Molecular and cellular biology of von Willebrand factor

被引:88
作者
Denis, CV [1 ]
机构
[1] INSERM, U143, F-94276 Le Kremlin Bicetre, France
关键词
von Willebrand factor; hemostasis; Weibel-Palade bodies; vascular endothelium; chaperone protein;
D O I
10.1007/BF02981972
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
von Willebrand factor (VWF) is a plasma protein that performs 2 main functions in hemostasis: it mediates platelet adhesion to the injured vessel wall, and it carries and protects coagulation factor VIII. VWF is synthesized through a multistep process in endothelial cells and megakaryocytes as a very large polymer composed of identical disulfide-linked 250-kd sub units. In endothelial cells, VWF not only directs the formation of its own storage granules, the Weibel-Palade bodies, but it also acts as a chaperone molecule to direct other proteins. such as P-selectin, into these granules. Upon stimulation of the endothelium, the Weibel-Palade bodies will be translocated to the plasma membrane, and their contents will be secreted into the plasma milieu. The expression of VWF can be regulated at different levels by a number of genetic and environmental factors, resulting in control of its activity. New roles for VWF, especially in inflammatory processes, have recently been suggested, indicating that some aspects of this well-studied protein remain to be investigated. Int J Hematol. 2002;75:3-8. (C)2002 The Japanese Society of Hematology.
引用
收藏
页码:3 / 8
页数:6
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