Factor v leiden thrombophilia is an inherited disorder of blood clotting. All offspring of a factor v leiden homozygote will inherit at least a single copy of the mutation. This mutation can increase your chance of developing abnormal blood clots, most commonly in your legs or lungs. Factor v leiden is a gain of function mutation because activated factor v is less sensitive to inactivation by apc, which facilitates the formation of more thrombin. Resistance to activated protein c and a novel factor v gene mutation. Factor v leiden thrombophilia is characterized by a poor anticoagulant response to activated protein c apc and an increased risk for venous thromboembolism vte. That means you were born with a gene mutation that causes it. Factor v leiden thrombophilia genetics home reference nih. Factor v leiden rs6025 is a variant mutated form of human factor v one of several substances that helps blood clot, which causes an increase in blood clotting hypercoagulability.
The mutant factor v is referred to as factor v leiden because dutch. Deep vein thrombosis dvt is the most common vte, with the legs being the most common site. The clinical expression of factor v leiden thrombophilia is influenced by the following. Haplotype analysis of the factor v gene strongly suggests that the mutation. Factor v leiden is the name of a specific gene mutation that results in thrombophilia, which is an increased tendency to form abnormal blood clots that can block blood vessels.
Less than two decades of its discovery, the pathophysiology, clinical consequences, and therapeutic management of the thrombophilic state associated to this condition remains object of controversies 6. Due to this mutation, protein c, an anticoagulant protein which normally inhibits the proclotting activity of factor v. Genetic testing for the factor v leiden mutation also is available. Factor v leiden fvl is the most common genetic risk factor for venous thromboembolism vte and occurs in about 5% of the caucasian population. Factor v leiden, also called fvl, is a disorder that keeps your blood from clotting like it should. Factor v leiden is the most common inherited form of thrombophilia. The frequency of homozygosity for factor v leiden in white populations is approximately 1 in 5000. Heterozygous carriers of this mutation have a four to eightfold increased risk of thrombosis.
Individuals homozygous for the mutation ie, they have a copy of the mutation on each chromosome carry an 80 to 100fold risk of thrombosis. Understanding thrombophilia genetics of thrombophilia. People can inherit one or two copies of the factor v leiden gene mutation. Factor v leiden and inflammation pubmed central pmc. Most people with factor v leiden never develop abnormal clots. Factor v leiden thrombophilia genetic and rare diseases. This test detects the factor v r506q leiden mutation and will help identify those. If you have the factor v leiden mutation, you have an inherited thrombophilia or. Many women with the factor v leiden mutation develop clots during.
This condition should not be confused with factor v deficiency, an inherited bleeding disorder that can cause excessive bleeding following surgery or trauma. Factor v leiden fvl is a genetic clotting disorder. Factor v leiden is the name of a specific gene mutation that results in thrombophilia, which is an increased tendency to form abnormal blood clots. Factor v leiden thrombophilia genetics in medicine. The different gene that makes the factor v leiden protein is inherited from one or both parents. Factor v leiden fvl is the name of a specific gene mutation which leads to a hypercoagulability state with serious clinical consequences. Factor v leiden mutation analysis integrated genetics. This is caused by a change mutation in the gene for this protein. Factor v leiden faktur five liden is a mutation of one of the clotting factors in the blood. Factor v leiden is a genetic disorder characterized by a poor anticoagulant response. It is considered to be a moderate risk factor for vte, and its clinical expression is influenced by coexisting genetic factors, in addition to acquired and circumstantial risk factors.
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