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Autosomal dominant non-syndromic hearing loss caused by a novel mutation in MYO7A: A case report and review of the literature.
Xia, Cai-Feng; Yan, Rong; Su, Wen-Wen; Liu, Yu-He.
Afiliação
  • Xia CF; Department of Otolaryngology Head and Neck Surgery, Peking University First Hospital, Beijing 100034, China.
  • Yan R; Department of Otolaryngology Head and Neck Surgery, Peking University First Hospital, Beijing 100034, China.
  • Su WW; Department of Otolaryngology Head and Neck Surgery, Peking University First Hospital, Beijing 100034, China.
  • Liu YH; Department of Otolaryngology Head and Neck Surgery, Peking University First Hospital, Beijing 100034, China.
World J Clin Cases ; 11(25): 5962-5969, 2023 Sep 06.
Article em En | MEDLINE | ID: mdl-37727480
ABSTRACT

BACKGROUND:

Variants in the MYO7A gene commonly result in Usher syndrome, and in rare cases lead to autosomal dominant non-syndromic deafness (DFNA11). Currently, only nine variants have been reported to be responsible for DFNA11 and their clinical phenotypes are not identical. Here we present a novel variant causing DFNA11 identified in a three-generation Chinese family. CASE

SUMMARY:

The proband was a 53-year-old Han male who presented with post-lingual bilateral symmetrical moderate sensorineural hearing loss. We learned from the patient's medical history collection that multiple family members also had similar hearing loss, generally occurring around the age of 40. Subsequent investigation by high-throughput sequencing identified a novel MYO7A variant. To provide evidence supporting that this variant is responsible for the hearing loss in the studied family, we performed Sanger sequencing on 11 family members and found that the variant co-segregated with the deafness phenotype. In addition, the clinical manifestation of the 11 affected family members was found to be late-onset bilateral slowly progressive hearing loss, inherited in this family in an autosomal dominant manner. None of the affected family members had visual impairment or vestibular symptoms; therefore, we believe that this novel MYO7A variant is responsible for the rare DFNA11 in this family.

CONCLUSION:

We report a novel variant leading to DFNA11 which further enriches the collection of MYO7A variants, and our review of the nine previous variants that have been identified to cause DFNA11 provides a reference for clinical genetic counseling.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Prognostic_studies Idioma: En Revista: World J Clin Cases Ano de publicação: 2023 Tipo de documento: Article País de afiliação: China

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Prognostic_studies Idioma: En Revista: World J Clin Cases Ano de publicação: 2023 Tipo de documento: Article País de afiliação: China