Journal
CLINICAL GENETICS
Volume 98, Issue 6, Pages 548-554Publisher
WILEY
DOI: 10.1111/cge.13839
Keywords
hearing loss; next-generation sequencing; nonGJB2patients; non-syndromic hearing loss
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Funding
- Ministry of Health of the Czech Republic [AZV 16-31173A, DRO 00064203]
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Non-syndromic autosomal recessive hearing loss is an extremely heterogeneous disease caused by mutations in more than 80 genes. We examined Czech patients with early/prelingual non-syndromic, presumably genetic hearing loss (NSHL) without known cause afterGJB2gene testing. Four hundred and twenty-one unrelated patients were examined forSTRCgene deletions with quantitative comparative fluorescent PCR (QCF PCR), 197 unrelated patients with next-generation sequencing by custom-designed NSHL gene panels and 19 patients with whole-exome sequencing (WES). Combining all methods, we discovered the cause of the disease in 54 patients. The most frequent type of NSHL was DFNB16 (STRC), which was detected in 22 patients, almost half of the clarified patients. Other biallelic pathogenic mutations were detected in the genes:MYO15A, LOXHD1, TMPRSS3(each gene was responsible for five clarified patients,CDH23(four clarified patients),OTOGandOTOF(each gene was responsible for two clarified patients). Other genes (AIFM1, CABP2, DIAPH1, PTPRQ, RDX, SLC26A4, TBC1D24, TECTA, TMC1) that explained the cause of hearing impairment were further detected in only one patient for each gene.STRCgene mutations, mainly deletions remain the most frequent NSHL cause after mutations in theGJB2.
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