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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 ...
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 circulating anticoagulant, which ...
The protein C pathways are the specific chemical reactions that control the level of expression of APC and its activity in the body. [7]: 34 Protein C is pleiotropic, with two main classes of functions: anticoagulation and cytoprotection (its direct effect on cells). Which function protein C performs depends on whether or not APC remains bound ...
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).
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.
Specific activity gives a measurement of enzyme purity in the mixture. It is the micro moles of product formed by an enzyme in a given amount of time (minutes) under given conditions per milligram of total proteins. Specific activity is equal to the rate of reaction multiplied by the volume of reaction divided by the mass of total protein.
10544 19124 Ensembl ENSG00000101000 ENSMUSG00000027611 UniProt Q9UNN8 Q64695 RefSeq (mRNA) NM_006404 NM_011171 RefSeq (protein) NP_006395 NP_035301 Location (UCSC) Chr 20: 35.17 – 35.22 Mb Chr 2: 155.59 – 155.6 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Endothelial protein C receptor (EPCR) also known as activated protein C receptor (APC receptor) is a protein that in humans ...
The "lupus anticoagulant paradox" [6] may be explained by platelet activation as described above, as well as enhancement of activated protein C resistance and suppression of the anticoagulant activity of TFPIα. Another proposed mechanism is the antibody-mediated destruction of Annexin A5 on the membranes of endothelial cells and trophoblast cells.