Identification of homozygous missense variant in SIX5 gene underlying recessive nonsyndromic hearing impairment.

Hearing impairment (HI) is a heterogeneous condition that affects many individuals globally with different age groups. HI is a genetically and phenotypically heterogeneous disorder. Over the last several years, many genes/loci causing rare autosomal recessive and dominant forms of hearing impairment...

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Main Authors: Mohib Ullah Kakar, Muhammad Akram, Muhammad Zubair Mehboob, Muhammad Younus, Muhammad Bilal, Ahmed Waqas, Amina Nazir, Muhammad Shafi, Muhammad Umair, Sajjad Ahmad, Misbahuddin M Rafeeq
Format: Article
Language:English
Published: Public Library of Science (PLoS) 2022-01-01
Series:PLoS ONE
Online Access:https://doi.org/10.1371/journal.pone.0268078
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author Mohib Ullah Kakar
Muhammad Akram
Muhammad Zubair Mehboob
Muhammad Younus
Muhammad Bilal
Ahmed Waqas
Amina Nazir
Muhammad Shafi
Muhammad Umair
Sajjad Ahmad
Misbahuddin M Rafeeq
author_facet Mohib Ullah Kakar
Muhammad Akram
Muhammad Zubair Mehboob
Muhammad Younus
Muhammad Bilal
Ahmed Waqas
Amina Nazir
Muhammad Shafi
Muhammad Umair
Sajjad Ahmad
Misbahuddin M Rafeeq
author_sort Mohib Ullah Kakar
collection DOAJ
description Hearing impairment (HI) is a heterogeneous condition that affects many individuals globally with different age groups. HI is a genetically and phenotypically heterogeneous disorder. Over the last several years, many genes/loci causing rare autosomal recessive and dominant forms of hearing impairments have been identified, involved in various aspects of ear development. In the current study, two affected individuals of a consanguineous family exhibiting autosomal recessive nonsyndromic hearing impairment (AR-NSHI) were clinically and genetically characterized. The single affected individual (IV-2) of the family was subjected to whole-exome sequencing (WES) accompanied by traditional Sanger sequencing. Clinical examinations using air conduction audiograms of both the affected individuals showed profound hearing loss across all frequencies. WES revealed a homozygous missense variant (c.44G>C) in the SIX5 gene located on chromosome 19q13.32. We report the first case of autosomal recessive NSHI due to a biallelic missense variant in the SIX5 gene. This report further supports the evidence that the SIX5 variant might cause profound HI and supports its vital role in auditory function. Identification of novel candidate genes might help in application of future gene therapy strategies that may be implemented for NSHI, such as gene replacement using cDNA, gene silencing using RNA interference, and gene editing using the CRISPR/Cas9 system.
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spelling doaj.art-01b8967f764044289e60be4d605f18f22022-12-22T02:29:36ZengPublic Library of Science (PLoS)PLoS ONE1932-62032022-01-01176e026807810.1371/journal.pone.0268078Identification of homozygous missense variant in SIX5 gene underlying recessive nonsyndromic hearing impairment.Mohib Ullah KakarMuhammad AkramMuhammad Zubair MehboobMuhammad YounusMuhammad BilalAhmed WaqasAmina NazirMuhammad ShafiMuhammad UmairSajjad AhmadMisbahuddin M RafeeqHearing impairment (HI) is a heterogeneous condition that affects many individuals globally with different age groups. HI is a genetically and phenotypically heterogeneous disorder. Over the last several years, many genes/loci causing rare autosomal recessive and dominant forms of hearing impairments have been identified, involved in various aspects of ear development. In the current study, two affected individuals of a consanguineous family exhibiting autosomal recessive nonsyndromic hearing impairment (AR-NSHI) were clinically and genetically characterized. The single affected individual (IV-2) of the family was subjected to whole-exome sequencing (WES) accompanied by traditional Sanger sequencing. Clinical examinations using air conduction audiograms of both the affected individuals showed profound hearing loss across all frequencies. WES revealed a homozygous missense variant (c.44G>C) in the SIX5 gene located on chromosome 19q13.32. We report the first case of autosomal recessive NSHI due to a biallelic missense variant in the SIX5 gene. This report further supports the evidence that the SIX5 variant might cause profound HI and supports its vital role in auditory function. Identification of novel candidate genes might help in application of future gene therapy strategies that may be implemented for NSHI, such as gene replacement using cDNA, gene silencing using RNA interference, and gene editing using the CRISPR/Cas9 system.https://doi.org/10.1371/journal.pone.0268078
spellingShingle Mohib Ullah Kakar
Muhammad Akram
Muhammad Zubair Mehboob
Muhammad Younus
Muhammad Bilal
Ahmed Waqas
Amina Nazir
Muhammad Shafi
Muhammad Umair
Sajjad Ahmad
Misbahuddin M Rafeeq
Identification of homozygous missense variant in SIX5 gene underlying recessive nonsyndromic hearing impairment.
PLoS ONE
title Identification of homozygous missense variant in SIX5 gene underlying recessive nonsyndromic hearing impairment.
title_full Identification of homozygous missense variant in SIX5 gene underlying recessive nonsyndromic hearing impairment.
title_fullStr Identification of homozygous missense variant in SIX5 gene underlying recessive nonsyndromic hearing impairment.
title_full_unstemmed Identification of homozygous missense variant in SIX5 gene underlying recessive nonsyndromic hearing impairment.
title_short Identification of homozygous missense variant in SIX5 gene underlying recessive nonsyndromic hearing impairment.
title_sort identification of homozygous missense variant in six5 gene underlying recessive nonsyndromic hearing impairment
url https://doi.org/10.1371/journal.pone.0268078
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