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Targeted Exome Sequencing of Deafness Genes After Failure of Auditory Phenotype-Driven Candidate Gene Screening. | LitMetric

Targeted Exome Sequencing of Deafness Genes After Failure of Auditory Phenotype-Driven Candidate Gene Screening.

Otol Neurotol

*Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Hospital, Seoul; †Department of Otorhinolaryngology-Head and Neck Surgery, Dankook University Hospital, Cheonan; ‡Department of Biomedical Sciences, College of Medicine, Seoul National University, Seoul; §Department of Molecular and Cellular Biology, Sungkyunkwan University School of Medicine, Suwon; ∥Samsung Genome Institute, Samsung Medical Center, Seoul; and ¶Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Bundang Hospital, Seongnam, Korea.

Published: July 2015

AI Article Synopsis

  • * Six hearing-impaired individuals from different families, initially deemed non-syndromic, were analyzed using TES, which revealed causative variants in half of the cases.
  • * The results suggest that TES can improve genetic diagnosis for deafness without relying solely on auditory clues, and it also offered additional insights into non-pathogenic genetic variations related to hearing loss.

Article Abstract

Objective: To demonstrate the efficacy and advantages of targeted exome sequencing (TES) of known deafness genes in cases with failed or misleading auditory phenotype-driven candidate gene screening.

Study Design: Prospective cohort survey.

Setting: Otolaryngology department of a tertiary referral hospital.

Patients: Six hearing-impaired probands with seemingly non-syndromic features from six deaf families were enrolled in this study after failure of genetic diagnosis using auditory phenotype-driven candidate gene screening.

Intervention: TES of known deafness genes was performed in the six probands, and a final causative variant was pursued using subsequent filtering steps.

Main Outcome Measure: Potential causative variants determined using TES were confirmed by previously introduced filtering steps.

Results: We detected causative variants in three (50%) of six families, and these variants were in the COCH, PAX3, and GJB2 genes. Additionally, we also recapitulated the recent finding from other report arguing for the non-pathogenic potential of MYO1A variant.

Conclusions: TES of a deafness panel provides a comprehensive genetic screening tool that can be implemented without being misled by the audiogram configuration information and can complement incomplete clinical physical examinations. In addition, the secondary incidental finding obtained by TES contributes useful information regarding the deafness field.

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Source
http://dx.doi.org/10.1097/MAO.0000000000000747DOI Listing

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