The many faces of tissue factor.

The many faces of tissue factor.
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DOI:
10.1111/j.1538-7836.2009.03368.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:
Mackman N
Mackman N
中科院分区:
其他
文献类型:
--
作者:
Mackman N

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组织因子(TF)是细胞因子受体超家族的成员,并结合FVII/VIIa。TF:FVIIa复合物具有促凝血和信号传导活性。它在许多生物过程中发挥作用,包括止血、血栓形成、炎症、血管生成和肿瘤生长。重要的是,TF对止血至关重要。然而,动脉粥样硬化斑块内TF表达增加和循环TF阳性微粒水平升高促进血栓形成。TF通过增强血管内纤维蛋白沉积、通过增加纤维蛋白的促炎片段的形成和通过产生凝血蛋白酶(包括FVIIa、FXa和凝血酶,其激活蛋白酶激活受体(PAR))来增加炎症。在内毒素血症和脓毒症中,TF依赖性凝血酶生成和树突状细胞上PAR 1的活化增强炎症。最后,TF:FVIIa复合物通过激活PAR 2促进肿瘤生长。
Tissue factor (TF) is a member of the cytokine receptor superfamily and binds FVII/VIIa. The TF:FVIIa complex has both procoagulant and signaling activities. It functions in many biological processes, including hemostasis, thrombosis, inflammation, angiogenesis and tumor growth. Importantly, TF is essential for hemostasis. However, increased TF expression within atherosclerotic plaques and elevated levels of circulating TF-positive micro particles promote thrombosis. TF increases inflammation by enhancing intravascular fibrin deposition, by increasing the formation of pro-inflammatory fragments of fibrin and by generating coagulation proteases, including FVIIa, FXa and thrombin, that activate protease-activated receptors (PARs). In endotoxemia and sepsis, TF-dependent thrombin generation and activation of PAR1 on dendritic cells enhance inflammation. Finally, the TF:FVIIa complex contributes to tumor growth by activating PAR2.
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