Coagulation signalling following tissue injury: focus on the role of factor Xa

The International Journal of Biochemistry & Cell Biology
Malvina A KrupiczojcRachel C Chambers

Abstract

The primary function of the coagulation cascade is to promote haemostasis and limit blood loss in response to tissue injury. However, it is now recognized that the physiological functions of the coagulation cascade extend beyond blood coagulation and that this cascade plays a pivotal role in influencing inflammatory and tissue repair responses via the activation of their signalling responses, the proteinase-activated receptors (PARs). Consequently, uncontrolled coagulation activity and PAR signalling contributes to the pathophysiology of several conditions, including thrombosis, arthritis, cancer, kidney disease, and acute and chronic lung injury. Much of the work thus far has focused on the role of thrombin-mediated signalling in the pathophysiology of these conditions. However, recent evidence suggests that coagulation proteinases upstream of thrombin, including factor Xa (FXa), may also signal via PARs and thus induce cellular effects independent of thrombin generation. These studies have highlighted a novel and important role for FXa signalling in influencing proinflammatory and pro-fibrotic effects following tissue injury. This article will provide an overview of FXa as a central proteinase of the coagulation cascade and w...Continue Reading

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