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Factor V Leiden (rs6025 or F5 p.R506Q [1]) is a variant (mutated form) of human factor V (one of several substances that helps blood clot), which causes an increase ...
Coagulation factor V (Factor V), also less commonly known as proaccelerin or labile factor, is a protein involved in coagulation, encoded, in humans, by F5 gene. [5] In contrast to most other coagulation factors, it is not enzymatically active but functions as a cofactor . [ 5 ]
[1] [5] This ratio is inversely related to the degree of APC resistance. [7] The ETP-based APC resistance test involves the addition of APC to a thrombin generation assay (TGA). [5] This results in an inhibition of thrombin generation as measured by reduction of the endogenous thrombin potential (ETP; area under the thrombin generation curve). [5]
The minor ("type 2") thrombophilias are much more common. Factor V Leiden is present in 5% of the population of Northern European descent, but much rarer in those of Asian or African extraction. In people with thrombosis, 10% have factor V Leiden. In those who are referred for thrombophilia testing, 30–50% have the defect.
APC resistance is the inability of protein C to cleave Factor Va and/or Factor VIIIa, which allows for longer duration of thrombin generation and may lead to a hypercoagulable state. This may be hereditary or acquired. [4] The best known and most common hereditary form is Factor V Leiden, which is responsible for more than 95% of cases. [5]
Splenic infarct seen on CT Healed splenic infarct. Several factors may increase the tendency for clot formation, such as specific infections (such as infectious mononucleosis, [9] [dubious – discuss] [better source needed] cytomegalovirus infection, [10] malaria, [11] or babesiosis [12]), inherited clotting disorders (thrombophilia, such as Factor V Leiden, antiphospholipid syndrome ...
Thromboembolism is a well-described complication of IBD, with a clinical incidence of up to 6% and a three-fold higher risk of disease, [31] [32] and the Factor V Leiden mutation further increases the risk of venous thrombosis. [33] Recent studies describe the co-occurrence between coeliac disease, in which IBD is common in venous thrombosis ...
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