Evaluation of a recurrent mutation in HGF gene responsible for non-syndromic hereditary deafness in Kashmiri population

Kalsoom Zaigham, Hamna Tariq, Tanveer Ahmed Qaiser, Saad Bin Maqsood, Asma Ali Khan


Background: Mutations in gene coding for hepatocyte growth factor protein, HGF are responsible for hereditary deafness worldwide. Evaluation of recurrent variations displays prevalent heredity diversity of a specific population. Mutational screening of HGF was aimed to ascertain the causative recurrent variations in Kashmiri families.

Methods: Kashmiri families were enrolled from different divisions of Azad Jammu and Kashmir. By employing linkage analysis all the families were screened for loci common in Pakistani population. Families linked with DFNB39 locus were subjected to direct sequencing for mutational analysis of variants prevalent in Pakistani population.

Results: Sanger sequencing identified a noncoding c.482+1986_1988delTGA variant of HGF as recurrent mutation in Kashmiri population. These findings implicate this HGF variant as major contributing variant of hearing impairment in Kashmiri families with a frequency of 8.8%.

Conclusion: This is the first study conducted to elucidate the founder effect and prevalence of HGF variants in Kashmiri population. This study increases the prevalence of HGF variants associated with hearing impairment in the Kashmiri families.

Keywords: HGF; Autosomal recessive hearing loss; Recurrent mutations; Founder effect

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