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The activated protein C resistance (APCR) test is a coagulation test used in the evaluation and diagnosis of activated protein C (APC) resistance, a form of hypercoagulability. [ 1 ] [ 2 ] Hereditary APC resistance is usually caused by the factor V Leiden mutation, whereas acquired APC resistance has been linked to antiphospholipid antibodies ...
Activated protein C resistance (APCR) Protein C Anticoagulant Pathway: Thrombin escaping from a site of vascular injury binds to its receptor thrombomodulin (TM) on the intact cell surface. As a result, thrombin loses its procoagulant properties and instead becomes a potent activator of protein C. Activated protein C (APC) functions as a ...
Repeated testing for protein C functional activity allows differentiation between transient and congenital deficiency of protein C. [5] [7] Initially, a protein C activity (functional) assay can be performed, and if the result is low, a protein C antigen assay can be considered to determine the deficiency subtype (Type I or Type II).
Protein C, also known as autoprothrombin IIA and blood coagulation factor XIV, [5]: 6822 [6] is a zymogen, that is, an inactive enzyme.The activated form plays an important role in regulating anticoagulation, inflammation, and cell death and maintaining the permeability of blood vessel walls in humans and other animals.
Activated protein C–protein C inhibitor (APC-PCI) is a complex of activated protein C (APC) and protein C inhibitor (PCI). [1] [2] [3] It has been measured in coagulation testing to evaluate coagulation, thrombosis, and other cardiovascular complications. [2] [3] [4] It is a marker of thrombin generation and indicates hypercoagulability.
ETP-based activated protein C resistance test (ETP-based APCR) Thrombodynamics test. Non-homogenous: realization of the three-dimensional model of the clot growth; Use of platelet free plasma; Record of information about the clot formation as a diagram, giving the possibility to calculate the key parameters of the blood coagulation system