Factor VIII (FVIII) is an essential clotting factor. The lack of normal FVIII causes Hemophilia A, an inherited bleeding disorder.

Genetics

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The gene for Factor VIII is located on the X chromosome (Xq28).

Physiology

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FVIII is a glycoprotein procofactor synthesized and released into the bloodstream by the liver. In the circulating blood, it is mainly bound to von Willebrand factor (vWF, also known as Factor VIII-related antigen) to form a stable complex. Upon activation by thrombin or factor Xa, it dissociates from the complex to interact with Factor IXa the coagulation cascade. It is a cofactor to Factor IXa in the activation of Factor X, which, in turn, with its cofactor Factor Va, activates more thrombin. Thrombin cleaves fibrinogen into fibrin which polymerizes and crosslinks (using Factor XIII) into a blood clot.

More on [ Factor VIII ]

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Prophylactic antihemophilic factor approved for hemophilia A http://sbne.ws/r/2AmT
cocofeeney (Clara Song) Thu, 20 Aug 2009 01:49:00 -0000
Prophylactic antihemophilic factor approved for hemophilia A http://sbne.ws/r/2AmT
@MedscapeStudent FDA Approves Antihemophilic Factor for Routine Prophylaxis in Children With Hem.. http://bit.ly/11on9Q
cards4students (Flash Cards Anatomy) Wed, 19 Aug 2009 03:21:37 -0000
@MedscapeStudent FDA Approves Antihemophilic Factor for Routine Prophylaxis in Children With Hem.. http://bit.ly/11on9Q
FDA Approves Antihemophilic Factor for Routine Prophylaxis in Children With Hemophilia A http://cli.gs/2yrVE
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