Association of smoking habits with TXNIP DNA methylation levels in leukocytes among general Japanese population

Keisuke Maeda, Hiroya Yamada, Eiji Munetsuna, Ryosuke Fujii, Mirai Yamazaki, Yoshitaka Ando, Genki Mizuno, Hiroaki Ishikawa, Koji Ohashi, Yoshiki Tsuboi, Shuji Hashimoto, Nobuyuki Hamajima, Koji Suzuki

研究成果: Article

抜粋

Thioredoxin-interacting protein (TXNIP) inhibits the activity of thioredoxin (TXN), leading to increased oxidative stress. Expression of the TXNIP gene is regulated by DNA methylation. However, no study has reported the influence of lifestyle factors on TXNIP DNA methylation. Our goal was to determine the association between smoking habits and TXNIP DNA methylation levels in a Japanese population. We conducted a cross-sectional study of 417 subjects (180 males and 237 females) participating in a health examination. We used a pyrosequencing assay to determine TXNIP DNA methylation levels in leukocytes. The mean TXNIP DNA methylation level in current smokers (75.3%) was significantly lower than that in never and ex-smokers (never: 78.1%, p < 0.001; ex: 76.9%, p = 0.013). Multivariable logistic regression analyses showed that the OR for TXNIP DNA hypomethylation was significantly higher in current smokers than that in never smokers, and significantly higher in current smokers with years of smoking ≥ 35 and Brinkman Index ≥ 600 compared to that in nonsmokers. In conclusion, we found that current smokers had TXNIP DNA hypomethylation compared to never and ex-smokers. Moreover, long-term smoking and high smoking exposure also were associated with TXNIP DNA hypomethylation.

元の言語English
記事番号e0235486
ジャーナルPloS one
15
発行部数7
DOI
出版物ステータスPublished - 07-2020

All Science Journal Classification (ASJC) codes

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)
  • General

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