Abstract：
:We report the underlying genetic causes of prelingual hearing loss (HL) segregating in eight large consanguineous families, ascertained from the Punjab province of Pakistan. Exome sequencing followed by segregation analysis revealed seven potentially pathogenic variants, including four novel alleles c.257G>A, c.6083A>C, c.89A>G, and c.1249A>G of CLPP, CDH23, COL4A5, and LARS2, respectively. We also identified three previously reported HL-causing variants (c.4528C>T, c.35delG, and c.1219T>C) of MYO15A, GJB2, and TMPRSS3 segregating in four families. All identified variants were either absent or had very low frequencies in the control databases. Our in silico analyses and 3-dimensional (3D) molecular modeling support the deleterious impact of these variants on the encoded proteins. Variants identified in MYO15A, GJB2, TMPRSS3, and CDH23 were classified as "pathogenic" or "likely pathogenic", while the variants in CLPP and LARS2 fall in the category of "uncertain significance" based on the American College of Medical Genetics and Genomics/Association for Molecular Pathology (ACMG/AMP) variant pathogenicity guidelines. This paper highlights the genetic diversity of hearing disorders in the Pakistani population and reports the identification of four novel mutations in four HL families.
journal_name
Genes (Basel)journal_title
Genesauthors
Zafar S,Shahzad M,Ishaq R,Yousaf A,Shaikh RS,Akram J,Ahmed ZM,Riazuddin Sdoi
10.3390/genes11090978subject
Has Abstractpub_date
2020-08-22 00:00:00issue
9issn
2073-4425pii
genes11090978journal_volume
11pub_type
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