Genetic variants in TPMT and COMT are associated with hearing loss in children receiving cisplatin chemotherapy by Ross Colin J D, Katzov-Eckert Hagit, Dubé Marie-Pierre, Brooks Beth, Rassekh S Rod, Barhdadi Amina, Feroz-Zada Yassamin, Visscher Henk, Brown Andrew M K, Rieder Michael J, Rogers Paul C, Phillips Michael S, Carleton Bruce C, Hayden Michael R, CPNDS Consortium in Nature genetics (2009). PubMed

Abstract

Cisplatin is a widely used and effective chemotherapeutic agent, although its use is restricted by the high incidence of irreversible ototoxicity associated with it. In children, cisplatin ototoxicity is a serious and pervasive problem, affecting more than 60% of those receiving cisplatin and compromising language and cognitive development. Candidate gene studies have previously reported associations of cisplatin ototoxicity with genetic variants in the genes encoding glutathione S-transferases and megalin. We report association analyses for 220 drug-metabolism genes in genetic susceptibility to cisplatin-induced hearing loss in children. We genotyped 1,949 SNPs in these candidate genes in an initial cohort of 54 children treated in pediatric oncology units, with replication in a second cohort of 112 children recruited through a national surveillance network for adverse drug reactions in Canada. We identified genetic variants in TPMT (rs12201199, P value = 0.00022, OR = 17.0, 95% CI 2.3-125.9) and COMT (rs9332377, P value = 0.00018, OR = 5.5, 95% CI 1.9-15.9) associated with cisplatin-induced hearing loss in children.

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