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SummaryTuberculosis (TB) treatment can cause serious sequelae including adverse effects such as anti-TB drug-induced hepatotoxicity (ATDH). We performed a candidate gene-based association study between single nucleotide polymorphisms (SNPs) in 10 genes in the antioxidant pathway and ATDH susceptibility. The subjects comprised 100 Japanese patients with pulmonary TB who received a treatment regimen including isoniazid and rifampicin. Out of them, 18 patients had ATDH. Thirty-four tag SNPs in 10 genes were analyzed by PCR-restriction fragment length polymorphism or PCR-direct DNA sequencing. The frequencies of alleles and genotypes between patients with and without ATDH were compared in three different genetic models. Statistical analyses revealed that a C/C genotype at rs11080344 in NOS2A, a C/C genotype at rs2070401 in

The present study shows that NAT2 is one of the determinants of anti-TB drug-induced hepatotoxicity. Moreover, the haplotypes, NAT2 4 and NAT2 6A, are useful new biomarkers for predicting anti-TB drug-induced hepatotoxicity.

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