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Todas las clases de filamentos intermedios comparten un determinante antigénico común definido por un anticuerpo
Cell
|December 1, 1981
Resumen
Un nuevo anticuerpo monoclonal reconoce todas las clases de filamentos intermedios, incluidas las líneas Z gliales, neurofilamentos y musculares. Esto sugiere un determinante antigénico compartido a través de diversas proteínas de filamento intermedio.
Área de la Ciencia:
- Biología celular Biología celular.
- Inmunología Inmunología.
- Química de las proteínas química de las proteínas.
Sus antecedentes:
- Los filamentos intermedios son una clase diversa de proteínas citoesqueléticas que se encuentran en varios tipos de células.
- Investigaciones anteriores habían identificado proteínas filamentosas intermedias distintas en diferentes tejidos y organismos.
- Faltaba un anticuerpo universal para todas las clases de filamentos intermedios.
Objetivo del estudio:
- Desarrollar un anticuerpo monoclonal capaz de reconocer un amplio espectro de proteínas de filamento intermedio.
- Para investigar la presencia de determinantes antigénicos comunes entre las diferentes proteínas del filamento intermedio.
- Explorar la posible existencia de un componente molecular común en todos los filamentos intermedios.
Principales métodos:
- Producción y caracterización de un nuevo anticuerpo monoclonal.
- Los ensayos de inmunofluorescencia se realizan en varios tipos de células (astrocitos, neuronas, células epiteliales, fibroblastos) y músculo esquelético.
- Electroforesis en gel de SDS-poliacrilamida (SDS-PAGE) para analizar la unión a las proteínas.
- Prueba de la reactividad de los anticuerpos contra las proteínas conocidas de filamento intermedio de vertebrados e invertebrados.
Principales resultados:
- El anticuerpo monoclonal demostró reactividad con todas las clases de filamentos intermedios probados, incluidos los filamentos gliales, los neurofilamentos, los tonofilamentos y los filamentos intermedios de fibroblastos.
- La unión de anticuerpos se observó en las líneas Z en el músculo esquelético.
- El anticuerpo reconoció las principales proteínas del filamento intermedio, como la proteína ácida fibrillar glial, el triplete del neurofilamento, la vimentina, la desmina y las citoceratinas.
- También se une a proteínas de filamento intermedio de invertebrados de calamares y Myxicola.
- Una proteína de aproximadamente 66.000 pesos moleculares fue identificada como un potencial componente común.
Conclusiones:
- Todas las proteínas de filamento intermedio de vertebrados e invertebrados probablemente comparten un determinante antigénico común.
- Los hallazgos sugieren fuertemente una característica estructural conservada o epitopo presente en todas las proteínas del filamento intermedio.
- Una proteína de 66.000 pesos moleculares puede ser un componente ubicuo de filamentos intermedios entre especies.
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