Low-dose azathioprine is effective and safe for maintenance of remission in patients with ulcerative colitis

Journal of Gastroenterology
Toshifumi HibiTakashi Shimoyama

Abstract

6-Mercaptopurine (6-MP) and azathioprine (AZA) have been used in patients with Crohn's disease (CD) and ulcerative colitis (UC) for reducing the dose of steroids and maintaining remission. However, some patients treated with 6-MP/AZA develop bone marrow suppression, one of the most serious side effects. The aim of this study was to evaluate the efficacy and safety of low-dose AZA (0.6-1.2 mg/kg per day) for maintaining remission in patients with UC. We also investigated the relationship between bone marrow suppression and thiopurine methyltransferase ( TPMT) mutation in the Japanese population. Study 1. To investigate the frequency of TPMT mutation, findings for 82 patients among 141 patients with UC or CD who were treated with AZA or 6-MP were analyzed retrospectively. Polymerase chain reaction (PCR) methods were used to analyze allele mutations of the TPMT gene. Study 2. A multicenter prospective trial was performed. The subjects were 22 patients with UC with presence of remission for 3 months or more. They were treated with 50 mg/day of AZA, and we evaluated the remission rate at 6 months, adverse side effects, and changes in prednisone doses after the initiation of AZA. Study 1. Seventy-four (91%) of the 82 patients analyze...Continue Reading

Citations

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