Rescue of auditory function by a single administration of AAV-TMPRSS3 gene therapy in aged mice of human recessive deafness DFNB8

Wan Du, Volkan Ergin, Corena Loeb, Mingqian Huang, Stewart Silver, Ariel Miura Armstrong, Zaohua Huang, Channabasavaiah B. Gurumurthy, Hinrich Staecker, Xuezhong Liu, Zheng Yi Chen

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Patients with mutations in the TMPRSS3 gene suffer from recessive deafness DFNB8/DFNB10. For these patients, cochlear implantation is the only treatment option. Poor cochlear implantation outcomes are seen in some patients. To develop biological treatment for TMPRSS3 patients, we generated a knockin mouse model with a frequent human DFNB8 TMPRSS3 mutation. The Tmprss3A306T/A306T homozygous mice display delayed onset progressive hearing loss similar to human DFNB8 patients. Using AAV2 as a vector to carry a human TMPRSS3 gene, AAV2-hTMPRSS3 injection in the adult knockin mouse inner ear results in TMPRSS3 expression in the hair cells and the spiral ganglion neurons. A single AAV2-hTMPRSS3 injection in Tmprss3A306T/A306T mice of an average age of 18.5 months leads to sustained rescue of the auditory function to a level similar to wild-type mice. AAV2-hTMPRSS3 delivery rescues the hair cells and the spiral ganglions neurons. This study demonstrates successful gene therapy in an aged mouse model of human genetic deafness. It lays the foundation to develop AAV2-hTMPRSS3 gene therapy to treat DFNB8 patients, as a standalone therapy or in combination with cochlear implantation.

Original languageEnglish (US)
Pages (from-to)2796-2810
Number of pages15
JournalMolecular Therapy
Volume31
Issue number9
DOIs
StatePublished - Sep 6 2023

Keywords

  • AAV
  • DFNB10
  • DFNB8
  • TMPRSS3
  • aged mouse
  • gene therapy
  • genetic hearing loss
  • hair cells
  • recessive
  • spiral ganglion neurons

ASJC Scopus subject areas

  • Molecular Medicine
  • Molecular Biology
  • Genetics
  • Pharmacology
  • Drug Discovery

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