Laminin promotes coagulation and thrombus formation in a factor XII-dependent manner.

Laminin promotes coagulation and thrombus formation in a factor XII-dependent manner.
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DOI:
10.1111/j.1538-7836.2010.03850.x
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发表时间:
2010-06
期刊:
Journal of thrombosis and haemostasis : JTH
影响因子:
--
通讯作者:
McCarty OJ
McCarty OJ
中科院分区:
其他
文献类型:
--
作者:
White-Adams TC;Berny MA;Patel IA;Tucker EI;Gailani D;Gruber A;McCarty OJ

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Laminin is the most abundant non-collagenous protein in the basement membrane. Recent studies have shown that laminin supports platelet adhesion, activation and aggregation under flow conditions, highlighting a possible role for laminin in hemostasis. To investigate the ability of laminin to promote coagulation and support thrombus formation under shear. Soluble laminin accelerated factor (F) XII activation in a purified system, and shortened the clotting time of recalcified plasma in a FXI- and FXII-dependent manner. Laminin promoted phosphatidylserine exposure on platelets and supported platelet adhesion and fibrin formation in recalcified blood under shear flow conditions. Fibrin formation in laminin-coated capillaries was abrogated by an antibody that interferes with FXI activation by activated FXII, or an antibody that blocks activated FXI activation of FIX. This study identifies a role for laminin in the initiation of coagulation and the formation of platelet-rich thrombi under shear conditions in a FXII-dependent manner.
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