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Genetic Variations in TXNRD1 as Potential Predictors of Drug-Induced Liver Injury

Kwon, JW; Shin, ES; Lee, JE; Kim, SH; Jee, YK; Kim, YK; Park, HS; Min, KU; Park, HW; Adverse Drug Reaction Research Group in Korea
Allergy, asthma & immunology research, 4(3):132-136, 2012
Journal Title
Allergy, asthma & immunology research
PURPOSE: Drug-induced liver injury (DILI) is the most common adverse drug reaction; however, it is not easily predicted. We hypothesize that DILI has a common genetic basis. Based on the findings of previous animal studies on toxic hepatitis, we selected the thioredoxin reductase 1 gene (TXNRD1) as a candidate marker of DILI for this genetic association study.

METHODS: Records from 118 patients with DILI were extracted from the database of the Adverse Drug Reaction Research Group in South Korea. Causative drugs included antituberculosis drugs (n=68, 57.6%), antibiotics (n=22, 18.6%), antiepileptic drugs (n=7, 5.9%), non-steroidal anti-inflammatory drugs (n=5, 4.2%), and others (n=16, 13.7%). Seven single nucleotide polymorphisms (SNPs) in TXNRD1 (rs10735393, rs4964287, rs4595619, rs10861201, rs11111997, rs4246270, and rs4246271) were scored in 118 DILI patients and in 120 drug-matched controls without liver injury.

RESULTS: No differences were found between the frequencies of any of the 7 SNPs in the cases and controls; however, a significant association was found between a TTA haplotype composed of rs10735393, rs4964287, and rs4595619 and DILI using an allele model (odds ratio, 1.79; 95% confidence interval, 1.18-2.73; P=0.008; Bonferroni corrected P=0.024).

CONCLUSIONS: These results suggest that genetic variations in TXNRD1 favor the development of DILI, although a larger confirmative study is needed.
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박, 해심
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