人凝血因子Ⅸ (Alphanine Sd, Balfaxar, Beriplex +3)

概览

Coagulation Factor IX Human is a coagulation factor used to treat hemophilia B or factor IX hemophilia.

作用机制

Coagulation Factor IX is an important protein in the process of hemostasis and normal blood clotting as it plays a key role within the coagulation cascade. It is located within the blood plasma as a zymogen, an antecedent to enzymatic function, in its inactivated state. Factor IX is dependent on the presence of Vitamin K, and is activated to a serine protease by the function of Coagulation Factor XIa. Factor XIa cleaves the peptide bond associated with protein activation in Factor IX, leaving Factor IX with two exposed chains, a light chain and a heavy chain. These two chains are held together by several disulfide bonds that reinforce the structure of Factor IX's activated form. After being activated, Factor IX forms a complex with calcium ions, membrane phospholipids and Coagulation Factor VIII to activate Coagulation Factor X. The activation of Factor X then performs a similarly integral step in the blood coagulation cascade. The ultimate result of phenotypically normal coagulation factors is the creation of platelets for normal blood clotting.

适应症

Factor IX is used to treat Christmas disease. Factor IX deficiency is treated by injection factor IX produced from human plasma. Tranexamic acid may be of value in patients undergoing surgery who have inherited factor IX deficiency in order to reduce the perioperative risk of bleeding.

• Acquired Coagulation Factor Deficiency
• Bleeding caused by Hemophilia B
• Major Bleeding
• Vitamin K antagonist induced major bleeding