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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Inherited abnormalities in the protein C activation pathway.

The protein C (PC) anticoagulant pathway plays a crucial role in the regulation of fibrin formation via proteolytic degradation of the procoagulant cofactors factor Va and VIIIa by activated PC ( APC). PC circulates in plasma as a zymogen, which is activated, on the surface of endothelial cells by the thrombin-thrombomodulin complex. Another endothelial cell-specific protein, the endothelial cell PC/APC receptor (EPCR), binds PC on the endothelial cell surface and further enhances the rate of PC activation. Normal APC generation depends on the precise assemblage, on the surface of endothelial cells, of at least four proteins: thrombin, thrombomodulin (TM), PC and EPCR. Therefore, any change in the efficiency of this assemblage may cause reduced APC generation and an increase in the risk of thrombosis. In the last years, several reports have suggested the association between mutations in TM and EPCR genes and venous and arterial thrombosis. Surprisingly, no studies have been reported linking mutations with levels of circulating APC, the final product of the interaction between thrombin, TM, PC and EPCR. Here, we describe the previously reported mutations in the TM and EPCR genes, and present the design and evaluation of a new strategy to investigate TM, EPCR, PC and prothrombin gene mutations in arterial and venous thrombosis.[1]


  1. Inherited abnormalities in the protein C activation pathway. España, F., Medina, P., Navarro, S., Estellés, A., Aznar, J. Pathophysiol. Haemost. Thromb. (2002) [Pubmed]
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