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2006, Número S4

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Arch Cardiol Mex 2006; 76 (S4)


Filamina plaquetaria: Una proteína del citoesqueleto integradora de la función celular

García E, Jay D

Idioma: Español
Referencias bibliográficas: 63
Paginas: 67-75
Archivo PDF: 157.34 Kb.


RESUMEN

La activación de receptores celulares por estímulos fisiológicos o exógenos produce cambios dramáticos en la forma y función celulares; tales cambios dependen principalmente de la reestructuración de la malla de actina. En plaquetas se ha obtenido mucha de la información sobre el citoesqueleto. Dentro de las proteínas entrecruzadoras de actina filamentosa (Actina-F) como la espectrina, la fimbrina o la alfa actinina, la Filamina A (FLNa) es la más eficiente en formar geles ortogonales tridimensionales de actina. Además, une al citoesqueleto periférico de actina con la membrana celular a través de su dominio C-terminal de unión a glicoproteínas de membrana. La filamina mantiene la citoarquitectura plaquetaria y es esencial para el movimiento y cambio de formas celulares que suceden durante la activación plaquetaria. Estudios previos han mostrado que una gran variedad de proteínas con distintas funciones tales como traducción de señales, regulación de la transcripción de genes y movilización de receptores se asocian a la filamina, sugiriendo que ésta puede actuar como andamiaje u organizador de proteínas. El propósito de esta comunicación es el de describir brevemente las características de las macromoléculas asociadas a la FLNa plaquetaria y discutir un posible papel de la asociación de éstas a la filamina.


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