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Year : 2013  |  Volume : 15  |  Issue : 64  |  Page : 160--164

Interleukin-1β gene polymorphism and hearing loss related to the history of occupational noise exposure in Brazilian elderly

Luiz C. L. Carvalho1, Luciana L. M. Marchiori2, Juliana J Melo2, Sandra M Maciel3, Regina C Poli-Frederico1 
1 Department of Molecular Biology - Centre of Research in Health Sciences, University of Northern Parana, Londrina-PR, Brazil
2 Department of Audiology and Speech Therapy, University of Northern Parana, Londrina-PR, Brazil
3 Department of Pediatric Dentistry, Dental School, Maringa State University, Maringá - Paraná, Brazil

Correspondence Address:
Regina C Poli-Frederico
Department of Molecular Biology, Centre of Research in Health Sciences, University of Northern Parana (UNOPAR). Paris Avenue 675, Jd. Piza, CEP 86041-140, Londrina, PR
Brazil

Hearing loss is the most common sensory impairment in older people, and may have social and psychological consequences, such as social isolation, frustration and depression. Noise-induced hearing loss (NIHL) is an interaction of both genetic and environmental factors. Some studies have led to the identification of possible NIHL susceptibility genes. The aim of the present study was to investigate whether the polymorphism of the interleukin (IL)-1β gene at position + 3954 was associated with complaints of hearing loss due to occupational exposure. The sample was composed of elderly people with hearing loss (age ≥ 60 years) divided into two groups: 99 with occupational exposure to noise and 193 without exposure. Information on occupational exposure to noise was obtained through interviews using a semi-structured questionnaire. Hearing acuity was measured from 500 to 6000 Hz and the IL-1β genotype was obtained by the polymerase chain reaction- restriction fragment length polymorphism technique. Differences in allelic and genotypic frequencies, and the association between genotypic frequencies and complaints of hearing loss due to occupational exposure, were analyzed by the Chi-square test at the 5% significance level. Fifty-one percent of the elderly were homozygous for the ancestral allele (C), 17.2% were homozygous for the polymorphic allele (T) and 31.8% were heterozygous. The frequency was found to be 67-33% C to allele T. There was no significant association between polymorphism in gene IL-1β and hearing loss associated with occupational exposure (χ2 = 0.538; P = 0.676). No association was found with the polymorphism of the IL-1β +3954 C/T gene and hearing loss associated with the occupational noise exposure history.


How to cite this article:
Carvalho LC, Marchiori LL, Melo JJ, Maciel SM, Poli-Frederico RC. Interleukin-1β gene polymorphism and hearing loss related to the history of occupational noise exposure in Brazilian elderly.Noise Health 2013;15:160-164


How to cite this URL:
Carvalho LC, Marchiori LL, Melo JJ, Maciel SM, Poli-Frederico RC. Interleukin-1β gene polymorphism and hearing loss related to the history of occupational noise exposure in Brazilian elderly. Noise Health [serial online] 2013 [cited 2020 Jul 4 ];15:160-164
Available from: http://www.noiseandhealth.org/article.asp?issn=1463-1741;year=2013;volume=15;issue=64;spage=160;epage=164;aulast=Carvalho;type=0