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Article

A novel compound heterozygous mutation of SLC26A4 in two Chinese families with nonsyndromic hearing loss and enlarged vestibular aqueducts

  • Authors:
    • Guang‑Jie Zhu
    • Lu‑Sen Shi
    • Han Zhou
    • Ye Yang
    • Jie Chen
    • Xia Gao
  • View Affiliations / Copyright

    Affiliations: Department of Otorhinolaryngology, Head and Neck Surgery, Drum Tower Hospital Affiliated to Nanjing University Medical School, Nanjing, Jiangsu 210008, P.R. China
  • Pages: 9011-9016
    |
    Published online on: October 2, 2017
       https://doi.org/10.3892/mmr.2017.7690
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Abstract

Enlarged vestibular aqueduct (EVA)‑associated hearing loss is frequently detected in individuals carrying the SLC26A4 mutation in the Chinese population. The present study aimed to identify the causative SLC26A4 coding mutations in a patient group with nonsyndromic hearing loss (NSHL) and EVA. Genomic DNA was extracted from blood samples obtained from 52 NSHL patients with EVA and from 60 normal controls. The mutation analysis for 20 coding exons of SLC26A4 was performed by direct sequencing. The results of the mutational analysis showed that there were two probands from two separate families suffering from bilateral sensorineural hearing loss with EVA, carrying the same novel compound heterozygous mutation of SLC26A4 (c.1644_1645insA and c.2168A>G). Other members of the two families had heterozygous mono‑allelic mutations with normal hearing. However, neither of these mutations were detected in the 60 normal controls. These results are the first, to the best of our knowledge, to link the compound heterozygote mutation, c.1644_1645insA and c.2168A>G, in the SLC26A4 gene to NSHL patients with EVA. The two mutations identified in the present study were located in the anti‑sigma factor antagonist domain, the core region for plasma membrane targeting of anion transporters, which suggested that the reduced or complete loss of SLC26A4 function was the direct cause of hearing loss in the two patients. These results provide a foundation for further elucidating the genetic factors responsible for EVA‑associated NSHL.
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Copy and paste a formatted citation
Spandidos Publications style
Zhu GJ, Shi LS, Zhou H, Yang Y, Chen J and Gao X: A novel compound heterozygous mutation of SLC26A4 in two Chinese families with nonsyndromic hearing loss and enlarged vestibular aqueducts. Mol Med Rep 16: 9011-9016, 2017.
APA
Zhu, G., Shi, L., Zhou, H., Yang, Y., Chen, J., & Gao, X. (2017). A novel compound heterozygous mutation of SLC26A4 in two Chinese families with nonsyndromic hearing loss and enlarged vestibular aqueducts. Molecular Medicine Reports, 16, 9011-9016. https://doi.org/10.3892/mmr.2017.7690
MLA
Zhu, G., Shi, L., Zhou, H., Yang, Y., Chen, J., Gao, X."A novel compound heterozygous mutation of SLC26A4 in two Chinese families with nonsyndromic hearing loss and enlarged vestibular aqueducts". Molecular Medicine Reports 16.6 (2017): 9011-9016.
Chicago
Zhu, G., Shi, L., Zhou, H., Yang, Y., Chen, J., Gao, X."A novel compound heterozygous mutation of SLC26A4 in two Chinese families with nonsyndromic hearing loss and enlarged vestibular aqueducts". Molecular Medicine Reports 16, no. 6 (2017): 9011-9016. https://doi.org/10.3892/mmr.2017.7690
Copy and paste a formatted citation
x
Spandidos Publications style
Zhu GJ, Shi LS, Zhou H, Yang Y, Chen J and Gao X: A novel compound heterozygous mutation of SLC26A4 in two Chinese families with nonsyndromic hearing loss and enlarged vestibular aqueducts. Mol Med Rep 16: 9011-9016, 2017.
APA
Zhu, G., Shi, L., Zhou, H., Yang, Y., Chen, J., & Gao, X. (2017). A novel compound heterozygous mutation of SLC26A4 in two Chinese families with nonsyndromic hearing loss and enlarged vestibular aqueducts. Molecular Medicine Reports, 16, 9011-9016. https://doi.org/10.3892/mmr.2017.7690
MLA
Zhu, G., Shi, L., Zhou, H., Yang, Y., Chen, J., Gao, X."A novel compound heterozygous mutation of SLC26A4 in two Chinese families with nonsyndromic hearing loss and enlarged vestibular aqueducts". Molecular Medicine Reports 16.6 (2017): 9011-9016.
Chicago
Zhu, G., Shi, L., Zhou, H., Yang, Y., Chen, J., Gao, X."A novel compound heterozygous mutation of SLC26A4 in two Chinese families with nonsyndromic hearing loss and enlarged vestibular aqueducts". Molecular Medicine Reports 16, no. 6 (2017): 9011-9016. https://doi.org/10.3892/mmr.2017.7690
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