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Identification of Novel PTPRQ and MYO1A Mutations in An Iranian Pedigree with Autosomal Recessive Hearing Loss.
Cell Journal 2018 April
Autosomal recessive non-syndromic hearing loss (ARNSHL) is defined as a genetically heterogeneous disorder. The aim of the present study was to screen for pathogenic variants in an Iranian pedigree with ARNSHL. Next-generation targeted sequencing of 127 deafness genes in the proband detected two novel variants, a homozygous missense variant in PTPRQ (c.2599 T>C, p.Ser867Pro and a heterozygous missense variant in MYO1A (c.2804 T>C, p.Ile935Thr), both of which were absent in unaffected sibs and two hundred unaffected controls. Our results suggest that the homozygous PTPRQ variant maybe the pathogenic variant for ARNSHL due to the recessive nature of the disorder. Nevertheless, the heterozygous MYO1A may also be involved in this disorder due to the multigenic pattern of ARNSHL. Our data extend the mutation spectrum of PTPRQ and MYO1A, and have important implications for genetic counseling in unaffected sibs of this family. In addition, PTPRQ and MYO1A pathogenic variants have not to date been reported in the Iranian population.
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