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BioMed Research International
Volume 2014, Article ID 746838, 6 pages
http://dx.doi.org/10.1155/2014/746838
Research Article

Associations between GJB2, Mitochondrial 12S rRNA, SLC26A4 Mutations, and Hearing Loss among Three Ethnicities

1Department of Otolaryngology-Head and Neck Surgery, The Second Hospital of Lanzhou University, Lanzhou 730030, China
2Department of Otolaryngology-Head and Neck Surgery, Chinese People’s Liberation Army Institute of Otolaryngology, Chinese People’s Liberation Army General Hospital, Beijing 100039, China
3Health Department of Gansu Province, Lanzhou 730030, China

Received 27 February 2014; Accepted 11 March 2014; Published 2 April 2014

Academic Editor: Jareen Meinzen-Derr

Copyright © 2014 Wan Du et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The epidemiological researches show that the mutations of GJB2, mitochondrial 12S rRNA, and SLC26A4 genes have played an important role in the hearing loss. This study aims to investigate the mutation spectrum of GJB2, mitochondrial 12S rRNA, and SLC26A4 genes of Han Chinese, Hui people, and Uyghur ethnicities in sensorineural hearing loss (SNHL) patients in northwest of China. Mutational analyses in the three genes were brought by direct sequencing and each fragment was analyzed using an ABI 3730 DNA Sequencer. The mutation frequencies for the three HL causative genes were 34.05% in Han Chinese participants, 27.47% in Hui people, and 14.44% in Uyghur participants, respectively. The prevalence of GJB2 mutations was 13.7%, 11.4%, and 11.4% in Han Chinese, Hui people, and Uyghur participants ( , ), respectively. The prevalence of mtDNA 12S rRNA A1555G homozygous mutations was 6.05%, 3.27%, and 1.44% in Han Chinese, Hui people, and Uyghur participants ( , ), respectively. The prevalence of SLC26A4 mutations was 14.3%, 12.8%, and 1.6% in Han Chinese, Hui people, and Uyghur participants, respectively. In summary, we find that Uyghur and Hui SNHL individuals vary significantly from Han Chinese patients in three causative HL genes' mutational spectrum, especially for Uyghur.