Open AccessFurther evidence of involvement of TMEM132E in autosomal recessive nonsyndromic hearing impairment
Author(s) -
Khurram Liaqat,
Shabir Hussain,
Muhammad Bilal,
Abdul Nasır,
Anushree Acharya,
Raheel Ali,
Shoaib Nawaz,
Muhammad Umair,
Isabelle Schrauwen,
Wasim Ahmad,
Suzanne M. Leal
Publication year - 2019
Publication title -
journal of human genetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.055
H-Index - 82
eISSN - 1435-232X
pISSN - 1434-5161
DOI - 10.1038/s10038-019-0691-4
Subject(s) - sanger sequencing , exome sequencing , genetics , missense mutation , biology , gene , hearing loss , exome , mutation , medicine , audiology
Autosomal-recessive (AR) nonsyndromic hearing impairment (NSHI) displays a high degree of genetic heterogeneity with >100 genes identified. Recently, TMEM132E, which is highly expressed in inner hair cells, was suggested as a novel ARNSHI gene for DFNB99. A missense variant c.1259G>A: p.(Arg420Gln) in TMEM132E was identified that segregated with ARNSHI in a single Chinese family with two affected members. In the present study, a family of Pakistani origin with prelingual profound sensorineural hearing impairment displaying AR mode of inheritance was investigated via exome and Sanger sequencing. Compound heterozygous variants c.382G>T: p.(Ala128Ser) and c.2204C>T: p.(Pro735Leu) in TMEM132E were observed in affected but not in unaffected family members. TMEM132E variants identified in this and the previously reported ARNSHI family are located in the extracellular domain. In conclusion, we present a second ARNSHI family with TMEM132E variants which strengthens the evidence of the involvement of this gene in the etiology of ARNSHI.