Effect of Allopurinol on Clinical Outcomes in Inflammatory Bowel Disease Nonresponders to Azathioprine or 6-Mercaptopurine  Miles P. Sparrow, Scott A.

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Effect of Allopurinol on Clinical Outcomes in Inflammatory Bowel Disease Nonresponders to Azathioprine or 6-Mercaptopurine  Miles P. Sparrow, Scott A. Hande, Sonia Friedman, Dingcai Cao, Stephen B. Hanauer  Clinical Gastroenterology and Hepatology  Volume 5, Issue 2, Pages 209-214 (February 2007) DOI: 10.1016/j.cgh.2006.11.020 Copyright © 2007 AGA Institute Terms and Conditions

Figure 1 Metabolism of 6-mercaptopurine. (HPRT, hypoxanthine phosphoribosyltransferase; 6-TIMP, 6-thiosine 5′-monophosphate; IMPDH, inosine monophosphate dehydrogenase; 6-TXMP, 6-thioxanthosine monophosphate; GMPS, guanosine monophosphate synthetase). Clinical Gastroenterology and Hepatology 2007 5, 209-214DOI: (10.1016/j.cgh.2006.11.020) Copyright © 2007 AGA Institute Terms and Conditions

Figure 2 (A) Increase in 6-TGN (pmol/8 × 108 RBCs) after the addition of allopurinol. (B) Decrease in 6-MMP (pmol/8 × 108 RBCs) after the addition of allopurinol. Clinical Gastroenterology and Hepatology 2007 5, 209-214DOI: (10.1016/j.cgh.2006.11.020) Copyright © 2007 AGA Institute Terms and Conditions

Figure 3 Reduction in disease activity scores after the addition of allopurinol. Clinical Gastroenterology and Hepatology 2007 5, 209-214DOI: (10.1016/j.cgh.2006.11.020) Copyright © 2007 AGA Institute Terms and Conditions

Figure 4 Reduction in mean daily prednisone dosage (mg) after the addition of allopurinol in the combined cohort, CD and UC patients. Clinical Gastroenterology and Hepatology 2007 5, 209-214DOI: (10.1016/j.cgh.2006.11.020) Copyright © 2007 AGA Institute Terms and Conditions

Figure 5 Reduction in mean hepatic transaminase levels (ALT, AST [IU]) after the addition of allopurinol. Clinical Gastroenterology and Hepatology 2007 5, 209-214DOI: (10.1016/j.cgh.2006.11.020) Copyright © 2007 AGA Institute Terms and Conditions