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Acenocoumarol

CAS No:
152-72-7 Categories: , ,
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Product Details:

  • Product Name: Acenocoumarol
  • CAS #: 152-72-7
  • Mode of Action:

    Acenocoumarol inhibits vitamin K reductase, resulting in depletion of the reduced form of vitamin K (vitamin KH2). As vitamin K is a cofactor for the carboxylation of glutamate residues on the N-terminal regions of vitamin K-dependent clotting factors, this limits the gamma-carboxylation and subsequent activation of the vitamin K-dependent coagulant proteins. The synthesis of vitamin K-dependent coagulation factors II, VII, IX, and X and anticoagulant proteins C and S is inhibited resulting in decreased prothrombin levels and a decrease in the amount of thrombin generated and bound to fibrin. This reduces the thrombogenicity of clots.

  • Pharmacodynamics:

    Acenocoumarol inhibits the reduction of vitamin K by vitamin K reductase. This prevents carboxylation of certain glutamic acid residues near the N-terminals of clotting factors II, VII, IX and X, the vitamin K-dependent clotting factors. Glutamic acid carboxylation is important for the interaction between these clotting factors and calcium. Without this interaction, clotting cannot occur. Both the extrinsic (via factors VII, X and II) and intrinsic (via factors IX, X and II) are affected by acenocoumarol.

  • Metabolism:

    Extensively metabolized in the liver via oxidation forming two hydroxy metabolites and keto reduction producing two alcohol metabolites. Reduction of the nitro group produces an amino metabolite which is further transformed to an acetoamido metabolite. Metabolites do not appear to be pharmacologically active.

  • Toxicity:

    The onset and severity of the symptoms are dependent on the individual's sensitivity to oral anticoagulants, the severity of the overdosage, and the duration of treatment. Bleeding is the major sign of toxicity with oral anticoagulant drugs. The most frequent symptoms observed are: cutaneous bleeding (80%), haematuria (with renal colic) (52%), haematomas, gastrointestinal bleeding, haematemesis, uterine bleeding, epistaxis, gingival bleeding and bleeding into the joints. Further symptoms include tachycardia, hypotension, peripheral circulatory disorders due to loss of blood, nausea, vomiting, diarrhoea and abdominal pains.

  • IUPAC: 4-hydroxy-3-[1-(4-nitrophenyl)-3-oxobutyl]-2H-chromen-2-one
  • ATC: B01AA07
  • DrugBank: DB01418
  • Formula: C28H35FO7
  • Molecular Mass: 353.3255
  • Synonyms: Acenocoumarin Acenocoumarolum [INN-latin] Nicoumalone Nicumalon Nitrophenylacetylethyl-4-hydroxycoumarine Nitrovarfarian Nitrowarfarin
  • SMILES: CC(=O)CC(C1=CC=C(C=C1)[N+]([O-])=O)C1=C(O)C2=CC=CC=C2OC1=O
  • AHFS Code: 20:12.04.08
  • InChl: VABCILAOYCMVPS-UHFFFAOYSA-N
  • General Reference:

    1. Cesar JM, Garcia-Avello A, Navarro JL, Herraez MV: Aging and oral anticoagulant therapy using acenocoumarol. Blood Coagul Fibrinolysis. 2004 Oct;15(8):673-6. Pubmed
    2. Lengyel M: [Warfarin or acenocoumarol is better in the anticoagulant treatment of chronic atrial fibrillation?] Orv Hetil. 2004 Dec 26;145(52):2619-21. Pubmed
    3. Ufer M: Comparative pharmacokinetics of vitamin K antagonists: warfarin, phenprocoumon and acenocoumarol. Clin Pharmacokinet. 2005;44(12):1227-46. Pubmed
    4. Montes R, Ruiz de Gaona E, Martinez-Gonzalez MA, Alberca I, Hermida J: The c.-1639G > A polymorphism of the VKORC1 gene is a major determinant of the response to acenocoumarol in anticoagulated patients. Br J Haematol. 2006 Apr;133(2):183-7. Pubmed
    5. Girard P, Nony P, Erhardtsen E, Delair S, Ffrench P, Dechavanne M, Boissel JP: Population pharmacokinetics of recombinant factor VIIa in volunteers anticoagulated with acenocoumarol. Thromb Haemost. 1998 Jul;80(1):109-13. Pubmed

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