Effects of gene-environmental interaction on noise-induced hearing threshold levels for high frequencies (HTLHF).
Environ Sci Technol
; 45(17): 7128-34, 2011 Sep 01.
Article
in En
| MEDLINE
| ID: mdl-21786748
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.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Polymorphism, Genetic
/
Glutathione S-Transferase pi
/
Gene-Environment Interaction
/
Glutathione Transferase
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Hearing Loss, Noise-Induced
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Noise, Occupational
Limits:
Adult
/
Animals
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Humans
/
Male
/
Middle aged
Language:
En
Journal:
Environ Sci Technol
Year:
2011
Document type:
Article
Affiliation country:
Taiwan