Effects of gene-environmental interaction on noise-induced hearing threshold levels for high frequencies (HTLHF)

Cheng-Yu Lin, Tung Sheng Shih, Yue Liang Leon Guo, Jiunn-Liang Wu, Yih Min Sun, Peng-Chi Tsai

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

In this study we assessed the interaction between glutathione S-transferase (GST) genetic polymorphisms and noise exposures, with regard to their effect on the hearing threshold levels for high frequencies (HTLHF). Research participants comprised 347 male workers, and each participant's cumulative noise exposure was determined using a job-exposure matrix. Approximately 64.6% of the participants' exposure in L eq-8 h was above 90 dBA. The mean HTLHF was 32.1 dB. A significant dose-response relationship was found between noise exposure and HTLHF. We further converted the estimated total noise exposure level over each participant's job history to a noise exposure level that corresponded to a 40-year exposure (L eq-40y). After we had adjusted the results for age, we found that workers carrying GSTM1 null, GSTT1 null, and GSTP1 Ile 105/Ile 105 genotypes were susceptible to the HTLHF when their L eq-40y were above 90 dBA. Therefore, GST genetic polymorphisms might affect HTLHF only when workers are exposed to high noise levels.

Original languageEnglish
Pages (from-to)7128-7134
Number of pages7
JournalEnvironmental Science and Technology
Volume45
Issue number17
DOIs
Publication statusPublished - 2011 Sep 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry

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