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  • Title: Heparin cofactor II deficiency in renal allograft recipients: no correlation with the development of thrombosis.
    Author: Toulon P, Moulonguet-Doleris L, Costa JM, Aiach M.
    Journal: Thromb Haemost; 1991 Jan 23; 65(1):20-4. PubMed ID: 2024235.
    Abstract:
    Heparin cofactor II (HC II) is a thrombin inhibitor in human plasma which displays great similarities with antithrombin III (AT III). Hereditary HC II deficiency was recently reported to be associated with thrombophilia. Since thromboembolism constitutes an important post-operative complication after renal transplantation, we measured HC II and AT III in the plasma of 118 healthy renal allograft recipients (RAR) and found stable low HC II and high AT III levels. Administration of azathioprine (AZA), cyclosporine A (CSA) or both as immunosuppressive therapy did not affect HC II levels, but CSA seems to have raised plasma AT III. The proportion of patients with HC II deficiency was significantly higher in RAR than the proportion we previously found (11) in healthy individuals (16.9% vs 1.5%). However, the proportions with low plasma HC II were not different in healthy RAR and in ten RAR with thrombotic events, suggesting that in transplanted patients, HC II deficiency is not in itself a risk factor for the development of thrombosis.
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