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• W3119673721 endingPage "61" @default.
• W3119673721 startingPage "61" @default.
• W3119673721 abstract "Mutations in the GJB2 gene encoding transmembrane protein connexin 26 (Cx26) are the most common cause for hearing loss worldwide. Cx26 plays a crucial role in the ionic and metabolic homeostasis in the inner ear, indispensable for normal hearing process. Different pathogenic mutations in the GJB2 gene can affect all stages of the Cx26 life cycle and result in nonsyndromic autosomal recessive (DFNB1) or dominant (DFNA3) deafness and syndromes associating hearing loss with skin disorders. This study aims to elucidate the functional consequences of a rare GJB2 variant c.516G>C (p.Trp172Cys) found with high frequency in deaf patients from indigenous populations of Southern Siberia (Russia). The substitution c.516G>C leads to the replacement of tryptophan at a conserved amino acid position 172 with cysteine (p.Trp172Cys) in the second extracellular loop of Cx26 protein. We analyzed the subcellular localization of mutant Cx26-p.Trp172Cys protein by immunocytochemistry and the hemichannels permeability by dye loading assay. The GJB2 knockout HeLa cell line has been generated using CRISPR/Cas9 genome editing tool. Subsequently, the HeLa transgenic cell lines stably expressing different GJB2 variants (wild type and mutations associated with hearing loss) were established based on knockout cells and used for comparative functional analysis. The impaired trafficking of mutant Cx26-p.Trp172Cys protein to the plasma membrane and reduced hemichannels permeability support the pathogenic effect of the c.516G>C (p.Trp172Cys) variant and its association with nonsyndromic hearing loss. Our data contribute to a better understanding of the role of mutations in the second extracellular loop of Cx26 protein in pathogenesis of deafness." @default.
• W3119673721 created "2021-01-18" @default.
• W3119673721 creator A5019652239 @default.
• W3119673721 creator A5024887220 @default.
• W3119673721 creator A5029171255 @default.
• W3119673721 date "2021-01-05" @default.
• W3119673721 modified "2023-10-16" @default.
• W3119673721 title "Functional Evaluation of a Rare Variant c.516G>C (p.Trp172Cys) in the GJB2 (Connexin 26) Gene Associated with Nonsyndromic Hearing Loss" @default.
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• W3119673721 doi "https://doi.org/10.3390/biom11010061" @default.
• W3119673721 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7824951" @default.
• W3119673721 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33466560" @default.
• W3119673721 hasPublicationYear "2021" @default.
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