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Kappadione is a Vitamin K derivative (chemically, it is menadiol sodium diphosphate), previously approved by FDA prior to 1982 and marketed by Lilly Marketing for this drug has been discontinued and is not available in North America . It has been found to have carcinogenic potential in mammalian cells as well as cytotoxic properties . Studies involving the active metabolite of this formulation, menadione, showed oocyte toxicity in a study of mice .
Kappadione is a Vitamin K derivative (chemically, it is menadiol sodium diphosphate), previously approved by FDA prior to 1982 and marketed by Lilly Marketing for this drug has been discontinued and is not available in North America . It has been found to have carcinogenic potential in mammalian cells as well as cytotoxic properties . Studies involving the active metabolite of this formulation, menadione, showed oocyte toxicity in a study of mice .
Menadiol sodium phosphate (vitamin K3) is involved as a cofactor in the posttranslational gamma-carboxylation of glutamic acid residues of various proteins in the body, allowing for propagation of the clotting cascade that results in coagulation. These proteins are comprised of the vitamin K-dependent coagulation factors II (prothrombin), VII (proconvertin), IX (Christmas factor), X (Stuart factor), protein C, protein S, protein Zv and a growth-arrest-specific factor (Gas6). The two vitamin K-dependent proteins found in bone are osteocalcin, also known as bone G1a (gamma-carboxyglutamate) protein or BGP, and the matrix G1a protein or MGP. Gamma-carboxylation is catalyzed by the vitamin K-dependent gamma-carboxylases. The reduced form of vitamin K, vitamin K hydroquinone, is the actual cofactor for the gamma-carboxylases. Proteins containing gamma-carboxyglutamate are called G1a proteins .
Anticoagulant-induced prothrombin deficiency caused by coumadin or indanedione derivatives, prophylaxis and therapy of hemorrhagic disease of the newborn, hypoprothrombinemia due to antibacterial therapy, hypoprothrombinemia secondary to factors limiting absorption or synthesis of vitamin K (for example, obstructive jaundice, biliary fistula, sprue, ulcerative colitis, celiac disease, intestinal resection, cystic fibrosis of the pancreas, and regional enteritis, other drug-induced hypoprothrombinemia where it is definitely shown that the result is due to interference with vitamin K metabolism) .
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