Mechanisms of Platelet Activation and Integrin alphaIIbeta3
Korean Circulation Journal
;
: 295-301, 2012.
Artículo
en Inglés
| WPRIM
| ID: wpr-224454
ABSTRACT
Platelet aggregation is not only an essential part of hemostasis, but also initiates acute coronary syndrome or ischemic stroke. The precise understanding of the activation mechanism of platelet aggregation is fundamental for the development of more effective agents against platelet aggregation. Adenosine diphosphate, thrombin, and thromboxane A2 activate platelet integrin alphaIIbbeta3 through G protein-coupled receptors. G protein-mediated signaling pathways, which are initiated by Gq, G12/G13 or Gi, include phospholipase C with calcium signaling, Rho signaling, protein kinase C and phosphatidylinositol 3-kinase. Rap1b, Ca2+ and diacylglycerol-regulated guanine nucleotide exchange factor I, Rap1-GTP-interacting adaptor molecule, and Akt are important proteins involved in G protein-mediated activation of integrin alphaIIbbeta3. Binding of talin-1 and kindlin-3 to cytoplasmic domains of beta3-integrin triggers a conformational change in the extracellular domains that increases its affinity for ligands, such as fibrinogen or von Willebrand factor. Fibrinogens act as bridges between adjacent platelets to generate a platelet aggregate.
Texto completo:
Disponible
Índice:
WPRIM (Pacífico Occidental)
Asunto principal:
Fosfolipasas de Tipo C
/
Tromboxano A2
/
Plaquetas
/
Proteína Quinasa C
/
Fibrinógeno
/
Factor de von Willebrand
/
Trombina
/
Proteínas
/
Activación Plaquetaria
/
Adenosina Difosfato
Idioma:
Inglés
Revista:
Korean Circulation Journal
Año:
2012
Tipo del documento:
Artículo
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