Autosomal Recessive Congenital Sensorineural Hearing Loss due to a Novel Compound Heterozygous PTPRQ Mutation in a Chinese Family

Neural Plast. 2018 Apr 19:2018:9425725. doi: 10.1155/2018/9425725. eCollection 2018.

Abstract

PTPRQ gene, encoding protein tyrosine phosphatase receptor Q, is essential for the normal maturation and function of hair bundle in the cochlea. Its mutations can cause the defects of stereocilia in hair cell, which lead to nonsyndromic sensorineural hearing loss. Using next-generation sequencing and Sanger sequencing method, we identified a novel compound heterozygous missense mutation, c.4472C>T p.T1491M (maternal allele) and c.1973T>C p.V658A (paternal allele), in PTPRQ gene. The two mutations are the first reported to be the cause of recessively inherited sensorineural hearing loss. Hearing loss levels and progression involved by PTPRQ mutations among the existing cases seem to be varied, and the relationship between genotypes and phenotypes is unclear. Our data here further prove the important role of PTPRQ in auditory function and provide more information for the further mechanism research of PTPRQ-related hearing loss.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Asian People / genetics
  • Child, Preschool
  • China
  • Female
  • Genes, Recessive
  • Genetic Predisposition to Disease*
  • Hearing Loss, Sensorineural / congenital
  • Hearing Loss, Sensorineural / genetics*
  • Heterozygote
  • Humans
  • Mutant Proteins / chemistry
  • Mutation, Missense*
  • Pedigree
  • Protein Structure, Tertiary
  • Receptor-Like Protein Tyrosine Phosphatases, Class 3 / chemistry
  • Receptor-Like Protein Tyrosine Phosphatases, Class 3 / genetics*

Substances

  • Mutant Proteins
  • PTPRQ protein, human
  • Receptor-Like Protein Tyrosine Phosphatases, Class 3