A functional Ser326Cys polymorphism in hOGG1 is associated with noise-induced hearing loss in a Chinese population

PLoS One. 2014 Mar 5;9(3):e89662. doi: 10.1371/journal.pone.0089662. eCollection 2014.

Abstract

DNA damage to cochlear hair cells caused by 8-oxoguanine (8-oxoG) is essential for the development of noise-induced hearing loss (NIHL). Human 8-oxoG DNA glycosylase1 (hOGG1) is a key enzyme in the base excision repair (BER) pathway that eliminates 8-oxoG. Many epidemiological and functional studies have suggested that the hOGG1 Ser326Cys polymorphism (rs1052133) is associated with many diseases. The purpose of this investigation was to investigate whether the hOGG1 Ser326Cys polymorphism in the human BER pathway is associated with genetic susceptibility to NIHL in a Chinese population. This polymorphism was genotyped among 612 workers with NIHL and 615 workers with normal hearing. We found that individuals with the hOGG1 Cys/Cys genotype had a statistically significantly increased risk of NIHL compared with those who carried the hOGG1 Ser/Ser genotype (adjusted OR=1.59, 95% CI=1.13-2.25) and this increased risk was more pronounced among the workers in the 15- to 25- and >25-year noise exposure time, 85-92 dB(A) noise exposure level, ever smoking, and ever drinking groups, similar effects were also observed in a recessive model. In summary, our data suggested that the hOGG1 Cys/Cys genotype may be a genetic susceptibility marker for NIHL in the Chinese Han population.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Amino Acid Substitution
  • Case-Control Studies
  • DNA Glycosylases / genetics*
  • Female
  • Gene Frequency
  • Genetic Association Studies
  • Genetic Predisposition to Disease
  • Hearing Loss, Noise-Induced / enzymology
  • Hearing Loss, Noise-Induced / genetics*
  • Humans
  • Male
  • Middle Aged
  • Polymorphism, Single Nucleotide

Substances

  • DNA Glycosylases
  • oxoguanine glycosylase 1, human

Grants and funding

This study was mainly supported by Jiangsu Province's Outstanding Medical Academic Leader program (LJ201130), and was partly supported by Natural Science Foundation of Jiangsu Province (BK2010080), the Key Program for Basic Research of Jiangsu Provincial Department of Education (08KJA330001). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.