Selective sorting of alpha-granule proteins.

Selective sorting of alpha-granule proteins.
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DOI:
10.1111/j.1538-7836.2009.03387.x
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发表时间:
2009-07
期刊:
Journal of thrombosis and haemostasis : JTH
影响因子:
--
通讯作者:
Battinelli EM
Battinelli EM
中科院分区:
其他
文献类型:
--
作者:
Italiano JE Jr;Battinelli EM

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血小板的主要功能之一是分泌多种物质,这些物质可以改变正在形成的血栓,调节血管系统的生长,促进伤口修复,并促进细胞黏附事件。大量分泌的蛋白质中的大部分储存在阿尔法颗粒中。直到最近,人们一直认为,在血小板激活过程中,血小板含有一组均一的α颗粒,它们会经历完全的脱颗粒。本文综述了α颗粒的生物发生和分泌机制,特别是最近的发现,清楚地表明血小板含有不同的α颗粒亚群,在激活过程中经历不同的释放。我们考虑了这一新的血小板分泌模式的含义,讨论了α颗粒生物发生的机制,并综述了α颗粒运输和输送到组装血小板的分子基础。
One of the main functions of blood platelets is to secrete a variety of substances that can modify a developing thrombus, regulate the growth of the vasculature, promote wound repair, and contribute to cell-adhesive events. The majority of this vast array of secreted proteins is stored in alpha-granules. Until recently, it was assumed that platelets contained one homogeneous population of alpha-granules that undergo complete de-granulation during platelet activation. This review focuses on the mechanisms of alpha-granule biogenesis and secretion, with a particular emphasis on recent findings that clearly demonstrate that platelets contain distinct subpopulations of alpha-granules that undergo differential release during activation. We consider the implications of this new paradigm of platelet secretion, discuss mechanisms of alpha-granule biogenesis, and review the molecular basis of transport and delivery of alpha-granules to assembling platelets.
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