients with neutropenia and increased PMN-IgG had an underlying immunologic disorder that included immune thrombocytopenic purpura in 5 patients and autoimmune hemolytic anemia in 1 patient. In some patients, elevated PMN-IgG preceded other evidence for immunologic disease. The direct antiglobulin test helped to distinguish neutropenic patients with increased PMN-IgG both from patients with neutropenia due to a known nonimmune disorder and from nonneutropenic patients with rheumatoid arthritis or systemic lupus erythematosis. Each of four patients with increased neutrophil-associated IgG treated with systemic corticosteroids responded clinically with an associated fall in neutrophil IgG and a rise in the circulating neutrophil count. The radiolabeled antiglobulin test appears useful in defining a subpopulation of patients with neutropenia due to an underlying immunologic disorder

  4. Quantitative analysis of the IgG and IgG subclass immune responses to chromosomal Pseudomonas aeruginosa beta-lactamase in serum from patients with cystic fibrosis by western blotting and laser scanning densitometry

    DEFF Research Database (Denmark)

    Petersen, T D; Ciofu, O; Pressler, T; Giwercman, B; Pedersen, S S; Høiby, N

    1996-01-01

    IgG1, 79% had IgG4, 56% IgG2, and only 16% of the patients had IgG3 a beta ab. The IgG1 and IgG4 a beta ab appeared first, and more than 50% of the patients were IgG1 and IgG4 a beta ab positive within 2-3 years of the onset of infection, but IgG2 positivity only appeared after seven years and IgG3...... remained absent from most of the patients. The median a beta ab levels increased during chronic infection: 100-fold for IgG1, 22-fold for IgG2, and 45-fold for IgG4. A 16-fold increase in the IgG3 a beta ab levels was detected in the six patients who developed IgG3 a beta ab. In the first four years of the...... chronic infection the a beta ab titres were higher in patients with good lung function than in those with poor lung function. CONCLUSIONS: The association of a weak IgG3 and a strong IgG4 a beta ab response suggests that the contribution of a beta ab antibodies to lung diseases mediated by immune...

  5. The Utility of Serum IgG4 Concentrations as a Biomarker

    OpenAIRE

    Takayuki Watanabe; Masahiro Maruyama; Hideaki Hamano; Masafumi Maruyama; Shigeyuki Kawa; Norikazu Arakura; Takashi Muraki; Tetsuya Ito

    2012-01-01

    IgG4-related disease is a new disease entity involving IgG4 in its clinical presentation and having 6 characteristic features: (1) systemic involvement; (2) solitary or multiple lesions showing diffuse or localized swelling, masses, nodules, and/or wall thickening on imaging; (3) high serum IgG4 concentration >135 mg/dL; (4) abundant infiltration of lymphoplasmacytes and IgG4-bearing plasma cells; (5) a positive response to corticosteroid therapy; and (6) complications of other IgG4-related d...

  6. A case of adenoid cystic carcinoma associated with IgG4-related disease

    OpenAIRE

    Tsuyoshi Shimo; Mayumi Yao; Yuichiro Takebe; Yuko Ono; Kyoichi Obata; Naito Kurio; Soichiro Ibaragi; Norie Yoshioka; Koji Kishimoto; Yoshinobu Yanagi; Hitoshi Nagatsuka; Akira Sasaki

    2015-01-01

    Introduction: Immunoglobulin G4-related disease (IgG4-RD) is an inflammatory condition associated with elevated serum IgG4 levels and tissue infiltration by IgG4-expressing plasma cells. We present a case of adenoid cystic carcinoma (ACC) of the submandibular gland with possible involvement of IgG4-RD. Presentation of case: The patient was a 59-year-old man presenting with a swollen right submandibular gland. Laboratory tests revealed IgG4 levels of 176 mg/dl (reference range: 4.8–105). An...

  7. Evaluation of diagnostic criteria for IgG4-related tubulointerstitial nephritis

    OpenAIRE

    Tang, Xuanli; Zhu, Bin; Chen, Riping; Hu, Yunqin; Zhang, Yinghua; Zhu, Xiaoling; Chen, Hongyu; Wang, Yongjun

    2015-01-01

    Background IgG4-TIN is the most common pattern of renal involvement in IgG4-related disease. There are several proposed diagnostic criteria of IgG4-TIN recently. Two of them proposed by the Mayo Clinic and JSN are predominant. However, histopathological criteria of the number of IgG4+ plasma cells and several histological features are still under discussion due to low amount of tissue in renal biopsy specimens and low frequency of this kind of specimens. We aimed to screen IgG4-TIN on archive...

  8. IgG4-related systemic disease mimicking renal pelvic cancer: a rare case

    OpenAIRE

    Wang, Yiwei; Chen, Xing; Luo, Rongkui; Wang, Hang; Wang, Guomin; Hou, Yingyong; Guo, Jianming

    2014-01-01

    Background Immunoglobulin G4–related disease (IgG4-RD) is a new clinical entity. Characteristic features of IgG4-RD are elevated serum IgG4 levels, infiltration of IgG4-positive cells, mass-forming lesions with fibrosis and good response to corticosteroids. The variable imaging features of IgG4-RD and the overlap with other differential diagnoses often pose a diagnostic challenge, as they frequently mimic malignant tumors or other inflammatory diseases in the abdomen. Case presentation A 54-y...

  9. Peccatum contra sextum Pärnu maakohtus 1740. aastatel / Mati Laur

    Index Scriptorium Estoniae

    Laur, Mati, 1955-

    2008-01-01

    Tervikuna ilmunud: Laur, Mati. Peccatum contra sextum vor dem Pernauer Landgericht in den 1740er Jahren // Forschungen zur baltischen Geschichte. 3/2008. Tartu, 2008, lk. 132-150. - (Humaniora: historica). - Bibl. joonealustes märkustes

  10. Una aproximación al concepto de crímenes contra la humanidad

    Directory of Open Access Journals (Sweden)

    José Manuel Díaz Soto

    2012-12-01

    Full Text Available El presente artículo explora el concepto de “crímenes contra la humanidad”, a partir de una revisión histórica y del análisis de los distintos instrumentos internacionales que han consagrado esta categoría normativa. De igual modo, pretende ilustrar al lector acerca de la teoría de los crímenes contra la humanidad formulada por el profesor de la Universidad de Georgetown David J. Luban, para quien el rasgo definidor de estos delitos es que atentan contra la naturaleza política del ser humano. Por último, se destaca la influencia del pensamiento de Luban en la reciente jurisprudencia de la Corte Suprema de Justicia de Colombia acerca de los crímenes contra la humanidad.

  11. Prevención contra las drogas Prevention against drugs

    Directory of Open Access Journals (Sweden)

    Luis Jiménez Herrera

    2010-12-01

    Full Text Available Objetivo: Explorar de manera general algunos aspectos relacionados al tema de la prevención contra las drogas. Metodología: Identificación y revisión de artículos de las bases de datos: EBRARY, E-Libro, EBSCO, ProQuest, Science Direct y Springer Link, con la intención de organizar la información encontrada en las secciones siguientes: contexto general, factores involucrados en el uso y abuso de las drogas, acciones - políticas - prevención contra las drogas y hacia dónde va la investigación. Resultados: Aunque existe una variedad de conceptos relacionados con las drogas, algunos de ellos siguen en discusión dados los múltiples factores involucrados en el proceso. En los últimos años han ocurrido pocos cambios en la oferta y la demanda, pero el consumo entre hombres y mujeres tiende a igualarse, mientras el consumo inicia a edades más tempranas. Se sabe que existen factores protectores y de riesgo que median el uso, abuso y dependencia de las drogas, pero los jóvenes representan el grupo más vulnerable a los efectos de las drogas. Se realizan esfuerzos en muchos sectores pero de una manera no homogénea ni armónica y aunque ha habido esfuerzos por lograr prevención, en especial en el escenario educativo, hay factores que dificultan esta labor. Se evidencia la necesidad de contar con más investigación que permita orientar las distintas acciones para sopesar los efectos dentro del complejo mundo de las drogas Conclusión: Ante el complejo fenómeno de las drogas, se requiere conocer los distintos componentes involucrados para que puedan ser abordados de manera integral. La revisión permitió realizar un acercamiento al tema de prevención contra las drogas.Objective: To explore of general way some aspects related to the subject of the prevention against drugs. Methodology: Identification and article revision of the data bases: EBRARY, E-Libro, EBSCO, ProQuest, Science Direct and Springer Link, with the intention to organize

  12. Overview of IgG4-Related Tubulointerstitial Nephritis and Its Mimickers.

    Science.gov (United States)

    Jeong, Hyeon Joo; Shin, Su-Jin; Lim, Beom Jin

    2016-01-01

    Tubulointerstitial nephritis (TIN) is the most common form of renal involvement in IgG4-related disease. It is characterized by a dominant infiltrate of IgG4-positive plasma cells in the interstitium and storiform fibrosis. Demonstration of IgG4-positive plasma cells is essential for diagnosis, but the number of IgG4-positive cells and the ratio of IgG4-positive/IgG-positive plasma cells may vary from case to case and depending on the methods of tissue sampling even in the same case. IgG4-positive plasma cells can be seen in TIN associated with systemic lupus erythematosus, Sjögren syndrome, or anti-neutrophil cytoplasmic antibody-associated vasculitis, which further add diagnostic confusion and difficulties. To have a more clear view of IgG4-TIN and to delineate differential points from other TIN with IgG4-positive plasma cell infiltrates, clinical and histological features of IgG4-TIN and its mimickers were reviewed. In the rear part, cases suggesting overlap of IgG4-TIN and its mimickers and glomerulonephritis associated with IgG4-TIN were briefly described. PMID:26666884

  13. Actividad repelente de aceites esenciales contra las picaduras de Lutzomyia migonei (Diptera: Psychodidae)

    OpenAIRE

    Elsa Nieves; Janett Fernández Méndez; José Lias; Maritza Rondón; Benito Briceño

    2010-01-01

    Los repelentes naturales de extractos de plantas han mostrado eficacia contra diferentes especies de insectos. El presente estudio evaluó la acción repelente de aceites esenciales extraídos de ocho especies de plantas contra las picaduras de Lutzomyia migonei, vector de Leishmania. Los aceites esenciales se obtuvieron por hidrodestilación, utilizando una trampa de Clevenger, a partir de Hyptis suaveolens, Pimenta racemosa, Piper marginatum, Monticalia imbricatifolia, Pseudognaphalium caeruleo...

  14. Violência contra os idosos: análise documental Violencia contra los ancianos: análisis documental Violence against the aged: documental analysis

    OpenAIRE

    Jacy Aurélia Vieira de Souza; Maria Célia de Freitas; Terezinha Almeida de Queiroz

    2007-01-01

    O objetivo do estudo foi analisar os dados de violência e maus-tratos contra os idosos por meio de documentos oficiais, em Fortaleza-CE. Estudo retrospectivo, documental realizada em uma instituição de referência do Ceará, oficializada em denúncias de violência contra idosos. A coleta de dados ocorreu no primeiro semestre de 2005. Dos 424 documentos analisados, 284(67%) identificou-se como abandono dos idosos. Quanto ao agressor, 207(49%) era filho da vítima. Dentre os casos de violências, 16...

  15. Efectividad del tratamiento de la violencia contra la pareja en pacientes drogodependientes

    Directory of Open Access Journals (Sweden)

    Javier Fernández-Montalvo

    2015-04-01

    Full Text Available En este artículo se analiza la efectividad de los programas de tratamiento psicológico para drogodependientes, que presentan conductas violentas contra la pareja. Para ello, se revisan, en primer lugar, los estudios que valoran la influencia del tratamiento habitual sobre las adicciones y la reducción de las conductas violentas contra la pareja. En segundo lugar, se analizan los resultados de los programas de intervención conjunta que se han desarrollado hasta la fecha, en el ámbito internacional, en los centros de tratamiento para la adicción con drogodependientes que ejercen, además, violencia contra la pareja. Los resultados muestran, por una parte, que la intervención con pacientes adictos produce una disminución importante en la tasa de violencia contra la pareja asociada a la adicción. Por otra parte, los programas de intervención con adicciones constituyen un marco de gran utilidad para aplicar, de forma conjunta, tratamientos específicos para aquellos adictos con un problema asociado de violencia contra la pareja. Los resultados de estos programas de intervención muestran los mejores datos en la reducción de la tasa de violencia contra la pareja de los pacientes adictos. Se comentan las implicaciones de todo ello para la práctica clínica y para las investigaciones futuras.

  16. Covariance structures of fat and protein influence the estimation of IgG in bovine colostrum.

    Science.gov (United States)

    Løkke, Mette Marie; Engelbrecht, Rikke; Wiking, Lars

    2016-02-01

    On-farm instruments for assessing colostrum quality are needed in order to ensure that the calf is supplied with enough IgG to avoid failure of passive transfer. The aim of this study was to evaluate methods for estimating the IgG concentration in cows' colostrum. This research included 126 colostrum samples from 21 Danish farms with different breeds, ensuring a broad variation pattern in IgG, total protein and fat concentration. Approximately one third of the samples did not fulfil the recommendation of >50 g IgG/l colostrum, and the IgG concentration decreased with time from calving to milking. The ratio of IgG to total protein varied from 6 to 61%, however IgG and total protein were correlated with r2 = 0.70. The variation in fat was independent of variations in protein and IgG. The IgG concentration was measured by ELISA and compared to fast measurements by specific gravity by colostrometer, Brix by refractometer and prediction from infrared spectroscopy. The three fast methods were all correlated to the total protein concentration of colostrum; however specific gravity was also influenced by the fat concentration. Furthermore, specific gravity generally overestimated the IgG concentration, and the cut-off level should be raised to 1050 in order to ensure adequate IgG in colostrum. None of the methods estimated IgG concentration better than the correlation of total protein and IgG, meaning that they all depended on the indirect correlation between total protein and IgG. The results suggest that using a refractometer for quality control of colostrum is an easy and feasible method, and a cut-off level of Brix 22 seems sufficient to assure adequate IgG concentration in colostrum fed to the calf. PMID:26869112

  17. Generación de anticuerpos policlonales para la detección de la variante genotípica GIII de PVY, en cultivos de tomate de árbol y papa de Colombia

    Directory of Open Access Journals (Sweden)

    Yuliana Gallo García

    2012-04-01

    Full Text Available Normal 0 21 false false false ES-CO X-NONE X-NONE MicrosoftInternetExplorer4 Título en ingles: Generation of policlonal antibodies for detection of the PVY genotypic variant GIII in tamarillo and potato crops from Colombia Resumen: El potyvirus PVY es uno de los agentes causales más frecuentemente asociados a problemas virales en cultivos de papa y tomate de árbol en Colombia. Dada la importancia económica de las enfermedades causadas por PVY y a la necesidad de generar material de siembra certificado por su sanidad viral, es fundamental la generación de herramientas de diagnóstico que permitan la detección temprana de este virus. En este trabajo se reporta la obtención de anticuerpos policlonales específicos, útiles para la detección del genotipo III de PVY (GIII, una de las tres variantes que recientemente han sido reportadas en cultivos de papa y tomate de árbol de la región Andina de Colombia. Como antígeno, se utilizó un péptido sintético diseñado a partir de la región variable del extremo N-terminal del gen de la cápside viral. La sensibilidad de los anticuerpos fue evaluada mediante pruebas de ELISA y dot-blot utilizando péptidos sintéticos. Se realizó una prueba piloto para validar el uso de los anticuerpos a partir de plantas sintomáticas y asintomáticas obtenidas de una región donde confluyen cultivos de ambas solanáceas, encontrándose que los anticuerpos generados ofrecen mayores niveles de detección que los anticuerpos comerciales comúnmente utilizados para detectar los serotipos PVY-O,C y PVY-N de este virus. Palabras clave: anticuerpos policlonales; ELISA; potyvirus; RT-PCR; virus Y de la papa Abstract: PVY is one of the potyvirus more frequently associated with viral infections in tomato and tamarillo crops in Colombia. Due to the economic impact of PVY and the need to certify seeds as virus-free it is important to develop diagnostic tools that allow its premature detection. In this work, the

  18. Specific IgE, IgG and IgG4 antibodies against house dust mite in patients with bronchial asthma.

    Directory of Open Access Journals (Sweden)

    Okazaki,Morihiro

    1991-08-01

    Full Text Available Serum levels of total IgE, specific IgE, IgG and IgG4 against house dust mite were measured in mite-sensitive asthma patients receiving immunotherapy with house dust. Serum levels of total IgE, mite specific IgE and IgG did not significantly change during the course of hyposensitization. Increased levels of mite specific IgG4 were observed in patients during immunotherapy. The increase in specific IgG4 was dependent on the total dose of house dust administered in both children (r = 0.636, p less than 0.001 and adults (r = 0.629, p less than 0.01. However, the increase of specific IgG4 in adults was not as apparent as in children. These results might suggest that mite specific IgG4 is a useful immunological marker in the immunotherapy for allergic asthma, and that IgG4 antibody acts as a blocking antibody in atopic bronchial asthma.

  19. Are Classification Criteria for IgG4-RD Now Possible? The Concept of IgG4-Related Disease and Proposal of Comprehensive Diagnostic Criteria in Japan

    Directory of Open Access Journals (Sweden)

    Kazuichi Okazaki

    2012-01-01

    Full Text Available Recent studies suggest simultaneous or metachronous lesions in multiorgans characterized by elevated serum levels of IgG4 and abundant infiltration of IgG4-positive plasma cells with various degrees of fibrosis. Two Japanese research committees for IgG4-RD, one from fibrosclerosis (Okazaki team and the other from lymph proliferation (Umehara team supported by the “Research Program for Intractable Disease” of the Ministry of Health, Labor, and Welfare of Japan, have agreed with the unified nomenclature as “IgG4-RD” and proposed the comprehensive diagnostic criteria (CDC for IgG4-RD. Validation of the CDC demonstrated satisfactory sensitivity for the practical use of general physicians and nonspecialists but low sensitivity in the organs to be difficult in taking biopsy specimens such as type1 autoimmune pancreatitis (IgG4-related AIP, compared with IgG4-related sialadenitis/dacryoadenitis (Mikulicz's disease and IgG4-related kidney disease. Although the diagnostic criteria covering all IgG4-RD are hard to be established, combination with the CDC and organ-specific diagnostic criteria should improve sensitivity.

  20. Seroprevalencia de anticuerpos bactericidas frente al meningococo C en Cantabria 10 meses tras la campaña de vacunación

    Directory of Open Access Journals (Sweden)

    Aledo Linos Alvaro Gonzalez de

    1998-01-01

    Full Text Available FUNDAMENTO: En febrero-marzo de 1997 se realizó en Cantabria (Comunidad Autónoma del Estado Español con 541.885 habitantes, de los cuales 107.787 tienen una edad entre 18 meses y 19 años una campaña de vacunación antimeningocócica dirigida a niños entre 18 meses y 19 años, que abarcó a todos sus municipios y alcanzó una cobertura mayor del 95%. En los 12 meses posteriores la eficacia vacunal fue del 95.68% en todas las edades. Para ayudar a decidir una revacunación se realizó un estudio de seroprevalencia de anticuerpos bactericidas en la población vacunada. MÉTODOS: en diciembre de 1997 se analizaron muestras de sangre de 414 niños vacunados, obtenidas al azar de extracciones oportunistas realizadas en Atención Primaria y en Hospitales Públicos de la Comunidad, y de niños escolarizados en las guarderías públicas dependientes de la Dirección General de Bienestar Social de Cantabria. Se analizó la tasa de anticuerpos bactericidas en el Centro Nacional de Microbiología, estableciéndose el nivel de "efecto vacunal" en la dilución 1/8. RESULTADOS: se obtuvieron los siguientes porcentajes de títulos > o = 1/8 (entre paréntesis, grupos de edad al vacunarse: 0% (18-24 meses, 4% (1.5 a 4 años, 7.1% (1.5 a 6 años, 51.3% (6 a 12 años y 81.2% (12 a 19 años. Debido a que la definición de "efecto vacunal" se cifró en la dilución 1/8 de forma artificial, y a que otros trabajos la cifran en 1/4, en 287 sueros con resultado <1/8 se repitió el ensayo bactericida con la dilución 1/4, resultando que 286 (el 99.6% también dieron negativo. Es decir, que el resultado final no variaría si situásemos el punto de corte en la dilución 1/4 en vez de en 1/8. No se encontraron diferencias significativas según la procedencia de municipios donde hubiera habido casos de meningitis C o no los hubiera habido. CONCLUSIONES: la actividad bactericida es muy baja en los menores de 4-6 años, inferior a lo publicado, y mayor por encima de esa

  1. Contra-Rotating Open Rotor Tone Noise Prediction

    Science.gov (United States)

    Envia, Edmane

    2014-01-01

    Reliable prediction of contra-rotating open rotor (CROR) noise is an essential element of any strategy for the development of low-noise open rotor propulsion systems that can meet both the community noise regulations and the cabin noise limits. Since CROR noise spectra typically exhibits a preponderance of tones, significant efforts have been directed towards predicting their tone spectra. To that end, there has been an ongoing effort at NASA to assess various in-house open rotor tone noise prediction tools using a benchmark CROR blade set for which significant aerodynamic and acoustic data had been acquired in wind tunnel tests. In the work presented here, the focus is on the near-field noise of the benchmark open rotor blade set at the cruise condition. Using an analytical CROR tone noise model with input from high-fidelity aerodynamic simulations, detailed tone noise spectral predictions have been generated and compared with the experimental data. Comparisons indicate that the theoretical predictions are in good agreement with the data, especially for the dominant CROR tones and their overall sound pressure level. The results also indicate that, whereas individual rotor tones are well predicted by the linear sources (i.e., thickness and loading), for the interaction tones it is essential that the quadrupole sources be included in the analysis.

  2. UltramicroELISA indirecto para la deteccion de anticuerpos totales a citomegalovirus en suero humano Indirect Ultramicroelisa assay for the detection of human antibodies to cytomegalovirus using human serum samples

    Directory of Open Access Journals (Sweden)

    Jose Laferte

    1992-02-01

    Full Text Available Se normalizó un ultramicroELISA indirecto para la detección de anticuerpos a Citomegalovirus (CMV humano (UMELISA CMV. Se determinó la concentración óptima de antígeno en 30 ug/ml, la dilución de los sueros fue de 1:40 y la dilución de trabajo del conjugado fue de 1:1500. El UMELISA CMV fue comparado con las técnicas de aglutinación de latex para anticuerpos anti-CMV (Dupont de Neumors y la inmunofluorescencia indirecta (EFT. Los resultados mostraron un alto grado de concordancia y elevada copositividad y conegatividad del UMELISA con respecto a estos dos ensayos. El método es válido para el pesquisaje de anticuerpos en banco de sangre asi como para el diagnóstico de la infección mediante sueros pareados.We have standardized an indirect ultramicro ELISA assay for detecting antibodies to human Cytomegalovirus (CMV using human serum samples (UMELISA CMV. The optimal concentration of coating antigen (30 ug/ml, serum dilution (1:40 and anti-human conjugate working dilution (1:1500, were determined by a check board titration method. The UMELISA CMV was compared with the latex agglutination test for antibodies to CMV (Dupont de Nemours and with an indiret immunofluorescent method. The results have showed the high coincidence, sensitivity and especificity of the proposed assay regarding the two methods compared with, and supporting its use either for a blood donors screening or in the serological diagnosis of this infection by paired serum samples.

  3. Production of monoclonal antibodies against conserved components of infectious bronchitis virus Produção de anticorpos monoclonais contra componentes do vírus da bronquite infecciosa das aves

    Directory of Open Access Journals (Sweden)

    C.M. Souza

    2001-10-01

    Full Text Available Murine hybridomas producing IgG1 monoclonal antibodies (Mabs against N and S2 proteins (53KDa and 82KDa, respectively from avian infection bronchitis virus (IBV strain M41 were generated by the fusion of a myeloma cell line (Sp2/0-Ag14 with spleen cells from Balb/c mice previously immunized with whole virus IBV M41. Post-fusion screening criterion was by ELISA and 36 positive hybrids were generated after fusions. Two hybrids specific to N (N3F10 and S2 (S12B2 proteins from M41 (serotype Massachusetts were selected by western blotting. These Mabs recognized the Ark-99 (serotype Arkansas and A5968 (serotype Connecticut IBV strains in addition to M41. By ELISA, the Mab against the S2 (S12B2 recognized all reference and Brazilian strains (M41, SE-17, H52, 297, 283, PM-1, PM-2, PM-3, 351, 29-78 E 327 studied, while the Mab against N recognized only six (M41, SE-17, H52, 283, 327 e 297 strains. The Mab against S2 may become a useful tool for IBV detection on the routine diagnosis of infectious bronchitis, especially for helping the differential diagnosis of clinically and pathologically confusing diseases, while the Mab against N (N3F10 recognized a probably less conserved region among the strains and may be interesting to comparing IBV isolates.Foram produzidos anticorpos monoclonais (AcM da subclasse IgG1 contra as proteínas N (53KDa e S2 (82KDa do vírus da bronquite infecciosa das galinhas (VBIG amostra M41. Os híbridos secretores originaram-se da fusão entre células de mielomas da linhagem Sp2/0-Ag14 e linfócitos B de camundongos Balb/c previamente imunizados com o vírus completo. O primeiro critério de seleção foi por ELISA, no qual 36 híbridos originados de duas fusões reagiram positivamente; destes, foram selecionados dois AcM que reagiram contra as proteínas N (N3D4 e S2 (S12B2 do VBIG da amostra M41 (sorotipo Massachusetts no western blotting. Os mesmos AcM foram também capazes de reconhecer as estirpes Ark-99 (sorotipo Arkansas

  4. Increased IgG4 responses to multiple food and animal antigens indicate a polyclonal expansion and differentiation of pre-existing B cells in IgG4-related disease

    OpenAIRE

    2015-01-01

    Background IgG4-related disease (IgG4-RD) is a systemic fibroinflammatory condition, characterised by an elevated serum IgG4 concentration and abundant IgG4-positive plasma cells in the involved organs. An important question is whether the elevated IgG4 response is causal or a reflection of immune-regulatory mechanisms of the disease. Objectives To investigate if the IgG4 response in IgG4-RD represents a generalised polyclonal amplification by examining the response to common environmental an...

  5. Relación entre la prueba intradermica de histoplasmina y los niveles de anticuerpos detectables por ELISA e immunodifusion Relationship between histoplasmin skin test and Histoplasma capsulatum antibody levels detected by ELISA and immunodiffusion tests

    OpenAIRE

    Carlos M. Fernandez-Andreu; Ana Margarita Cadre-Raton; Gerardo Martinez Machin; Alina Llop Hernandez; Miguel Suarez Hernandez

    1994-01-01

    Se realizó un estudio prospectivo en 40 trabajadores de una granja avícola (grupo 1) considerados con riesgo de exposición a Histoplasma capsulatum, agente etiológico de la histoplasmosis, y en 16 individuos sin riesgo profesional de exposición a dicho agente (grupo 2). En ambos grupos se aplicó la prueba intradérmica de histoplasmina y se obtuvo el suero antes de su aplicación y a los 30 y 180 días después de realizada dicha prueba. Se determinó el nivel de anticuerpos anti-H. capsulatum med...

  6. Efecto de la vacunación anti-leptospira en bovinos lecheros sobre la producción de anticuerpos anti-leptospira en trabajadores de lecherías de cuatro zonas de Costa Rica

    OpenAIRE

    Rafael González; Louise Maranda; Juan José Romero

    2007-01-01

    Objetivo: Este estudio experimental midió el efecto indirecto de la vacuna anti-Leptospira Leptoferm-5® (Pfizer®) en la producción de anticuerpos anti-Leptospira en trabajadores de lecherías de cuatro zonas lecheras de Costa Rica. Materiales y Métodos: Tomaron parte en el estudio 171 vaqueros, 94 en el grupo tratamiento y 77 en el grupo control. A cada vaquero se le tomó una muestra sanguínea en tres diferentes momentos durante un año: la primera, antes de aplicar la vacuna en los anima...

  7. Encuesta sobre la realización de las pruebas de detección de los anticuerpos anti-VIH en los laboratorios de Cataluña Survey of HIV testing in laboratories in Catalonia [Spain

    OpenAIRE

    María Jesús Casado; Ariadna Rovira; Carles Blanch; Jordi Casabona

    2004-01-01

    Para poder interpretar correctamente la epidemia de infección por el VIH, es indispensable garantizar la calidad en la realización del test anti-VIH. Con el objetivo de describir las características durante el proceso analítico e identificar aspectos susceptibles de mejora, en 1998 se realizó una encuesta sobre la garantía de calidad en los laboratorios de Cataluña que realizaban pruebas de detección de anticuerpos anti-VIH. Los resultados de la encuesta muestran la variabilidad de los proces...

  8. Urticaria crónica con alteraciones de la función tiroidea y anticuerpos antiperoxidasa tiroidea Chronic urticaria with alterations of the thyroid function and thyroid peroxidase antibodies

    OpenAIRE

    Diego S. Fernández Romero; Alejandro Malbrán

    2005-01-01

    La urticaria crónica es una enfermedad frecuente, caracterizada por la presencia de ronchas y/o angioedema con una duración superior a las 6 semanas. En un número importante de pacientes se comporta como una enfermedad autoinmune asociada frecuentemente con alteraciones en la función tiroidea y con la presencia de anticuerpos antitiroideos. Presentamos una serie de 70 pacientes consecutivos con diagnóstico de urticaria crónica a los cuales les investigamos la función tiroidea y la presencia d...

  9. Obtención de anticuerpos policlonales IgY antiparvovirus canino y evaluación en un sistema de aglutinación con látex

    Directory of Open Access Journals (Sweden)

    Jannet González-Figueredo

    2015-12-01

    Full Text Available La parvovirosis canina es una de las principales infecciones que provoca gastroenteritis, fundamentalmente en cachorros, con altos índices de morbiletalidad. Los diagnosticadores más utilizados se basan en la detección de partículas virales excretadas durante la fase aguda de la enfermedad. Algunos requieren equipos especializados, lo que aumenta los costos y el tiempo de diagnóstico. Por esto, la simplificación de estos métodos con alta sensibilidad y especificidad es prioritaria. En Cuba solo se logra un diagnóstico presuntivo sin la completa confirmación de la enfermedad, principalmente por la escasez o ausencia de un medio diagnóstico en toda la red de consultorios y clínicas veterinarias, rápido, eficaz y ajustable a nuestras condiciones. Este trabajo tuvo como objetivo obtener anticuerpos policlonales IgY a partir de yema de huevo de gallina y evaluarlos mediante un sistema de látex-aglutinación, para su posible uso como terapia y principalmente en el diagnóstico. Se inmunizaron por vía intramuscular dos gallinas de raza Leghorn con una cepa atenuada de parvovirus canino (PVC tipo 2. Se aplicaron 8 inoculaciones por ave cada 15 días. Se cosecharon los huevos y se purificaron los anticuerpos por el método de sulfato de dextrana/sulfato de sodio. Se determinó el título de IgY anti-PVC por el método de Inhibición de la Hemoaglutinación (IH y con antígeno de PVC acoplado a partículas de látex de poliestireno. Por IH se obtuvo un título de IgY anti-PVC de 1:1024. Las mezclas de anticuerpos con títulos alto y medio de ambas gallinas aglutinaron con los reactivos preparados con 230 y 460 µg/mL de antígeno. La mayor intensidad de la reacción y la mejor detectabilidad correspondieron a los reactivos elaborados con los anticuerpos de mayor título.

  10. IgG and IgG4 antibodies in subjects with irritable bowel syndrome: a case control study in the general population

    Directory of Open Access Journals (Sweden)

    Ligaarden Solveig C

    2012-11-01

    Full Text Available Abstract Background Patients with Irritable Bowel Syndrome (IBS often relate their symptoms to the intake of food and modify their diet. IgE-mediated food allergy is uncommon in IBS, but the role of IgG-mediated food hypersensitivity remains inconclusive. The primary aim of this study was to compare food- and yeast-specific IgG and IgG4 antibodies in subjects with and without IBS. Methods This was a case control study in the general population for which subjects completed questionnaires about abdominal complaints and their intake of common food items. Blood samples were collected, and food- and yeast-specific IgG and IgG4 antibodies were measured. Antibodies were measured in mg/L. Results We included 269 subjects with IBS and 277 control subjects. After correction for subject characteristics and diet, there were no significant differences with regard to food- and yeast-specific IgG and IgG4 antibodies between subjects with IBS and controls. Lower values of IgG antibodies against egg (OR 0.99 (0.98 to 1.00, p = 0.002 and beef (OR 0.75 (0.60 to 0.94, p = 0.012 and higher values of IgG antibodies against chicken (OR 1.14 (1.03 to 1.27, p = 0.009 were associated with more severe symptoms. Conclusions Our findings suggest that IgG-and IgG4-mediated food and yeast hypersensitivity in IBS is unlikely. IgG antibodies against food and yeast may reflect the diet.

  11. IgG Conformer's Binding to Amyloidogenic Aggregates.

    Directory of Open Access Journals (Sweden)

    Monichan Phay

    Full Text Available Amyloid-reactive IgGs isolated from pooled blood of normal individuals (pAbs have demonstrated clinical utility for amyloid diseases by in vivo targeting and clearing amyloidogenic proteins and peptides. We now report the following three novel findings on pAb conformer's binding to amyloidogenic aggregates: 1 pAb aggregates have greater activity than monomers (HMW species > dimers > monomers, 2 pAbs interactions with amyloidogenic aggregates at least partially involves unconventional (non-CDR interactions of F(ab regions, and 3 pAb's activity can be easily modulated by trace aggregates generated during sample processing. Specifically, we show that HMW aggregates and dimeric pAbs present in commercial preparations of pAbs, intravenous immunoglobulin (IVIg, had up to ~200- and ~7-fold stronger binding to aggregates of Aβ and transthyretin (TTR than the monomeric antibody. Notably, HMW aggregates were primarily responsible for the enhanced anti-amyloid activities of Aβ- and Cibacron blue-isolated IVIg IgGs. Human pAb conformer's binding to amyloidogenic aggregates was retained in normal human sera, and mimicked by murine pAbs isolated from normal pooled plasmas. An unconventional (non-CDR component to pAb's activity was indicated from control human mAbs, generated against non-amyloid targets, binding to aggregated Aβ and TTR. Similar to pAbs, HMW and dimeric mAb conformers bound stronger than their monomeric forms to amyloidogenic aggregates. However, mAbs had lower maximum binding signals, indicating that pAbs were required to saturate a diverse collection of binding sites. Taken together, our findings strongly support further investigations on the physiological function and clinical utility of the inherent anti-amyloid activities of monomeric but not aggregated IgGs.

  12. Pancreatic cancer with a high serum IgG4 concentration

    Institute of Scientific and Technical Information of China (English)

    Terumi Kamisawa; Pong Yui Chen; Yuyang Tu; Hitoshi Nakajima; Naoto Egawa; Kouji Tsuruta; Atsutake Okamoto; Tsunekazu Hishima

    2006-01-01

    Differentiation between autoimmune pancreatitis and pancreatic cancer is sometimes difficult. It has been reported that serum IgG4 concentrations are significantly elevated and particularly high (>135 mg/dL) in autoimmune pancreatitis. Measurement of serum IgG4 has become a useful tool for differentiating between autoimmune pancreatitis and pancreatic cancer. However,we present a 74-year-old female with a markedly elevated serum IgG4 (433 mg/dL) who underwentpancreaticoduodenectomy for pancreatic cancer. Elevated serum IgG4 levels continued after the resection. On histology, adenocarcinoma of the pancreas accompanied with moderate lymphoplasmacytic infiltration infiltrated the lower bile duct and duodenum, but there were no findings of autoimmune pancreatitis. Although a small metastasis was detected in one parapancreatic lymph node, regional lymph nodes were swollen. Abundant IgG4-positive plasma cells infiltrated the cancerous areas of the pancreas, but only a few IgG4-positive plasma cells were detected in the noncancerous areas.Pancreatic cancer cells were not immunoreactive for IgG4. An abundant infiltration of IgG4-positive plasma cells was detected in the swollen regional lymph nodes and in the duodenal mucosa. We believe that the serum IgG4 level was elevated in this patient with pancreatic cancer as the result of an IgG4-related systemic disease that had no clinical manifestations other than lymphadenopathy.

  13. Erdheim-Chester Disease as a Mimic of IgG4-Related Disease

    Science.gov (United States)

    Gianfreda, Davide; Musetti, Claudio; Nicastro, Maria; Maritati, Federica; Cobelli, Rocco; Corradi, Domenico; Vaglio, Augusto

    2016-01-01

    Abstract Immunoglobulin-G4 (IgG4)-related disease (IgG4RD) is a fibro-inflammatory disorder characterized by tissue-infiltrating IgG4+ plasma cells, and, often, high serum IgG4. Several autoimmune, infectious, or proliferative conditions mimic IgG4RD. Erdheim-Chester disease (ECD) is a rare non-Langerhans cell histiocytosis, characterized by foamy histiocytic infiltration, fibrosis, and chronic inflammation. ECD and IgG4RD manifestations may overlap. A patient presented with huge fibrous retroperitoneal masses causing compression on neighboring structures; the case posed the challenge of the differential diagnosis between IgG4RD and ECD mainly because of a prominent serum and tissue IgG4 response. Retroperitoneal biopsy led to the diagnosis of ECD; the V600E BRAF mutation was found. Treatment with the BRAF inhibitor vemurafenib was started. Treatment failed to induce mass regression and the patient died after 3 months of therapy. Prompted by this case, we examined serum and tissue IgG4 in a series of 15 ECD patients evaluated at our center, and found that approximately one-fourth of the cases have increased IgG4 in the serum and often in the tissue. The differential diagnosis between IgG4RD and ECD can be challenging, as some ECD patients have prominent IgG4 responses. This suggests the possibility of common pathogenic mechanisms between ECD and IgG4RD. PMID:27227923

  14. IgG4 immunostaining and its implications in orbital inflammatory disease.

    Directory of Open Access Journals (Sweden)

    Amanda J Wong

    Full Text Available OBJECTIVE: IgG4-related disease is an emerging clinical entity which frequently involves tissue within the orbit. In order to appreciate the implications of IgG4 immunostaining, we analyzed gene expression and the prevalence of IgG4- immunostaining among subjects with orbital inflammatory diseases. METHODS: We organized an international consortium to collect orbital biopsies from 108 subjects including 22 with no known orbital disease, 42 with nonspecific orbital inflammatory disease (NSOI, 26 with thyroid eye disease (TED, 12 with sarcoidosis, and 6 with granulomatosis with polyangiitis (GPA. Lacrimal gland and orbital adipose tissue biopsies were immunostained for IgG4 or IgG secreting plasma cells. RNA transcripts were quantified by Affymetrix arrays. RESULTS: None of the healthy controls or subjects with TED had substantial IgG4 staining. Among the 63 others, the prevalence of significant IgG4-immunostaining ranged from 11 to 39% depending on the definition for significant. IgG4 staining was detectable in the majority of tissues from subjects with GPA and less commonly in tissue from subjects with sarcoidosis or NSOI. The detection of IgG4+ cells correlated with inflammation in the lacrimal gland based on histology. IgG4 staining tissue expressed an increase in transcripts associated with inflammation, especially B cell-related genes. Functional annotation analysis confirmed this. CONCLUSION: IgG4+ plasma cells are common in orbital tissue from patients with sarcoidosis, GPA, or NSOI. Even using the low threshold of 10 IgG4+ cells/high powered field, IgG4 staining correlates with increased inflammation in the lacrimal gland based on histology and gene expression.

  15. A case of marginal zone B cell lymphoma mimicking IgG4-related dacryoadenitis and sialoadenitis

    OpenAIRE

    Ohta, Miho; Moriyama, Masafumi; Goto, Yuichi; Kawano, Shintaro; Tanaka, Akihiko; Maehara, Takashi; Furukawa, Sachiko; Hayashida, Jun-Nosuke; KIYOSHIMA, TAMOTSU; Shimizu, Mayumi; Arinobu, Yojiro; Nakamura, Seiji

    2015-01-01

    Background IgG4-related dacryoadenitis and sialoadenitis (IgG4-DS), so-called Mikulicz’s disease, is characterized by elevated serum IgG4 and infiltration of IgG4-positive plasma cells in glandular tissues. Recently, several studies reported both malignant lymphoma developed on the background of IgG4-associated conditions and IgG4-producing malignant lymphoma (non-IgG4-related disease). Case presentation We report on the case of a 70-year-old man who was strongly suspected IgG4-DS because of ...

  16. A subset of ocular adnexal marginal zone lymphomas may arise in association with IgG4-related disease

    OpenAIRE

    Kyotaro Ohno; Yasuharu Sato; Koh-ichi Ohshima; Katsuyoshi Takata; Tomoko Miyata-Takata; Mai Takeuchi; Yuka Gion; Tomoyasu Tachibana; Yorihisa Orita; Toshihiro Ito; Swerdlow, Steven H.; Tadashi Yoshino

    2015-01-01

    We previously suggested a relationship between ocular immunoglobulin (Ig)G4-related disease (IgG4-RD) and marginal zone lymphomas (MZLs). However, the cytokine background associated with these disorders and whether it differs between ocular adnexal MZLs with (IgG4-associated MZL) and without (IgG4-negative MZL) numerous IgG4+ plasma cells are unknown. In this study, we identified the mRNA expression pattern of Th2 and regulatory T-cell (Treg) cytokines in IgG4-RD and in IgG4-associated MZL an...

  17. Recent Advances in the Concept and Pathogenesis of IgG4-Related Disease in the Hepato-Bilio-Pancreatic System

    OpenAIRE

    Okazaki, Kazuichi; Yanagawa, Masahito; Mitsuyama, Toshiyuki; Uchida, Kazushige

    2014-01-01

    Recent studies have proposed nomenclatures of type 1 autoimmune pancreatitis (AIP) (IgG4-related pancreatitis), IgG4-related sclerosing cholangitis (IgG4-SC), IgG4-related cholecystitis, and IgG4-related hepatopathy as IgG4-related disease (IgG4-RD) in the hepato-bilio-pancreatic system. In IgG4-related hepatopathy, a novel concept of IgG4-related autoimmune hepatitis (AIH) with the same histopathological features as AIH has been proposed. Among organs involved in IgG4-RD, associations with p...

  18. A New Nanogold-Labeled Immunoresonance Scattering Spectral Probe for Determination of Trace IgG

    Institute of Scientific and Technical Information of China (English)

    JIANG,Zhi-Liang; LI,Yan; SUN,Shuang-Jiao; CHEN,Bing

    2007-01-01

    A kind of 9 nm gold nanoparticles was prepared with the trisodium citrate and used to label goat anti-human IgG to obtain an IgG immunoresonance scattering spectral probe. In pH 5.8 buffer solution and in the presence of polyethylene glycol (PEG), the immune reaction between gold-labeled goat anti-human IgG and IgG took place,and the resonance scattering intensity at 580 nm (I580nm) was enhanced greatly. The enhanced intensity △IRS is proportional to the IgG concentration from 1.3 to 1.5 × 103 ng·mL 1, with a detection limit of 0.78 ng·mL-1. This assay showed high sensitivity and good selectivity for quantitative determination of IgG in human serum, with satisfactory results.

  19. Nontuberculous mycobacterial infection with concurrent IgG4-related lymphadenopathy.

    Science.gov (United States)

    Liu, Ting-Ting; Weng, Shao-Wen; Wang, Ming-Chung; Huang, Wan-Ting

    2016-03-01

    Disseminated nontuberculous mycobacteria (NTM) infection with concurrent IgG4-related lymphadenopathy has not been reported. We described a patient with neutralizing autoantibodies to interferon-gamma (IFN-γ) and elevated levels of serum IgG4 presenting with generalized lymphadenopathy and reactive dermatosis. Histologically, lymph nodes (LNs) showed effaced nodal architecture with polymorphic infiltrates, mimicking angioimmunoblastic T-cell lymphoma. Both the absolute number and the ratio of IgG4+ plasma cells to IgG+ plasma cells were increased. Mycobacterium abscessus was isolated from cultures of LNs, and demonstrated by polymerase chain reaction-restriction fragment length polymorphism. The skin biopsy showed neutrophilic dermatosis, consistent with Sweet syndrome. The patient met the criteria of both adult-onset immunodeficiency syndrome and IgG4-related lymphadenopathy. This case provides evidence of disseminated NTM infection with concurrent type III IgG4-related lymphadenopathy in the patient with anti-IFN-γ autoantibodies. PMID:26660641

  20. Limitaciones para el serodiagnóstico del virus del oeste del Nilo en zonas endémicas con co-circulación de Flavivirus en el Caribe colombiano

    Directory of Open Access Journals (Sweden)

    Salim Máttar

    2005-09-01

    Full Text Available Introducción: Esta es la primera aproximación sero-epidemiológica que se hace en Colombia sobre el virus del Oeste del Nilo (VON. Objetivo: El propósito de este estudio fue el de establecer la presencia de anticuerpos IgG contra el VON en una población de la costa atlántica utilizando dos pruebas comerciales y establecer su utilidad. Materiales y método: Se analizaron de forma aleatoria 52 muestras de sueros de personas que trabajaban en labores agrícolas desde hacia más de 15 años en el departamento de Sucre. Se utilizó la técnica West Nile Virus IgG ELISA (Focus Technologies. También se utilizó la prueba de inmunofluorescencia (PANBIO Columbia. Arbovirus IgG-IFA slides, donde se evaluó la detección de anticuerpos contra cinco antígenos diferentes de arbovirus (encefalitis equina venezolana, encefalitis japonesa, fiebre amarilla y dengue. Resultados: Con la prueba de ELISA, de 52 sueros estudiados para la detección de anticuerpos contra VON, 38 (73% resultaron positivos, los 14 (27% restantes resultaron negativos. Con la prueba de IFA, 6 sueros (11.5% resultaron seropositivos débiles para VON, 46 (88.5% resultaron negativos para la detección de anticuerpos contra el VON. Utilizando IFA se presentaron reacciones cruzadas contra otros arbovirus como dengue, encefalitis venezolana y japonesa y fiebre amarilla. El estudio demostró la complejidad del serodiagnóstico de Flavivirus en las zonas endémicas como la del Caribe colombiano. Conclusión: Los resultados obtenidos en este estudio demuestran que las pruebas de ELISA e IFA para humanos son de poca utilidad diagnóstica contra el VON en las zonas colombianas donde se presentan circulación de otros Flavivirus como dengue, fiebre amarilla o encefalitis equina.

  1. A three-layer immunoradiometric assay for determination of IgG subclass antibodies in Human Sera (''IgG subclass RAST'')

    International Nuclear Information System (INIS)

    We report the development of a three-layer immunoradiometric assay (TIRA) for measurement of IgG antibodies of all four subclasses in human sera. The first layer consists of diluted human serum, the second layer is monoclonal mouse antibodies to human IgG subclasses, and the third layer is 125I-labelled rabbit anti-mouse IgG. Monoclonal anti-IgGI, anti-IgG3 and anti-IgG4 reacted only with their complementary IgG subclass, whereas the anti-IgG2 showed slight cross-reactivity to immunoglobins of other subclasses and classes and to light chain proteins. The observed cross-reactivity was found to be without importance, when the TIRA was applied to measurement of IgG subclass antibodies. Equipotency was established by use of appropriate dilutions of the monoclonal antibodies, and the assay was calibrated by use of human reference serum. The TIRA therefore permits reliable inter-individual and intra-individual comparisons of the IgG antibody response in all four subclasses. Non-specific binding obtained with pooled normal human serum was below 0.33%. Inter-assay coefficient of variation was between 18 and 27%. The TIRA was applied to measurement of IgG subclass antibodies to timothy grass pollen in sera from grass pollen allergies undergoing immunotherapy. (author)

  2. In men at risk of HIV infection, IgM, IgG1, IgG3, and IgA reach the human foreskin epidermis.

    Science.gov (United States)

    Lemos, M P; Karuna, S T; Mize, G J; Fong, Y; Montano, S M; Ganoza, C; Lama, J R; Sanchez, J; McElrath, M J

    2016-05-01

    We profiled the humoral response in the penis, an area that has been minimally explored but may be relevant for protecting insertive men against HIV and other sexually acquired infections. Comparing paired tissue samples from 20 men at risk of HIV infection, foreskin contains less immunoglobulin A (IgA) and more IgG2 than colon. Using foreskin dermal and epidermal explants and paired plasma from 17 men, we examined Ig accumulation by normalizing Ig to human serum albumin (HSA) transudation. Dermal IgM, IgG2, IgA, and IgE ratios were greater than that in plasma, suggesting there is local antibody secretion at the dermis. Local Ig transcription was concentrated at the inner rather than the outer foreskin, and inner foreskin Ig ratios did not correlate with blood, indicating that localized production can contribute to the foreskin response. IgM, IgG1, IgG3, and IgA have preferential access to the foreskin epidermis, whereas IgG2, IgG4, and IgE are restricted to the dermis. Lastly, Ad5-specific IgA was selectively present in the colon, whereas foreskin Ad5 IgG was mainly derived from blood, and reached the inner epidermis at higher ratios than the outer (P<0.002). In summary, the foreskin antibody response combines local and systemic sources, and there is selective isotype accumulation in the epidermis. PMID:26509877

  3. Evaluación serológica de una proteína recombinante a partir de una cepa aislada del virus de la fiebre amarilla en el Perú: un estudio piloto

    Directory of Open Access Journals (Sweden)

    Carlos Yábar V

    2003-10-01

    Full Text Available Objetivo: Evaluar serológicamente una proteína recombinante de 66 kDa (Er66 de una cepa del virus de la fiebre amarilla aislada en el Perú usando anticuerpos inmunoreactivos. Material y métodos: La proteína Er66 fue expresada in vitro en la bacteria Escherichia coli y enfrentada a títulos de 1/100, 1/50 y 1/25 de anticuerpos monoclonales, y a sueros con anticuerpos IgM e IgG inmunoreactivos contra el virus de la fiebre amarilla mediante ensayos de Western blot (WB. Asimismo, se evaluaron proteínas totales de las cepas de referencia del virus dengue (DEN y fiebre amarilla como controles de antigenicidad. Resultados: La proteína recombinante Er66 presentó antigenicidad contra títulos de 1/50 y 1/25 de anticuerpo monoclonal (MAB8701; sin embargo, no se observó inmunoreactividad en sueros positivos para fiebre amarilla y dengue. Los ensayos con extractos crudos de la cepa de fiebre amarilla Asibi 17D (PTFA revelaron que la antigenicidad de las proteínas virales comprendidas entre 60 y 80 kDa fue afectada negativamente a temperaturas desnaturalizantes de 100°C. En cambio, tratamientos con ß-mercaptoetanol sin calor generó un aumento de la antigenicidad de dichas proteínas. Siguiendo este mismo principio, la proteína Er66 fue sometida a tratamientos desnaturalizantes con ß-mercaptoetanol sin incluir calor y fue enfrentada nuevamente a los sueros reactivos. El resultado final reveló que la proteína Er66 generó inmunoreactividad frente a sueros con altos títulos de anticuerpos IgM e IgG para fiebre amarilla mientras que en otras muestras se observó una débil señal. Conclusiones: Los datos obtenidos en este trabajo demuestran que la Er66 pudo ser reconocida por anticuerpos IgM e IgG específicos para fiebre amarilla presentes en sueros de pacientes infectados. Los datos presentados en este artículo sugieren el uso de proteínas recombinantes como posibles candidatas de valor diagnóstico para la FA.

  4. High Serum IgG4 Concentrations in Patients with Hashimoto’s Thyroiditis

    OpenAIRE

    2015-01-01

    Purpose. Since recent reports suggest that Hashimoto thyroiditis (HT) may be associated with IgG4-related disease, we aimed to find out whether the measurement of serum IgG4 allows for the identification of distinct types of HT, with different clinical, sonographic, and serologic characteristics. Methods. The group studied consisted of 53 patients with HT and 28 healthy individuals who underwent thyroid ultrasonography and body composition analysis. Serum concentrations of IgG4, TSH, anti-per...

  5. Cavitating Lung Disease: A Novel Presentation of IgG4-Related Disease

    OpenAIRE

    Praveen K. Jinnur; Eunhee S. Yi; Ryu, Jay H.; Iyer, Vivek N.

    2015-01-01

    Patient: Male, 60 Final Diagnosis: IgG4 related disease Symptoms: Cough • hemoptysis Medication: — Clinical Procedure: None Specialty: Pulmonology Objective: Rare disease Background: Immunoglobulin (Ig) G4-related disease, previously referred to as IgG4-related sclerosing disease or hyper-IgG4 disease, may occur in the lung, involving alveolar parenchyma, airways, and pleura. Various pulmonary manifestations of IgG4-related disease have been reported, but to the best of our knowledge a cavita...

  6. IgG4-Related Disease Presenting as a Solitary Neck Mass

    OpenAIRE

    McKinnon, Tyler; Randazzo, William T; Kim, Brian D; Biddinger, Paul; Forseen, Scott

    2015-01-01

    IgG4-related disease is a newly recognized entity associated with autoimmune conditions involving almost every organ system. It is characterized by elevated serum IgG4 as well as mass like tissue infiltration by IgG4-positive plasma cells. Imaging findings are nonspecific, vary depending on the site of disease, and include mass like enlargement of the salivary or lacrimal glands and enlarged lymph nodes. Radiographic findings often mimic malignancy, necessitating tissue sampling to confirm th...

  7. IgG4-related tubulointerstitial nephritis accompanied with cystic formation

    OpenAIRE

    Fukuhara, Hideo; Taniguchi, Yoshinori; Matsumoto, Manabu; Kuroda, Naoto; Fukata, Satoshi; Inoue, Keiji; Fujimoto, Shimpei; Terada, Yoshio; Shuin, Taro

    2014-01-01

    Background An immunoglobulin G4 (IgG4)-related disease is important disease in differential diagnosis of tumors in kidney, pancreas, lung and other organs. The imaging findings of IgG4-related kidney diseases are usually expressed as defect contrast region, while cystic formation in kidney is extremely rare. Here, we report a case of IgG4-related tubulointerstitial nephritis with renal cystic change caused by the narrowing or obstruction of collecting duct in renal medulla. Case presentation ...

  8. Clinical and imaging diagnosis of IgG4-related disease in the head and neck

    International Nuclear Information System (INIS)

    IgG4-related disease in the head and neck is a newly recognized multi-organ system disease characterized by elevated serum IgG4, infiltration of numerous IgG4-positive plasma cells, tissue fibrosis, and dramatic response to corticosteroid treatment. IgG4-related disease of the head and neck has some relative characteristics on CT and MRI, which can provide valuable information for the diagnosis and differential diagnosis, and are helpful for the clinical treatment, evaluation of therapeutic effects and prediction of prognosis. (authors)

  9. IgG4-related disease: case report and literature review

    OpenAIRE

    Nizar, Abo-Helo; Toubi, Elias

    2015-01-01

    IgG4-related disease (IgG4-RD) is relatively a new growing entity of immune-mediated origin, characterized by a mass-forming lesion, the infiltration of IgG4-positive plasma cells and occasionally elevated serum IgG4. It is considered to be both a systemic inflammation and sclerosing disease. The most common manifestations are parotid and lacrimal swelling, lymphadenopathy and autoimmune pancreatitis. Sclerosing cholangitis and retroperitoneal fibrosis are among the other mentioned frequent m...

  10. IgG4-positive plasma cell infiltration in explanted livers for primary sclerosing cholangitis

    OpenAIRE

    Zen, Yoh; Quaglia, Alberto; Portmann, Bernard

    2011-01-01

    Abstract Aims: To explore whether IgG4-related sclerosing cholangitis (IgG4-SC) contributes to end-stage primary sclerosing cholangitis (PSC) in UK. Methods and Results: This study consisted of 41 patients who underwent liver transplantation for advanced PSC. Explanted livers were histologically examined with an emphasis on IgG4-positive plasma cell infiltration. Thirty-nine cases (95%) had minimal or mild infiltration of IgG4-positive plasma cells (? 30 cells/high power field)...

  11. A novel immunopathological association of IgG4-RD and vasculitis with Hashimoto's thyroiditis

    OpenAIRE

    Minamino, Hiroto; Inaba, Hidefumi; Ariyasu, Hiroyuki; Furuta, Hiroto; Nishi, Masahiro; Yoshimasu, Takashi; Nishikawa, Akinori; Nakanishi, Masanori; Tsuchihashi, Shigeki; Kojima, Fumiyoshi; Murata, Shin-ichi; Inoue, Gen; Akamizu, Takashi

    2016-01-01

    Summary A 73-year-old man with Hashimoto's thyroiditis (HT) suffered from purpura on the lower legs. He was diagnosed with IgG4-related disease (IgG4-RD) with serum IgG4 elevation and dacryo-sialadenitis confirmed histologically. Serum Th2 and Treg cytokines, interleukin 7 (IL7), IL8 and Th2 chemokine levels were elevated, while skewed Th1 balance was seen in fluorescence-activated cell sorting (FACS). Therefore, preferential Th1 balance in HT appeared to be followed by IgG4-RD characterized ...

  12. Prevalence of Atopy, Eosinophilia, and IgE Elevation in IgG4-Related Disease

    OpenAIRE

    Torre, Emanuel Della; Mattoo, Hamid; Mahajan, Vinay S; Carruthers, Mollie; Pillai, Shiv; John H. Stone

    2013-01-01

    IgG4-related disease (IgG4-RD) is a fibroinflammatory disorder that can affect virtually every organ system. T helper type 2 responses have been presumed to be pathogenic in this disease and a high proportion of IgG4-RD patients are reported to have longstanding allergies, peripheral blood eosinophilia, and serum IgE elevation. It has therefore been proposed that allergic mechanisms drive IgG4-RD. However, no epidemiological assessment of atopy, peripheral blood eosinophilia, serumIgEconcentr...

  13. The importance of IgG4 in the predictive model of thyroiditis

    OpenAIRE

    Pandrc, Milena S; Petrović, Stanko; Kostovski, Vanja; Petrović, Marijana; Zarić, Miloš

    2015-01-01

    Summary Immunoglobulin (Ig)G4-related sclerosing disease (IgG4-RSD) is a new disease entity first proposed with regard to autoimmune pancreatitis. A 67-year-old male patient was examined because of weight loss and an abdominal pain. Based on the clinical characteristics, laboratory parameters and ultrasound features, we identified the diagnosis of the IgG4-related systemic disease (IgG4-RSD), that was confirmed by the histopathological analysis after the biopsy of the head of pancreas. After ...

  14. Orbital IgG4-Related Disease: Clinical Features and Diagnosis

    OpenAIRE

    KUBOTA, TOSHINOBU; Moritani, Suzuko

    2012-01-01

    Orbital IgG4-related disease, which can occur in adults of any age, is characterized by IgG4-positive lymphoplasmacytic infiltrations in ocular adnexal tissues. The signs and symptoms include chronic noninflammatory lid swelling and proptosis. Patients often have a history of allergic disease and elevated serum levels of IgG4 and IgE as well as hypergammaglobulinemia. Orbital IgG4-related disease must be differentiated from idiopathic orbital inflammation and ocular adnexal marginal zone B-ce...

  15. Clinical relevance of Küttner tumour and IgG4-related dacryoadenitis and sialoadenitis

    OpenAIRE

    Furukawa, S.; Moriyama, M; Kawano, S; Tanaka, A; Maehara, T.; Hayashida, J-N; Goto, Y.; Kiyoshima, T; Shiratsuchi, H; Ohyama, Y.; Ohta, M.; Imabayashi, Y; Nakamura, S.

    2014-01-01

    Objectives Küttner tumour (KT), so-called chronic sclerosing sialoadenitis, is characterised by concomitant swelling of the submandibular glands secondary to strong lymphocytic infiltration and fibrosis independent of sialolith formation. However, recent studies have indicated that some patients with KT develop high serum levels of IgG4 and infiltration of IgG4-positive plasma cells, namely IgG4-related dacryoadenitis and sialoadenitis (IgG4-DS), so-called Mikulicz's disease. The aim of this ...

  16. IgG4 Related Disease of the Head and Neck

    OpenAIRE

    Deshpande, Vikram

    2015-01-01

    IgG4 related disease of the head and neck region represents one of the more common manifestations of IgG4 related disease. Involvement of the submandibular and parotid glands, the orbit and thyroid represent some of the more common sites involved by IgG4 related disease. Eosinophilic angiocentric fibrosis, Mikulicz disease and Riedel thyroiditis are also members of the family of IgG4 related disease. Clinically, the disease is characterized by tumefactive lesions, often multicentric, that sho...

  17. IgG4-Related Esophageal Disease Presenting as Esophagitis Dissecans Superficialis With Chronic Strictures

    OpenAIRE

    Dumas-Campagna, Myriam; Bouchard, Simon; Soucy, Genevieve; Bouin, Mickael

    2014-01-01

    IgG4-related disease is a recently recognized autoimmune systemic disorder that has been described in various organs. The disease is characterized histologically by a dense lymphoplasmocytic infiltrate of IgG4-positive cells, storiform fibrosis and can be associated with tumefactive lesions. IgG4-related disease involving the upper gastrointestinal tract is rare and only two previous case reports have reported IgG4-related esophageal disease. We report the case of a 63-year-old female patient...

  18. IgG1 Fc N-glycan galactosylation as a biomarker for immune activation.

    Science.gov (United States)

    de Jong, Sanne E; Selman, Maurice H J; Adegnika, Ayola A; Amoah, Abena S; van Riet, Elly; Kruize, Yvonne C M; Raynes, John G; Rodriguez, Alejandro; Boakye, Daniel; von Mutius, Erika; Knulst, André C; Genuneit, Jon; Cooper, Philip J; Hokke, Cornelis H; Wuhrer, Manfred; Yazdanbakhsh, Maria

    2016-01-01

    Immunoglobulin G (IgG) Fc N-glycosylation affects antibody-mediated effector functions and varies with inflammation rooted in both communicable and non-communicable diseases. Worldwide, communicable and non-communicable diseases tend to segregate geographically. Therefore, we studied whether IgG Fc N-glycosylation varies in populations with different environmental exposures in different parts of the world. IgG Fc N-glycosylation was analysed in serum/plasma of 700 school-age children from different communities of Gabon, Ghana, Ecuador, the Netherlands and Germany. IgG1 galactosylation levels were generally higher in more affluent countries and in more urban communities. High IgG1 galactosylation levels correlated with low total IgE levels, low C-reactive protein levels and low prevalence of parasitic infections. Linear mixed modelling showed that only positivity for parasitic infections was a significant predictor of reduced IgG1 galactosylation levels. That IgG1 galactosylation is a predictor of immune activation is supported by the observation that asthmatic children seemed to have reduced IgG1 galactosylation levels as well. This indicates that IgG1 galactosylation levels could be used as a biomarker for immune activation of populations, providing a valuable tool for studies examining the epidemiological transition from communicable to non-communicable diseases. PMID:27306703

  19. Maternofetal transplacental transport of recombinant IgG antibodies lacking effector functions

    DEFF Research Database (Denmark)

    Mathiesen, Line; Nielsen, Leif K; Andersen, Jan Terje;

    2013-01-01

    alloimmunity, which may be lethal. A novel strategy to control pathogenic antibodies would be administration of a non-destructive IgG antibody blocking antigen binding while retaining binding to FcRn. We report on two human IgG3 antibodies with a hinge deletion and a C131S point mutation (IgG3ΔHinge) that...... transported efficiently from the maternal to the fetal placental compartment. Thus, IgG3ΔHinge:R435H may be a good candidate for transplacental delivery of a non-destructive antibody to the fetus to combat pathogenic antibodies....

  20. Biochemical and biophysical characterization of humanized IgG1 produced in Pichia pastoris

    OpenAIRE

    Ha, Sha; Wang, Yang; Richard R. Rustandi

    2011-01-01

    The first full length IgG produced in Pichia pastoris was reported in late 1980. However, use of a wild-type Pichia expression system to produce IgGs with human-like N-linked glycans was not possible until recently. Advances in glycoengineering have enabled organisms such as Pichia to mimic human N-glycan biosynthesis and produce IgGs with human glycans on an industrial scale. Since there are only a few reports of the analytical characterization of Pichia-produced IgG, we summarize the result...

  1. IgG1 Fc N-glycan galactosylation as a biomarker for immune activation

    Science.gov (United States)

    de Jong, Sanne E.; Selman, Maurice H. J.; Adegnika, Ayola A.; Amoah, Abena S.; van Riet, Elly; Kruize, Yvonne C. M.; Raynes, John G.; Rodriguez, Alejandro; Boakye, Daniel; von Mutius, Erika; Knulst, André C.; Genuneit, Jon; Cooper, Philip J.; Hokke, Cornelis H.; Wuhrer, Manfred; Yazdanbakhsh, Maria

    2016-01-01

    Immunoglobulin G (IgG) Fc N-glycosylation affects antibody-mediated effector functions and varies with inflammation rooted in both communicable and non-communicable diseases. Worldwide, communicable and non-communicable diseases tend to segregate geographically. Therefore, we studied whether IgG Fc N-glycosylation varies in populations with different environmental exposures in different parts of the world. IgG Fc N-glycosylation was analysed in serum/plasma of 700 school-age children from different communities of Gabon, Ghana, Ecuador, the Netherlands and Germany. IgG1 galactosylation levels were generally higher in more affluent countries and in more urban communities. High IgG1 galactosylation levels correlated with low total IgE levels, low C-reactive protein levels and low prevalence of parasitic infections. Linear mixed modelling showed that only positivity for parasitic infections was a significant predictor of reduced IgG1 galactosylation levels. That IgG1 galactosylation is a predictor of immune activation is supported by the observation that asthmatic children seemed to have reduced IgG1 galactosylation levels as well. This indicates that IgG1 galactosylation levels could be used as a biomarker for immune activation of populations, providing a valuable tool for studies examining the epidemiological transition from communicable to non-communicable diseases. PMID:27306703

  2. Are Classification Criteria for IgG4-RD Now Possible? The Concept of IgG4-Related Disease and Proposal of Comprehensive Diagnostic Criteria in Japan

    OpenAIRE

    Hisanori Umehara; Kazuichi Okazaki

    2012-01-01

    Recent studies suggest simultaneous or metachronous lesions in multiorgans characterized by elevated serum levels of IgG4 and abundant infiltration of IgG4-positive plasma cells with various degrees of fibrosis. Two Japanese research committees for IgG4-RD, one from fibrosclerosis (Okazaki team) and the other from lymph proliferation (Umehara team) supported by the “Research Program for Intractable Disease” of the Ministry of Health, Labor, and Welfare of Japan, have agreed with the unified n...

  3. Purification of rabbit IgG, obtention of sheep anti rabbit IgG and their use in radioimmunoassay of avian leukosis virus p15

    Energy Technology Data Exchange (ETDEWEB)

    Higuchi, Tomoko; Ogata, Hiroe; Veiga, Silvio Sanches; Nogueira, Zelia Maria [Instituto de Quimica, Sao Paulo, SP (Brazil); Souza Felippe, Julia Maria Martins de [Instituto Adolfo Lutz, Sao Paulo, SP (Brazil). Div. de Virus

    1988-01-01

    Immunoglobulin from rabbit serum was purified by ammonium sulphate precipitation followed by chromatography on DEA-cellulose and gel filtration in Sephadex G-200. The efficiency of all steps was followed by protein determination and profiles in sodium dodecyl-sulphate polyacrylamide gel electrophoresis. Sheeps were immunized with purified IgG. The deep anti-rabbit IgG titre was evaluated by double immuno diffusion gel plates. The system rabbit serum vs sheep anti-rabbit IgG serum was used as precipitating system in radioimmunoassay of the retrovirus immunogens, in this case, p15 of avian leukosis virus. (author). 19 refs., 4 figs., 3 tabs.

  4. Purification of rabbit IgG, obtention of sheep anti rabbit IgG and their use in radioimmunoassay of avian leukosis virus p15

    International Nuclear Information System (INIS)

    Immunoglobulin from rabbit serum was purified by ammonium sulphate precipitation followed by chromatography on DEA-cellulose and gel filtration in Sephadex G-200. The efficiency of all steps was followed by protein determination and profiles in sodium dodecyl-sulphate polyacrylamide gel electrophoresis. Sheeps were immunized with purified IgG. The deep anti-rabbit IgG titre was evaluated by double immuno diffusion gel plates. The system rabbit serum vs sheep anti-rabbit IgG serum was used as precipitating system in radioimmunoassay of the retrovirus immunogens, in this case, p15 of avian leukosis virus. (author). 19 refs., 4 figs., 3 tabs

  5. Pros y contras de la creación del Hospital contra el Cáncer en Costa Rica

    Directory of Open Access Journals (Sweden)

    Grettel Carolina Alfaro Campo

    2004-03-01

    Full Text Available La relevancia que representa para el país la creación del hospital oncológico es controversial, porque se ha recibido amplia cobertura de los noticieros, donde se han hecho muy importantes denuncias, y parte de las poblaciones estudiadas para este trabajo, están en contra de este proyecto, 25 % de los médicos no le encuentra el beneficio directo. En cuanto a quien debería manejar dicho hospital, ambas poblaciones (medicas y civiles concordaron que la CCSS es el organismo que debe encargarse del manejo. Al ICCC ( Instituto Costarricense Contra el Cáncer se le ha relacionado solamente con la construcción del edificio del hospital que atienda el cáncer, pero la ley 7765 lo establece como órgano encargado de la investigación, capacitación, prevención y tratamiento de esta enfermedad, por lo que es necesario llevar a cabo un análisis financiero de costos que dé a conocer cuáles serían los beneficios y qué cambios implicaría la creación de un hospital oncológico, pero para que las cosas funcionen en orden, la transparencia y la comunicación se vuelven imprescindibles. A pesar de todo, es probable que la creación de este centro especializado en cáncer implique una diferencia significativa en la situación de salud del paciente con cáncer en nuestro país.The relevance that represents to the country the creation of the oncological hospital is controversial, because it has received a wide coverage by the news, where important denounces have been made, and part of the populations studied for this essay are against this project, 25 % of the medical doctors do not find a direct benefit. As to who has to lead the project, both populations (medical and civilian agree that the CCSS has to lead it. The ICCC (Costa Rican Institute Against Cancer has been associated with the construction of the facilities of the hospital that give attendance, but the law 7765 establishes it like the organism in charge of the investigation, capacitating

  6. Desarrollo de vacunas contra el virus de la inmunodeficiencia humana tipo 1: Relevancia de la inmunidad celular contra subtipos

    Directory of Open Access Journals (Sweden)

    Ana María Rodríguez

    2010-12-01

    Full Text Available Han pasado casi 30 años de la detección de los primeros casos de infección con HIV-1 y aún no se ha conseguido desarrollar una vacuna efectiva y segura. A pesar del impacto positivo sobre la pandemia que se ha conseguido gracias a los avances en la terapia antirretroviral (TARV, el HIV/sida sigue constituyendo un grave problema para la salud pública, especialmente en los países en desarrollo, donde es difícil el acceso al tratamiento. En el mundo, 33 millones de personas viven con el virus del sida, mientras que en la Argentina se calcula que habría unos 120 000 infectados. Uno de los desafíos para lograr una vacuna contra el HIV es la variabilidad viral. El grupo M, responsable de la pandemia, se encuentra dividido en 10 subtipos y varios sub-subtipos, además de las 48 formas recombinantes circulantes y más de cien formas recombinantes únicas. La epidemia de HIV en nuestro país es tan compleja como en el resto del mundo, con la co-circulación principalmente de virus pertenecientes al subtipo B y recombinantes BF (CRF12_BF y derivadas. A pesar de la cantidad de trabajos dedicados a la caracterización de la respuesta inmune y al desarrollo de vacunas, no queda claro cuál es el impacto de la variabilidad en la elección del antígeno. Trabajos realizados en nuestro laboratorio demuestran el papel que juega la inmunidad celular con respecto a las variantes recombinantes BF, tanto en humanos como en modelos animales. Estos resultados son de importancia en el desarrollo de futuras vacunas para nuestra región.

  7. Produção e caracterização de anticorpos monoclonais contra toxina épsilon de Clostridium perfringens Tipo D Production and characterization of monoclonal antibodies against Clostridium perfringens Type D epsilon toxin

    Directory of Open Access Journals (Sweden)

    Theonys Diógenes Freitas

    2009-02-01

    Full Text Available Clostridium perfringens tipo D é o agente etiológico da enterotoxemia em ruminantes, causada pela toxina épsilon e caracterizada por edema cardíaco, pulmonar, renal e cerebral. Anticorpos monoclonais contra toxina épsilon de C. perfringens tipo D foram produzidos a partir da fusão da linhagen de mieloma P3-X63-Ag8 653 com células do baço de camundongos Balb/c imunizados com o toxóide épsilon. Seis linhagens de híbridos secretores de anticorpos monoclonais das classes e IgM e IgG foram estabelecidas.Clostridium perfringens type D is the aetiological agent of enterotoxemia in ruminants. The disease is caused by epsilon toxin characterized by cardiac, pulmonary, kidney and brain edema. Monoclonal antibodies were produced by using myeloma cell line P3-X63-Ag8 653 fused with spleen cells from Balb/c mice, immunized with epsilon toxoid of C. perfringens type D. Six hybrids were established secreting monoclonal antibodies of the IgM class and IgG3 subclass.

  8. Urticaria crónica con alteraciones de la función tiroidea y anticuerpos antiperoxidasa tiroidea Chronic urticaria with alterations of the thyroid function and thyroid peroxidase antibodies

    Directory of Open Access Journals (Sweden)

    Diego S. Fernández Romero

    2005-06-01

    Full Text Available La urticaria crónica es una enfermedad frecuente, caracterizada por la presencia de ronchas y/o angioedema con una duración superior a las 6 semanas. En un número importante de pacientes se comporta como una enfermedad autoinmune asociada frecuentemente con alteraciones en la función tiroidea y con la presencia de anticuerpos antitiroideos. Presentamos una serie de 70 pacientes consecutivos con diagnóstico de urticaria crónica a los cuales les investigamos la función tiroidea y la presencia de anticuerpos antiperoxidasa tiroidea. Siete (10% tenían diagnóstico de enfermedad tiroidea previa al momento de la consulta. A los 63 pacientes restantes se les estudió los niveles de tirotrofina sérica, 11 de los cuales (17% presentaron valores anormales, que sumados a los 7 con enfermedad previa llegan a 18 (26% con función tiroidea alterada. A 61 pacientes se les investigó anticuerpos antiperoxidasa tiroidea, 22 (36% fueron positivos. De 57 pacientes sin diagnóstico de patología tiroidea previa al momento de la consulta por urticaria, a los que se les estudió tanto los niveles de tirotrofina sérica como la presencia de anticuerpos antiperoxidasa tiroidea, 24 (42% presentaron alguno de los estudios alterados. El alto porcentaje de alteraciones tiroideas en nuestra serie de pacientes resalta la necesidad de estudiar la función tiroidea y la presencia de anticuerpos antiperoxidasa tiroidea en pacientes con urticaria crónica.Chronic urticaria is a frequent pathology, characterized by the presence of hives and/or angioedema lasting longer than 6 weeks. In an important number of patients it behaves as an autoimmune illness, frequently associated with alterations in thyroid function and thyroid antibodies. We herein describe a consecutive series of 70 patients with a diagnosis of chronic urticaria. Seven (10% had a diagnosis of thyroid illness previous to their first consultation. Thyroid function and thyroid antibodies were studied in the

  9. Maus tratos contra crianças e adolescents Malos tratos contra niños y adolescentes Maltreatmens against children and teenagers

    Directory of Open Access Journals (Sweden)

    Christine Baccarat de Godoy Martins

    2010-08-01

    Full Text Available Os maus-tratos contra a criança e o adolescente têm sido reconhecidos como um fenômeno crescente no mundo, mas cujo conhecimento ainda está em processo de construção em função de sua complexidade. O estudo apresenta uma revisão bibliográfica, cujo objetivo foi conhecer e divulgar os dados epidemiológicos acerca da violência praticada contra menores, bem como discutir o conhecimento da magnitude desses eventos, os fatores relacionados e as consequências para as vítimas. A literatura aponta para a abrangência e magnitude da violência praticada contra crianças e adolescentes e enfatiza a importância de se conhecer a natureza e a realidade acerca destes eventos a fim de se formar um diagnóstico que auxilie na elaboração e implantação de estratégias de prevenção e intervenção.Los malos tratos contra niños y adolescentes están recibiendo cada vez más atención debido a su creciente e inquietante papel en la morbimortalidad en diferentes partes del mundo. El estudio tuvo como objetivo presentar una revisión bibliográfica de los datos epidemiologicos acerca de la violencia contra niños y adolescentes, discutir la magnitud, factores relacionados e consecuencias para la víctimas. La literatura apunta para la magnitud de la violencia contra niños y adolescentes e enfatizan, aún, la importancia de conocer la naturaleza y la realidad acerca de los eventos a fin de formar un diagnóstico que dé auxilio en la elaboración e implantación de estrategias específicas de prevención e intervención.The maltreatments against children and adolescents are admitted as a crescent phenomenon in world, but its knowledge are in building process due to its complexity. This study show a revising the literature with aims know and publicise epidemiological data about the violence against children and adolescents, discuss the knowledge about magnitude of this violence, the related factors and the consequences for victims. The literature

  10. Contactin-1 IgG4 antibodies cause paranode dismantling and conduction defects.

    Science.gov (United States)

    Manso, Constance; Querol, Luis; Mekaouche, Mourad; Illa, Isabel; Devaux, Jérôme J

    2016-06-01

    Paranodal axoglial junctions formed by the association of contactin-1, contactin-associated protein 1, and neurofascin-155, play important functions in nerve impulse propagation along myelinated axons. Autoantibodies to contactin-1 and neurofascin-155 define chronic inflammatory demyelinating polyradiculoneuropathy subsets of patients with specific clinical features. These autoantibodies are mostly of the IgG4 isotype, but their pathogenicity has not been proven. Here, we investigated the mechanisms how IgG subclasses to contactin-1 affect conduction. We show that purified anti-contactin-1 IgG1 and IgG4 bind to paranodes. To determine whether these isotypes can pass the paranodal barrier, we incubated isolated sciatic nerves with the purified antibody or performed intraneural injections. We found that IgG4 diffused into the paranodal regions in vitro or after intraneural injections. IgG4 infiltration was slow and progressive. In 24 h, IgG4 accessed the paranode borders near the nodal lumen, and completely fill the paranodal segments by 3 days. By contrast, control IgG, anti-contactin-1 IgG1, or even anti-contactin-associated-protein-2 IgG4 did not pass the paranodal barrier. To determine whether chronic exposure to these antibodies is pathogenic, we passively transferred anti-contactin-1 IgG1 and IgG4 into Lewis rats immunized with P2 peptide. IgG4 to contactin-1, but not IgG1, induced progressive clinical deteriorations combined with gait ataxia. No demyelination, axonal degeneration, or immune infiltration were observed. Instead, these animals presented a selective loss of the paranodal specialization in motor neurons characterized by the disappearance of the contactin-associated protein 1/contactin-1/neurofascin-155 complex at paranodes. Paranode destruction did not affect nodal specialization, but resulted in a moderate node lengthening. The sensory nerves and dorsal root ganglion were not affected in these animals. Electrophysiological examination further

  11. IgG subclass deficiency and sinopulmonary bacterial infections in patients with alcoholic liver disease.

    Science.gov (United States)

    Spinozzi, F; Cimignoli, E; Gerli, R; Agea, E; Bertotto, A; Rondoni, F; Grignani, F

    1992-01-01

    Abnormalities in IgG subclass distribution were sought in serum samples and bronchoalveolar lavage fluid from 15 patients with alcoholic liver disease to explain their increased susceptibility to bacterial respiratory infections. Serum IgG4 deficiency alone or in association with low IgG2 levels was revealed in approximately 30% of patients with alcoholic liver disease. This fact prompted us to further investigate the immunoglobulin concentrations in broncho-alveolar lavage fluid, paying special attention to the distribution of IgA and IgG subclasses. IgA levels were found to be normal or slightly elevated. However, there were substantial defects in total IgG and IgG1 concentrations, often associated with reduced IgG2 and IgG4 levels, in approximately 70% of patients with alcoholic liver disease, which proved to be closely correlated with the number and type (pneumonia) of bacterial respiratory infections. A prospective study of intravenous immunoglobulin substitutive therapy involving two patients with recurrent pneumonia and very low serum IgG2 values demonstrated a reduction in the number of respiratory infectious episodes as well as an increase in both serum and, to a lesser extent, bronchoalveolar lavage fluid IgG1 and IgG2 levels. We identified immune defects that may represent an important pathogenetic mechanism that, when considered together with the alcohol-related suppression of alveolar macrophage and ciliary functions and the inhibition of leukocyte migration into the lungs, should help clarify the complex relationships between alcohol and immune defense. PMID:1728935

  12. The blocking activity of birch pollen-specific immunotherapy-induced IgG4 is not qualitatively superior to that of other IgG subclasses

    DEFF Research Database (Denmark)

    Ejrnaes, Anne M; Bødtger, Uffe; Larsen, Jørgen N; Svenson, Morten

    2004-01-01

    for the clinical efficacy of SIT. In this study, fractionated serum samples from 14 SIT-treated birch pollen allergic individuals enabled determination of the inhibitory capacity of IgG4 alone versus non-IgG4 IgG. Allergen-binding activities of IgG and the IgG-mediated inhibition of allergen binding...... to autologous IgE were detected using 125I-labelled rBet v 1.2801, a recombinant variant of the major allergen of Betula verrucosa pollen. Results show that IgG4-depletion resulted in equivalent reductions in binding and blocking activities. In contrast, a significant but less than two-fold higher...

  13. Thomas Mann: um escritor contra o nazismo Thomas Mann: a writer against nazism

    OpenAIRE

    Sonia Dayan-Herzbrun

    1997-01-01

    O combate que Thomas Mann travou contra o nazismo a partir de 1922 é exemplar, pois é o de um escritor apaixonado pela liberdade e não o de um militante. Ele privilegia a ficção e o mito como meios de luta contra o fascínio exercido pelo nazismo e afirma a permanência de uma Alemanha cultural, cosmopolita, fonte de uma universalidade estranha a todos os particularismos étnicos. Goethe, com quem ele se identifica e no qual se projeta, é a figura de proa dessa Alemanha.Thomas Mann's attack, fro...

  14. Tipología de agresores contra la pareja en prisión

    OpenAIRE

    Loinaz Calvo, Ismael; Echeburúa Odriozola, Enrique; Torrúbia, Rafael

    2010-01-01

    Los agresores contra la pareja no constituyen un grupo homogéneo. Numerosos estudios en el ámbito anglosajón avalan la posibilidad de diferenciar distintos subtipos de agresores, pero hay divergencias entre ellos. Una de las principales aplicaciones de las tipologías es la adecuación de los tratamientos a las características del sujeto. El presente estudio-piloto tiene como objetivo establecer empíricamente una tipología de agresores contra la pareja en un ámbito español. La muestra constó de...

  15. Efectividad del tratamiento de la violencia contra la pareja en pacientes drogodependientes

    OpenAIRE

    Javier Fernández-Montalvo; Alfonso Arteaga Olleta; José J. López-Goñi

    2015-01-01

    En este artículo se analiza la efectividad de los programas de tratamiento psicológico para drogodependientes, que presentan conductas violentas contra la pareja. Para ello, se revisan, en primer lugar, los estudios que valoran la influencia del tratamiento habitual sobre las adicciones y la reducción de las conductas violentas contra la pareja. En segundo lugar, se analizan los resultados de los programas de intervención conjunta que se han desarrollado hasta la fecha, en el ámbito inter...

  16. Factores asociados a la violencia contra la pareja en población penitenciaria

    OpenAIRE

    García Jiménez, Jesús Javier

    2015-01-01

    La presente tesis doctoral es un compendio de tres estudios que exploran factores de riesgo en violencia contra la pareja (VCP) en población penitenciaria, diferenciados según el delito por el que cumplen condena: violencia contra la pareja y delincuencia común (robo y/o tráfico de drogas). Estos estudios se basan en factores generales en delincuencia, y específicos en VCP, siguiendo los modelos de Stith, Smith, Penn, Ward, y Tritt (2004) y Capildi, Knoble, Shortt, y Kim (2012), con el objeti...

  17. Vacinas contra o Papilomavirus humano Vaccines against human Papillomavirus

    Directory of Open Access Journals (Sweden)

    Sidney Roberto Nadal

    2006-09-01

    Full Text Available Infecção pelo HPV é mais comum entre indivíduos jovens e sexualmente ativos e é tão prevalente que 75 a 80% da população será infectada durante sua vida. A maioria das lesões cede espontaneamente ao ponto de não ser detectada nem com os métodos mais sensíveis. Preocupam as infecções persistentes com os HPV oncogênicos, que aumentam o risco da neoplasia intraepitelial e do câncer. Duas formas de prevenção foram propostas: o rastreamento das lesões precursoras e a imunização contra o HPV, para evitá-las. Embora a incidência do câncer genital venha diminuindo devido aos métodos de rastreamento, seu custo é elevado e os resultados anormais provocam significantes distúrbios emocionais. Logo, a prevenção das doenças relacionadas ao vírus deveria ser disponível sob a forma de vacinação. Na década passada, iniciaram-se os testes clínicos com várias vacinas que tinham como alvo os tipos comuns do HPV. As vacinas profiláticas evitam a infecção pelo HPV e suas doenças associadas e as terapêuticas induzem a regressão das lesões pré-cancerosas e a remissão do câncer invasivo. As primeiras são compostas pela proteína capsídeo L1 do HPV que se auto-reproduz em partículas virus-like (VLP quando expressa em sistemas recombinantes, induzindo forte resposta humoral com anticorpos neutralizadores. Determinam 100% de proteção contra a infecção pelos tipos específicos do HPV e impedem o aparecimento de neoplasias intraepiteliais de alto grau até pelo menos 5 anos após a imunização. A eficácia das vacinas feitas com as proteínas E6 e E7 também vem sendo pesquisada em modelos animais. As vacinas vêm mostrando maior efetividade quando administradas antes do início da atividade sexual e as campanhas de vacinação deverão ter como alvo as mulheres adolescentes e as pré-adolescentes. Espera-se, com o uso disseminado da vacina, que 70% dos cânceres cervicais sejam evitados, bem como a proporção das

  18. A Monosaccharide Residue Is Sufficient to Maintain Mouse and Human IgG Subclass Activity and Directs IgG Effector Functions to Cellular Fc Receptors

    Directory of Open Access Journals (Sweden)

    Daniela Kao

    2015-12-01

    Full Text Available Immunoglobulin G (IgG glycosylation modulates antibody activity and represents a major source of heterogeneity within antibody preparations. Depending on their glycosylation pattern, individual IgG glycovariants present in recombinant antibody preparations may trigger effects ranging from enhanced pro-inflammatory activity to increased anti-inflammatory activity. In contrast, reduction of IgG glycosylation beyond the central mannose core is generally believed to result in impaired IgG activity. However, this study reveals that a mono- or disaccharide structure consisting of one N-acetylglucosamine with or without a branching fucose residue is sufficient to retain the activity of the most active human and mouse IgG subclasses in vivo and further directs antibody activity to cellular Fcγ receptors. Notably, the activity of minimally glycosylated antibodies is not predicted by in vitro assays based on a monomeric antibody-Fcγ-receptor interaction analysis, whereas in vitro assay systems using immune complexes are more suitable to predict IgG activity in vivo.

  19. IgG subclass and light chain distribution of anticardiolipin and anti-DNA antibodies in systemic lupus erythematosus.

    OpenAIRE

    Gharavi, A E; Harris, E N; Lockshin, M D; Hughes, G R; Elkon, K B

    1988-01-01

    The IgG subclass and light chain distribution of anticardiolipin and anti-DNA antibodies were determined in serum samples from patients with systemic lupus erythematosus. With an enzyme linked immunosorbent assay (ELISA) and mouse monoclonal antibodies to individual subclasses, significant differences in the distributions of IgG2, IgG3, and IgG4 subclasses were observed between anticardiolipin and anti-DNA antibodies. Whereas anti-DNA antibodies were predominantly IgG1 and IgG3, all subclasse...

  20. Is IgG4-Related Disease a Cause of Xerostomia? A Cohort Study of 60 Patients

    OpenAIRE

    Hermet, M.; M. André; J. L. Kémény; Le Guenno, G.; P. Déchelotte; G. Guettrot-Imbert; A. Tridon; I. Delèvaux; Soubrier, M; O. Aumaître

    2012-01-01

    Objective. Immunoglobulin-G4-(IgG4-) related disease (IgG4 RD) is a fibrosing process characterized by a significant infiltration of IgG4-secreting plasma cells. IgG4 RD can affect almost all organs including salivary glands. Whether IgG4 RD plays a role in the development of sicca syndrome and particularly dry mouth syndrome remains to be investigated. Methods. We conducted a monocentric cohort study for two years to search for IgG4 RD features in patients with dry mouth syndrome using immun...

  1. IgG4-related disease and its pathogenesis—cross-talk between innate and acquired immunity

    OpenAIRE

    Umehara, Hisanori; Nakajima, Akio; Nakamura, Takuji; Kawanami, Takafumi; Tanaka, Masao; Dong, Lingli; Kawano, Mitsuhiro

    2014-01-01

    IgG4-related disease (IgG4-RD) is a novel clinical entity proposed in Japan in the 21th century and is attracting strong attention over the world. The characteristic manifestations of IgG4-RD are increased serum IgG4 concentration and tumefaction by IgG4+ plasma cells. Although the clinical manifestations in various organs have been established, the pathogenesis of IgG4-RD is still unknown. Recently, many reports of aberrant acquired immunity such as Th2-diminated immune responses have been p...

  2. Rethinking Ormond’s Disease: “Idiopathic” Retroperitoneal Fibrosis in the Era of IgG4-Related Disease

    OpenAIRE

    Khosroshahi, Arezou; Carruthers, Mollie N.; John H. Stone; Shinagare, Shweta; Sainani, Nisha; Hasserjian, Robert P.; Deshpande, Vikram

    2013-01-01

    Abstract Idiopathic retroperitoneal fibrosis (RPF) is a periaortic sclerotic disease that encases adjacent retroperitoneal structures, particularly the ureters. A subset of idiopathic RPF cases can be associated with IgG4-related disease, but the frequency of this association is not clear. We selected 23 cases of idiopathic RPF and identified IgG4-related RPF cases based on the presence of IgG4+ plasma cells in the tissue, using an IgG4/IgG ratio cutoff of >40%. We then compared the IgG4-rela...

  3. Antibody isotypes, including IgG subclasses, in Ecuadorian patients with pulmonary Paragonimiasis

    Directory of Open Access Journals (Sweden)

    Angel Guevara E.

    1995-08-01

    Full Text Available An ELISA test was developed to detect Paragonimus-specific antibodies, including IgG subclasses, using P. mexicanus crude water-soluble antigens. The test was standardized to detect antibodies in sera of Ecuadorian patients with pulmonary paragonimiasis and negative controls from the endemic area. The detected mean levels of IgG (0.753, SEM: 0.074 and IgM (0.303, SEM: 0.033 were significantly elevated (P<0.05. Within the IgG subclasses, IgG4 showed the highest detected mean level (0.365, SEM: 0.116 and the other three subclasses showed considerably lower mean levels (IgG1, 0.186 SEM: 0.06; IgG2, 0.046 SEM: 0.01; IgG3, 0.123 SEM: 0.047. The number of P. mexicanus eggs found in sputum of infected individuals showed a positive correlation with the level of antibodies detected for IgM, IgG and its subclasses (P<0.001. The relevance of these findings in Ecuadorian patients suffering from pulmonary paragonimiasis is discussed.

  4. IgG4 related renal disease: A wolf in sheep's clothing

    OpenAIRE

    Rohan, A.; Ravishankar, B.; Vishwanath, S; Vankalakunti, M.; Kishore, B.; Ballal, H. S.

    2014-01-01

    IgG4 related disease is a fibro-inflammatory condition with involvement of renal and extra renal organs, characterized by lymphoplasmacytic infiltration with organ dysfunction. We describe three cases of IgG4 related renal disease from a tertiary care hospital in south India.

  5. The first case of IgG4-related disease in Italy

    OpenAIRE

    Rolla, Davide; Bellino, Diego; Peloso, Giancarlo; Pia Rastaldi, Maria; Simonini, Paola; Louis Ravetti, Jean

    2013-01-01

    Background:Recently, Mikulicz’s disease has been defined as an IgG-4 related disease, a systemic condition, where the hallmark pathology findings are lymphoplasmacytic infiltrates, immunoglobulin (Ig)G4-positive plasma cells, modest tissue eosinophilia, and intense fibrosis.

  6. Salivary IgG assay to detect Helicobacter pylori infection in an Indian adult population

    Directory of Open Access Journals (Sweden)

    Ramya Thirumala Krishnaswamy

    2012-01-01

    Conclusion: EIAgen H. pylori IgG assay is a noninvasive, moderately accurate, and sensitive method for the detection of H. pylori infection in saliva. Salivary anti H. pylori IgG test prior to endoscopy is a useful screening test for seroepidemiological studies.

  7. Intrathecal IgG synthesis and autoantibody-secreting cells in multiple sclerosis

    DEFF Research Database (Denmark)

    Sellebjerg, Finn; Jensen, Claus V; Christiansen, Michael

    We studied intrathecal IgG synthesis and autoantibody-secreting cells in 148 patients with possible onset symptoms of MS (POSMS) or clinically definite MS (CDMS). In POSMS intrathecal synthesis of IgG oligoclonal bands and abnormalities on T2-weighted magnetic resonance imaging were associated bu...

  8. Protease inhibitors decrease IgG shedding from Staphylococcus aureus, increasing complement activation and phagocytosis efficiency.

    Science.gov (United States)

    Fernandez Falcon, Maria F; Echague, Charlene G; Hair, Pamela S; Nyalwidhe, Julius O; Cunnion, Kenji M

    2011-10-01

    Staphylococcus aureus is a major pathogen for immunologically intact humans and its pathogenesis is a model system for evasion of host defences. Antibodies and complement are essential elements of the humoral immune system for prevention and control of S. aureus infections. The specific hypothesis for the proposed research is that S. aureus modifies humoral host defences by cleaving IgG that has bound to the bacterial surface, thereby inhibiting opsonophagocytosis. S. aureus was coated with pooled, purified human IgG and assayed for the shedding of cleaved IgG fragments using ELISA and Western blot analysis. Surface-bound IgG was shed efficiently from S. aureus in the absence of host blood proteins. Broad-spectrum protease inhibitors prevented cleavage of IgG from the S. aureus surface, suggesting that staphylococcal proteases are responsible for IgG cleavage. Serine protease inhibitors and cysteine protease inhibitors decreased the cleavage of surface-bound IgG; however, a metalloprotease inhibitor had no effect. Using protease inhibitors to prevent the cleavage of surface-bound IgG increased the binding of complement C3 fragments on the surface of S. aureus, increased the association with human neutrophils and increased phagocytosis by human neutrophils. PMID:21636671

  9. Peroxynitrite-induced structural perturbations in human IgG: A physicochemical study.

    Science.gov (United States)

    Arfat, Mir Yasir; Arif, Zarina; Chaturvedi, Sumit Kumar; Moinuddin; Alam, Khursheed

    2016-08-01

    IgG is an important defence protein. To exhibit optimum function the molecule must maintain its native structure. Peroxynitrite is a potent oxidizing and nitrating agent produced in vivo under pathophysiological conditions. It can oxidize and/or nitrate various amino acids causing changes in the structure and function of proteins. Such proteins may be involved in the pathogenesis of many inflammatory diseases, including rheumatoid arthritis. In the present work, peroxynitrite-induced structural changes in IgG have been studied by UV-visible, fluorescence, CD, FT-IR, DLS spectroscopy and DSC as well as by SDS-PAGE. Peroxynitrite-modified IgG exhibited hyperchromicity at 280 nm, quenching of tryptophan fluorescence, increase in ANS fluorescence, loss of β-sheet, shift in the positions of amide I and amide II bands, appearance of new peak in FT-IR, attachment of nitro residues and increase in melting temperature, compared to native IgG. Furthermore, peroxynitrite-modified IgG exhibited an additional peak at 420 nm, quenching in tyrosine fluorescence and enhancement in dityrosine fluorescence compared to native IgG. Generation of nitrotyrosine, dityrosine and nitrotryptophan was also observed in peroxynitrite-modified IgG. Gross structural changes in IgG caused by peroxynitrite and observed in vitro may favour autoantibodies induction in vivo under similar conditions. PMID:27210739

  10. Enhanced HIV-1 neutralization by a CD4-VH3-IgG1 fusion protein

    International Nuclear Information System (INIS)

    HIV-1 gp120 is an alleged B cell superantigen, binding certain VH3+ human antibodies. We reasoned that a CD4-VH3 fusion protein could possess higher affinity for gp120 and improved HIV-1 inhibitory capacity. To test this we produced several human IgG1 immunoligands harboring VH3. Unlike VH3-IgG1 or VH3-CD4-IgG1, CD4-VH3-IgG1 bound gp120 considerably stronger than CD4-IgG1. CD4-VH3-IgG1 exhibited ∼1.5-2.5-fold increase in neutralization of two T-cell laboratory-adapted strains when compared to CD4-IgG1. CD4-VH3-IgG1 improved neutralization of 7/10 clade B primary isolates or pseudoviruses, exceeding 20-fold for JR-FL and 13-fold for Ba-L. It enhanced neutralization of 4/8 clade C viruses, and had negligible effect on 1/4 clade A pseudoviruses. We attribute this improvement to possible pairing of VH3 with CD4 D1 and stabilization of an Ig Fv-like structure, rather than to superantigen interactions. These novel findings support the current notion that CD4 fusion proteins can act as better HIV-1 entry inhibitors with potential clinical implications.

  11. Experiences in the measurement of RBC-bound IgG as markers of cell age.

    Science.gov (United States)

    Paleari, Renata; Ceriotti, Ferruccio; Azzario, Franco; Maccioni, Liliana; Galanello, Renzo; Mosca, Andrea

    2004-05-01

    An immunologically mediated pathway has been largely accepted to be one of the mechanisms involved in the clearance of senescent or prematurely damaged RBC. According to this pathway, RBC removal is mediated by binding of naturally occurring IgG to clustered integral membrane proteins, followed by complement deposition. The validation of an immunoenzymatic method for the detection of RBC-bound autologous IgG is presented. The use of RBC-bound IgG as an index related to red cell age was evaluated by measuring IgG binding in RBC treated with the clustering agent ZnCl2, in density fractionated RBC and in a selected group of patients expected to have an altered RBC life span. The immunoenzymatic method for IgG detection resulted to be reproducible (CV = 3.4%). IgG binding to in vitro clustered RBC was found to be enhanced to a very great extent, about 20 times higher with respect to untreated RBC. A slight but significant increase (about 1.8-fold) in membrane-bound IgG was observed in the highest density fraction of normal RBC, which constituted 1% of the total cells. A significantly greater number of RBC-bound IgG was measured in splenectomized beta-thalassemia intermedia patients and in subjects with secondary decreases in the C3 complement fraction concentration. PMID:15039023

  12. Low avidity IgG antibodies in diagnosis of recent human schistosomiasis.

    Science.gov (United States)

    Mostafa, Nahed E; Awad, Adel; Shalaby, Mohsen

    2002-12-01

    One hundred thirty school children from a schistosomiasis endemic area in Sharkia Governorate, were selected on parasitological findings. Seventy persons were negative on the first screen and turned positive after 3 months of the screening (recently infected). Stool examination, ELISA (IgG & IgM), low avid IgG, and circulating antigens were performed for all patients and controls. ELISA detected IgM in all cases. IgG and circulating antigens in 90% of schistosomiasis patients. Low avidity IgG were detected in 85.71% of recent cases. The specificity of ELISA appeared to be >99%. The IgM/IgG ratio was >1 in patients with recent infection. The percentage of fall of O.D. readings of IgG after addition of 6 molar urea was high among cases with recent infection. Low avid lgG appears to be good and valuable in diagnosis of recent schistosomiasis in man. PMID:12512829

  13. Characteristics, diagnosis and therapeutic strategies for IgG4-related orbital disease.

    Science.gov (United States)

    Oles, Krzysztof; Sładzień, Jacek; Bartuś, Krzysztof; Leszczyńska, Joanna; Bojanowska, Emila; Krakowczyk, Łukasz; Mika, Joanna

    2016-06-01

    Thanks to detailed studies conducted in recent years, a new disease syndrome was identified in 2001. It is known as a IgG4-related disease and its differentiation is based on the analysis of IgG4 levels in the affected tissues. The IgG4-related disease is considered to be a generalized pathological process involving a wide spectrum of various disorders that may affect distant organs. Orbital IgG4-related disease is a recently reported issue that may prove important for the elucidation of the etiology of idiopathic, lymphoplasmacytic or fibrotic disorders of various organs, including the orbits. In this article, we are describing epidemiology and differential diagnostics of IgG4-related orbital disease with particular focus on pseudotumors, MALT lymphomas and lymphocyte/plasma cell infiltrations of the orbit. We are also discussing therapeutic possibilities currently available in the management of the disease. PMID:27116895

  14. A case of refractory IgG4-related peripheral neuropathy with severe axonal damage.

    Science.gov (United States)

    Suzuki, Yu; Shiraishi, Makoto; Yamada, Koji; Doi, Masatomo; Kato, Masayuki; Hasegawa, Yasuhiro

    2016-05-31

    A 78-year-old man presented complaining of tingling and pain. Neurological examination revealed dysesthesia and hypothermesthesia below both knees and areflexia in the lower extremities. Laboratory data revealed elevated serum levels of immunoglobulin IgG4 and para-aortic, and mesenteric lymphadenopathy was evident on plain computed tomography of the abdomen. Microscopic findings of a bone marrow biopsy specimen showed occlusion of blood vessels with IgG4-positive plasma cells. IgG4-related disease was diagnosed because the bone marrow biopsy exhibited > 10 IgG4-positive plasma cells per high-power field. Treatment was initiated with prednisolone starting at 30 mg/day, but no improvement in neurological symptoms was achieved. Sural nerve biopsy demonstrated obstructive thromboangiitis with severe loss of myelin and axons. Further investigations are needed to elucidate the relationship between obstructive thromboangiitis and steroid-resistant IgG4-related peripheral neuropathy. PMID:27098901

  15. IgG Adhesion on Hydrophobic Surfaces: Theory, Modelling, and Application to ELISA

    CERN Document Server

    de Thier, P

    2016-01-01

    Enzyme-Linked ImmunoSorbent Assays (ELISA) are a range of widely used analytical methods whose implementation requires to build antibodies (IgG) thin films onto surfaces predominantly made of polystyrene. The high hydrophobicity of polystyrene ensures a spontaneous and strong adhesion of proteins allowing to easily build IgG monolayers. Since the ELISA improvements definitely lie in the comprehension of physico-chemical mechanisms on which IgG immobilization on hydrophobic surfaces are relied, this work develops a theorization essay (thermodynamics of the so-called hydrophobic effect and of thin films building) emphasized by numerical modelling (random sequential additions model, i.e. RSA) and experimental estimations by atomic force microscopy (AFM) and ELISA. Keeping in mind the hydrophobic effect, thermodynamics (of irreversible processes) allows to explain why IgG adhesion on polystyrene occurs whereas numerical modelling approaches show a way of surface saturation leading to promote IgG orientations expe...

  16. The Study of IgG Subclass Profiles of Anti-HBc in Populations with Different Status of HBV Infection

    Institute of Scientific and Technical Information of China (English)

    Yu-Yen Yang; Chi-Chiang Yang; Chien-Fu Huang; James Cheng-Chung Wei; Mei-Shang Ho; Lina Wang; Shyh-Jye Lin; Wei-Yu Tsai; Chien-Chou Lin; Fangling Xu

    2005-01-01

    To study IgG subclasses for the hepatitis B virus (HBV) core antigen (anti-HBc) in different populations, a comparison was made between 104 chronic carriers (60 male and 44 female) and 434 recovered individuals (247 male and 192 female). Biochemistry analyses of AST (aspartate aminotransferase) and ALT (alanine aminotransferase) were also performed. Among the 104 chronic carriers, 21 patients were found to be ALT and AST abnormal (> 25 IU/ml). After comparing these ALT and AST abnormal patients with other ALT and AST normal chronic carriers, no statistical difference was observed in the OD values of the anti-HBe (p > 0.05). The ELISA results showed the anti-HBc IgG subclass pattern was IgG1 > IgG3 > IgG4 in chronic carriers and IgG3 > IgG1 > IgG4 in recovered individuals (p < 0.05). This result suggests the IgG1/IgG3 ratio may be related with HBV status. However, in spite of the different anti-HBc IgG1/IgG3 patterns demonstrated in different populations, both anti-HBc IgG1 and IgG3 concentrations were significantly higher in chronic carriers (p < 0.05). Therefore, both the anti-HBc IgG1/IgG3 ratio and their amounts differed. They may play a significant role in chronic carriers and recovered individuals. The anti-HBc IgG subclass profiles of chronic carriers were not changed regardless of liver inflammation, and were independent of sex and age. Cellular & Molecular Immunology.

  17. Protective role of mouse IgG1 in cryoglobulinaemia; insights from an animal model and relevance to human pathology.

    Science.gov (United States)

    Chemouny, Jonathan Maurice; Hurtado-Nedelec, Margarita; Flament, Héloïse; Ben Mkaddem, Sanae; Daugas, Eric; Vrtovsnik, François; Berthelot, Laureline; Monteiro, Renato C

    2016-08-01

    Strait et al. described a novel mouse model of cryoglobulinaemia by challenging mice deficient in the immunoglobulin (Ig)G1 subclass (γ1(-) mice) with goat anti-mouse IgD [5]. The phenotype of wild-type mice was not remarkable, whereas γ1(-) mice developed IgG3 anti-goat IgG cryoglobulins as well as severe and lethal glomerulonephritis. Renal phenotype could not be rescued in γ1(-) mice by the deletion of C3, fragment crystalline γ receptor (FcγR) or J chain. On the other hand, early injection of IgG1, IgG2a or IgG2b inhibited the pathogenic effects of IgG3 in an antigen-dependent manner even in the absence of the FcγRIIb, an anti-inflammatory receptor. The authors concluded that the pathogenic role of IgG3 and the protective characteristic of IgG1 in this model were not explained by their abilities to bind to FcRs or effector molecules but are rather due to structural discrepancies enhancing the precipitation properties/solubility of IgG3/IgG1-containing immune complexes. The present article aims to discuss the current knowledge on IgG biology and the properties of IgGs explaining their differential propensity to acquire cryoglobulin activity. PMID:26410885

  18. IgG4-related disease simulating Hodgkin lymphoma in a child

    Directory of Open Access Journals (Sweden)

    D. Eric Ewing, MD

    2016-06-01

    Full Text Available Immunoglobulin (Ig G4-related disease is a recently described syndrome characterized by mass forming lymphoplasmacytic tissue infiltration and elevated serum IgG4 concentrations usually affecting middle-aged or older individuals. Lymphadenopathy is frequently observed and is sometimes the first or only manifestation of the disease. We report a case of IgG4-related disease mimicking Hodgkin lymphoma in a 13-year-old girl. The patient presented with progressive unilateral cervical lymphadenopathy of several months duration. Biopsy showed follicular hyperplasia with progressive transformation of germinal centers. Interfollicular areas were expanded by small lymphocytes, histiocytes, eosinophils and fibrosis with occasional CD30 positive cells initially concerning for interfollicular Hodgkin lymphoma. Immunohistochemical analysis revealed an intrafollicular plasmacytosis with an IgG4-positive/IgG-positive plasma cell ratio of 50% supporting a diagnosis of IgG4-related lymphadenopathy, progressively transformed germinal centers type. Laboratory studies were supportive with elevated serum IgG4 (178 mg/dL and IgE (30.40 kU/L levels along with an elevated serum IgG4/IgG ratio (0.16. Very few cases of IgG4-related disease have been described in children. Within this age group, there is considerable clinical overlap between IgG4-related disease associated lymphadenopathy and Hodgkin lymphoma. In addition, lymphadenopathy secondary to IgG4-related disease demonstrates substantial histologic diversity with the potential to simulate the inflammatory background and fibrosis of Hodgkin lymphoma. The importance of accurate diagnosis is underscored by the prognostic implications considering the marked response of the syndrome to steroid therapy. In addition, appropriate follow up is critical to monitor for relapse and additional organ involvement.

  19. Detección de anticuerpos Anti-brucella en focas de Weddell (Leptonychotes weddellii de Cabo Shirref, Antártica Detection of anti-brucella antibodies in Weddell seals (Leptonychotes weddellii from cape Shirref, Antarctica

    Directory of Open Access Journals (Sweden)

    O. BLANK

    2002-01-01

    Full Text Available Posterior al hallazgo de anticuerpos anti-Brucella en muestras de lobo fino antártico (Arctocephalus gazella, el estudio serológico en Pinnipedia Antárticos se continuó con el fin de determinar la presencia de anticuerpos anti-Brucella en otras especies. Se colectaron muestras de sangre y de fluido extravascular de 12 ejemplares de foca de Weddell (Leptonychotes weddellii encontrados en el Sitio de Especial Interés Científico (SEIC Nº 32 y sitio CCAMLR Ecosystem Monitoring Program (CEMP N° 2, "Cabo Shirreff e Islotes San Telmo" (62º 47' S; 60º 27' W, localizado en la costa Noroeste de la isla Livingston (Shetland del Sur, Antártica. Las muestras obtenidas fueron analizadas por la técnica convencional Rosa de Bengala (RB y dos inmunoensayos enzimáticos de competencia: Compelisa®, y c-ELISA. De las muestras estudiadas se identificaron cinco con anticuerpos anti-Brucella, siendo las pruebas inmunoenzimáticas las técnicas más sensibles. Estos resultados muestran una alta probabilidad de presencia de infección por una bacteria del género Brucella en ejemplares L. weddellii y plantean la necesidad de realizar estudios complementarios, que permitan conocer la etiología y entender la epidemiología de Brucella en esta región del mundoAfter the finding of anti-Brucella antibodies in samples of Antarctic fur seal (Arctocephalus gazella, the serological study on Antarctic Pinniped was continued in order to determine the presence of anti-Brucella antibodies in other species. Blood and extra vascular fluid samples were taken from 12 Weddell seals (Leptonychotes weddellii at the Site of Special Scientific Interest (SSSI Nº 32 and CCAMLR* Ecosystem Monitoring Program (CEMP site N° 2 "Cape Shirreff and San Telmo Islets" (62º 47' S; 60º 27' W, located on the Norwest coast Livingston Island (South Shetland Islands, Antarctica. The samples were tested by the conventional Rose Bengal test (RB and two competitive enzymatic immunoassay

  20. Aspectos relevantes del uso de Mycobacterium´habana´ como candidato vacunal contra la tuberculosis

    Directory of Open Access Journals (Sweden)

    Iliana Valdés

    2011-12-01

    Full Text Available La eficacia protectora de la actual vacuna (BCG contra la tuberculosis, para contrarrestar las formas pulmonares de esta enfermedad y su reactivación, resulta variable o poco eficiente, lo cual impone la búsqueda urgente de nuevas alternativas profilácticas contra esta enfermedad. Basados en las ventajas inmunogénicas que ofrece el uso de vacunas vivas, se han encaminado diferentes estrategias de este tipo empleando mutantes auxotróficos de Mycobacterium tuberculosis , BCG recombinante o micobacterias no tuberculosas. Existen evidencias experimentales acerca de la protección conferida tras la vacunación con cepas vivas, inactivadas o fracciones proteicas de Mycobacterium'habana' TMC-5135 contra la infección por Mycobacterium tuberculosis. Esta respuesta protectora parece ir aparejada de escasos signos de virulencia en los modelos animales ensayados, lo cual coloca a M.´habana´ dentro de los posibles candidatos vacunales contra la tuberculosis al ajustarse a la condición que impone una vacuna clásica de reproducir la infección y los eventos inmunes que le suceden lo más fielmente posible a como ocurren de manera natural, sin causar extensos daños en el receptor.

  1. La imprescriptibilidad de los crímenes contra la humanidad en Uruguay

    Directory of Open Access Journals (Sweden)

    José Manuel Sánchez Patrón

    2014-06-01

    Full Text Available La ratificación del Convenio sobre la imprescriptibilidad de los crímenes de guerra y de los crímenes de lesa humanidad por parte de Uruguay, constituye un primer paso dirigido a limitar la impunidad de los partícipes en la comisión de estas infracciones internacionales. Para la consecución de esta misma finalidad, el Estado Uruguayo ha dado un segundo paso, consistente en la ratificación del Estatuto de la Corte Penal Internacional, lo que ha llevado a efecto casi un año después del anterior. Ambas decisiones demuestran la intención de Uruguay de comprometerse Internacionalmente con el fin de evitar la impunidad de los responsables de la comisión de determinadas figuras delictivas, especialmente los crímenes de guerra y los crímenes contra la humanidad, ya que en tomo a estas dos infracciones internacionales gravitan los convenios internacionales a los que nos acabamos de referir.Contenido: imprescriptibilidad de los crímenes contra la humanidad en el pasado. Imprescriptibilidad de los crímenes contra la humanidad en el presente. Imprescriptibilidad de los crímenes contra la humanidad en el futuro. Conclusiones

  2. Toxoplasma-SPECIFIC IgG SUBCLASS ANTIBODY RESPONSE IN CEREBROSPINAL FLUID SAMPLES FROM PATIENTS WITH CEREBRAL TOXOPLASMOSIS

    Directory of Open Access Journals (Sweden)

    Fernanda S. NASCIMENTO

    2015-10-01

    Full Text Available SUMMARY Cerebral toxoplasmosis can be highly debilitating and occasionally fatal in persons with immune system deficiencies. In this study, we evaluated the Toxoplasma gondii-specific IgG subclass antibody response in 19 cerebrospinal fluid (CSF samples from patients with cerebral toxoplasmosis who had a positive IgG anti-T. gondii ELISA standardized with a cyst antigen preparation. There were no significant differences between the rates of positivity and the antibody concentrations (arithmetic means of the ELISA absorbances, MEA for IgG1 and IgG2, but the rates of positivity and MEA values for these two IgG subclasses were significantly higher than those for IgG3 and IgG4. The marked IgG2 response in CSF from patients with cerebral toxoplasmosis merits further investigation.

  3. Prognostic value of intrathecal IgG synthesis in multiple sclerosis: a study in 54 patients

    Directory of Open Access Journals (Sweden)

    Aghamohammadi A

    2008-06-01

    Full Text Available Background: Multiple sclerosis (MS is an inflammatory disease of the central nervous system with multifocal areas of demyelination. Despite an increased understanding of the mechanisms causing MS, immunological factors that indicate disease activity are only starting to be discovered. Chronic brain inflammation is often associated with an increase in production of IgG in the CSF as determined by the IgG index (normal ≤0.77 and oligoclonal bands (OCBs. Different studies have found variable correlations between these two factors and disease progression. We herein evaluate the correlation of IgG index and OCB with disease progression in Iranian MS patients.Methods: The IgG index was measured in 54 patients with multiple sclerosis. The progression index (PI, type of disease course and the presence of OCBs were compared in patients with normal, high and very high IgG index.Results: PI was higher in patients with very high IgG indexes (0.10±0.13 vs. patients with high (0.06±0.05 and normal IgG indexes (0.05±0.07; p>0.05. Secondary progressive (SP patients had higher IgG indexes than those with relapsing-remitting (RR courses (2.04±1.24 for SP vs. 1.78±1.45 for RR; p>0.05. The PI was higher in OCB-positive MS patients (0.08±0.10 vs. OCB-negative patients (0.05±0.04 (p>0.05.Conclusion: Although the findings of this study need to be treated with some caution since this is not a prospective evaluation, the results indicate a trend toward better prognosis of the disease in patients with lower IgG index values. We think that the IgG index is a useful marker of disease activity in MS. Patients with IgG indexes above 1.1 could have an increased risk of progression and they would benefit from early treatment with immunomodulator agents. Our results did not reveal statistically significant prognostic value for IgG index in patients with multiple sclerosis. Thus the results warrant prospective studies to verify the prognostic value of intrathecal IgG

  4. Toxocara seroprevalence in children from a subtropical city in Argentina Prevalencia de anticuerpos anti Toxocara en niños de una ciudad subtropical de Argentina

    Directory of Open Access Journals (Sweden)

    José Mario ALONSO

    2000-08-01

    Full Text Available Most studies from Argentina have focused on toxocariasis as an environmental problem of big cities, and there are no available data about children infection from small or middle-sized cities. In order to assess the prevalence of anti-Toxocara antibodies in infantile population, 206 children from Resistencia, of both sexes, aged 1-14 years old were studied by Elisa testing with E/S T. canis L2 antigens. Hematological parameters and immunoglobulin levels were determined; five days' stool samples were studied and epidemiological data were obtained by means of a questionnaire to parents. Results showed that 73% of the children had one or more dogs living at home, 57% reported geophagia and 37.9% were positive for Toxocara serology, but there was no significant difference in prevalence neither for boys and girls, nor concerning age. An increased risk of infection was observed in age groups 5-6 and 7-8 for boys, and in age groups 3-4 and 5-6 for girls.La mayoría de los estudios realizados en Argentina, han enfocado a la Toxocariosis como un problema medioambiental propio de las grandes ciudades y no existen datos acerca de esta infección entre los niños de ciudades medianas o pequeñas. A fin de determinar la prevalencia de anticuerpos anti-Toxocara en la población infantil de la ciudad de Resistencia, se estudiaron 206 niños de ambos sexos, con edades comprendidas entre los 1-14 años, mediante el test de Elisa, empleando antígenos E/S de larva L2 de Toxocara canis. También se evaluaron los niveles de inmunoglobulinas séricas y los parámetros hematológicos; se efectuaron análisis coproparasitológico seriados en heces de 5 días y se recolectó información epidemiológica mediante cuestionario a los padres. Los resultados obtenidos señalan que el 73% de los niños tenían uno o mas perros viviendo en la casa, que el 57% tenían antecedentes de geofagia y que el 37.9% tenían serología positiva para Toxocara, aunque no hubo diferencias

  5. Serum Concentrations of IgG4 in the Spanish Adult Population: Relationship with Age, Gender, and Atopy

    Science.gov (United States)

    Carballo, Iago; Alvela, Lucía; Pérez, Luis-Fernando; Gude, Francisco; Vidal, Carmen; Alonso, Manuela; Sopeña, Bernardo; Gonzalez-Quintela, Arturo

    2016-01-01

    Background and Aim Serum IgG4 concentrations are commonly measured in clinical practice. The aim of this study was to investigate serum IgG4 concentrations in adults and their potential relationship with demographic, lifestyle, metabolic, and allergy-related factors. Methods Serum IgG4 concentrations were measured with a commercial assay in 413 individuals (median age 55 years, 45% males) who were randomly selected from a general adult population. Results Median IgG4 concentration was 26.8 mg/dL. Five out of the 413 individuals (1.2%) exhibited IgG4 concentrations >135 mg/dL, and 17 out of 411 (4.1%) exhibited an IgG4/total IgG ratio >8%. Serum IgG4 concentrations were significantly higher in males than in females and decreased with age. After adjusting for age and sex, serum IgG4 concentrations were not significantly influenced by alcohol consumption, smoking or common metabolic abnormalities (obesity and the related metabolic syndrome). Serum IgG4 concentrations were not significantly correlated with serum concentrations of proinflammatory cytokines and inflammation markers. Serum IgG4 concentrations were significantly correlated with IgE concentrations. Serum IgG4 concentrations tended to be higher in atopics (individuals with IgE-mediated sensitization to aeroallergens) than in non-atopics, particularly among atopics without respiratory symptoms. Serum IgG4 concentrations were not significantly correlated with total eosinophil blood count. Cases of IgG4-related disease were neither present at baseline nor detected after a median of 11 years of follow-up. Conclusions Studies aimed at defining reference IgG4 values should consider partitioning by age and sex. Further studies are needed to confirm the potential influence of atopy status on serum IgG4 concentrations. PMID:26910567

  6. IgG4-Related Disease Is Not Associated with Antibody to the Phospholipase A2 Receptor

    OpenAIRE

    Beck, Laurence H.; Salant, David J.; Arezou Khosroshahi; John H. Stone; Bloch, Donald B.; Rivka Ayalon

    2012-01-01

    Patients with IgG4-related disease (IgG4-RD) share histopathological characteristics that are similar across affected organs. The finding of infiltration with IgG4+ plasma cells in the proper clinical and histopathological contexts connects a large number of clinical entities that were viewed previously as separate conditions. The renal involvement in IgG4-RD is usually characterized by tubulointerstitial nephritis, but membranous nephropathy has also been reported to be one of the renal comp...

  7. UltramicroELISA para la detección de anticuerpos IgM anti M. leprae UltramicroELISA assay for the detection of human IgM antibodies to M. leprae

    OpenAIRE

    José Laferte; Elba G. Abreu; René Robaina; Vicente Verez

    1991-01-01

    La disponibilidad del sistema Ultramicroanalítico (SUMA) y de un antígeno especie-específico del M. leprae obtenido mediante síntesis química, permitió la normalización y validación de un ultramicroELISA para la detección de anticuerpos IgM específicos a esta micobacteria. El análisis de 433 sueros de banco de sangre y 265 sueros usados para validar el método y clasificados en un grupo control de donantes de banco de sangre (100), un grupo de pacientes tuberculosos (50), un grupo de enfermos ...

  8. POLYCLONAL ANTIBODIES TO DETECT THE CP-RT PROTEIN OF Potato Mop-Top VIRUS ANTICUERPOS POLICLONALES PARA LA DETECCIÓN DE LA PROTEÍNA CP-RT DEL Potato Mop-Top VIRUS

    Directory of Open Access Journals (Sweden)

    Derly Andrade Molina

    2012-06-01

    últiples submuestras por tejido bajo análisis. Con el fin de ampliar el rango de herramientas para la detección de PMTV, se obtuvieron anticuerpos dirigidos al dominio RT de la proteína CP-RT. Se secuenció dicho dominio en el aislamiento colombiano R25 de PMTV y se realizaron análisis bioinformáticos para ubicar regiones peptídicas con alto potencial inmunogénico. El péptido seleccionado fue inoculado en conejos para obtener anticuerpos, cuya utilidad fue evaluada a partir de pruebas de ELISA indirecto en plantas señuelo de Nicotiana benthamiana inoculadas con quistosoros de Sss y en plantas de papa obtenidas en La Unión (Antioquia. Estas pruebas estuvieron acompañadas con evaluaciones de RT-PCR. Se obtuvo la totalidad del dominio RT, así como 441 nt del gen CP. Los análisis filogenéticos identificaron la cepa R25 como asociada al linaje de PMTV mundialmente distribuido. Se obtuvieron 19,26 mg de anticuerpos, los que resultaron efectivos para detectar PMTV. Ya que CP-RT es responsable de la transmisión del PMTV por Sss, estos anticuerpos permitirán no sólo apoyar los programas de diagnóstico, sino también estudios básicos y epidemiológicos tendientes a evaluar las interacciones del PMTV y Sss.

  9. Analytical validation of anti-toxoplasma IgG immunoassays

    Directory of Open Access Journals (Sweden)

    Guenael Freire de Souza

    2012-12-01

    Full Text Available There are often discrepancies when using different methods to measure anti-Toxoplasma gondii IgG levels in patient samples. The diagnostic performance of a chemiluminescent immunoassay (CLIA and an enzyme-linked fluorescent assay (ELFA used as confirmatory tests for samples identified as positive or equivocal by an electrochemiluminescent immunoassay (ECLIA were examined. Cut-off values were those stated by the manufacturer, and Western blot was used to confirm the results of all methods. All samples identified as positive by ECLIA (n = 93 were confirmed as positive by Western blot, as were 14 of the 28 samples identified as equivocal. When these 121 samples were retested, the sensitivities of CLIA and ELFA were 64.4% and 73.8%, respectively. Both methods exhibited a specificity of 100%. This study confirms that the results obtained from the different immunoassays are not comparable, and neither CLIA nor ELFA should be used to confirm ECLIA results, which should instead be confirmed by methods such as Western blot or Sabin-Feldman dye test.

  10. Optimization of the cutoff value for a commercial anti-dengue virus IgG immunoassay.

    Science.gov (United States)

    Marrero-Santos, Karla M; Beltrán, Manuela; Carrión-Lebrón, Jessica; Sanchez-Vegas, Carolina; Hamer, Davidson H; Barnett, Elizabeth D; Santiago, Luis M; Hunsperger, Elizabeth A

    2013-03-01

    A commercial anti-dengue virus (anti-DENV) indirect IgG enzyme-linked immunosorbent assay (ELISA) for serological diagnosis was evaluated for its utility in determining previous DENV exposure in U.S. travelers. The Boston Area Travel Medicine Network clinics used Focus Diagnostics anti-DENV IgG ELISA to measure anti-DENV IgG antibodies in 591 pretravel specimens from U.S. residents who had traveled to countries where dengue is endemic. When using the manufacturer's index cutoff value for this ELISA, false-positive results were observed that overestimated the perceived past DENV exposure in U.S. travelers. Validation of 121 of these anti-DENV IgG results by plaque reduction neutralization test (PRNT) was used for receiver operating characteristic (ROC) curve optimization of the index cutoff value from 1 to 3.0, improving the specificity of the anti-DENV IgG ELISA from 24% to 95.7%. Additionally, previous vaccination with yellow fever virus contributed to 52.8% of the false-positive rate in the anti-DENV IgG ELISA results. Optimization of the cutoff value of the anti-DENV IgG ELISA provided better interpretation and confidence in the results and eliminated the need for confirmation by PRNT. The travel history of U.S. travelers was also useful for categorizing these travelers into groups for analysis of previous DENV exposure. PMID:23302742

  11. Changes in Healthy Human IgG Fc-Glycosylation after Birth and during Early Childhood.

    Science.gov (United States)

    de Haan, Noortje; Reiding, Karli R; Driessen, Gertjan; van der Burg, Mirjam; Wuhrer, Manfred

    2016-06-01

    Glycosylation on the fragment crystallizable (Fc) region of immunoglobulin G (IgG) has a large influence on the interaction of the antibody with Fc gamma receptors (FcγRs). IgG consists of four subclasses that all have distinct affinities for the different FcγRs. Knowledge about the Fc-glycosylation in healthy human is valuable as reference for new biomarkers and in the design of biopharmaceuticals that rely on IgG Fc-glycosylation. Previously, subclass-specific characterization of IgG Fc-glycosylation was performed for healthy adults, pregnant women, and newborns. For young healthy children, however, the subclass-specific description of IgG Fc-glycosylation is still lacking. Therefore, we performed the IgG subclass-specific analysis of the Fc-glycosylation of 130 healthy humans between birth and 40 years of age, including 22 samples derived from the umbilical cords of newborns. The analysis was performed by a previously published matrix-assisted laser desorption/ionization (MALDI)-time-of-flight (TOF)-mass spectrometry (MS) workflow, including a derivatization step for the linkage-specific stabilization of sialic acids. The characterization revealed that when children start to produce their own IgG they have a decreased galactosylation, sialylation, and bisection and an increased fucosylation compared with newborns. During childhood, the fucosylation and sialylation decrease, whereas bisection increases and galactosylation stays constant. PMID:27161864

  12. Human IgG subclasses against enterovirus Type 71: neutralization versus antibody dependent enhancement of infection.

    Directory of Open Access Journals (Sweden)

    Rui-Yuan Cao

    Full Text Available The emerging human enterovirus 71 (EV71 represents a growing threat to public health, and no vaccine or specific antiviral is currently available. Human intravenous immunoglobulin (IVIG is clinical used in treating severe EV71 infections. However, the discovery of antibody dependent enhancement (ADE of EV71 infection illustrates the complex roles of antibody in controlling EV71 infection. In this study, to identify the distinct role of each IgG subclass on neutralization and enhancement of EV71 infection, different lots of pharmaceutical IVIG preparations manufactured from Chinese donors were used for IgG subclass fractionation by pH gradient elution with the protein A-conjugated affinity column. The neutralization and ADE capacities on EV71 infection of each purified IgG subclass were then assayed, respectively. The neutralizing activity of human IVIG is mainly mediated by IgG1 subclass and to less extent by IgG2 subclass. Interestingly, IgG3 fraction did not have neutralizing activity but enhanced EV71 infection in vitro. These results revealed the different roles of human IgG subclasses on EV71 infection, which is of critical importance for the rational design of immunotherapy and vaccines against severe EV71 diseases.

  13. A Rapid Method to Characterize Mouse IgG Antibodies and Isolate Native Antigen Binding IgG B Cell Hybridomas.

    Directory of Open Access Journals (Sweden)

    Haolin Liu

    Full Text Available B cell hybridomas are an important source of monoclonal antibodies. In this paper, we developed a high-throughput method to characterize mouse IgG antibodies using surface plasmon resonance technology. This assay rapidly determines their sub-isotypes, whether they bind native antigen and their approximate affinities for the antigen using only 50 μl of hybridoma cell culture supernatant. Moreover, we found that mouse hybridomas secreting IgG antibodies also have membrane form IgG expression without Igα. Based on this surface IgG, we used flow cytometry to isolate rare γ2a isotype switched variants from a γ2b antibody secreting hybridoma cell line. Also, we used fluorescent antigen to single cell sort antigen binding hybridoma cells from bulk mixture of fused hybridoma cells instead of the traditional multi-microwell plate screening and limiting dilution sub-cloning thus saving time and labor. The IgG monoclonal antibodies specific for the native antigen identified with these methods are suitable for in vivo therapeutic uses, but also for sandwich ELISA assays, histology, flow cytometry, immune precipitation and x-ray crystallography.

  14. IgG4-related tubulointerstitial nephritis associated with only lymphadenopathy and without elevated serum IgG4 or renal imaging abnormalities: a case report and literature review.

    Science.gov (United States)

    Qiao, Xi; Wang, Lihua; Wang, Chen; Gao, Lifang; Yao, Shulei; Wu, Liran; Zhang, Xiaoqin

    2015-01-01

    IgG4-related tubulointerstitial nephritis (IgG4-TIN) is the most common renal manifestation of IgG4-related kidney disease (IgG4-RKD) and may cause acute or chronic renal dysfunction. Imaging often shows heterogeneous densities in the kidneys, such as a mass or multiple nodules. Serology usually demonstrates high levels of serum IgG4 and total IgG. Most patients have other organs involvement by IgG4 related disease. Although lymphadenopathy is frequently observed in patients with IgG4-TIN, it is rarely presented as the only extrarenal lesion. Herein, we present a rare case of IgG4-TIN associated with only lymphadenopathy and without elevated serum IgG4 or renal imaging abnormalities. A 61-year-old Chinese man was admitted to our hospital with seven months history of generalized lymphadenopathy and five months history of renal dysfunction. His renal imaging was normal. He had no current or previous clinical, radiographic, and/or histologic evidence of other organ involvement except for the lymphadenopathy. Renal biopsy indicated plasma cell-rich TIN with an increased number of IgG4-positive plasma cells and storiform fibrosis. Repeated lymph nodes biopsy revealed IgG4-related lymphadenopathy. However, he did not have elevated serum IgG4 or total IgG levels. Oral prednisone therapy improved his renal function and lymphadenopathy. These findings supported our final diagnosis of IgG4-TIN. Clinicians should be aware of this condition and steroid therapy should be considered for such patients. An early diagnosis and appropriate therapy can induce remission and preserve renal function. PMID:26770608

  15. Prevalence of IgG4-Related Disease in Japan Based on Nationwide Survey in 2009

    OpenAIRE

    Kazushige Uchida; Atsushi Masamune; Tooru Shimosegawa; Kazuichi Okazaki

    2012-01-01

    The number of patients with autoimmune pancreatitis who visited hospitals in Japan in 2007 was approximately 2709 (95% confidence interval; range 2540–3040). Because IgG4-related disease is a new clinical entity, there are no data with regard to its prevalence. To estimate the number of patients with IgG4-related disease in Japan, we randomly selected hospitals using stratification and asked them how many patients they had with IgG4-related disease in 2009. The number of patients with Mikulic...

  16. Intracranial spread of IgG4-related disease via skull base foramina.

    Science.gov (United States)

    Rice, C M; Spencer, T; Bunea, G; Scolding, N J; Sloan, P; Nath, U

    2016-06-01

    IgG4-related disease (IgG4-RD) is a newly recognised, multiorgan, inflammatory disease, and its full clinical spectrum remains undefined. We present a biopsy-proven case of IgG4-RD presenting with a parapharyngeal mass with intracranial extension and possible involvement of the brain parenchyma. We highlight the importance of considering the diagnosis in those presenting with tumefactive lesions, leptomeningitis or pachymeningitis and emphasise the value of securing a tissue diagnosis so that appropriate long-term treatment can be instigated and complications avoided. PMID:26856357

  17. IgG4 subclass antibodies impair antitumor immunity in melanoma

    OpenAIRE

    Karagiannis, Panagiotis; Gilbert, Amy E.; Josephs, Debra H; Ali, Niwa; Dodev, Tihomir; Saul, Louise; Correa, Isabel; Roberts, Luke; Beddowes, Emma; Koers, Alexander; Hobbs, Carl; Ferreira, Silvia; Geh, Jenny L.C.; Healy, Ciaran; Harries, Mark

    2013-01-01

    Host-induced antibodies and their contributions to cancer inflammation are largely unexplored. IgG4 subclass antibodies are present in IL-10–driven Th2 immune responses in some inflammatory conditions. Since Th2-biased inflammation is a hallmark of tumor microenvironments, we investigated the presence and functional implications of IgG4 in malignant melanoma. Consistent with Th2 inflammation, CD22+ B cells and IgG4+-infiltrating cells accumulated in tumors, and IL-10, IL-4, and tumor-reactive...

  18. IgG4- related disease: an orphan disease with many faces

    OpenAIRE

    Pieringer, Herwig; Parzer, Ilse; Wöhrer, Adelheid; Reis, Petra; Oppl, Bastian; Zwerina, Jochen

    2014-01-01

    Immunoglobulin G4- related disease (IgG4-RD) is a rare systemic fibro-inflammatory disorder (ORPHA284264). Although patients have been described more than 100 years ago, the systemic nature of this disease has been recognized in the 21st century only. Type 1 autoimmune pancreatitis is the most frequent manifestation of IgG4-RD. However, IgG4-RD can affect any organ such as salivary glands, orbits, retroperitoneum and many others. Recent research enabled a clear clinical and histopathological ...

  19. Severe IgG4-Related Disease in a Young Child: A Diagnosis Challenge

    OpenAIRE

    Susana Corujeira; Catarina Ferraz; Teresa Nunes; Elsa Fonseca; Luísa Guedes Vaz

    2015-01-01

    Immunoglobulin G4-related disease (IgG4-RD) is an increasingly recognized syndrome that can appear with multiple organ involvement, typically with tumor-like swelling, lymphoplasmacytic infiltrate rich in IgG4-positive plasma cells, and elevated serum IgG4 concentrations. We report the case of a 22-month-old female child with failure to thrive and recurrent respiratory tract infections since 8 months of age. Physical examination was normal except for pulmonary auscultation with bilateral crac...

  20. Immunoglobulin G4-related disease with scant tissue IgG4

    OpenAIRE

    Makiishi, Tetsuya; Shirase, Tomoyuki; Hieda, Nobuhiro; Maeda, Sayako

    2013-01-01

    A 56-year-old man was admitted to our hospital for renal dysfunction and symmetrical swelling of submandibular glands. Laboratory and imaging findings were consistent with immunoglobulin G4-related disease (IgG4RD). Histological findings of the submandibular gland and the kidney were also consistent with IgG4RD. However, the patient did not have elevated serum or tissue IgG4 levels. Oral prednisolone therapy, initially 50 mg/day and gradually tapered over 12 months, improved his laboratory ab...

  1. Optimization of the Cutoff Value for a Commercial Anti-Dengue Virus IgG Immunoassay

    OpenAIRE

    Marrero-Santos, Karla M.; Beltrán, Manuela; Carrión-Lebrón, Jessica; Sanchez-Vegas, Carolina; Hamer, Davidson H; Barnett, Elizabeth D.; Luis M Santiago; Hunsperger, Elizabeth A.

    2013-01-01

    A commercial anti-dengue virus (anti-DENV) indirect IgG enzyme-linked immunosorbent assay (ELISA) for serological diagnosis was evaluated for its utility in determining previous DENV exposure in U.S. travelers. The Boston Area Travel Medicine Network clinics used Focus Diagnostics anti-DENV IgG ELISA to measure anti-DENV IgG antibodies in 591 pretravel specimens from U.S. residents who had traveled to countries where dengue is endemic. When using the manufacturer's index cutoff value for this...

  2. IgG4-related lung disease manifested as pneumonia in puerperium: a case report

    OpenAIRE

    Wang, Jinlin; Zeng, Yunxiang; Gu, Yingying; Li, Shiyue

    2015-01-01

    IgG4-related lung disease (IgG4-RLD) is recently emerging entity. Several reports concerned with the clinicopathologic feature have been described, but this disease in puerperium has not been reported previously. Here, we report a 24-year-old woman diagnosed as IgG4-RLD in puerperium, who developed dry cough, low fever and exertional dyspnea following the delivery. The inflammatory markers and pulmonary lesions of the patient suggested pneumonia. However, there was no improvement after antibi...

  3. Serum immunoglobulins, IgG subclasses, isohemagglutinins and complement-3 levels in patients with thalassemia major.

    Science.gov (United States)

    Vergin, C; Kutukculer, N; Cetingul, N; Nisli, G; Caglayan, S; Oztop, S

    1997-01-01

    Serum IgG, IgM, IgA, IgG subclasses (IgG1, G2, G3, G4), isohemagglutinins and complement-3 concentrations were measured in 23 beta-thalassemic patients suffering from recurrent infections. No significant abnormalities were found in these humoral immunity investigations, both in splenectomized and non-splenectomized patients. On the other hand, iron overload or repeated blood transfusions were not found to down-regulate the humoral immune system of thalassemic patients. PMID:10771839

  4. Inmunogenicidad de conjugados de polisacárido de Neisseria meningitidis serogrupo C unido al toxoide tetánico por diferentes brazos espaciadores

    Directory of Open Access Journals (Sweden)

    Osmir Cabrera

    2005-01-01

    Full Text Available El desarrollo de las vacunas conjugadas compuestas por polisacáridos unidos covalentemente a proteínas contra Haemophilus influenzae type b, han demostrado ser eficaces en infantes, lo que condujo al desarrollo activo de las vacunas conjugadas contra otros microorganismos por varios grupos de investigaci ón. La influencia en la respuesta inmune de la estructura de los brazos espaciadores utilizados en conjugados de polisacárido de N. meningitidis serogrupo C (PMGC-toxoide tetánico (TT fue evaluado en ratones Balb/c. Se determin ó la generación de anticuerpos IgG anti-PMGC e IgG anti-TT en los sueros de los animales inoculados por medio de un ELISA indirecto. También se evaluaron las subclases de anticuerpos IgG1 e IgG2a anti PMGC. El 1,6-diaminohexano (AH, el 1,8-diaminooctano (AO, el ácido 6-aminohexanoico (AA y la dihidrazida del ácido adípico (ADH, fueron utilizados como brazos espaciadores con diferentes estructuras químicas, unidos al PMGC y al TT por medio de la reacción con carbodiimida. El suero de todos los ratones que fueron inoculados con los conjugados presentaron elevados títulos de IgG anti-PMGC y los valores más elevados se encontraron en los sueros de animales inoculados con el conjugado en los que se utilizó al ADH como brazo espaciador. En los grupos de animales inmunizados con los conjugados que utilizaron al AO y al ADH se detectaron títulos de IgG2a superiores a los detectados para el PMGC no conjugado; se observaron los títulos de IgG2a más elevados en los sueros de ratones inmunizados con conjugados con ADH. Las concentraciones de anticuerpos IgG anti-TT observados en los sueros de los ratones inmunizados con los conjugados fueron más elevados que los determinados en el suero de animales inmunizados con el TT. Se concluyó que la respuesta inmune obtenida en los ratones después de ser inoculados con los conjugados varía en dependencia del brazo del espaciador utilizado, siendo más elevada cuando se

  5. Current concept and diagnosis of IgG4-related disease in the hepato-bilio-pancreatic system

    OpenAIRE

    Okazaki, Kazuichi; Uchida, Kazushige; Ikeura, Tsukasa; Takaoka, Makoto

    2013-01-01

    Recently, IgG4-related disease (IgG4-RD) has been recognized as a novel clinical entity with multiorgan involvement and unknown origin, associated with abundant infiltration of IgG4-positive cells. The Japanese research committee, supported by the Ministry of Health, Labor and Welfare of Japan, unified many synonyms for these conditions to the term “IgG4-RD” in 2009. The international symposium on IgG4-RD endorsed the comprehensive nomenclature as IgG4-RD, and proposed the individual nomencla...

  6. Perivascular fibrosis and IgG4-related disease: a case report

    Directory of Open Access Journals (Sweden)

    S. Monti

    2014-11-01

    Full Text Available Immunoglobulin G4-related disease (IgG4-RD is a newly recognized fibroinflammatory condition which can potentially involve any organ. Some characteristic histopathologic features with lymphoplasmacytic infiltrate, an increased number of IgG4+ cells, storiform fibrosis and obliterative phlebitis are the mainstay for diagnosis. Serum IgG4 levels often increase. We report the case of a patient with perivascular fibrotic lesions involving the aortic arch and the splenic hilum, with a surgical biopsy-proven diagnosis of IgG4-related disease. The patient is now undergoing a low-dose corticosteroid maintenance therapy without evidence of new localizations of the disease. This case highlights the need for increasing awareness and recognition of this new, emerging clinical condition.

  7. IgG4-related disease: a systemic condition with characteristic microscopic features

    DEFF Research Database (Denmark)

    Detlefsen, Sönke

    2013-01-01

    observation that many patients suffering from autoimmune pancreatitis (AIP), a specific type of chronic pancreatitis, had elevated serum levels of IgG4, it was reported that these patients also had increased numbers of IgG4-positive cells in the inflamed pancreatic tissue. In 2003, it was noted that a...... diseases on their own, others have been included under the umbrella of "multifocal fibrosclerosis". Biopsies or resection specimens from affected organs in IgG4-RD reveal several common microscopic features irrespective of the site of the lesion. Cellular and storiform fibrosis, lymphoplasmacytic...... microscopic features, diagnosis and differential diagnosis of the different organ manifestations of IgG4-RD, and the current concepts of its pathogenesis will also be addressed....

  8. Diagnostic value of CagA IgG in the process to eradicate Helicobacter pylori

    Institute of Scientific and Technical Information of China (English)

    Zhi Bang Yang; Pi Long Wang; Ming Ming Gu; Li Hao Chen; Quan Chen; Lin Zhan

    2000-01-01

    AIM To investigate the diagnostic value of CagA IgG in serum.METHODS Seventy three patients with peptic ulcer infected with HP were eradicated by antibioticstherapy. At pretreatment, wk9 and wk20 after treatment, the detection of Hp in gastric muscosa bybacteriologic method were performed, and CagA and whole-cell antigen of HP igG in serum by ELISAmethod were also performed at the same time.RESULTS The IgG titres of Hp CagA and whole-cell antigen changes in accordance with the efficacy ofHp eradicated. The former with an earlier appearance and a greater number of cases decreased to normallevel in comparison with the latter.CONCLUSION CagA IgG is a better index for observing the effectiveness of the eradication of Hp.

  9. MuSK induced experimental autoimmune myasthenia gravis does not require IgG1 antibody to MuSK.

    Science.gov (United States)

    Küçükerden, Melike; Huda, Ruksana; Tüzün, Erdem; Yılmaz, Abdullah; Skriapa, Lamprini; Trakas, Nikos; Strait, Richard T; Finkelman, Fred D; Kabadayı, Sevil; Zisimopoulou, Paraskevi; Tzartos, Socrates; Christadoss, Premkumar

    2016-06-15

    Sera of myasthenia gravis (MG) patients with muscle-specific receptor kinase-antibody (MuSK-Ab) predominantly display the non-complement fixing IgG4 isotype. Similarly, mouse IgG1, which is the analog of human IgG4, is the predominant isotype in mice with experimental autoimmune myasthenia gravis (EAMG) induced by MuSK immunization. The present study was performed to determine whether IgG1 anti-MuSK antibody is required for immunized mice to develop EAMG. Results demonstrated a significant correlation between clinical severity of EAMG and levels of MuSK-binding IgG1+, IgG2+ and IgG3+ peripheral blood B cells in MuSK-immunized wild-type (WT) mice. Moreover, MuSK-immunized IgG1 knockout (KO) and WT mice showed similar EAMG severity, serum MuSK-Ab levels, muscle acetylcholine receptor concentrations, neuromuscular junction immunoglobulin and complement deposit ratios. IgG1 and IgG3 were the predominant anti-MuSK isotypes in WT and IgG1 KO mice, respectively. These observations demonstrate that non-IgG1 isotypes can mediate MuSK-EAMG pathogenesis. PMID:27235354

  10. Production of monoclonal antibodies against Streptococcus mutans antigens Produção de anticorpos monoclonais contra antígenos de Streptococcus mutans

    Directory of Open Access Journals (Sweden)

    Antonio Carlos Victor Canettieri

    2006-12-01

    Full Text Available Several studies have been conducted in the last decades aiming to obtain an anti-caries vaccine, however some studies have demonstrated cross reactivity between Streptococcus mutans surface antigens and the human cardiac tissue. In this work, the reactivity of five anti-Streptococcus mutans monoclonal antibodies (MoAb (24A, 56G, C8, E8 and F6 was tested against oral streptococci, cardiac antigens and skeletal and cardiac myosins, aiming to evaluate the specificity of these MoAb. The hybrid producers of immunoglobulins of the IgG2b class were cloned by limit dilution and expanded in vivo. MoAb were tested by ELISA. The hybrid 24A reacted with S. mutans CCT 1910, S. salivarius CCT 0365 and S. pyogenes T23. No reactivity difference was observed among the tested species. Cross reactivity with heart and cardiac myosin was not confirmed and only reaction with myosin of skeletal muscle was observed (p = 0.0381. The hybrid 56G reacted with all the tested microorganisms and there was statistically significant difference between S. mutans and S. pyogenes T23 (p Diversos estudos foram realizados nas últimas décadas com o intuito de se obter uma vacina anticárie dentária, mas alguns trabalhos têm demonstrado reatividade cruzada entre antígenos de superfície de Streptococcus mutans e tecido cardíaco humano. Neste trabalho, foi testada a reatividade de cinco anticorpos monoclonais (AcMo anti-Streptococcus mutans (24A, 56G, C8, E8 e F6 contra estreptococos orais, antígenos cardíacos e miosinas esquelética e cardíaca, no intuito de avaliar a especificidade desses AcMo. Os híbridos produtores de imunoglobulinas da classe IgG2b foram clonados por diluição limite e expandidos in vivo. Os AcMo foram testados por ELISA. O híbrido 24A reagiu com S. mutans CCT 1910, S. salivarius CCT 0365 e S. pyogenes T23. Nenhuma diferença de reatividade foi detectada entre as espécies analisadas. Reatividade cruzada com coração e miosina cardíaca não foi

  11. A prominent lack of IgG1-Fc fucosylation of platelet alloantibodies in pregnancy

    OpenAIRE

    Kapur, R.; Kustiawan, I.; Vestrheim, A.; Koeleman, C. A. M.; de Visser, R; Einarsdottir, H. K.; Porcelijn, L.; Jackson, D; Kumpel, B; Deelder, A. M.; Blank, D.; Skogen, B.; Killie, M. K.; Michaelsen, T. E.; Haas, M.

    2014-01-01

    Immunoglobulin G (IgG) formed during pregnancy against human platelet antigens (HPAs) of the fetus mediates fetal or neonatal alloimmune thrombocytopenia (FNAIT). Because antibody titer or isotype does not strictly correlate with disease severity, we investigated by mass spectrometry variations in the glycosylation at Asn297 in the IgG Fc because the composition of this glycan can be highly variable, affecting binding to phagocyte IgG-Fc receptors (FcγR). We found markedly decreased levels of...

  12. IgG4 deposits in pure and combined membranous lupus nephritis.

    Science.gov (United States)

    Herrera van Oostdam, David; Martínez Martínez, Marco U; Oros-Ovalle, Cuauhtémoc; Martínez-Gala, David; Jaimes Piñón, Gerardo T; Abud Mendoza, Carlos

    2016-06-01

    The aim of this study is to determine the frequency and prognosis of IgG4 deposits in renal biopsy of patients with membranous lupus nephritis (MLN). This is a retrospective cohort study in which we included patients with class V alone or combined (III/V or IV/V) of lupus nephritis according to the 2004 ISN/RPS. All the patients included must have availability of renal tissue for immunohistochemistry analyses. We excluded other classes of lupus nephritis. The renal tissue was examined by a nephro-pathologist. We included 65 patients with MLN; of these, 24 (37 %) were class V, and the other had proliferative concomitant with membranous patterns. Seven renal specimens had IgG4 deposits (10 %). Patients with IgG4 deposits had higher levels of eosinophils in serum. All of the patients with IgG4 had renal involvement as first manifestations of systemic lupus erythematosus. The rate of renal failure was 42 and 43 % in IgG4 positive and negative, respectively, 28 % of IgG4 required renal replacement therapy. From a histological view, 42 % of IgG4 had evidence of arteriolar vasculitis in renal biopsies. Lupus patients with IgG4 deposits were more likely to have renal involvement as a first manifestation of systemic lupus erythematosus, and they course with a worse prognosis since they required more dialysis. Also, they have more probability of vascular inflammation on the renal biopsy. PMID:27139512

  13. Acute Interstitial Nephritis and Membranous Nephropathy in the Context of IgG4-Related Disease

    OpenAIRE

    Stylianou, Kostas; Maragkaki, Eleftheria; Tzanakakis, Michael; Stratakis, Stavros; Gakiopoulou, Hariklia; Daphnis, Eugene

    2014-01-01

    We present the case of a patient with IgG4-related disease, which manifested in an asynchronous manner as vitiligo, cholecystitis, sialadenitis, lymphadenopathy, facial palsy and kidney dysfunction. The patient underwent a renal biopsy, and a presumptive diagnosis of lupus nephritis was made due to compatible clinical and immunological findings. The biopsy revealed IgG4-related kidney disease with severe interstitial nephritis and membranous nephropathy. Corticosteroids treatment restored all...

  14. Clinical utility of testing AQP4-IgG in CSF

    Science.gov (United States)

    Majed, Masoud; Fryer, James P.; McKeon, Andrew; Lennon, Vanda A.

    2016-01-01

    Objective: To define, using assays of optimized sensitivity and specificity, the most informative specimen type for aquaporin-4 immunoglobulin G (AQP4-IgG) detection. Methods: Results were reviewed from longitudinal service testing for AQP4-IgG among specimens submitted to the Mayo Clinic Neuroimmunology Laboratory from 101,065 individual patients. Paired samples of serum/CSF were tested from 616 patients, using M1-AQP4-transfected cell-based assays (both fixed AQP4-CBA Euroimmun kit [commercial CBA] and live in-house flow cytometry [FACS]). Sensitivities were compared for 58 time-matched paired specimens (drawn ≤30 days apart) from patients with neuromyelitis optica (NMO) or high-risk patients. Results: The frequency of CSF submission as sole initial specimen was 1 in 50 in 2007 and 1 in 5 in 2015. In no case among 616 paired specimens was CSF positive and serum negative. In 58 time-matched paired specimens, AQP4-IgG was detected by FACS or by commercial CBA more sensitively in serum than in CSF (respectively, p = 0.06 and p 1:100 predicted CSF positivity (p < 0.001). The probability of CSF positivity was greater around attack time (p = 0.03). No control specimen from 128 neurologic patients was positive by either assay. Conclusions: FACS and commercial CBA detection of AQP4-IgG is less sensitive in CSF than in serum. The data suggest that most AQP4-IgG is produced in peripheral lymphoid tissues and that a critical serum/CSF gradient is required for IgG to penetrate the CNS in pathogenic quantity. Serum is the optimal and most cost-effective specimen for AQP4-IgG testing. Classification of evidence: This study provides Class IV evidence that for patients with NMO or NMOSD, CSF is less sensitive than serum for detection of AQP4-IgG. PMID:27144221

  15. Increased in vivo effector function of human IgG4 isotype antibodies through afucosylation.

    Science.gov (United States)

    Gong, Qian; Hazen, Meredith; Marshall, Brett; Crowell, Susan R; Ou, Qinglin; Wong, Athena W; Phung, Wilson; Vernes, Jean-Michel; Meng, Y Gloria; Tejada, Max; Andersen, Dana; Kelley, Robert F

    2016-01-01

    For some antibodies intended for use as human therapeutics, reduced effector function is desired to avoid toxicities that might be associated with depletion of target cells. Since effector function(s), including antibody-dependent cell-mediated cytotoxicity (ADCC), require the Fc portion to be glycosylated, reduced ADCC activity antibodies can be obtained through aglycosylation of the human IgG1 isotype. An alternative is to switch to an IgG4 isotype in which the glycosylated antibody is known to have reduced effector function relative to glycosylated IgG1 antibody. ADCC activity of glycosylated IgG1 antibodies is sensitive to the fucosylation status of the Fc glycan, with both in vitro and in vivo ADCC activity increased upon fucose removal ("afucosylation"). The effect of afucosylation on activity of IgG4 antibodies is less well characterized, but it has been shown to increase the in vitro ADCC activity of an anti-CD20 antibody. Here, we show that both in vitro and in vivo activity of anti-CD20 IgG4 isotype antibodies is increased via afucosylation. Using blends of material made in Chinese hamster ovary (CHO) and Fut8KO-CHO cells, we show that ADCC activity of an IgG4 version of an anti-human CD20 antibody is directly proportional to the fucose content. In mice transgenic for human FcγRIIIa, afucosylation of an IgG4 anti-mouse CD20 antibody increases the B cell depletion activity to a level approaching that of the mIgG2a antibody. PMID:27216702

  16. An Overlapping Case of Lupus Nephritis and IgG4-Related Kidney Disease.

    Science.gov (United States)

    Zaarour, Mazen; Weerasinghe, Chanudi; Eter, Ahmad; El-Sayegh, Suzanne; El-Charabaty, Elie

    2015-07-01

    We report a case of a 71-year-old Filipino female who was admitted to the hospital for abdominal pain, vomiting and diarrhea of 8 days duration. The patient was found to have marked acute kidney injury (AKI), which required hemodialysis in the next 3 days. Extensive workup revealed hematuria, subnephrotic range proteinuria, elevated anti-nuclear antibody (ANA) and elevated total immunoglobulin G (IgG) levels, with normal IgG4 and anti-dsDNA levels. On kidney biopsy, mild membranous glomerulonephritis was found, along with autoimmune tubulointerstitial nephritis (TIN) with a "full-house" pattern of immune deposits. These findings were suggestive of lupus interstitial nephritis. However, IgG4+ plasma cells were detected in the interstitium by immunostaining, favoring a diagnosis of IgG4-related kidney disease (IgG4-RKD). Our case highlights the difficulty in differentiating lupus nephritis (LN) from IgG4-RKD in some patients, raising the suspicion that these two entities can co-exist. PMID:26015827

  17. Utility of FDG PET/CT in IgG4-related systemic disease

    International Nuclear Information System (INIS)

    IgG4-related systemic disease (IgG4-RSD) is an emerging clinical entity about which much remains to be elucidated, in terms of its aetiology, pathogenesis, diagnosis, treatment and outcome. Autoimmune pancreatitis (AIP) and Mikulicz disease (MD) are the two major, well-studied constituents of IgG4-RSD. AIP and MD have common characteristics of forming tumour-mimicking lesions that consist of lymphoplasmacytic infiltrates and fibrosclerosis with numerous immunoglobulin G4 (IgG4)-positive plasma cells, as well as various multi-organ manifestations of IgG4-RSD. 2-[18F]-fluoro-2-deoxy-D-glucose positron-emission tomography/ computed tomography (FDG PET/CT) enables the acquisition of whole-body images and provides functional information about disease activity; as such it has a valuable role in staging extent of disease, guiding biopsy, and monitoring response to treatment. However, FDG PET/CT is likely to be only one component of the management strategy, and clinical, laboratory, imaging and histological findings are crucial in the overall diagnosis of the condition. At present FDG PET/CT does not have a well-established role in the assessment of patients with IgG4-RSD and future prospective studies are required to define the cost-effectiveness and clinical impact in this patient group more accurately.

  18. Enhancement of anti-OVA IgG2c production in vivo by enalapril

    Directory of Open Access Journals (Sweden)

    L.C. Almeida

    2016-01-01

    Full Text Available Angiotensin-converting enzyme (ACE inhibitors have non-hemodynamic, pleiotropic effects on the immune response. The effects of ACE inhibitors on the production of cytokines and T-cell functions are well established. However, little is known on the effects of these medicines on humoral response to foreign antigens. In this study, we investigated the effect of enalapril treatment on ovalbumin (OVA-specific IgG1 and IgG2c production in mice determined by ELISA. Two groups of 8-week-old C57BL/6 females mice (3–4/group were subcutaneously immunized with OVA (10 μg/animal in presence of Alhydrogel (1 mg/mouse and boosted at day 21. The mice were treated with enalapril (5 mg/kg daily, po or were left without treatment for one month. The animals were bled from the orbital plexus on days 0, 7, 14, 21, and 28 after the first immunization and the sera were stored at –20°C until usage. OVA-specific serum IgG1 and IgG2c were determined by ELISA using serum from each individual animal. The results showed that enalapril significantly increased anti-OVA serum IgG2c in the secondary response without affecting IgG1 synthesis. These data expand our understanding on the properties of enalapril on the immune response, including antibody production.

  19. Enhancement of anti-OVA IgG2c production in vivo by enalapril.

    Science.gov (United States)

    Almeida, L C; Muraro, L S; Albuquerque, D A

    2016-07-11

    Angiotensin-converting enzyme (ACE) inhibitors have non-hemodynamic, pleiotropic effects on the immune response. The effects of ACE inhibitors on the production of cytokines and T-cell functions are well established. However, little is known on the effects of these medicines on humoral response to foreign antigens. In this study, we investigated the effect of enalapril treatment on ovalbumin (OVA)-specific IgG1 and IgG2c production in mice determined by ELISA. Two groups of 8-week-old C57BL/6 females mice (3-4/group) were subcutaneously immunized with OVA (10 μg/animal) in presence of Alhydrogel (1 mg/mouse) and boosted at day 21. The mice were treated with enalapril (5 mg/kg daily, po) or were left without treatment for one month. The animals were bled from the orbital plexus on days 0, 7, 14, 21, and 28 after the first immunization and the sera were stored at -20°C until usage. OVA-specific serum IgG1 and IgG2c were determined by ELISA using serum from each individual animal. The results showed that enalapril significantly increased anti-OVA serum IgG2c in the secondary response without affecting IgG1 synthesis. These data expand our understanding on the properties of enalapril on the immune response, including antibody production. PMID:27409332

  20. Serum IgG antibodies to C1q in hypocomplementemic urticarial vasculitis syndrome.

    Science.gov (United States)

    Wisnieski, J J; Naff, G B

    1989-09-01

    Urticaria, angioedema, and arthritis are cardinal features of hypocomplementemic urticarial vasculitis syndrome (HUVS). Considered to be an immune complex-mediated disorder, HUVS has been differentiated from systemic lupus erythematosus (SLE), based on its clinical manifestations and the C1q precipitin (C1q-p) reaction, which is manifested as gel precipitation of C1q by a small percentage of HUVS IgG molecules. This phenomenon has been attributed to an Fc region abnormality, and the responsible IgG molecules are said to possess C1q-p activity. We purified IgG from 4 HUVS patients and confirmed that HUVS IgG contains C1q binding activity. F(ab')2 fragments from these patients also bound to C1q, as measured by 2 different C1q binding methods at physiologic ionic strength; HUVS IgG Fc fragments did not bind to C1q. Preincubation of HUVS F(ab')2 fragments with antibody to human F(ab')2 prevented subsequent binding to C1q. We conclude that IgG antibodies to C1q are present in HUVS serum, and it is likely that these antibodies are C1q-p. Because the clinical manifestations of HUVS and the presence of anti-C1q antibodies have been described in patients with SLE, our findings support the concept that HUVS is an autoimmune syndrome related to SLE. PMID:2528353

  1. THE EFFECT OF SLEEP DEPRIVATION ON SERUM IGG RESPONSES TO AEROBIC ACTIVITY IN COLLEGE STUDENT ATHLETES

    Directory of Open Access Journals (Sweden)

    Saeed Jamshidi Far

    2014-11-01

    Full Text Available Background & Aims: Sleep is a restorative process for the immune system. There are many situations in which sleep is disturbed prior to an athletic event. However, the effect of sleep deprivation on immune indices in response to exercise remains unknown. The aim of this study was to investigate the effects of sleep deprivation on serum IgG responses to aerobic activity. Materials & Methods: In this quasi-experimental study, 10 male physical education students were voluntarily participated. Study was performed in two separate occasions; control and experimental within two weeks. In the control occasion, normal sleep and aerobic activity and in the experimental occasion, sleep deprivation and aerobic activity was applied. Aerobic activity was performed on bicycle ergometer for 30 minutes at intensity of 70 to 75 percent of maximum heart rate. Changes in serum IgG concentrations in pre-test, before and after aerobic activity in both occasions were analyzed by the two repeated measures ANOVA and dependent T-test using SPSS software. Results: The results showed that sleep deprivation not significantly effect on Serum IgG response to aerobic activity (p=0.130. Also, aerobic activity not significantly effect on Serum IgG concentration (p=0.357. But sleep deprivation caused a significantly increase in serum IgG concentration (p=0.035. Conclusion: No significant effect of sleep deprivation on serum IgG concentrations response to aerobic activity.

  2. The Pathology of IgG4-Related Disease in the Bile Duct and Pancreas.

    Science.gov (United States)

    Zen, Yoh

    2016-08-01

    Immunoglobulin G4-related disease (IgG4-RD) in the pancreatobiliary system manifests as sclerosing cholangitis (SC), hepatic inflammatory pseudotumors, and type 1 autoimmune pancreatitis (AIP). The pathology of IgG4-RD involves an inflammatory process and fibrogenic pathway, the combination of which damages the affected organs. Fibroinflammatory injury is characterized by three microscopic findings: a diffuse lymphoplasmacytic infiltrate rich in IgG4-positive plasma cells, obliterative phlebitis, and storiform fibrosis. Although the diagnosis of IgG4-related pancreatocholangitis is relatively straightforward in surgical specimens, the current clinical requirement is to diagnose patients using biopsy samples, which remains challenging. Histological differential diagnoses include primary SC, follicular cholangitis/pancreatitis, SC with granulocytic epithelial lesions, and type 2 AIP. Although the massive infiltration of IgG4-positive plasma cells is a histological hallmark of IgG4-RD, many other immune cells (e.g., Th2 lymphocytes, regulatory T cells, and M2 macrophages) appear to be strongly involved in orchestral immune reactions. PMID:27466794

  3. Elbow- and hinge-bending motions of IgG: Dielectric response and dynamic feature.

    Science.gov (United States)

    Hayashi, Yoshihito; Yagihara, Shin

    2016-09-01

    Immunoglobulin G (IgG) is a Y-shaped globular protein consisting of two Fab segments connecting to an Fc segment with a flexible hinge region, in which the Fab segments show secondary flexibility at an "elbow" region. In the present work, the hinge-bending and elbow-bending motions of aqueous solutions of IgG by microwave dielectric measurements below the freezing point of bulk water was observed. The presence of unfreezable water around the macromolecules reduced the effects of steric hindrance normally generated by ice and enabled the intramolecular motions of IgG. At the same time, the overall IgG molecule rotation was restricted by ice. Papain digestion and reduction of the disulfide linkage at the hinge region was used to generate Fab and Fc fragments. In solutions of these fragments, the dielectric relaxation process of the hinge-bending motion was absent, although the elbow-bending motion remained. Three relaxation processes were observed for papain-digested IgG. The high, middle, and low frequency processes were attributed to unfrozen water, local peptide motions cooperating with bound water, and the elbow-bending motion, respectively. In the case of the intact IgG, an additional relaxation process due to the hinge-bending motion was observed at frequencies lower than that of the elbow-bending motion. © 2016 Wiley Periodicals, Inc. Biopolymers 105: 626-632, 2016. PMID:27018805

  4. Neuromyelitis optica IgG stimulates an immunological response in rat astrocyte cultures

    Institute of Scientific and Technical Information of China (English)

    Howe CL; Kaptzan T; Magaa SM; Ayers-Ringler JR; LaFrance-Corey RG; Lucchinetti CF

    2014-01-01

    Neuromyelitis optica (NMO) is a primary astrocyte disease associated with central nervous system inflammation, demyelination, and tissue injury. Brain lesions are frequently observed in regions enriched in expression of the aquaporin-4 (AQP4) water channel, an antigenic target of the NMO IgG serologic marker. Based on observations of disease reversibility and careful characterization of NMO lesion development, we propose that the NMO IgG may induce a dynamic immunological response in astrocytes. Using primary rat astrocyte-enriched cultures and treatment with NMO patient-derived serum or purified IgG, we observed a robust pattern of gene expression changes consistent with the induction of a reactive and inflammatory phenotype in astrocytes. The reactive astrocyte factor lipocalin-2 and a broad spectrum of chemokines, cytokines, and stress response factors were induced by either NMO patient serum or purified IgG. Treatment with IgG from healthy controls had no effect. The effect is disease-specific, as serum from patients with relapsing-remitting multiple sclerosis, Sj gren's, or systemic lupus erythematosus did not induce a response in the cultures. We hypothesize that binding of the NMO IgG to AQP4 induces a cellular response that results in transcriptional and translational events within the astrocyte that are consistent with a reactive and inflammatory phenotype. Strategies aimed at reducing the inflammatory response of astrocytes may short circuit an amplification loop associated with NMO lesion development.

  5. Frequency of cytomegalo virus igm and igg in pre renal transplant donors and recipients

    International Nuclear Information System (INIS)

    One of the most opportunistic infection in kidney transplant recipients is Cytomegalovirus. This study was conducted to find the frequency of cytomegalo- virus IgM and IgG in kidney transplant donors and recipients. Methods: We carried out retrospective analysis of laboratory values of cytomegalovirus IgG and IgM antibodies of all donors and recipients presented from 2006 to 2013 to National Institute of Kidney diseases Sheikh Zayed Hospital Lahore Pakistan. Results: Total no. of patients were 410 (205 donors and 205 recipients). Among recipients 169 (82%) were male and 36 (18%) female while among donors 125 (60%) were male and 80(40%) female. Total 05 (2.4 %) recipients were CMV IgG negative and 03 (1.4%) CMV IgM positive. Out of two hundred five recipients 200 (98%) were IgG positive and 202 (99%) were IgM negative. All the donors were CMV IgM negative and CMV IgG positive. Conclusion: There is very high frequency of CMV IgM and IgG positivity in donors and recipient of renal transplant in our population so we should consider prophylactic therapy. (author)

  6. Dose-dependent platelet stimulation and inhibition induced by anti-PIA1 IgG

    International Nuclear Information System (INIS)

    The PIA1 antibody produces several clinically distinct and severe thrombocytopenias. Investigations have demonstrated divergent effects on platelet function; prior reports demonstrated inhibition, while a conflicting publication showed platelet activation. We have resolved this conflict using anti-PIA1 IgG produced by a patient with posttransfusion purpura. Relatively low concentrations stimulated platelet aggregation and release of adenosine triphosphate (ATP) whereas high concentrations inhibited platelet function, producing a thrombasthenia-like state. The number of molecules of platelet-associated IgG necessary to initiate aggregation and ATP release (2,086 +/- 556) or produce maximum aggregation (23,420 +/- 3,706) or complete inhibition (63,582 +/- 2654) were measured with a quantitative radiometric assay for bound anti-PIA1. Preincubation of platelets with high concentrations of PIA1 antibody inhibited platelet aggregation with 10 mumol/L adenosine diphosphate and blocked 125I-labeled fibrinogen platelet binding. Platelet activation with nonfibrinogen dependent agonist, 1 U/ml thrombin, was not inhibited by this high concentration of PIA1 IgG. In conclusion, anti-PIAI IgG produces (1) stimulation of platelet aggregation and ATP release that is initiated with 2000 molecules IgG per platelet and is associated with an increase of 125I-fibrinogen binding; (2) conversely, inhibition of platelet aggregation is observed with maximum antibody binding, 63,000 molecules IgG per platelet, and is mediated via a blockade of fibrinogen binding

  7. Utility of FDG PET/CT in IgG4-related systemic disease

    Energy Technology Data Exchange (ETDEWEB)

    Nakatani, K., E-mail: koyakn@kuhp.kyoto-u.ac.jp [Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, Sakyo-ku, Kyoto (Japan); Nakamoto, Y.; Togashi, K. [Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, Sakyo-ku, Kyoto (Japan)

    2012-04-15

    IgG4-related systemic disease (IgG4-RSD) is an emerging clinical entity about which much remains to be elucidated, in terms of its aetiology, pathogenesis, diagnosis, treatment and outcome. Autoimmune pancreatitis (AIP) and Mikulicz disease (MD) are the two major, well-studied constituents of IgG4-RSD. AIP and MD have common characteristics of forming tumour-mimicking lesions that consist of lymphoplasmacytic infiltrates and fibrosclerosis with numerous immunoglobulin G4 (IgG4)-positive plasma cells, as well as various multi-organ manifestations of IgG4-RSD. 2-[{sup 18}F]-fluoro-2-deoxy-D-glucose positron-emission tomography/ computed tomography (FDG PET/CT) enables the acquisition of whole-body images and provides functional information about disease activity; as such it has a valuable role in staging extent of disease, guiding biopsy, and monitoring response to treatment. However, FDG PET/CT is likely to be only one component of the management strategy, and clinical, laboratory, imaging and histological findings are crucial in the overall diagnosis of the condition. At present FDG PET/CT does not have a well-established role in the assessment of patients with IgG4-RSD and future prospective studies are required to define the cost-effectiveness and clinical impact in this patient group more accurately.

  8. Active Immunity Induced by Passive IgG Post-Exposure Protection against Ricin

    Directory of Open Access Journals (Sweden)

    Charles Chen Hu

    2014-01-01

    Full Text Available Therapeutic antibodies can confer an instant protection against biothreat agents when administered. In this study, intact IgG and F(ab’2 from goat anti-ricin hyperimmune sera were compared for the protection against lethal ricin mediated intoxication. Similar ricin-binding affinities and neutralizing activities in vitro were observed between IgG and F(ab’2 when compared at the same molar concentration. In a murine ricin intoxication model, both IgG and F(ab’2 could rescue 100% of the mice by one dose (3 nmol administration of antibodies 1 hour after 5 × LD50 ricin challenge. Nine days later, when the rescued mice received a second ricin challenge (5 × LD50, only the IgG-treated mice survived; the F(ab’2-treated mice did not. The experimental design excluded the possibility of residual goat IgG responsible for the protection against the second ricin challenge. Results confirmed that the active immunity against ricin in mice was induced quickly following the passive delivery of a single dose of goat IgG post-exposure. Furthermore, it was demonstrated that the induced active immunity against ricin in mice lasted at least 5 months. Therefore, passive IgG therapy not only provides immediate protection to the victim after ricin exposure, but also elicits an active immunity against ricin that subsequently results in long term protection.

  9. Early diagnosis of congenital toxoplasmosis in newborn infants using IgG subclasses against two Toxoplasma gondii recombinant proteins

    Directory of Open Access Journals (Sweden)

    Carlos Henryque de Souza e Silva

    2012-05-01

    Full Text Available The aim of this work was to evaluate the utility of ELISA-based testing of total IgG (IgGt antibodies and its subclasses (IgG1, IgG2, IgG3 and IgG4 against soluble (STAg and recombinant (rSAG1 and rMIC3 antigens of Toxoplasma gondii for diagnosing congenital toxoplasmosis. Sera from 217 newborns initially testing positive for specific IgM in filter paper dried blood spots were tested for specific IgM and IgG by ELFA-VIDAS®. Congenital toxoplasmosis was confirmed in 175 and ruled out in 42 infants. The validity of the ELISA tests was determined using the persistence of IgG antibodies (ELFA-VIDAS® kit at the end of 12 months, which is considered the reference test for the diagnosis of congenital toxoplasmosis. The frequency of positivity with IgGt against STAg, rSAG1 and rMIC3 was found in 97.2%, 96.3% and 80.2%, respectively, of the newborns with confirmed congenital toxoplasmosis. IgG1 reacted with all three antigens, while IgG3 and IgG4 reacted preferentially with rMIC3. Higher mean values of reactivity (sample optical density/cut-off were found for all subclasses when using rMIC3. All of the antigens showed high sensitivity and low specificity in detecting anti-T. gondii IgGt and IgG1 and low sensitivity and high specificity in detecting IgG3 and IgG4. In conclusion, the combined detection of IgG antibody subclasses against recombinant toxoplasmic antigens may be useful for the early diagnosis of congenital toxoplasmosis.

  10. Diferencias en variables de personalidad en sujetos adictos a drogas con y sin conductas violentas contra la pareja

    OpenAIRE

    Arteaga, Alfonso; Fernández-Montalvo, Javier; José J. López-Goñi

    2012-01-01

    Este estudio explora las diferencias en características de personalidad de pacientes en tratamiento por adicción a drogas, comparando aquellos que han presentado conductas violentas contra la pareja con aquellos que no. Participaron 125 sujetos en tratamiento en los programas de la Fundación Proyecto Hombre Navarra. Fueron evaluadas variables sociodemográficas y de consumo de sustancias (EuropASI), las conductas violentas contra la pareja (CTS-2), la respuesta in...

  11. Pressure Measurement on Casing Wall and Blade Rows Interaction of Contra-Rotating Axial Flow Pump

    Institute of Scientific and Technical Information of China (English)

    Toru SHIGEMITSU; Tomoya TAKANO; Akinori FURUKAWA; Kusuo OKUMA; Satoshi WATANABE

    2005-01-01

    @@ An application of contra-rotating rotors has been proposed against a demand for developing higher specific speed axial flow pump. The blade rows interaction between front and rear rotors should be clarified for its stable operation and reduction of unsteady losses. In this paper, the static pressure distributions on casing wall are provided by measuring with the phase locked sampling method. The measurements are carried out for two types of the rear rotors with different blade number and chord length, and it is found that, for both types of rotors, the unsteady pressure fluctuations are more remarkable in the front rotor than in the rear rotor and they are caused by the rear rotor pressure field. The effects of pressure fluctuations will be discussed in more details toward understanding the blade rows interaction in the contra-rotating axial flow pump.

  12. Programa de acción nacional contra la desertificación

    OpenAIRE

    García Camarero, Julio

    2001-01-01

    La Dirección General de Conservación de la Naturaleza del Ministerio de Medio Ambiente español elabora desde hace siete años el programa de acción nacional contra la desertificación (PAND). Este Programa es consecuencia de la ratificación por parte del Estado español de los acuerdos de la cumbre de Río o de la Tierra de 1992, plasmados en el Convenio Mundial de lucha contra la desertificación de 1994. La Dirección General envió en enero de 2001 el documento en elaboración del PAND a diversas ...

  13. Antiradiation Antitoxin IgG : Immunological neutralization of Radiation Toxins at Acute Radiation Syndromes.

    Science.gov (United States)

    Popov, Dmitri; Maliev, Slava

    Introduction: High doses of radiation induce apoptotic necrosis of radio-sensitive cells. Mild doses of radiation induce apoptosis or controlled programmed death of radio-sensitive cells with-out development of inflammation and formation of Radiation Toxins. Cell apoptotic necrosis initiates Radiation Toxins (RT)formation. Radiation Toxins play an important role as a trig-ger mechanism for inflammation development and cell lysis. If an immunotherapy approach to treatment of the acute radiation syndromes (ARS) were to be developed, a consideration could be given to neutralization of radiation toxins (Specific Radiation Determinants-SRD) by specific antiradiation antibodies. Therapeutic neutralization effects of the blocking anti-radiation antibodies on the circulated RT had been studied. Radiation Toxins were isolated from the central lymph of irradiated animals with Cerebrovascular(Cv ARS),Cardiovascular (Cr ARS),Gastrointestinal(Gi ARS) and Haemopoietic (Hp ARS) forms of ARS. To accomplish this objective, irradiated animals were injected with a preparation of anti-radiation immunoglobulin G (IgG) obtained from hyperimmune donors. Radiation-induced toxins that we call Specific Radiation Determinants (SRD) possess toxic (neurotoxic, haemotoxic) characteristics as well as specific antigenic properties. Depending on direct physiochemical radiation damage, they can induce development of many of the pathological processes associated with ARS. We have tested several specific hyperimmune IgG preparations against these radiation toxins and ob-served that their toxic properties were neutralized by the specific antiradiation IgGs. Material and Methods: A scheme of experiments was following: 1.Isolation of radiation toxins (RT) from the central lymph of irradiated animals with different form of ARS. 2.Transformation of a toxic form of the RT to a toxoid form of the RT. 3.Immunization of radiation naive animals. Four groups of rabbits were inoculated with a toxoid form of SRD

  14. La Economia Chilena Frente a la Crisis Financiera: Respuestas Contra-Ciclicas y Desafios Pendientes

    OpenAIRE

    Ricardo Ffrench-Davis; Rodrigo Heresi

    2014-01-01

    Ante el contagio de la crisis financiera internacional, la economia chilena experimento una intensa reduccion del precio del cobre y de los influjos de capitales. Consecuentemente, la demanda agregada y el empleo de trabajo y capital productivo se contrajeron hacia fines de 2008. En ese escenario, a diferencia de la reaccion frente al contagio de la crisis asiatica, la autoridad economica adopto un amplio conjunto de politicas publicas contra-ciclicas, caracterizadas principalmente por un aum...

  15. Influence of manufacturing procedure on stability of Unguentum contra perniones preparations

    OpenAIRE

    Bošković Mirjana; Toskić-Radojičić Marija

    2005-01-01

    Background. Application of various technological procedures for the manufacture of officinal preparation ointment against chilblains (Unguentum contra perniones) produce essential variations in the quality and stability of the final product. Changing the sequence of admixing active substances into the ointment base indicated the presence of incompatibility between the active substances, as well as between the active substances and the ointment base components. The aim was to examine the influ...

  16. IgG2 immunodeficiency: association to pediatric patients with bacterial meningoencephalitis Inmunodeficiencia de IgG2: asociación en pacientes pediátricos con meningoencefalitis bacterianas

    Directory of Open Access Journals (Sweden)

    XIOMARA ESCOBAR-PÉREZ

    2000-03-01

    Full Text Available An IgG subclass deficiency is often associated with bacterial infections. We studied four pediatric patients suffering from meningoencephalitis, two of them due to Streptococcus pneumoniae and two due to Haemophilus influenzae type b. Simultaneous diagnostic serum and cerebrospinal fluid samples were taken during income. The four subclasses of IgG and albumin were quantified in both biologic fluids by radial immunodiffusion. Very low levels of seric IgG2 with non detectable cerebrospinal fluid IgG2 were found in the patients. No intrathecal IgG subclass synthesis was found in two patients. One patient with S. pneumoniae had IgG3 intrathecal synthesis. Intrathecal IgG1, IgG3 and IgG4 synthesis was found in one patient suffering from H. influenzae according with reibergrams. Substitutive therapy with intravenous gammaglobulin was given to the patients as part of the treatment.Las deficiencias por subclases de IgG se asocian frecuentemente con infecciones de origen bacteriano. Se estudian cuatro pacientes en edad pediátrica con meningoencefalitis, dos de ellos a Streptococcus pneumoniae y dos a Haemophilus influenzae tipo b. Se toman muestras simultáneas diagnósticas de suero y líquido cefalorraquídeo en el momento del ingreso. Se cuantificaron las cuatro sublclases de IgG y albúmina en ambos líquidos biológicos por inmunodifusión radial. Se encontró que los pacientes presentaban cifras muy disminuidas de IgG2 sérico y ningun exhibia IgG2 en el líquido cefalorraquídeo. Dos pacientes no sintetizaron ninguna subclase de IgG intratecalmente. Un paciente con S. pneumoniae sintetizó IgG3 intratecal. Uno de los pacientes con meningoencefalitis a H. influenzae sintetizó IgG1, IgG3 e IgG4 intratecalmente de acuerdo com el reibergrama. Estos pacientes recibieron terapia substitutiva com gammaglobulina intravenosa como parte de la medicación.

  17. Prevalência de anticorpos IgG antiparvovírus B19 em gestantes durante o atendimento pré-natal e casos de hidropisia fetal não imune atribuídos ao parvovírus B19, na Cidade do Rio de Janeiro Anti-parvovirus B19 IgG antibody prevalence in pregnant women during antenatal follow-up and cases of non-immune hydropsis fetalis due to parvovirus B19, in the City of Rio de Janeiro

    Directory of Open Access Journals (Sweden)

    André Ricardo Araujo da Silva

    2006-10-01

    Full Text Available Com o objetivo de medir a prevalência de anticorpos IgG contra o parvovírus B19 em gestantes com até 24 semanas de idade gestacional e detectar a ocorrência de casos de hidropisia fetal não-imune atribuídos a esse vírus, coletamos 249 amostras de soro em uma maternidade de referência na cidade do Rio de Janeiro, entre junho de 2003 e março de 2005. As gestantes foram acompanhadas até o termo da gestação, sendo detectados 17 casos de hidropisia fetal. Quatro casos foram atribuídos ao parvovírus B19 e dois destes ocorreram em gestantes residentes na zona oeste da cidade, em fevereiro de 2005. Resultados positivos para anticorpos IgG antiparvovírus B19 foram encontrados em 172 (71,6% gestantes (IC 95% 65,5-77,7%, sendo esta prevalência de anticorpos comparável à encontrada em outras cidades brasileiras. A única variável associada com aquisição prévia de anticorpos IgG foi número de gestações anteriores maior que um(p= 0,02, IC 95% 0,36-0,94.With the aim of measuring the prevalence of anti-parvovirus B19 IgG antibodies during pregnancy up to 24 weeks of gestation and detecting cases of nonimmune hydrops fetalis, 249 sera from pregnant women attending a reference hospital in Rio de Janeiro city, from June 2003 to November 2004 were collected. They were followed-up until the end of pregnancy, with 17 cases of fetal hydrops detected. Four cases were caused by parvovirus B19 and two of them occurred in pregnant women living in the western zone of the city, during February 2005. Anti-parvovirus B19 IgG antibodies were found in 172 (71.6% pregnant women (CI 95% 65.5%-77.7%; this antibody prevalence is similar to results found for others Brazilian cities. The only variable associated with previous acquisition of IgG antibodies to parvovirus B19 was number of pregnancies greater than one (p= 0.02, CI 95% 0.36-0.94.

  18. El potencial de la inmunomodulación con anticuerpos monoclonales anti-CD137 (4-1BB para terapia de enfermedades malignas e infecciones virales crónicas The immunotherapy potential of agonistic anti-CD137 (4-1BB monoclonal antibodies for malignancies and chronic viral diseases

    Directory of Open Access Journals (Sweden)

    C. Alfaro

    2006-04-01

    Full Text Available La manipulación farmacológica del sistema inmunitario para conseguir respuestas linfocitarias de mayor intensidad tiene aplicación potencial en inmunoterapia tumoral y en el tratamiento de enfermedades virales crónicas. Los anticuerpos monoclonales inmunoestimuladores se definen como una familia de fármacos que aumentan la respuesta inmunitaria al interaccionar como ligandos artificiales con proteínas funcionales del sistema inmunitario, activando o inhibiendo su función. Hay anticuerpos monoclonales humanizados dirigidos frente al receptor inhibidor linfocitario CD152 (CTLA-4 que se están probando en ensayos clínicos con evidencia de actividad antitumoral, aunque con la contrapartida de producir reacciones autoinmunitarias severas. Los anticuerpos anti-CD137 tienen la capacidad de inducir potentes respuestas inmunitarias, mediadas principalmente por linfocitos T citotóxicos, con el resultado de erradicar tumores transplantables de ratón de forma comparativamente superior a los anticuerpos frente a CD152. CD137 (4-1BB es un antígeno de diferenciación expresado selectivamente en la superficie de linfocitos T y NK activados y sobre células dendríticas. Los anticuerpos monoclonales que actúan como ligandos artificiales estimuladores de este receptor (anticuerpos monoclonales agonistas anti-CD137 potencian la inmunidad celular antitumoral y antiviral en modelos experimentales murinos. Paradójicamente, estos mismos anticuerpos previenen o mejoran el curso de enfermedades autoinmunitarias establecidas en ratones como modelo. A la luz de estos datos experimentales, varios grupos de investigación han procedido a la humanización de anticuerpos dirigidos frente a CD137 humano y se plantea la inminente realización de los primeros ensayos clínicos.Pharmacological intervention on the immune system to achieve more intense lymphocyte responses has potential application in tumour immunology and in the treatment of chronic viral diseases

  19. Expression of murine Fc receptors for IgG.

    Science.gov (United States)

    Schreiber, R E; Buku, A; Unkeless, J C

    1990-06-15

    There are two distinct genes that encode murine low affinity Fc gamma RII, murine Fc gamma RII alpha, and murine Fc gamma RII beta, which are transcribed in specific cell lineages. Fc gamma RII alpha transcripts are present in macrophages, NK cells, and mesangial cells; Fc gamma RII beta transcripts are expressed in Fc gamma R-bearing B cells, T cells, and macrophages. We have devised a sandwich ELISA to quantify the expression of Fc gamma RII alpha protein. The ELISA is specific for Fc gamma RII alpha, and does not detect the closely related Fc gamma RII beta protein. Upon stimulation with IFN-gamma the Fc gamma RII beta- macrophage cell line J774a expressed a twelvefold enhanced level of Fc gamma RII alpha protein. Peritoneal macrophages synthesized varying amounts of Fc gamma RII alpha. High levels of Fc gamma RII alpha were observed in resident and thioglycollate-elicited peritoneal macrophages, but no Fc gamma RII alpha was detected in Bacillus Calmette Guérin-elicited macrophages. J774a cells stimulated with rIL-6 bound approximately twice as much anti-Fc gamma RII mAb 2.4G2 IgG as did unstimulated controls. However, the Fc gamma RII alpha-specific ELISA showed no change in the amount of Fc gamma RII alpha expressed. A probe encompassing the extracellular coding sequence of Fc gamma RII beta hybridized to two distinct transcripts that were elevated in rIL-6-stimulated J774a cells. One of these transcripts had the same mobility in electrophoresis as Fc gamma RII alpha mRNA and hybridized to an Fc gamma RII alpha-specific probe, whereas the other transcript was larger and did not hybridize to probes specific for either Fc gamma RII alpha or Fc gamma RII beta. Moreover, we confirmed, with an Fc gamma RII beta-specific probe, that J774a cells do not make Fc gamma RII beta mRNA. Thus, the larger transcript appears to encode a novel Fc gamma RII. We suggest that the increased level of binding of the anti-Fc gamma RII mAb 2.4G2 to rIL-6-induced cells represents

  20. Performance Test and Flow Measurement of Contra-Rotating Axial Flow Pump

    Institute of Scientific and Technical Information of China (English)

    Akinori Furukawa; Toru Shigemitsu; Satoshi Watanabe

    2007-01-01

    An application of contra-rotating rotors has been proposed against a demand for developing higher specific speed axial flow pump. In the present paper, the advantage and disadvantage of using contra-rotating rotors are described in comparison with conventional type of rotor-stator, based on theoretical and experimental investigations. The advantages are as follows: (1) The pump is inherently designed as smaller sized and at lower rotational speed. (2) A stable head-characteristic curve for flow rate with negative slope appears. (3)As the rear rotor rotational speed is varied as independent control of front rotor, the wider range of high performance operation is obtained by rear rotor speed control in addition to front rotor speed control. The disadvantages are as follows: (1) The structure of double shaft system becomes complex. (2) The pump performance is inferior at over flow rate as the rear rotor loading is weakened. (3) The blade rows interaction from rear rotor to front rotor more strongly appears. Then the rear rotor design is a key to achieve higher pump performance. Some methods to overcome these disadvantages will be discussed in more details toward wider usage of contra-rotating axial flow pump in various industrial fields.

  1. Perspectivas para el desarrollo de vacunas e inmunoterapia contra cáncer cervicouterino

    Directory of Open Access Journals (Sweden)

    GUZMÁN-ROJAS LILIANA

    1998-01-01

    Full Text Available El cáncer cervicouterino representa un grave problema de salud pública, debido a la asociación de la neoplasia con el virus del papiloma humano; actualmente se realizan estudios usando estrategias dirigidas a combatir este patógeno, mediante vacunas, que podrían ser de gran utilidad para el control de la progresión de la enfermedad. El estudio tanto de la inmunología humoral como celular ha servido para el desarrollo de vacunas. Así, la utilización de partículas virales sintéticas para el estudio de anticuerpos neutralizantes y el uso de proteínas tempranas virales, entre otras, para la inducción de inmunidad mediada por células, han sido la pauta para realizar estudios que dirijan la respuesta inmune para prevenir la infección celular tanto hacia células infectadas no transformadas como hacia células transformadas viralmente con resultados favorables.

  2. APPRAISAL OF PRENATAL ANTI-TOXOPLASMA GONDII (IGG+IGM)- IHA/IGM-ELISA SCREENING IN SINGLE SAMPLES VIA IGG AVIDITY TEST.

    Science.gov (United States)

    El-Bali, Mohammed; Zaglool, Dina A M; Khodari, Yousif A W; Al-Harthi, Saeed A

    2016-04-01

    Congenital toxoplasmosis is associated with important morbidity and mortality. Since vertical transmission of Toxoplasma gondii can occur in acute cases, antenatal screening for recent infections is vital. Accurate determination of acute toxoplasmosis requires a combination of immunoassays, usually not routinely applied for screening purposes. This study evaluated the anti-T. gondii (IgG+IgM)/IgM prenatal screening procedure by IgG avidity assay. The routine prenatal screening for (IgG+IgM) anti-T. gondii by indirect hemagglutination (IHA) in serum samples was done of 2247 pregnant women who attended two hospitals between 2011 and 2013 revealed 487 (21.7%) positive samples. Examination of IHA-positive sera by IgM and IgG/IgG-avidity concurrent ELISA tests revealed 7 positive and 3 border-line IgM-ELISA titers during the initial check-up of 10 women, who were then followed up at 3-4 week-intervals. Among these, 4 (40%) showed simultaneous high avidity IgG antibodies, indicating distant infection by the parasite, and no anti-T. gondii specific IgG could be detected in follow-up sera of two cases (20%), indicating false IgM initial positive results. Only 4 (40%) women showed simultaneous IgM and low avidity IgG antibodies indicating active infections. Avoidance of an over-diagnosis of acute toxoplasmosis Anti-T. gondii (IgG+IgM)/IgM prenatal screening must be supplemented by a discriminative test like IgG avidity ELISA. PMID:27363056

  3. Reference ranges and cutoff levels of pneumococcal antibody global serum assays (IgG and IgG2) and specific antibodies in healthy children and adults.

    Science.gov (United States)

    Rose, M A; Buess, J; Ventur, Y; Zielen, S; Herrmann, E; Schulze, J; Schubert, R

    2013-08-01

    Pneumococcal antibodies represent the acquisition of natural immunity. Determination of pneumococcal antibodies is an important screening tool for immunodeficiencies. Our study generated reference ranges and cutoff levels for pneumococcal antibody global serum assays correlated to a specific pneumococcal antibody ELISA. Specific pneumococcal antibody levels were measured from 457 children undergoing elective surgery and 46 healthy adult volunteers (88 with previous pneumococcal immunization from both groups), 22 severe immunodeficient subjects with ataxia telangiectasia (A-T, negative controls), and age-matched 36 healthy allergic asthmatics. We determined a representative panel of serotype-specific pneumococcal antibodies (serotype 4, 5, 6B, 7F, 14, 18C, 19F, 23F) by ELISA and global pneumococcal IgG and IgG2 antibodies by EIA. In vaccine-naïve healthy subjects, initial pneumococcal IgG geometric mean concentrations of 13.1 μg/ml were low in the first year of life and increased over the time, reaching adult levels (70.5 μg/ml) at age 8-12 years. In parallel, IgG2 antibodies increased from 20.7 % (0.5-1 year old) to adult proportions (>30 %) in preschoolers. Correlation between the pneumococcal IgG screening assay and specific pneumococcal antibody levels was acceptable (Pearson's coefficient r = 0.4455; p = 0.001). Cutoff levels showed high sensitivity, whereas specificity was high to moderate calculated from correlations with the specific ELISA. We provide reference ranges and cutoff levels for the interpretation of specific antibody determinations in the clinical setting. The global pneumococcal IgG/IgG2 assay is a suitable screening tool and correlates with the ELISA serotype-specific pneumococcal antibodies. However, results below our cutoff values should be re-evaluated by serotype-specific ELISA testing. PMID:23529214

  4. Unusual IgG4-related hypophysitis: one case report and analysis of clinicopathological characteristics

    Directory of Open Access Journals (Sweden)

    Zhen-qi LI

    2014-10-01

    Full Text Available Background Immunoglobulin G4 (IgG4-related disease is a recently characterized autoimmune disease entity marked by elevated serum IgG4 levels and tissue infiltration by IgG4-positive plasma cells in multiple involved organs. Hypophysitis is a rare inflammatory disorder and IgG4-related sclerosing disease involving the ituitary alone is especially rare. Imaging studies may reveal a mass lesion in the sellar area or a thickening of pituitary stalk, mimicking a pituitary tumor. Due to its rarity and non-specific appearance in radiological examination, it is a diagnostic challenge for clinicians and histopathologists to differentiate solitary IgG4-related hypophysitis from other pituitary lesions. The aim of this study is to summarize the clinicopathological features of unusual IgG4-related hypophysitis and discuss the differential diagnosis of histologically similar inflammatory lesions in pituitary. Methods The clinical manifestation of a patient with solitary IgG4-related hypophysitis was presented retrospectively. Resected mass was routinely paraffin-embedded and stained with Hematoxylin and Eosin. Dako EnVision immunohistochemical staining system was used to detect the tumor antigen expressions, including vimentin (Vim, S-100 protein (S-100, pan cytokeratin (PCK, epithelial membrane antigen (EMA, CD3, CD20, CD68, CD1a, κ-light chain, λ-light chain and progestrone receptor (PR.  Results A 47-year-old male patient presented with 1-year history of mild limb weakness and hyposexuality. Laboratory examination revealed hypopituitarism with low levels of serum testosterone, cortisol, luteinizing hormone (LH and follicle stimulating hormone (FSH, although his serum IgG4 level was high. MRI of the pituitary gland revealed a mass lesion in the sellar area with T1WI mild hyperintense and homogeneous enhancement after gadolinium administration. The patient underwent a transsphenoidal mass resection of the pituitary gland. Histological examination

  5. Use of IgG avidity ELISA to differentiate acute from persistent infection with Salmonella Dublin in cattle

    DEFF Research Database (Denmark)

    Hansen, K.R.; Nielsen, L.R.; Lind, Peter

    2006-01-01

    Aims: To investigate whether an immunoglobulin (Ig)G avidity ELISA can be used to differentiate between acute and persistent infection with Salmonella (S.) Dublin in cattle. To determine whether the IgG isotype, IgG(1) and IgG(2) responses in acute and persistent infections differ. Methods and...... calculated for IgG (IgG-AI), IgG(1) (IgG(1)-AI) and IgG(2) (IgG(2)-AI). The mean IgG-AI for suspected carrier animals with either persistently high (group 1) or persistently high to medium high (group 2) antibody levels was significantly (P = 0.003) higher (32.1% and 38.4%) than for acutely infected animals...... (21.7% and 22.3%). The probability of being a suspect carrier was associated with IgG-AI, antibody level in the sample and age. However, the effect of age could be the result of a biased sample selection. Specificities and sensitivities were calculated at a range of cut-off values for IgG-AI and IgG(1...

  6. Conformational difference in human IgG2 disulfide isoforms revealed by hydrogen/deuterium exchange mass spectrometry.

    Science.gov (United States)

    Zhang, Aming; Fang, Jing; Chou, Robert Y-T; Bondarenko, Pavel V; Zhang, Zhongqi

    2015-03-17

    Both recombinant and natural human IgG2 antibodies have several different disulfide bond isoforms, which possess different global structures, thermal stabilities, and biological activities. A detailed mapping of the structural difference among IgG2 disulfide isoforms, however, has not been established. In this work, we employed hydrogen/deuterium exchange mass spectrometry to study the conformation of three major IgG2 disulfide isoforms known as IgG2-B, IgG2-A1, and IgG2-A2 in two recombinant human IgG2 monoclonal antibodies. By comparing the protection factors between amino acid residues in isoforms B and A1 (the classical form), we successfully identified several local regions in which the IgG2-B isoform showed more solvent protection than the IgG2-A1 isoform. On the basis of three-dimensional structural models of IgG2, these identified regions were located on the Fab domains, close to the hinge, centered on the side where the two Fab arms faced each other in spatial proximity. We speculated that in the more solvent-protected B isoform, the two Fab arms were brought into contact by the nonclassical disulfide bonds, resulting in a more compact global structure. Loss of Fab domain flexibility in IgG2-B could limit its ability to access cell-surface epitopes, leading to reduced antigen binding potency. The A2 isoform was previously found to have disulfide linkages similar to those of the classical A1 isoform, but with different biophysical behaviors. Our data indicated that, compared to IgG2-A1, IgG2-A2 had less solvent protection in some heavy-chain Fab regions close the hinge, suggesting that the A2 isoform had more flexible Fab domains. PMID:25730439

  7. IgG4-related disease: current challenges and future prospects

    Directory of Open Access Journals (Sweden)

    Lang D

    2016-02-01

    Full Text Available David Lang,1 Jochen Zwerina,2 Herwig Pieringer1,3 1Second Department of Internal Medicine, Kepler University Clinic, Linz, 2First Department of Internal Medicine, Ludwig Boltzmann-Institute of Osteology, Hanusch Hospital, Vienna, 3Paracelsus Private Medical University, Salzburg, Austria Abstract: Immunoglobulin G4-related disease (IgG4-RD represents an immune-mediated fibroinflammatory condition with a characteristic histopathological appearance that can affect various organs. Although numerous single-organ manifestations have been described more than a century ago, its systemic nature and unique features were only discovered in the last 2 decades, when IgG4-RD emerged as a new entity of disease. IgG4-RD is usually considered a rare disease, but its true epidemiology has not yet been fully clarified. Also, despite recent advances in the identification of the underlying immunological processes, its pathophysiology is only incompletely understood till now. The diagnostic workup of IgG4-RD is complex and usually requires a combination of clinical examination, imaging, histological, and serological analyses. However, no finding alone is specific for IgG4-RD. Therefore, its diagnosis requires careful interpretation of examination results in context with the patient’s clinical appearance as well as the exclusion of a broad variety of differential diagnoses. The past years brought rapid advances concerning this novel disease entity: diagnostic criteria, further insights into the underlying immunological processes, new biomarkers, and novel therapeutic approaches were proposed and widened the knowledge in the field of IgG4-RD. Still, a greater number of questions remain unanswered, and many recent developments require further discussion and proof from clinical trials. This review should give an overview on current knowledge and future perspectives in epidemiology, pathophysiology, diagnosis, and therapy of IgG4-RD. Keywords: PET/CT, autoimmune

  8. IgG4-Related Esophageal Disease Presenting as Esophagitis Dissecans Superficialis With Chronic Strictures.

    Science.gov (United States)

    Dumas-Campagna, Myriam; Bouchard, Simon; Soucy, Genevieve; Bouin, Mickael

    2014-08-01

    IgG4-related disease is a recently recognized autoimmune systemic disorder that has been described in various organs. The disease is characterized histologically by a dense lymphoplasmocytic infiltrate of IgG4-positive cells, storiform fibrosis and can be associated with tumefactive lesions. IgG4-related disease involving the upper gastrointestinal tract is rare and only two previous case reports have reported IgG4-related esophageal disease. We report the case of a 63-year-old female patient with a long-standing history of severe dysphagia and odynophagia with an initial diagnosis of reflux esophagitis. Symptoms persisted despite anti-acid therapy and control esophagogastroduodenoscopy (EGD) revealed endoscopic images consistent with esophagitis dissecans superficialis (sloughing esophagitis). An underlying autoimmune process was suspected and immunosuppressant agents were tried to control her disease. The patient eventually developed disabling dysphagia secondary to multiple chronic esophageal strictures. A diagnosis of IgG4-related disease was eventually made after reviewing esophageal biopsies and performing an immunohistochemical study with an anti-IgG4 antibody. Treatment attempts with corticosteroids and rituximab was not associated with a significant improvement of the symptoms of dysphagia and odynophagia, possibly because of the chronic nature of the disease associated with a high fibrotic component. Our case report describes this unique case of IgG4-related esophageal disease presenting as chronic esophagitis dissecans with strictures. We also briefly review the main histopathological features and treatment options in IgG4-related disease. PMID:24883156

  9. Effect of biotherapeutics on antitoxin IgG in experimentally induced Clostridium difficile infection

    Directory of Open Access Journals (Sweden)

    S Kaur

    2012-01-01

    Full Text Available Purpose: Recurrent diarrhoea after successful treatment of primary Clostridium difficile associated disease (CDAD occurs due to bowel flora alterations and failure to mount an effective antibody response. Apart from antibiotics, risk factors include immunosuppressive and acid-suppressive drug administration. Biotherapeutics such as probiotic and epidermal growth factor (EGF may offer potential effective therapy for CDAD. Materials and Methods: The effect of biotherapeutics in mounting an antibody response against C. difficile toxins was studied in BALB/c mice challenged with C. difficile after pre-treatment with ampicillin, lansoprazole or cyclosporin. Sera from sacrificed animals were estimated for antitoxin IgG by enzyme linked immunosorbent assay. Results: Antitoxin IgG was significantly higher (P0.05 in animals in which C. difficile was given after pre-treatment with cyclosporin compared to those without any pre-treatment, or pre-treatment with antibiotic or lansoprazole. In inter-subgroup comparisons also significant anomaly in production of antitoxin IgG was found. The antitoxin IgG levels were raised in animals administered C. difficile after pre-treatment with ampicillin, but lower in animals administered cyclosporin. High levels of antitoxin IgG were also found in the serum samples of animals receiving lansoprazole and C. difficile. Conclusions: Probiotics showed their beneficial effect by boosting the immune response as seen by production of antitoxin IgG. Oral administration of EGF did not affect the immune response to C. difficile toxins as significant increase was not observed in the serum antitoxin IgG levels in any of the groups investigated.

  10. Conformational plasticity of IgG during protein A affinity chromatography.

    Science.gov (United States)

    Gagnon, Pete; Nian, Rui

    2016-02-12

    Single step elution of a protein A column with 100mM acetate pH 3.5 produced a curvilinear gradient with pH dropping steeply at first then more gradually as it approached endpoint. IgG with a native hydrodynamic diameter of 11.5 nm began to elute at pH 6.0 with a size of 9.4 nm. IgG size continued to decrease across the peak, reaching a minimum of 2.2 nm at pH 3.9. Secondary structure of early eluting IgG was only mildly affected but later eluting fractions became increasingly non-native with the 2.2 nm population exhibiting the highest proportion of β-sheet and lowest random coil of all conformations. Size reduction and structural change of IgG through this portion of the elution peak were attributed dominantly to a pre-existing tendency of highly concentrated IgG to adopt reduced size conformations at low pH and conductivity, facilitated by the known conformational relaxation of IgG by its interaction with protein A. IgG size increased to 10.4 nm as elution pH approached 3.5 across the tailing fractions. Major loss of β-sheet and increase of α-helix and random coil were observed in parallel. Late elution of this population was attributed to it being eluted from interactions with 2 distinct protein A domains, one bound to each side of the Fc region, creating a higher dissociation constant than single-site Fc-protein A interactions, and requiring more severely disruptive conditions for elution. The high degree of conformational disruption was attributed to simultaneous interaction of both heavy chains with protein A. PMID:26805601

  11. IgG4-related disease: A relatively new concept for clinicians.

    Science.gov (United States)

    Vasaitis, Lilian

    2016-01-01

    IgG4-related disease (IgG4-RD) is a recently recognized chronic fibrotic inflammation, which can affect almost every organ, and may come to clinical attention first due to visible organ swelling or organ dysfunction, or is identified incidentally by imaging and specific biopsy. The disorder has an allergic background and is immune-mediated. Up-regulated responses of T helper 2 and T regulatory cells and their cytokines play a major role in disease progression. About 30-50% of patients are atopic or have mild eosinophilia. IgG4-RD predominantly affects middle-aged male patients. The cornerstones of diagnosis of the disease are compatible clinical features and typical histopathology. Swelling of salivary and lacrimal glands, lymphadenopathy, and type 1 autoimmune pancreatitis (AIP) are the most common manifestations of the disease. However, other tissues and organs, such as retroperitoneum, lung, kidney, aorta, upper airways, thyroid gland, meninges, heart, mesenterium and skin may be involved. Typical histopathology is lymphoplasmacytic infiltration abundant in IgG4-positive plasma cells, storiform-type fibrosis, and obliterative phlebitis. Elevated serum IgG4 concentration supports the diagnosis. Characteristic imaging features such as a "capsule-like rim" surrounding the pancreatic lesions is highly specific to type 1 AIP. 18F-fluorodeoxyglucose positron emission tomography/computed tomography enables mapping the sites of inflammation, permits evaluation of the extent of the disease, helps in guiding biopsy decision, and may be used in monitoring response to treatment. Glucocorticoids alone or in combination with B-cell depletion with rituximab induces prompt clinical response to IgG4-RD. This article reviews the current understanding, different clinical manifestations, and approaches to diagnosis and treatment of IgG4-RD. PMID:26481243

  12. OBTENCIÓN DE ANTICUERPOS ESPECÍFICOS PARA LA DETECCIÓN DEL Tamarillo leaf malformation virus (TALMV EN TOMATE DE ÁRBOL Specific Antibodies to Detect Tamarillo leaf malformation virus (TaLMV in Tamarillo

    Directory of Open Access Journals (Sweden)

    YULIANA GALLO GARCÍA

    2011-08-01

    Full Text Available En Colombia el rendimiento del cultivo de tomate de árbol se ha visto seriamente afectado por la expansión de una enfermedad conocida como virosis de tomate de árbol. Esta patología se registró inicialmente en 1991 en el norte de Antioquia y su expansión ha alcanzado todas las regiones cultivadoras de este frutal en el país. Trabajos recientes han detectado la presencia de por lo menos dos especies del género Potyvirus (Potyviridae asociadas a esta enfermedad en los cultivos de tomate de árbol de Antioquia: Potato virus Y (PVY y Tamarillo leaf malformation virus (TaLMV, especie propuesta. Con el fin de reducir la diseminación de estos patógenos virales en el país, es necesario contar con herramientas de diagnóstico que permitan la certificación del material de siembra y la detección temprana en plantas asintomáticas. En este trabajo se obtuvieron anticuerpos policlonales específicos para la detección del virus TaLMV utilizando una región antigénica de 15 residuos de la cápside viral. La sensibilidad y especificidad de los anticuerpos anti-TaLMV fue evaluada mediante pruebas de ELISA y dot-blot utilizando proteína recombinante y péptidos sintéticos como controles. La utilidad de estos anticuerpos fue validada a partir de una prueba piloto de detección de TaLMV en muestras de plantas de tomate de árbol con y sin síntomas de virosis obtenidas en el oriente antioqueño. Los resultados serológicos fueron comparados con los niveles de detección que ofrece la técnica de RT-PCR con cebadores específicos para la cápside viral de TaLMV.In Colombia, yields of tamarillo are seriously affected by a complex viral disease known as virosis. This pathology was first reported in 1991 in the north of Antioquia and currently affects all tamarillo growing regions in the country. Recent works have demonstrated the association of two potyviruses (potyviridae with this disease: Potato virus Y (PVY and Tamarillo leaf malformation virus

  13. Relación entre la prueba intradermica de histoplasmina y los niveles de anticuerpos detectables por ELISA e immunodifusion Relationship between histoplasmin skin test and Histoplasma capsulatum antibody levels detected by ELISA and immunodiffusion tests

    Directory of Open Access Journals (Sweden)

    Carlos M. Fernandez-Andreu

    1994-02-01

    Full Text Available Se realizó un estudio prospectivo en 40 trabajadores de una granja avícola (grupo 1 considerados con riesgo de exposición a Histoplasma capsulatum, agente etiológico de la histoplasmosis, y en 16 individuos sin riesgo profesional de exposición a dicho agente (grupo 2. En ambos grupos se aplicó la prueba intradérmica de histoplasmina y se obtuvo el suero antes de su aplicación y a los 30 y 180 días después de realizada dicha prueba. Se determinó el nivel de anticuerpos anti-H. capsulatum mediante las técnicas de ELISA e inmunodifusión doble. En los dos grupos de población estudiados la aplicación intradérmica de histoplasmina, aún en los casos en que la respuesta fue positiva, no constituyó un estímulo antigénico suficiente para provocar un aumento en los niveles de anticuerpos anti-H. capsulation detectables por las técnicas serológicas empleadas. Los resultados obtenidos contribuyen a la mejor interpretación de la prueba de ELISA en el diagnóstico de la histoplasmosis.A prospective study was carried out in two groups of individuals: a group 1 (n=40 included workers from a poultry farm, with potencial occupational risk of exposure to Histoplasma capsulatum, ethiologic agent of histoplasmosis, and a group 2 (n=16, persons without occupational risk of exposure to the agent. Histoplasmin skin test was performed in both groups, and three sera were obtained from each individual: 1 before skin test was done, 2 30 days after, and 3 180 days after it. In both groups the histoplasmin skin test, even when the test was positive, was not a sufficient antigenic booster to provoque an increase in the H. capsulatum antibody levels capable to be detected by the Serologic tests used (ELISA and Double Immunodiffusion. These results contribute to improve the interpretation of ELISA test values in the diagnosis of histoplasmosis.

  14. Encuesta sobre la realización de las pruebas de detección de los anticuerpos anti-VIH en los laboratorios de Cataluña Survey of HIV testing in laboratories in Catalonia [Spain

    Directory of Open Access Journals (Sweden)

    María Jesús Casado

    2004-02-01

    Full Text Available Para poder interpretar correctamente la epidemia de infección por el VIH, es indispensable garantizar la calidad en la realización del test anti-VIH. Con el objetivo de describir las características durante el proceso analítico e identificar aspectos susceptibles de mejora, en 1998 se realizó una encuesta sobre la garantía de calidad en los laboratorios de Cataluña que realizaban pruebas de detección de anticuerpos anti-VIH. Los resultados de la encuesta muestran la variabilidad de los procesos analíticos llevados a cabo por los diferentes laboratorios para la determinación diagnóstica de anticuerpos anti-VIH. Hay laboratorios que todavía realizan prácticas incorrectas, como identificar especialmente las muestras biológicas VIH, realizar segundas extracciones para pruebas de confirmación y no garantizar la confidencialidad en la entrega de resultados. Sería aconsejable unificar criterios según sea el objetivo de la prueba y la prevalencia de infección en la población analizada. Ello mejoraría la calidad del resultado analítico, ya que el concepto global de calidad incluye todo el proceso (preanalítico, analítico y postanalítico.Quality assurance of HIV testing is essential to correctly assess the HIV epidemic. To describe the characteristics of HIV testing and identify features that could be improved, a questionnaire on the quality of HIV tests was sent to Catalan laboratories in 1998. The survey revealed variability in the procedures used by the participating laboratories when performing HIV tests. Some of the laboratories were still performing incorrect activities such as identifying HIV specimens with specific labels, extracting new specimens for a second test to confirm diagnosis, or failing to guarantee the confidentiality of the results. The criteria for HIV testing should be standardized according to the purpose of the test and the prevalence of the infection in the population analyzed. This approach would improve

  15. Malaria resistance genes are associated with the levels of IgG subclasses directed against Plasmodium falciparum blood-stage antigens in Burkina Faso

    Directory of Open Access Journals (Sweden)

    Afridi Sarwat

    2012-09-01

    Full Text Available Abstract Background HBB, IL4, IL12, TNF, LTA, NCR3 and FCGR2A polymorphisms have been associated with malaria resistance in humans, whereas cytophilic immunoglobulin G (IgG antibodies are thought to play a critical role in immune protection against asexual blood stages of the parasite. Furthermore, HBB, IL4, TNF, and FCGR2A have been associated with both malaria resistance and IgG levels. This suggests that some malaria resistance genes influence the levels of IgG subclass antibodies. Methods In this study, the effect of HBB, IL4, IL12, TNF, LTA, NCR3 and FCGR2A polymorphisms on the levels of IgG responses against Plasmodium falciparum blood-stage extract was investigated in 220 individuals living in Burkina Faso. The Pearson’s correlation coefficient among IgG subclasses was determined. A family-based approach was used to assess the association of polymorphisms with anti-P. falciparum IgG, IgG1, IgG2, IgG3 and IgG4 levels. Results After applying a multiple test correction, several polymorphisms were associated with IgG subclass or IgG levels. There was an association of i haemoglobin C with IgG levels; ii the FcγRIIa H/R131 with IgG2 and IgG3 levels; iii TNF-863 with IgG3 levels; iv TNF-857 with IgG levels; and, v TNF1304 with IgG3, IgG4, and IgG levels. Conclusion Taken together, the results support the hypothesis that some polymorphisms affect malaria resistance through their effect on the acquired immune response, and pave the way towards further comprehension of genetic control of an individual’s humoral response against malaria.

  16. Label-free Raman mapping of surface distribution of protein a and IgG biomolecules.

    Science.gov (United States)

    Combs, Zachary A; Chang, Sehoon; Clark, Tolecia; Singamaneni, Srikanth; Anderson, Kyle D; Tsukruk, Vladimir V

    2011-03-15

    We have demonstrated a nanoengineered substrate composed of micropatterned silver nanoparticles to be used for the label-free mapping of adsorbed biomolecules. We utilized surface-enhanced Raman scattering (SERS) phenomenon to monitor the known bioanalytes, protein A and human immunoglobulin G (IgG). The SERS substrate was composed of a poly(alylamine hydrochloride) (PAH)/poly(styrenesulfonate) (PSS) layer-by-layer (LbL) nanocoating micropatterned with silver nanoparticles confined to microscopic stripes. Selective adsorption of biomacromolecules is facilitated by the amine-terminated LbL nanocoating, which prevents the surface adsorption of positively charged protein A across the surface except on the patterned regions containing negatively charged silver nanoparticles. Furthermore, adsorption of IgG on predetermined regions is facilitated by the selective binding of the Fc region of IgG to protein A. This label-free SERS approach provides accurate, selective, and fast detection of protein A and IgG solutions with a nanomolar concentration, down to below 1 nM for IgG in solution. This method could also be utilized for the facile detection of proteins in field conditions as well as in clinical, forensic, industrial, and environmental laboratories. PMID:21294559

  17. IgG4-Related Lung Disease Associated with Usual Interstitial Pneumonia.

    Science.gov (United States)

    Schneider, Frank; Veraldi, Kristen L; Levesque, Marc C; Colby, Thomas V; S Yi, Eunhee

    2016-01-01

    We report a case of immunoglobulin(Ig)G4-related disease with the radiologic and histopathological manifestations resembling usual interstitial pneumonia (UIP). The patient was a 62-year-old man who presented with progressive dyspnea of insidious onset. High resolution computed tomography of the chest showed lower-lobe predominant peripheral reticulation and traction bronchiectasis but no honeycomb change. Microscopic examination of the surgical lung biopsy showed characteristic features of UIP including architectural distortion by fibrosis with peripheral and paraseptal accentuation, scattered fibroblast foci and microscopic honeycomb change. In addition there were prominent multifocal lymphoplasmacytic infiltrates with a marked increase of IgG4-positive plasma cells (79 per high power field in hot spots) and high IgG4/IgG ratio (up to 67%). The serum IgG4 level was elevated at 760 mg/dl (reference range 9-89), with normal levels for the other IgG subclasses and negative serologic markers for autoimmune diseases. The patient's symptoms improved significantly with oral corticosteroid treatment. PMID:27053971

  18. Multifocal fibrosclerosis and IgG4-related disease involving the cardiovascular system

    International Nuclear Information System (INIS)

    The cardiovascular system may be involved as a target organ of multifocal fibrosclerosis, which may manifest as idiopathic retroperitoneal fibrosis, inflammatory aortic aneurysm, inflammatory periarteritis, and inflammatory pericarditis. These pathological conditions can sometimes occur concomitantly. Idiopathic retroperitoneal fibrosis and inflammatory abdominal aortic aneurysm are both characterized by the presence of fibro-inflammatory tissue around the abdominal aorta expanding into the surrounding retroperitoneal structures, and together they may be termed 'chronic periaortitis'. Cardiovascular fibrosclerosis has become non-uncommonly encountered condition since imaging modalities have made its diagnosis more feasible. In addition, recent studies have demonstrated that a certain fraction, but not all, of cardiovascular fibrosclerosis may have a link with immunoglobulin-G4 (IgG4)-related sclerosing disease (IgG4-SD). IgG4-SD is histologically characterized by dense fibrosclerosis and infiltration of lymphocytes and IgG4-positive plasma cells, and these histopathologic findings seem to be essentially similar regardless of the organs involved. In this mini review, we summarize what is known so far about multifocal fibrosclerosis of the cardiovascular system and its association with IgG4-SD, and what remains to be clarified in future investigations. (author)

  19. Regulation of in vitro PWM-induced IgG secretion in humans

    International Nuclear Information System (INIS)

    PWM-induced differentiation of human PBMC into immunoglobulin (Ig) secreting cells is a widely used model of in vivo IgG secretion. We examined the relationship between the amount of IgG secreted in PBMC cultures obtained from individuals who consistently secrete either very high (HR) or very low amounts (LR) of IgG and various in vitro immune function assays. The PBMC obtained from LR contained a higher ratio of cells expressing the T-suppressor/inducer to T-helper/inducer phenotype. The autologous mixed lymphocyte response was lower and the amount of in vivo radiation sensitive suppression was higher in the LR than in the HR. LR E- cells secreted less IgG than the HR E- cells when both were mixed with heterologous HR E+ cells. Monocyte depletion reduced IgG secretion in both LR and HR. These results suggest that each of the subsets Ts, Th (Thi, Tsi), and B lymphocytes are involved in the regulation of PWM-induced Ig secretion and that the functions of each of these subsets differ in HR and LR individuals

  20. Increased Levels of IgG Antibodies against Human HSP60 in Patients with Spondyloarthritis

    DEFF Research Database (Denmark)

    Nielsen, Astrid Hjelholt; Carlsen, Thomas; Deleuran, Bent;

    2013-01-01

    Introduction: Spondyloarthritis (SpA) comprises a heterogeneous group of inflammatory diseases, with strong association to human leukocyte antigen (HLA)-B27. SpA is suggested triggered by bacterial infection, and bacterial heat shock protein (HSP) seems to be a strong T cell antigen. Since...... severity in relation to HLA-B27 was evaluated. Material & Methods: Serum samples from 82 patients and 50 controls were analysed by enzyme-linked immunosorbent assay (ELISA) for immunoglobulin (Ig)G1, IgG2, IgG3 and IgG4 antibodies against human HSP60 and HSP60 from Chlamydia trachomatis, Salmonella...... against human HSP60, but not antibodies against bacterial HSP60, were elevated in the SpA group compared with the control group. Association between IgG3 antibodies against human HSP60 and BASMI was shown in HLA-B27+ patients. Only weak correlation between antibodies against bacterial and human HSP60 was...

  1. Effects of adjuvants on IgG subclasses elicited by virus-like Particles

    Directory of Open Access Journals (Sweden)

    Visciano Maria Luisa

    2012-01-01

    Full Text Available Abstract Background Virus-Like Particles (VLPs represent an efficient strategy to present and deliver conformational antigens to the immune system, inducing both arms of the adaptive immune response. Moreover, their particulate structure surrounded by cell membrane provides an adjuvanted effect to VLP-based immunizations. In the present study, the elicitation of different patterns of IgG subclasses by VLPs, administered in CpG ODN1826 or poly(I:C adjuvants, has been evaluated in an animal model. Results Adjuvanted VLPs elicited a higher titer of total specific IgG compared to VLPs alone. Furthermore, while VLPs alone induced a balanced TH2 pattern, VLPs formulated with either adjuvant elicited a TH1-biased IgG subclasses (IgG2a and IgG3, with poly(I:C more potent than CpG ODN1826. Conclusions The results confirmed that adjuvants efficiently improve antigen immunogenicity and represent a suitable strategy to skew the adaptive immune response toward the differentiation of the desired T helper subset, also using VLPs as antigen.

  2. Síntesis, caracterización y evaluación de la actividad de diez compuestos mesoiónicos contra microorganismos

    OpenAIRE

    Filgueiras de Athayde Filho, Petrônio; Miller, Joseph; Mayall-Simas, Alfredo; Xisto da Fonseca Ribeiro de Sena, Kêsia; Andrade Chiappeta, Alda

    1999-01-01

    Tres mesoiónicos 1,3,4-tiadiazolio-2-tiolato siete cloruros 1,3,4-triazolio-2-tiol se han sintetizado y se ha probado su actividad contra distintos microoganismos. Las estructuras químicas se determinaron por Análisis Elemental, IR, Masa y espectrometría de RMN 1H e 13C. Las pruebas biológicas indican que los compuestos tienen actividad sustancial contra bacterias Gram positivas y alcohol-ácido-resistentes, actividad moderada contra levaduras, escasa actividad contra otros hongos y son inacti...

  3. Violência contra os idosos: análise documental Violencia contra los ancianos: análisis documental Violence against the aged: documental analysis

    Directory of Open Access Journals (Sweden)

    Jacy Aurélia Vieira de Souza

    2007-06-01

    Full Text Available O objetivo do estudo foi analisar os dados de violência e maus-tratos contra os idosos por meio de documentos oficiais, em Fortaleza-CE. Estudo retrospectivo, documental realizada em uma instituição de referência do Ceará, oficializada em denúncias de violência contra idosos. A coleta de dados ocorreu no primeiro semestre de 2005. Dos 424 documentos analisados, 284(67% identificou-se como abandono dos idosos. Quanto ao agressor, 207(49% era filho da vítima. Dentre os casos de violências, 161 (38% foi negligência, seguido por apropriação indébita de aposentadoria, 114 (27%; agressão verbal, 79(19% e física 68(16%. Tais eventos foram registrados por meio de denúncias, principalmente, ao serviço Alô-Idoso, 306(77%. Pôde-se verificar a importância de serviços voltados para essa questão, porém torna-se fundamental que políticas públicas enfoquem o papel social do idoso e privilegiem o cuidado e a proteção dessa parcela populacional em suas famílias e instituições.Lo estudio tuvo como objetivo analizar los datos sobre violencia contra los ancianos en la contexto familiar. Se realizó un estudio documental retrospectivo en una institución de referencia de Ceará, con oficialización en reclamaciones de violencia contra los ancianos. Se coletaron los datos en enero a julio de 2005. Se compilaron 424 datos. Se constató que 284 (67%, caso de violencia ocurrieron a los ancianos de sexo femenino. Con relación a los agresores, 207 (49%, eran hijos de las víctimas. Entre los tipos de violencia, 161(38% son negligencia, 114 (27%, la apropiación indebida de lo jubilación; la agresión verbal, 79 (19%, y la agresión físico, 68 (16%. Se ha podido identificar la importancia de servicio a cerca de la cuestión, no obstante, se resulta fundamental que políticas públicas de ese porcentaje de la población proyecten la función social del anciano, a sí convalorar el cuidado y la protección de ese porcentaje poblacional en sus

  4. Evaluación y evidencia para la vacunación contra rotavirus y vacunación contra Streptococcus pneumonia en Costa Rica

    Directory of Open Access Journals (Sweden)

    Ricardo Morales Vargas

    2006-12-01

    Full Text Available Se evaluaron y compararon dos posibles intervenciones en salud pública para ser aplicadas en Costa Rica: a vacunación contra el rotavirus y b vacunación contra el Streptococcus pneumonia. Se utilizó la técnica de revisión de la literatura impresa y electrónica usando como marco de referencia para la evaluación las recomendaciones de la International Network of Agencies of Health Care Technology Assessment -(INHATA y las recomendaciones de la OPS/OMS sobre evaluación de tecnologías sanitarias para países en desarrollo. Se utilizaron los criterios de seguridad, eficacia, efectividad, utilidad y costo-beneficio de ambas intervenciones, así como su impacto organizacional, ético y social. Se escogieron como grupos en riesgo las personas menores de 5 años y los mayores de 65 años. Se emplearon datos económicos publicados por otros autores sobre costos sanitarios y los precios de mercado para las vacunas. Considerando los aspectos anteriores, así como la calidad y amplitud de la literatura sobre ambas intervenciones, se concluye que la intervención contra el rotavirus podría ser una intervención de mayor impacto en cuanto a número de casos evitables en Costa Rica, por lo que se recomienda realizar estudios nacionales de Fase III para evaluar su efectividad. Si bien la intervención contra el Streptococcus pneumonia (C/B =2,4 es una intervención más favorable económicamente que la del rotavirus (C/B =2,7 en términos de costo/beneficio en el mediano y largo plazo, esta conclusión se revertiría si sólo se consideran los costos anuales luego del primer año. Resultados de la evaluación global, utilizando los criterios anteriores, propuesta por el autor, favorece la intervención ante el rotavirus.Two posible health interventions were evaluated and compared for application in Costa Rica: a vaccination against Rotavirus, and b vaccination against Streptococcus pneumonia. Analysis of existing printed and electronic literature was

  5. IgG4-Related Disease Combined with Autoimmune Hemolytic Anemia and Steroid-Responsive Transient Hypercalcemia

    OpenAIRE

    Sho Hasegawa; Sohtaro Mine; Shotaro Hagiwara

    2015-01-01

    A 67-year-old man with elevated serum immunoglobulin G4 (IgG4) levels, systemic lymphadenopathy infiltrated by IgG4-positive plasma cells, and Coombs-positive autoimmune hemolytic anemia (AIHA) showed marked hypercalcemia. Although the intact parathyroid hormone (PTH) level was elevated, 99mTc-MIBI scintigraphy and thyroid ultrasonography revealed no evidence of primary hyperparathyroidism. Liver biopsy showed marked infiltration of IgG4-positive plasma cells, which confirmed the diagnosis of...

  6. Serum Concentrations of IgG4 in the Spanish Adult Population: Relationship with Age, Gender, and Atopy

    OpenAIRE

    Carballo, Iago; Alvela, Lucía; Pérez, Luis-Fernando; Gude, Francisco; Vidal, Carmen; Alonso, Manuela; Sopeña, Bernardo; Gonzalez-Quintela, Arturo

    2016-01-01

    Background and Aim Serum IgG4 concentrations are commonly measured in clinical practice. The aim of this study was to investigate serum IgG4 concentrations in adults and their potential relationship with demographic, lifestyle, metabolic, and allergy-related factors. Methods Serum IgG4 concentrations were measured with a commercial assay in 413 individuals (median age 55 years, 45% males) who were randomly selected from a general adult population. Results Median IgG4 concentration was 26.8 mg...

  7. The distribution of IgG subclass deposition on renal tissues from patients with anti-glomerular basement membrane disease

    OpenAIRE

    QU, ZHEN; Cui, Zhao; Liu, Gang; Zhao, Ming-Hui

    2013-01-01

    Background Renal injury of anti-glomerular basement membrane (GBM) disease is defined by the linear deposition of IgG along GBM and rapidly progressive glomerulonephritis. To date, the distribution of anti-GBM IgG subclasses on renal tissue is still unclear. In the current study, we investigated the deposition of the four IgG subclasses using immunohistochemistry in the renal biopsy specimens from 46 patients with anti-GBM disease. Results All four IgG subclasses can be detected within the GB...

  8. Etablierung und Evaluierung zweier IgG Subklassen-ELISA für die Borreliose-Diagnostik beim Menschen

    OpenAIRE

    Zebandt, Silke

    2001-01-01

    Es wurde in dieser Studie ein neues diagnostisches Verfahren in Form zweier borrelienspezifischer IgG1-und IgG3-Subklassen-ELISA (Antigen: Borrelienstamm Pko) und deren Auswertung etabliert, um durch mögliche Unterschiede in dem IgG1- und IgG3-Subklassenverhältnis in Bezug zur klinischen Symptomatik einen neuen diagnostischen Parameter zu finden. Dabei wurden untere Nachweisgrenzen für die beiden ELISA festgelegt, mit Hilfe derer eine Differenzierung der seronegativen und seropositiv...

  9. The many faces of Merlin: IgG4-associated pulmonary-renal disease.

    Science.gov (United States)

    Sprangers, Ben; Lioen, Pieter; Meijers, Björn; Lerut, Evelyne; Meersschaert, Joke; Blockmans, Daniel; Claes, Kathleen

    2011-09-01

    Pulmonary-renal syndrome is a common and serious disorder with a broad differential diagnosis. We describe a case of a middle-aged man presenting with interstitial pulmonary disease and severe renal impairment caused by a hypocomplementemic immune-complex-mediated interstitial nephritis. Serum levels of IgG4 were elevated, and renal biopsy specimens revealed the presence of interstitial IgG4(+) plasma cells. There was a rapid improvement of both pulmonary and renal abnormalities after the initiation of corticosteroids. To our knowledge, this report is the first to show interstitial pulmonary disease in association with interstitial kidney disease as the predominant and presenting symptoms of IgG4-related disease. PMID:21896524

  10. Homogeneous Detection of Human IgG by Gold Nanoparticle Probes

    Institute of Scientific and Technical Information of China (English)

    CAO Qihua; YUAN Hong; CAI Ruxiu

    2009-01-01

    A simple,and homogeneous detection system for human IgG based on the optical properties of aggregated gold nanoparticles probes were investigated.When gold nanoparticles with about 13 nm in diameter were modified by goat anti-human IgG,the addition of human IgG could change the absorption of colloidal gold solution,and the absorption intensity at 740 nm depended on the amount of human IgG.The aggregation of gold nanoparticles was also validated using transmission electron microscopy(TEM).A series of experiments were carried out to study the effects of pH value, the reaction temperature,and non-specific adsorption on the assay.A dynamic range of 10-500μg/~3 mL human IgG was observed.The new bioassay could be used for the rapid and ho-mogeneous detection of antibodies in bioanalytical chemistry.

  11. Autoimmune pancreatitis metachronously associated with retroperitoneal fibrosis with IgG4-positive plasma cell infiltration

    Institute of Scientific and Technical Information of China (English)

    Terumi Kamisawa; Pong Yui Chen; Yuyang Tu; Hitoshi Nakajima; Naoto Egawa

    2006-01-01

    Retroperitoneal fibrosis is an uncommon disorder characterized by the formation of a dense plaque of fibrous tissue in the retroperitoneum, and its etiology remains unknown. Autoimmune pancreatitis is a rare type of chronic pancreatitis characterized by fibrosis with abundant infiltration of IgG4-positive plasma cells and lymphocytes and obliterative phlebitis in the pancreas. We present a case of autoimmune pancreatitis that developed 10 mo after the occurrence of retroperitoneal fibrosis. Histological findings of the resected retroperitoneal mass were marked periureteral fibrosis with abundant infiltration of IgG4-positive plasma cells and lymphocytes and obliterative phlebitis.These findings suggest a common pathophysiological mechanism for retroperitoneal fibrosis and autoimmune pancreatitis in this case. Some cases of retroperitoneal fibrosis might be a retroperitoneal lesion of IgG4-related sclerosing disease.

  12. Voltage-driven translocation behaviors of IgG molecule through nanopore arrays

    Science.gov (United States)

    Liu, Lei; Wang, Bing; Sha, Jingjie; Yang, Yue; Hou, Yaozong; Ni, Zhonghua; Chen, Yunfei

    2013-05-01

    Nanopore-based biosensing has attracted more and more interests in the past years, which is also regarded as an emerging field with major impact on bio-analysis and fundamental understanding of nanoscale interactions down to single-molecule level. In this work, the voltage-driven translocation properties of goat antibody to human immunoglobulin G (IgG) are investigated using nanopore arrays in polycarbonate membranes. Obviously, the background ionic currents are modulated by IgG molecules for their physical place-holding effect. However, the detected ionic currents do `not' continuously decrease as conceived; the currents first decrease, then increase, and finally stabilize with increasing IgG concentration. To understand this phenomenon, a simplified model is suggested, and the calculated results contribute to the understanding of the abnormal phenomenon in the actual ionic current changing tendency.

  13. Comparison of Salivary Anti Helicobacter pylori IgG with Serum IgG and Bacteriological Tests in Detecting Helicobacter pylori Infections

    OpenAIRE

    H Ghasemian safaei; Fazeli, A.; H Tamizifar; Rashidi, N.(Department of Physics, Faculty of Basic Sciences, University of Mazandaran, P.O. Box 47416-1467, Babolsar, Iran)

    2005-01-01

    Background: This study was conducted to compare the efficacy of enzyme-linked immunosorbent assay (ELISA) for detecting anti-Helicobacter pylori (H. pylori) specific IgG antibodies in specimens of oral fluid and serum with bacteriological tests. Methods: Antral biopsy specimens, as well as serum and oral fluid samples were collected from 97 patients who underwent upper gastrointestinal endoscopy. The presence or absence of current H. pylori infection was determined by culture, ...

  14. High Serum IgG4 Concentrations in Patients with Hashimoto's Thyroiditis.

    Science.gov (United States)

    Popławska-Kita, Anna; Kościuszko-Zdrodowska, Maria; Siewko, Katarzyna; Telejko, Beata; Hryniewicka, Justyna; Milewski, Robert; Abdelrazek, Saeid Soleman; Szelachowska, Małgorzata; Górska, Maria

    2015-01-01

    Purpose. Since recent reports suggest that Hashimoto thyroiditis (HT) may be associated with IgG4-related disease, we aimed to find out whether the measurement of serum IgG4 allows for the identification of distinct types of HT, with different clinical, sonographic, and serologic characteristics. Methods. The group studied consisted of 53 patients with HT and 28 healthy individuals who underwent thyroid ultrasonography and body composition analysis. Serum concentrations of IgG4, TSH, anti-peroxidase antibodies (TPOAb), anti-TSH receptor antibodies, TNF-α, TGF-β1, Fas Ligand, TRAIL, and chemokines (CXCL9, CXCL11, and CXCL10) were measured by ELISA or radioimmunoassay. Results. The group with IgG4 level >135 IU/ml accounted for 32.5% of the patients. The signs of fibrosis were present in 27.0% of the high-IgG4 patients and in 9.1% of the normal-IgG4 group. The patients with elevated IgG4 required higher doses of L-thyroxine and had significantly lower level of TPOAb (P=0.02) than the non-IgG4-HT individuals and higher TNF-α level in comparison with the controls (P=0.01). Conclusions. Our results suggest that the measurement of serum IgG4 allows for an identification of patients with more rapid progression of HT, requiring higher doses of L-thyroxine. Low TPOAb level and the absence of coexisting autoimmune diseases may suggest distinct pathomechanism of this type of thyroiditis. PMID:25784936

  15. Production of double antibody for radioimmunoassay (sheep anti-rabbit IgG antiserum)

    International Nuclear Information System (INIS)

    A second antibody (sheep anti-rabbit IgG antiserum) to be used in RIAs in which the first antibody is raised in rabbits was produced. For this production, initially the IgG was isolated from rabbit serum and purified by sodium sulphate precipitation followed by ion exchange chromatography on DEAE-cellulose. Four sheep were immunized with 500 u g of purified rabbit IgG, emulsified in Freund Complete Adjuvant and administered by multisite subcutaneous injections. These injections were repeated at 20-days intervals and blood samples (40 ml) were taken from the jugular vein 10 days after the boosts for the evaluation of the antisera title. After each four boosts a great bleeding was done by the same route. Approximately 500 ml of serum were obtained in each bleeding per animal. The antisera were evaluated by the human thyrotropin RIA developed at IPEN laboratories employing reagents provided by NIDDKD, USA. These evaluations referred to the determination of the antisera title and of the ideal concentration of carrier IgG, to the study of the kinetic of precipitation and to the confirmation of the inexistent cross-reactivity with human IgG, in comparison with a reference antiserum of know precipitation characteristics supplied by the Radioassay System Laboratories. Approximately 3,6 l of antiserum (sheep anti-rabbit IgG serum) were produced from the four sheep, which presented title and precipitation characteristics very similar to those exhibited by the imported commercial product, even presenting higher titles. The results obtained in this work indicated that it was created enough experience for the production of this biological reagent for RIA, that could be done integrally in the country in greater scale, and at a very reduced cost. (author). 81 refs, 36 figs, 33 tabs

  16. Profiling IgG N-glycans as potential biomarker of chronological and biological ages

    Science.gov (United States)

    Yu, Xinwei; Wang, Youxin; Kristic, Jasminka; Dong, Jing; Chu, Xi; Ge, Siqi; Wang, Hao; Fang, Honghong; Gao, Qing; Liu, Di; Zhao, Zhongyao; Peng, Hongli; Pucic Bakovic, Maja; Wu, Lijuan; Song, Manshu; Rudan, Igor; Campbell, Harry; Lauc, Gordan; Wang, Wei

    2016-01-01

    Abstract As an important post-translation modifying process, glycosylation significantly affects the structure and function of immunoglobulin G (IgG) molecules and is essential in many steps of the inflammatory cascade. Studies have demonstrated the potential of using glycosylation features of IgG as a component of predictive biomarkers for chronological age in several European populations, whereas no study has been reported in Chinese. Herein, we report various patterns of changes in IgG glycosylation associated with age by analyzing IgG glycosylation in 701 community-based Han Chinese (244 males, 457 females; 23–68 years old). Eleven IgG glycans, including FA2B, A2G1, FA2[6]G1, FA2[3]G1, FA2[6]BG1, FA2[3]BG1, A2G2, A2BG2, FA2G2, FA2G2S1, and FA2G2S2, change considerably with age and specific combinations of these glycan features can explain 23.3% to 45.4% of the variance in chronological age in this population. This indicates that these combinations of glycan features provide more predictive information than other single markers of biological age such as telomere length. In addition, the clinical traits such as fasting plasma glucose and aspartate aminotransferase associated with biological age are strongly correlated with the combined glycan features. We conclude that IgG glycosylation appears to correlate with both chronological and biological ages, and thus its possible role in the aging process merits further study. PMID:27428197

  17. Extraction of monoclonal antibodies (IgG1) using anionic and anionic/nonionic reverse micelles.

    Science.gov (United States)

    George, Daliya A; Stuckey, David C

    2010-01-01

    Purification schemes for antibody production based on affinity chromatography are trying to keep pace with increases in cell culture expression levels and many current research initiatives are focused on finding alternatives to chromatography for the purification of Monoclonal antibodies (MAbs). In this article, we have investigated an alternative separation technique based on liquid-liquid extraction called the reverse micellar extraction. We extracted MAb (IgG1) using reverse micelles of an anionic surfactant, sodium bis 2-ethyl-hexyl sulfosuccinate (AOT) and a combination of anionic (AOT) and nonionic surfactants (Brij-30, Tween-85, Span-85) using isooctane as the solvent system. The extraction efficiency of IgG1 was studied by varying parameters, such as pH of the aqueous phase, cation concentration, and type and surfactant concentration. Using the AOT/Isooctane reverse micellar system, we could achieve good overall extraction of IgG1 (between 80 and 90%), but only 30% of the bioactivity of IgG1 could be recovered at the end of the extraction by using its binding to affinity chromatography columns as a surrogate measure of activity. As anionic surfactants were suspected as being one of the reasons for the reduced activity, we decided to combine a nonionic surfactant with an anionic surfactant and then study its effect on the extraction efficiency and bioactivity. The best results were obtained using an AOT/Brij-30/Isooctane reverse micellar system, which gave an overall extraction above 90 and 59% overall activity recovery. An AOT/Tween-85/Isooctane reverse micellar system gave an overall extraction of between 75 and 80% and overall activity recovery of around 40-45%. The results showed that the activity recovery of IgG1 can be significantly enhanced using different surfactant combination systems, and if the recovery of IgG1 can be further enhanced, the technique shows considerable promise for the downstream purification of MAbs. PMID:20665658

  18. Overlapping IgG4 Responses to Self- and Environmental Antigens in Endemic Pemphigus Foliaceus.

    Science.gov (United States)

    Qian, Ye; Jeong, Joseph S; Ye, Jian; Dang, Bim; Abdeladhim, Maha; Aoki, Valeria; Hans-Filhio, Gunter; Rivitti, Evandro A; Valenzuela, Jesus G; Diaz, Luis A

    2016-03-01

    The etiology of human autoimmune diseases in general remains largely unknown, although the genetic and environmental interplay may be relevant. This applies to the autoimmune diseases of the skin such as the pemphigus phenotypes and others. In this group, there is an endemic form of pemphigus foliaceus (also known as fogo selvagem [FS]) in which the pathogenic IgG4 autoantibody response to the self-antigen desmoglein 1 (Dsg1) cross-reacts with the LJM11 sand fly salivary gland Ag. In this investigation, we dissected the IgG4 autoantibody repertoires used by FS patients in response to endogenous self-Dsg1 and exogenous LJM11 sand fly Ag. Based on analyses of the genetic clonal signatures of these Abs, our results indicate that there is a significant overlap between these two responses, as all identified IgG4 mAbs cross-react to both Dsg1 and LJM11 Ags. Germline H- and L-chain V gene Abs generated according to mutated cross-reactive mAbs preserved their reactivity to both Ags. Our findings suggest that both Dsg1 autoantigen and LJM11 environmental Ag could be the initial antigenic stimulants for the IgG4 autoimmune responses in FS. These results support our hypothesis that LJM11 Ag plays a substantial role in triggering the IgG4 autoantibody development in FS and provide new insights on how noninfectious environmental Ag(s) may drive the generation of autoantibodies in IgG4-related autoimmune diseases. PMID:26826247

  19. IgG1 and IgG4 antibody responses to the Anopheles gambiae salivary protein gSG6 in the sympatric ethnic groups Mossi and Fulani in a malaria hyperhendemic area of Burkina Faso.

    Directory of Open Access Journals (Sweden)

    Cinzia Rizzo

    Full Text Available Human antibody response to the Anopheles gambiae salivary protein gSG6 has recently emerged as a potentially useful tool for malaria epidemiological studies and for the evaluation of vector control interventions. However, the current understanding of the host immune response to mosquito salivary proteins and of the possible crosstalk with early response to Plasmodium parasites is still very limited. We report here the analysis of IgG1 and IgG4 subclasses among anti-gSG6 IgG responders belonging to Mossi and Fulani from Burkina Faso, two ethnic groups which are known for their differential humoral response to parasite antigens and for their different susceptibility to malaria. The IgG1 antibody response against the gSG6 protein was comparable in the two groups. On the contrary, IgG4 titers were significantly higher in the Fulani where, in addition, anti-gSG6 IgG4 antibodies appeared in younger children and the ratio IgG4/IgG1 stayed relatively stable throughout adulthood. Both gSG6-specific IgG1 and IgG4 antibodies showed a tendency to decrease with age whereas, as expected, the IgG response to the Plasmodium circumsporozoite protein (CSP exhibited an opposite trend in the same individuals. These observations are in line with the idea that the An. gambiae gSG6 salivary protein induces immune tolerance, especially after intense and prolonged exposure as is the case for the area under study, suggesting that gSG6 may trigger in exposed individuals a Th2-oriented immune response.

  20. Radiation dose to contra lateral breast during treatment of breast malignancy by radiotherapy

    Directory of Open Access Journals (Sweden)

    Chougule Arun

    2007-01-01

    Full Text Available Aims: External beam radiotherapy is being used regularly to treat the breast malignancy postoperatively. The contribution of collimator leakage and scatter radiation dose to contralateral breast is of concern because of high radio sensitivity of breast tissue for carcinogenesis. This becomes more important when the treated cancer breast patient is younger than 45 years and therefore the contralateral breast must be treated as organ at risk. Quantification of contralateral dose during primary breast irradiation is helpful to estimate the risk of radiation induced secondary breast malignancy. Materials and Methods: In present study contralateral breast dose was measured in 30 cancer breast patients undergoing external beam therapy by Co-60 teletherapy machine. Postoperative radiotherapy was delivered by medial and lateral tangential fields on alternate days in addition to supraclavicle field daily with 200 cGy/F to a total dose of 5000 cGy in 25 fractions. CaSO4: Dy themoluminescence dosimeter discs were employed for these measurements. Three TLD discs were put on the surface of skin of contra lateral breast, one at the level of nipple and two at 3 cms away from nipple on both side along the midline for each field. At the end treatment of each filed, TLD discs were removed and measured for dose after 24h on Thelmador - 6000 TLD reader. Results: The dose at the contra lateral breast nipple was to be 152.5 to 254.75 cGy for total primary breast dose of 5000 cGy in 25 equal fractions which amounted to 3.05-6.05% of total dose to diseased breast. Further it was observed that the maximum contribution of contralateral breast dose was due to medical tangential half blocked field. Conclusion: CaSO4; Dy thermoluminescence dosimetry is quite easy, accurate and convenient method to measure the contra lateral breast dose.

  1. O que o reumatologista deve saber sobre a vacina contra febre amarela

    Directory of Open Access Journals (Sweden)

    Ana Cristina Vanderley Oliveira

    2013-04-01

    Full Text Available Os pacientes portadores de doenças reumáticas são mais suscetíveis à infecção, quer seja pela própria doença de base ou pelo tratamento empregado. É papel do reumatologista prevenir as infecções nesse grupo de pacientes e, dentre as estratégias empregadas, encontra-se a vacinação. No grupo das doenças infecciosas que podem ser prevenidas está a febre amarela. Sua vacina é segura e eficaz na população em geral, mas, assim como as vacinas contendo organismos vivos atenuados, deve ser evitada sempre que possível em portadores de doenças reumáticas em uso de medicamentos imunossupressores. Sendo a febre amarela endêmica em grande parte do Brasil, e estando a vacinação contra essa doença indicada para a população residente em extensa parte do território nacional (além dos viajantes para essas regiões, torna-se essencial que o reumatologista tenha conhecimento da doença, das indicações e contraindicações da vacina contra a febre amarela. Nosso artigo tem o objetivo de destacar os principais aspectos que o reumatologista precisa conhecer sobre a vacina contra a febre amarela, para decidir por sua indicação ou contraindicação após avaliação do risco-benefício em situações específicas.

  2. An Overlapping Case of Lupus Nephritis and IgG4-Related Kidney Disease

    OpenAIRE

    Zaarour, Mazen; Weerasinghe, Chanudi; Eter, Ahmad; El-Sayegh, Suzanne; El-Charabaty, Elie

    2015-01-01

    We report a case of a 71-year-old Filipino female who was admitted to the hospital for abdominal pain, vomiting and diarrhea of 8 days duration. The patient was found to have marked acute kidney injury (AKI), which required hemodialysis in the next 3 days. Extensive workup revealed hematuria, subnephrotic range proteinuria, elevated anti-nuclear antibody (ANA) and elevated total immunoglobulin G (IgG) levels, with normal IgG4 and anti-dsDNA levels. On kidney biopsy, mild membranous glomerulon...

  3. Elevated Serum IgG4 Defines Specific Clinical Phenotype of Rheumatoid Arthritis

    OpenAIRE

    2014-01-01

    Objectives. To explore the correlation of serum IgG4 (sIgG4) with clinical manifestations or therapeutic response in rheumatoid arthritis (RA). Methods. Consecutive 136 RA patients were recruited and followed up at regular interval. SIgG4 was detected by immunonephelometry. Serial synovial tissue sections from 46 RA patients were stained immunohistochemically for IgG4. Results. Forty-six percent of 136 RA patients had elevated sIgG4. Patients with elevated sIgG4 had higher sIgG4/sIgG ratio, C...

  4. Significantly lower anti-Leishmania IgG responses in Sudanese versus Indian visceral leishmaniasis.

    Directory of Open Access Journals (Sweden)

    Tapan Bhattacharyya

    2014-02-01

    Full Text Available BACKGROUND: Visceral leishmaniasis (VL, a widely distributed systemic disease caused by infection with the Leishmania donovani complex (L. donovani and L. infantum, is almost always fatal if symptomatic and untreated. A rapid point-of-care diagnostic test for anti-Leishmania antibodies, the rK39-immunochromatographic test (rK39-ICT, has high sensitivity and specificity in South Asia but is less sensitive in East Africa. One of the underlying reasons may be continent-specific molecular diversity in the rK39 antigen within the L. donovani complex. However, a second reason may be differences in specific IgG anti-Leishmania levels in patients from different geographical regions, either due to variable antigenicity or immunological response. METHODOLOGY/PRINCIPAL FINDINGS: We determined IgG titres of Indian and Sudanese VL patients against whole cell lysates of Indian and Sudanese L. donovani strains. Indian VL patients had significantly higher IgG titres against both L. donovani strains compared to Sudanese VL patients (p<0.0001. Mean reciprocal log10 50% end-point titres (1/log10t50 were i 3.80 and 3.88 for Indian plasma and ii 2.13 and 2.09 for Sudanese plasma against Indian and Sudanese antigen respectively (p<0.0001. Overall, the Indian VL patients therefore showed a 46.8-61.7 -fold higher mean ELISA titre than the Sudanese VL patients. The higher IgG titres occurred in children (<16 years old and adults of either sex from India (mean 1/log10t50: 3.60-4.15 versus Sudan (mean 1/log10t50: 1.88-2.54. The greatest difference in IgG responses was between male Indian and Sudanese VL patients of ≥ 16 years old (mean 1/log10t50: 4.15 versus 1.99 = 144-fold (p<0.0001. CONCLUSIONS/SIGNIFICANCE: Anti-Leishmania IgG responses among VL patients in Sudan were significantly lower than in India; this may be due to chronic malnutrition with Zn(2+ deficiency, or variable antigenicity and capacity to generate IgG responses to Leishmania antigens. Such

  5. ADAMTS13-binding IgG are present in patients with thrombotic thrombocytopenic purpura

    OpenAIRE

    Tsai, Han-Mou; Raoufi, Mojgan; Zhou, Wenhua; Guinto, Enriqueta; Grafos, Nickolas; Ranzurmal, Safi; Greenfield, Robert S.; Rand, Jacob H.

    2006-01-01

    Functional assays are commonly used to measure the antibodies of ADAMTS13 found in patients of thrombotic thrombocytopenic purpura (TTP). In this study we used an enzyme-linked immunoassay to analyze the ADAMTS13-binding IgG levels in six groups of individuals: normal, random hospitalized patients, acute TTP,TTP after receiving plasma therapy, TTP in remission, and other types of thrombotic microangiopathy (TMA). The results showed thatADAMTS13-binding IgG levels were elevated in 100% of the ...

  6. Turnover rate of anti-D IgG injected during pregnancy.

    OpenAIRE

    Eklund, J; M. Hermann; Kjellman, H; Pohja, P

    1982-01-01

    Anti-D IgG was injected into 15 Rh-negative women in the 28th week of gestation and into three non-pregnant women. The uptake of anti-D after the intramuscular injections was calculated by measuring the concentration of antibody in the plasma with an autoanalyser. The biological half life and the catabolic rate of anti-D IgG were calculated according to a compartmental model. The recovery in vivo of anti-D was an average 24% in the non-pregnant women and 21% in the pregnant women. The half li...

  7. Fluorescent Molecular Rotors as Dyes to Characterize Polysorbate-Containing IgG Formulations

    OpenAIRE

    Hawe, Andrea; Filipe, Vasco; Jiskoot, Wim

    2009-01-01

    Purpose The aim was to evaluate fluorescent molecular rotors (DCVJ and CCVJ), which are mainly sensitive to viscosity, for the characterization of polysorbate-containing IgG formulations and compare them to the polarity-sensitive dyes ANS, Bis-ANS and Nile Red. Methods IgG formulations with polysorbate 20 or 80 were stressed below the aggregation temperature and analyzed by steady-state and time-resolved fluorescence and by HP-SEC with UV and fluorescent dye detection (Bis-ANS and CCVJ). Furt...

  8. IgG antibodies to Aspergillus fumigatus in cystic fibrosis: a laboratory correlate of disease activity.

    OpenAIRE

    Forsyth, K D; Hohmann, A W; Martin, A J.; Bradley, J

    1988-01-01

    Serum was collected from 50 patients with cystic fibrosis, and IgG antibodies to Aspergillus fumigatus were measured by enzyme linked immunosorbent assay (ELISA). In addition, total IgE and Aspergillus specific IgE antibodies were measured in 41 of the 50. A close association was found between pulmonary function and clinical state, and IgG antibodies to Aspergillus. There was no association between pulmonary function or clinical state and IgE antibodies. It is postulated that in patients with...

  9. Micro-ELISA for the quantitation of human urinary IgG

    DEFF Research Database (Denmark)

    Fomsgaard, A; Feldt-Rasmussen, B; Deckert, M; Dinesen, B

    1987-01-01

    assay range was 5-200 micrograms/l. The relative standard deviations within and between assays were 5 and 9%, respectively. Recovery of IgG added to urine was 100-102% (n = 12), and dilution of urine was linear. The assay range allowed for the quantitation of IgG in human urine samples, covering the......When investigating glomerular changes in the early stages of diabetic renal disease, it is important to be able to estimate low concentrations of urinary immunoglobulins, as well as the albumin/immunoglobulin ratio. For this reason there is a need for highly sensitive and specific routine assays...

  10. IgG is transported across the mouse yolk sac independently of FcγRIIb

    OpenAIRE

    Mohanty, Sudhasri; Kim, Jonghan; Latha P Ganesan; Phillips, Gary S.; Hua, Keding; Jarjoura, David; Hayton, William L.; Robinson, John M.; Anderson, Clark L.

    2009-01-01

    It is generally accepted that FcRn is the major IgG transporter in human syncytiotrophoblast and the mouse yolk sac endoderm, however the finding of a different Fc receptor FcγRIIb (RIIb) in the human placental endothelium has suggested the existence of an additional IgG transporter. To test this hypothesis in the mouse, we utilized wild-type (RIIb+/+) mice and mice with a null mutation in the gene encoding RIIb (RIIb−/− mice). We found that while RIIb is expressed in the placental yolk sac v...

  11. La vacunación contra pertussis: Estado actual y perspectivas futuras

    Directory of Open Access Journals (Sweden)

    Celso Pérez-Bolaños

    2012-01-01

    Full Text Available La tosferina o pertussis es una enfermedad producida por la bacteria Gram negativa Bordetella pertussis y constituye actualmente un problema de salud a escala mundial, siendo la población infantil la más vulnerable dentro de los grupos de riesgo. Suele ser fatal en niños menores de un año, debido a que la tos paroxística característica bloquea las vías respiratorias, lo cual provoca la asfixia y la muerte. Adicionalmente, se observan eventos adversos o complicaciones serias de la enfermedad tales como neumonías bacterianas secundarias, epilepsias, encefalopatía, apnea e hipertensión pulmonar. En la actualidad se aplican programas extensivos de vacunación contra pertussis en todo el mundo, de modo que la enfermedad está considerada como relativamente bien controlada. Según informes de la Organización Mundial de la Salud, cerca del 82 % de toda la población infantil mundial recibió las tres dosis de la vacuna de pertussis en 2008. La vacunación global contra pertussis en ese año evitó cerca de 687 000 muertes por la enfermedad. Sin embargo, se ha observado que ocurre un resurgimiento de ella a escala mundial, así como una prevalencia en zonas del mundo donde la vacunación es pobre. El presente trabajo tuvo como objetivo presentar una revisión acerca de los problemas inherentes a la vacunación contra esta enfermedad en el contexto actual de su resurgimiento a escala universal, la forma de enfocarlos y resolverlos, para su aplicación en Cuba en caso necesario. La vacunación contra pertussis necesita de nuevos enfoques dirigidos a la eliminación de un flagelo que afecta primordialmente a la población infantil, que es el futuro de la humanidad. La solución del problema parece ser la búsqueda de nuevas vacunas más eficaces y la extensión de los esquemas de vacunación a la población de adolescentes y adultos que rodean a los infantes, así como a las mujeres en estado de gestación y a los recién nacidos.

  12. Habilidades comunicativas dentro de la familia: una medida imprescincible contra el acoso escolar en La Rioja

    OpenAIRE

    Lopez-Hernaez, L. (Lara); Ovejero-Bruna, M.M. (María Mercedes)

    2015-01-01

    En función del análisis de diferentes estudios que resaltan el importante papel del afecto y el diálogo intrafamiliar contra el mal comportamiento de los hijos en sociedad, nos planteamos qué opina la comunidad educativa respecto a esto y qué medidas proponen para erradicar el acoso escolar. Para obtener esta información, se ha llevado a cabo un estudio en la comunidad de La Rioja, a través de un cuestionario dirigido a 348 alumnos de ESO; entrevistas a treinta profesores, dos grupos de discu...

  13. Discriminação contra os estudantes obesos e os muito magros nas escolas Brasileiras

    OpenAIRE

    Kubota, Luis Claudio

    2014-01-01

    A Pesquisa Nacional de Saúde do Escolar (PeNSE) 2012, realizada pelo Instituto Brasileiro de Geografia e Estatística (IBGE), em parceria com o Ministério da Saúde (MS), abrange um amplo leque de assuntos, com destaque para comportamentos de risco. Este artigo tem o objetivo de analisar a discriminação contra estudantes obesos e muito magros, utilizando microdados da PeNSE. Os dados indicam que alunos que se autoclassificam “muito gordos” ou “muito magros” são muito mais propensos a comportame...

  14. Vectores recombinantes basados en el virus Vaccinia modificado de Ankara (MVA) como vacunas contra la leishmaniasis

    OpenAIRE

    Pérez Jiménez, Eva; Larraga, Vicente; Esteban, Mariano

    2005-01-01

    Vectores recombinantes basados en el virus vaccinia modificado de Ankara (MVA) como vacunas contra la leishmaniasis. Los vectores de la invención contienen secuencias codificantes de la proteína LACK, preferentemente insertadas en el locus de hemaglutinina del virus y bajo el control de un promotor que permite su expresión a lo largo del ciclo de infección del virus. Son vectores seguros, estables, que dan lugar a una potente respuesta inmune que confiere protección frente a la leishmaniasis,...

  15. Rivalidades en las redes de poder de Manila: el golpe contra el gobernador Diego de Salcedo

    OpenAIRE

    Antoni Picazo Muntaner

    2013-01-01

    En la segunda mitad del siglo XVII Filipinas vivió un inusitado golpe de mano contra su gobernador y capitán general Diego de Salcedo, el cual fue detenido por la Inquisición de las islas y procesado. Proceso que fue el final de una confrontación como nunca se había vivido entre diferentes redes de poder y que acabó con la intervención de la Corte y la condena unánime de todos los participantes en aquellos acontecimientos. 

  16. La guerra contra el narcotráfico: ¿una guerra perdida?

    OpenAIRE

    Jorge Enrique Pérez Lara

    2011-01-01

    El presente trabajo trata sobre los problemas derivados del narcotráfico en México, por lo que se realiza un estudio de los resultados que ha tenido la guerra frontal emprendida por el presidente Calderón con base en datos proporcionados por instancias oficiales, como la Procuraduría General de la República, y organizaciones civiles, como México Unido Contra la Delincuencia, y en datos internacionales proporcionados por el Índice de Incidencia Delictiva. Todo ello con el propósito de analizar...

  17. A Conferência de Durban contra o Racismo e a responsabilidade de todos

    OpenAIRE

    J. A. Lindgren Alves

    2002-01-01

    O presente trabalho teve por objetivo estudar a Conferência de Durban contra o Racismo ocorrida em 2001. Buscou-se analisar o contexto em que a Conferência ocorreu, as dificuldades encontradas como a não participação do governo de Washington e Tel-Aviv, os avanços alcançados e, ao final, o importante papel exercido pelo Brasil.The present article had the aim of studying the Durban Conference against Racism that took place in 2001. The context in which the Conference ocurred, the dificulties t...

  18. Terapia génica con citocinas contra cáncer cervicouterino

    OpenAIRE

    Víctor Hugo Bermúdez-Morales; Oscar Peralta-Zaragoza; Vicente Madrid-Marina

    2005-01-01

    La terapia génica es una excelente alternativa para el tratamiento de muchas enfermedades. La capacidad para manipular el DNA ha permitido dirigir la terapia génica para corregir la función de un gen alterado, aumentar la expresión de un gen o activar la respuesta inmune. Así, se puede proponer el uso del DNA como un medicamento capaz de controlar, corregir o curar una enfermedad. La terapia génica contra cáncer tiene un potencial enorme, y en la última década se han obtenido resultados muy a...

  19. Maternidad y militancia ambiental en carne propia : Las mujeres de bouwer contra el vertedero de residuos

    OpenAIRE

    Azzinnari, Nayla Inés

    2012-01-01

    La particular concentración de actividades contaminantes radicadas en Bouwer (provincia de Córdoba) alarmó a sus habitantes, que en el año 2008 se alzaron contra la que consideraban la principal amenaza: el vertedero de residuos de la ciudad capital. Este artículo repone el primer año de protesta social haciendo foco en la mayoritaria presencia de mujeres para interrogarse por las motivaciones que las condujeron a integrar la organización vecinal y por el lugar de la maternidad como fundament...

  20. Rivalidades en las redes de poder de Manila: el golpe contra el gobernador Diego de Salcedo

    Directory of Open Access Journals (Sweden)

    Antoni Picazo Muntaner

    2013-05-01

    Full Text Available En la segunda mitad del siglo XVII Filipinas vivió un inusitado golpe de mano contra su gobernador y capitán general Diego de Salcedo, el cual fue detenido por la Inquisición de las islas y procesado. Proceso que fue el final de una confrontación como nunca se había vivido entre diferentes redes de poder y que acabó con la intervención de la Corte y la condena unánime de todos los participantes en aquellos acontecimientos. 

  1. Violencia doméstica y contra las mujeres en las novelas de Charles Dickens

    OpenAIRE

    Andino Lucas, Eugenia

    2016-01-01

    La presente tesis es un estudio panorámico del modo en el que las novelas de Charles Dickens tratan la violencia de género, entendida como violencia contra la mujer por su pareja o ex-pareja, y la violencia sexual. También se tratan los casos menos frecuentes en los que las agresoras son personajes femeninos, para dar una visión de conjunto de la violencia en la pareja en la obra del autor. Se parte de un análisis de los roles sociales victorianos del hombre y la mujer que tenían un marcado c...

  2. Aerodynamic performance of contra-rotating Wells turbine for wave energy conversion

    Energy Technology Data Exchange (ETDEWEB)

    Raghunathan, S.; Beattie, W.C. [Queen`s Univ., Belfast (United Kingdom)

    1995-12-31

    The wave energy devices currently being built in United Kingdom and elsewhere have adopted the Wells air turbine for converting pneumatic energy in the device to mechanical energy of rotation. A monoplane (single plane) Wells turbine can absorb only a certain maximum pneumatic pressure amplitude due to tip speed limitations. For wave energy devices which produce large pneumatic pressure amplitudes a biplane Wells turbine with or without guide vanes can be used. An alternative to a biplane is a contra-rotating rotor. The aerodynamic performance and control of such a rotor are discussed.

  3. Publicidad Contra la Violencia: Un Estudio de Recepción

    OpenAIRE

    Sara Elena Giraldo Villegas; Aixa Lucia Miranda Avendaño

    2014-01-01

    Recientemente se ha estado emitiendo en la televisión nacional de Colombia spots publicitarios generalmente conocidos como mensajes institucionales cuyos contenidos van en contra de las distintas formas de violencia, lo cual marca el inicio de campañas que incentivan la tolerancia y la convivencia pacífica. No obstante, es necesario conocer el resultado de esos mensajes, si han logrado su propósito, y si existe indiferencia ante la violencia real de los telespectadores. La emisión de estos sp...

  4. RESISTÊNCIA DE DUAS ESPÉCIES DE BAMBU TRATADAS CONTRA FUNGOS XILÓFAGOS

    OpenAIRE

    Rogy Frigeri Tiburtino; Juarez Benigno Paes; Graziela Baptista Vidaurre; Antonio Ludovico Beraldo; Marina Donária Chaves Arantes

    2015-01-01

    RESUMOO objetivo deste trabalho foi avaliar a resistência de bambus das espécies Bambusa vulgaris e Dendrocalamus giganteus após serem expostos a três métodos de tratamentos químicos preservativos, contra a ação dos fungos Postia placenta e Polyporus fumosus. Os métodos de tratamento empregados foram o de transpiração (diafragma íntegro e rompido), imersão prolongada e Boucherie modificado. As hastes de bambu foram transformadas em colmos de 2,0 m de comprimento e tratadas em solução de 1 ou ...

  5. A Dinâmica interpessoal do 1 contra 1 no futebol

    OpenAIRE

    Santos, Diogo Cardoso

    2011-01-01

    O objectivo deste estudo foi estudar como varia a distância interpessoal e a velocidade relativa consoante haja sucesso do atacante ou do defesa, e em função da trajectória da jogada, em situações de 1 contra 1 na zona ofensiva do terreno de jogo. Foram filmados 6 jogos de equipas profissionais portuguesas relativos a época desportiva 2010-2011. A amostra foi constituída por 64 situações (42 situações de sucesso do atacante e 22 situações de sucesso do defesa) que foram agrupadas de acordo co...

  6. Protección contra incendios de un almacén de material hospitalario

    OpenAIRE

    Marín de la Escalera Esquivel, Manuel

    2011-01-01

    Mediante este proyecto se pretende garantizar que el Almacén Central del Hospital Universitario de Canarias cumple con el Decreto 16/2009 del Gobierno de Canarias, que exige que, dentro de unos plazos, se realice un informe del estado en seguridad contra incendios en dicho establecimiento, y en caso de ser desfavorable, actuar en consecuencia. El proyecto se puede dividir en tres partes en las que se han aplicado conocimientos diversos, desde estudios hidráulicos, como de gases, hasta mecánic...

  7. Violencia contra mujeres en un entorno de desigualdad social: homicidios dolosos en Tijuana, Baja California

    OpenAIRE

    David F. Fuentes; Margarita Barajas Tinoco; Silvia Figueroa Ramírez

    2007-01-01

    En este artículo analizamos información correspondiente a homicidios dolosos cometidos contra mujeres residentes de Tijuana, Baja California, durante el periodo 2000-2005. Además de presentar el perfil social de víctimas y victimarios, se amplía el análisis hacia el móvil y modus operandi del hecho. Lo anterior es mediado con la riqueza que proporciona la teoría de género. La información utilizada corresponde a la base de datos generada dentro del proyecto de investigación deno...

  8. Detection of FMD virus type specific IgG1, IgG2 and IgA antibodies in milk and serum of buffaloes vaccinated with oil adjuvanted polyvalent FMD vaccine

    Directory of Open Access Journals (Sweden)

    R. Sharma

    2010-02-01

    Full Text Available The present investigation was carried out on 15 randomly selected milch buffaloes divided into three groups on the basis of lactation at an organized farm, to study the foot and mouth disease virus type specific antibodies in milk and serum following FMD vaccination. Milk and serum samples collected before vaccination i.e. 0 day and on 7, 14, 28, 42 and 56 days post vaccination, were analyzed for the detection of FMD virus specific IgG1, IgG2 and IgA antibody response by indirect double antibody sandwich ELISA. Significant FMD virus type specific antibody titres (IgG1, IgG2 and IgA were detected in milk and serum of buffaloes on different days post vaccination, though the levels of antibodies were lower in milk as compared to serum. FMD virus type specific IgG1 was found to be the predominant subclass as compared to IgG2 and IgA both in milk and serum of vaccinated buffaloes. Milk and serum IgG1, IgG2 and IgA antibody titres were positively correlated with values of regression coefficient (R as 0.506, 0.434 and 0.396, respectively.

  9. Bancroftian filariasis: the patterns of filarial-specific immunoglobulin G1 (IgG1), IgG4, and circulating antigens in an endemic community of northeastern Tanzania

    DEFF Research Database (Denmark)

    Simonsen, P E; Lemnge, M M; Msangeni, H A;

    1996-01-01

    The profile of filarial-specific immunoglobulin G1 (IgG1), IgG4, and Wuchereria bancrofti-specific circulating antigen (Og4C3) was analyzed in individuals one year of age and older in a community with high endemicity for Bancroftian filariasis. The overall microfilarial (mf) prevalence...

  10. El derecho a la tutela judicial efectiva en el Derecho Europeo y las sanciones contra Al Qaeda

    OpenAIRE

    Hinojosa-Mart??nez, Luis M.; P??rez-Bern??rdez, Carmela

    2012-01-01

    La proliferaci??n de instrumentos internacionales de lucha contra el terrorismo ha planteado importantes desaf??os jur??dicos, tanto al Derecho internacional como al Derecho europeo. Uno de los terrenos donde han aparecido cuestiones m??s complejas e intrincadas ha sido en la dial??ctica entre la salvaguarda de la seguridad y la garant??a de los derechos fundamentales de los individuos. En el plano europeo, la aplicaci??n de las sanciones del Consejo de Seguridad de Naciones Unidas contra Al ...

  11. Justicia y género en Nariño en casos de violencia contra las mujeres

    OpenAIRE

    Goyes Moreno, Isabel; Montezuma M., Sandra

    2012-01-01

    Como resultado de una revisión de los fallos proferidos por los juzgados municipales, los juzgados de circuito y la Sala Penal del Tribunal Superior del Distrito Judicial de Pasto, entre los años 2005 y 2011, en relación con los delitos de violencia cometidos contra mujeres, fue posible establecer que las principales formas de agresión contra la mujer se enmarcan dentro de los delitos de acceso carnal violento, actos sexuales y acceso carnal abusivo con menor de 14 años, homicidio, violencia ...

  12. Subalternidade de gênero: refletindo sobre a vulnerabilidade para violência doméstica contra a mulher

    OpenAIRE

    Laura Christina Macedo Piosiadlo; Rosa Maria Godoy Serpa da Fonseca; Rafaela Gessner

    2014-01-01

    Objetivo: Este artigo tem o objetivo de refletir sobre a violência de gênero praticada contra a mulher no espaço intrafamiliar, sobretudo, a relação entre a subalternidade de gênero no âmbito familiar e a vulnerabilidade para este tipo de violência. Resultados: A subalternidade de gênero e a violência contra mulher apresentam-se entrelaçadas na história e, conformam-se por meio da construção de gênero nas sociedades. As mulheres formam um grupo que é violentado, constantemente, e de dive...

  13. Gênero e violência contra a mulher na literatura de enfermagem: uma revisão

    OpenAIRE

    Maiara Cardoso Duarte; Rosa Maria Godoy Serpa da Fonseca; Vânia de Souza; Érica Dumont Pena

    2015-01-01

    RESUMO Na produção científica sobre desigualdades na relação homens e mulheres destacam-se estudos sobre violência contra a mulher e a premência do seu reconhecimento como problema de saúde pública. Objetivo: considerando o potencial da Enfermagem para um olhar ampliado desta temática, pretendeu-se conhecer o que está sendo veiculado sobre gênero e violência contra a mulher nas principais revistas de enfermagem brasileiras. Método: realizou-se revisão integrativa, de publicações online, entre...

  14. Antagonismo social de las luchas socioambientales: Cuerpo, emociones y subjetividad como terreno de lucha contra la afectación

    OpenAIRE

    Oliver Gabriel Hernández Lara; Mina Lorena Navarro Trujillo

    2010-01-01

    La acumulación por desposesión que plantea David Harvey, nos sitúa en un contexto en el que la captura de los procesos vivos se da cada vez con mayor voracidad. Ante el despojo de los bienes comunes, materiales e inmateriales, está emergiendo un nuevo antagonismo social contra el paradigma extractivo y la mercantilización de la vida. La relación del cuerpo y las emociones emerge como un terreno de lucha contra la afectación ambiental, al mismo tiempo que habilita un tiempo y espacio autónomo ...

  15. Notas sobre a discriminação racial e o seu lugar entre os crimes contra a humanidade

    OpenAIRE

    Jerónimo, Patrícia

    2004-01-01

    Separata Análise dos instrumentos internacionais de direitos humanos que proíbem a discriminação racial, bem como da inclusão da discriminação racial na definição de crimes contra a humanidade no Estatuto do Tribunal Penal Internacional. A discriminação racial como crime contra a humanidade no Código Penal português. Limitações da definição do tipo legal de crime de discriminação racial.

  16. Un regimen sanitatis contra la peste: el tratado del licenciado Vázquez

    Directory of Open Access Journals (Sweden)

    de la Peña Barroso, Efrén

    2012-12-01

    Full Text Available The regimina pestis or plague treatises are the main literary genre where late medieval doctors reflected their medical concern about plague and pestilences. These medical texts, in which some practical recommendations were given to people to avoid and/or cure the effects of epidemic disease of high letality, were developed since the outbreak of the epidemic in 1348. The text now presented is a treatise on plague written by the «licenciado Vázquez», a converso from the archbishopric of Toledo who was tried by the Inquisition at the beginning of the 16th Century.Los regimientos o tratados contra la peste o pestilencia son expresión del modo en que los médicos universitarios bajomedievales hicieron frente a la enfermedad epidémica de alta letalidad. Estos textos médicos, que consistían en un repertorio más o menos amplio de recomendaciones prácticas para prevenir y/o tratar dicha enfermedad, experimentaron un notable desarrollo a partir de la peste negra de 1348. El texto que se ofrece a continuación es un tratado inédito contra la peste escrito por el licenciado Vázquez, un judeoconverso toledano que fue procesado por el Tribunal de la Inquisición a principios del siglo XVI.

  17. Thomas Mann: um escritor contra o nazismo Thomas Mann: a writer against nazism

    Directory of Open Access Journals (Sweden)

    Sonia Dayan-Herzbrun

    1997-01-01

    Full Text Available O combate que Thomas Mann travou contra o nazismo a partir de 1922 é exemplar, pois é o de um escritor apaixonado pela liberdade e não o de um militante. Ele privilegia a ficção e o mito como meios de luta contra o fascínio exercido pelo nazismo e afirma a permanência de uma Alemanha cultural, cosmopolita, fonte de uma universalidade estranha a todos os particularismos étnicos. Goethe, com quem ele se identifica e no qual se projeta, é a figura de proa dessa Alemanha.Thomas Mann's attack, from 1922 onwards, against Nazism is exemplar in the sense that it was promoted by a writer committed to the defence of liberty and not by a militant. He underlines fiction and myth as ways of fighting against the charms of Nazism and proclaims the permanence of a cultural, cosmopolitan Germany, a source of a universality which is alien to all kinds of ethnic particularities. Goethe, someone he is identified with, is the prominent figure of this Germany.

  18. Blade rows interaction in contra-rotating axial flow pump designed with different rotational speed concept

    International Nuclear Information System (INIS)

    The contra-rotating axial flow pump consisiting of counter-rotating tandem rotors has been expermentally confirmed with better performances than the conventional axial flow pump, but it is known to suffer from the significant potential interaction between the counter-rotating blade rows, which is responsible for the repetitive stresses and unfavourable to the reliable operation. Consequently, to improve the realiability of contra-rotating axial flow pump including the reduction of the blade rows interaction, a new type of rear rotor was designed in the previous study by the rotational speed optimization methodology with some additional considerations. In the present study, to understand the effectiveness of the new design method, instantaneous static pressure fluctuations on the casing wall under the design and off design conditions are investigated by means of experimental and numerical simulation methods. The Fourier analysis is employed to process the data obtained from experiments and numerical simulations, and the axial distribution of the Blade Passing Frequency (BPF) amplitude is obtained. The new rear rotor shows weakened BPF amplitude both upstream and downstream especially at the positions between the two blade rows in both CFD and EFD analyses, implying the reduced blade rows interaction with the new rear rotor

  19. Vacunas terapéuticas recombinantes contra el cáncer del cuello uterino

    Directory of Open Access Journals (Sweden)

    BERUMEN JAIME

    1997-01-01

    Full Text Available Durante el desarrollo del cáncer cervicouterino se inducen mecanismos para evadir el sistema inmune, como son la disminución de la expresión de moléculas de antígeno mayor de histocompatibilidad I y la secreción de citocinas por las células tumorales. Como consecuencia de ello, la estimulación de linfocitos T citotóxicos (LTC y cooperadores (TC, de células asesinas naturales (AN y macrófagos es muy deficiente. Para inducir una respuesta inmune efectiva contra el tumor, se requiere la estimulación simultánea de múltiples componentes del sistema inmune: por vía sistémica la estimulación de LTC y TC contra epítopos del virus del papiloma humano, y en un nivel local, la inducción de la secreción de citocinas por el tumor, para aumentar el procesamiento y la presentación de blancos tumorales, así como la estimulación de los linfocitos, AN y macrófagos que infiltran el tumor.

  20. Potencial de antagonismo de isolados de Trichoderma sp. contra o isolados de Fusarium sp., in vitro

    Directory of Open Access Journals (Sweden)

    Charles Anthony Hoffmann

    2015-06-01

    Full Text Available Resumo – O uso discriminado de agrotóxicos acarreta em uma grande prejuízo a saúdes das pessoas e do meio ambiente. O uso de novos métodos de combate a pragas se faz necessário para o equilíbrio da cadeia produtiva. A utilização de microrganismos no combate a pragas se faz como uma boa alternativa. O trabalho objetivou-se em avaliar o potencial de antagonismo de isolados de Trichoderma sp. contra o patógeno Fusarium sp. in vitro. Para isso foi utilizado os métodos de confronto direto, pareamento de culturas e de metabólitos voláteis. Os experimentos foram realizados na incubadora de empresas da Universidade Federal do Tocantins – UFT Campus de Gurupi, seguiram com três repetições. Foram testados 15 isolados do antagonista em confronto direto com o patógeno e os mesmos isolados e patógeno foram testados em metabólitos voláteis ambos utilizando o meio de cultura BDA. Todos os isolados apresentaram antagonismo in vitro contra o patógeno.