PKHD1L1 is required for stereocilia bundle maintenance, durable hearing function and resilience to noise exposure.

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  • Additional Information
    • Source:
      Publisher: Nature Publishing Group UK Country of Publication: England NLM ID: 101719179 Publication Model: Electronic Cited Medium: Internet ISSN: 2399-3642 (Electronic) Linking ISSN: 23993642 NLM ISO Abbreviation: Commun Biol Subsets: MEDLINE
    • Publication Information:
      Original Publication: London, United Kingdom : Nature Publishing Group UK, [2018]-
    • Subject Terms:
      Hair Cells, Auditory*/metabolism ; Hair Cells, Auditory*/physiology ; Hearing* ; Stereocilia*/metabolism; Animals ; Male ; Mice ; Cochlea/metabolism ; Mice, Inbred C57BL ; Mice, Knockout ; Noise/adverse effects ; Receptors, Cell Surface/metabolism
    • Abstract:
      Polycystic Kidney and Hepatic Disease 1-Like 1 (PKHD1L1) is a human deafness gene, responsible for autosomal recessive deafness-124 (DFNB124). Sensory hair cells of the cochlea are essential for hearing, relying on the mechanosensitive stereocilia bundle at their apical pole for their function. PKHD1L1 is a stereocilia protein required for the formation of the developmentally transient stereocilia surface coat. In this study, we carry out an in depth characterization of PKHD1L1 expression in mice during development and adulthood, analyze hair-cell bundle morphology and hearing function in aging PKHD1L1-deficient mouse lines, and assess their susceptibility to noise damage. Our findings reveal that PKHD1L1-deficient mice display no disruption to bundle cohesion or tectorial membrane attachment-crown formation during development. However, starting from 6 weeks of age, PKHD1L1-deficient mice display missing stereocilia and disruptions to bundle coherence. Both conditional and constitutive PKHD1L1 knockout mice develop high-frequency hearing loss progressing to lower frequencies with age. Furthermore, PKHD1L1-deficient mice are susceptible to permanent hearing loss following moderate acoustic overexposure, which induces only temporary hearing threshold shifts in wild-type mice. These results suggest a role for PKHD1L1 in establishing robust sensory hair bundles during development, necessary for maintaining bundle cohesion and function in response to acoustic trauma and aging.
      (© 2024. The Author(s).)
    • Comments:
      Update of: bioRxiv. 2024 Mar 27:2024.02.29.582786. doi: 10.1101/2024.02.29.582786. (PMID: 38496629)
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    • Grant Information:
      R01DC017166 U.S. Department of Health & Human Services | NIH | National Institute on Deafness and Other Communication Disorders (NIDCD); R01DC020190 U.S. Department of Health & Human Services | NIH | National Institute on Deafness and Other Communication Disorders (NIDCD); DC000038 U.S. Department of Health & Human Services | NIH | National Institute on Deafness and Other Communication Disorders (NIDCD); T32 DC000038 United States DC NIDCD NIH HHS; R01 DC020190 United States DC NIDCD NIH HHS; R01 DC017166 United States DC NIDCD NIH HHS
    • Accession Number:
      0 (Receptors, Cell Surface)
    • Publication Date:
      Date Created: 20241101 Date Completed: 20241101 Latest Revision: 20241106
    • Publication Date:
      20241106
    • Accession Number:
      PMC11527881
    • Accession Number:
      10.1038/s42003-024-07121-5
    • Accession Number:
      39482437