The disulfide isomerase ERp57 is required for fibrin deposition in vivo.
The disulfide isomerase ERp57 is required for fibrin deposition in vivo.
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DOI:
10.1111/jth.12709
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发表时间:
2014-11
期刊:
影响因子:
--
通讯作者:
Essex DW
中科院分区:
文献类型:
--
作者:
Zhou J;Wu Y;Wang L;Rauova L;Hayes VM;Poncz M;Essex DW
ERp57 is required for platelet function; however, whether ERp57 contributes to fibrin generation is unknown. Using an inhibitory anti-ERp57 antibody (Mab1), Pf4-Cre/ERp57fl/fl mice, Tie2-Cre/ERp57fl/fl mice, and mutants of ERp57, we analyzed the function of ERp57 in laser-induced thrombosis. Fibrin deposition was decreased in Pf4-Cre/ERp57fl/fl mice consistent with a role for platelet ERp57 in fibrin generation. Fibrin deposition was further decreased with infusion of Mab1 and in Tie2-Cre/ERp57fl/fl mice consistent with endothelial cells also contributing to fibrin deposition. Infusion of eptibifatide inhibited platelet and fibrin deposition, confirming a role for platelets in fibrin deposition. Infusion of recombinant ERp57 corrected the defect in fibrin deposition but not platelet accumulation suggesting a direct effect of ERp57 on coagulation. Mab1 inhibited thrombin generation in vitro consistent with a requirement for ERp57 in coagulation. Platelet accumulation was decreased to a similar extent in Pf4-Cre/ERp57fl/fl mice, Tie2-Cre/ERp57fl/fl mice and normal mice infused with Mab1. Infusion of completely inactivated ERp57 or ERp57 with a nonfunctional second active site inhibited fibrin deposition and platelet accumulation, indicating that the isomerase activity of the second active site is required for these processes. ERp57 regulates thrombosis via multiple targets.
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