期刊
ARTERIOSCLEROSIS THROMBOSIS AND VASCULAR BIOLOGY
卷 39, 期 5, 页码 857-868出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1161/ATVBAHA.118.311787
关键词
blood platelet; cell adhesion; hemostasis; megakaryocyte; thrombosis
资金
- Italian Ministry of Education, University and Research (MIUR): Dipartimenti di Eccellenza Program (2018-2022)-Department of Biology and Biotechnology L. Spallanzani, University of Pavia
- Alzheimer Research UK [ARUK-PG2017A-3]
The focal adhesion kinase family includes 2 homolog members, FAK and Pyk2 (proline-rich tyrosine kinase 2), primarily known for their roles in nucleated cells as regulators of cytoskeletal dynamics and cell adhesion. FAK and Pyk2 are also expressed in megakaryocytes and platelets and are activated by soluble agonists and on adhesion to the subendothelial matrix. Despite high sequence homology and similar molecular organization, FAK and Pyk2 play different roles in platelet function. Whereas FAK serves mostly as a traditional focal adhesion kinase activated downstream of integrins, Pyk2 coordinates multiple signals from different receptors. FAK, but not Pyk2, is involved in megakaryocyte maturation and platelet production. In circulating platelets, FAK is recruited by integrin alpha IIb beta 3 to regulate hemostasis, whereas it plays minimal roles in thrombosis. By contrast, Pyk2 is implicated in platelet activation and is an important regulator of thrombosis. The direct activation of Pyk2 by calcium ions provides a connection between GPCRs (G-protein coupled receptors) and Src family kinases. In this review, we provide the comprehensive overview of >20 years of investigations on the role and regulation of focal adhesion kinases in blood platelets, highlighting common and distinctive features of FAK and Pyk2 in hemostasis and thrombosis.
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