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pubmed:abstractText |
Adverse effects of thiopurine drugs occur in 15-28% of patients and the majority is not explained by thiopurine-S-methyltransferase deficiency. Furthermore, approximately 9% of patients with inflammatory bowel disease are resistant to azathioprine therapy. Recently, the small guanosine triphosphatase, Rac1, was identified as an important molecular target of 6-thioguanine triphosphate, one of the active metabolite of thiopurines such as azathioprine. To date, no functional genetic polymorphism of the human Rac1 gene had been reported.
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