Cost-effectiveness of TPMT Pharmacogenetics

Summary

The purpose of this study is to determine whether thiopurine S-methyltransferase (TPMT) genotyping prior to thiopurine use is cost-effective in patients with inflammatory bowel disease (IBD) in need of immune suppression. The study is designed to test the hypothesis that optimization of initial thiopurine dose based on pre-treatment TPMT genotyping will maximize treatment efficacy and minimize adverse drug reactions (ADRs) resulting in reduced costs.

Timeline

Start

2007-09

Primary completion

2011-12

Completion

2011-12

Publications

• Wong DR, Coenen MJ, Derijks LJ, Vermeulen SH, van Marrewijk CJ, Klungel OH, Scheffer H, Franke B, Guchelaar HJ, de Jong DJ, Engels LG, Verbeek AL, Hooymans PM; TOPIC Recruitment Team. Early prediction of thiopurine-induced hepatotoxicity in inflammatory bowel disease. Aliment Pharmacol Ther. 2017 Feb;45(3):391-402. doi: 10.1111/apt.13879. Epub 2016 Dec 12.
• Wong DR, Coenen MJ, Vermeulen SH, Derijks LJ, van Marrewijk CJ, Klungel OH, Scheffer H, Franke B, Guchelaar HJ, de Jong DJ, Engels LG, Verbeek AL, Hooymans PM; TOPIC recruitment team. Early Assessment of Thiopurine Metabolites Identifies Patients at Risk of Thiopurine-induced Leukopenia in Inflammatory Bowel Disease. J Crohns Colitis. 2017 Feb;11(2):175-184. doi: 10.1093/ecco-jcc/jjw130. Epub 2016 Jul 9.
• Coenen MJ, de Jong DJ, van Marrewijk CJ, Derijks LJ, Vermeulen SH, Wong DR, Klungel OH, Verbeek AL, Hooymans PM, Peters WH, te Morsche RH, Newman WG, Scheffer H, Guchelaar HJ, Franke B; TOPIC Recruitment Team. Identification of Patients With Variants in TPMT and Dose Reduction Reduces Hematologic Events During Thiopurine Treatment of Inflammatory Bowel Disease. Gastroenterology. 2015 Oct;149(4):907-17.e7. doi: 10.1053/j.gastro.2015.06.002. Epub 2015 Jun 11.

Drugs

Indications