volume 46, issue 2, P149-154 1989
DOI: 10.1038/clpt.1989.119
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Abstract: Azathioprine therapy can cause acute myelosuppression. Toxicity is in part caused by the incorporation of azathioprine-derived 6-thioguanine nucleotides (6-TGN) into deoxyribonucleic acid (DNA). The enzyme thiopurine methyltransferase (TPMT) plays an important role in azathioprine catabolism. TPMT activity is controlled by a common genetic polymorphism, and one in 300 subjects has very low enzyme activity. Azathioprine was withdrawn in five study patients because of acute myelosuppression. The duration of azat…

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