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  • Hair Cell Reconstruction
  • Electron Magnet view of hair cell
  • images of cochlea

White Lab

Regeneration After Noise Induced Hearing Loss

Photo of Lab Members

The White Lab

Hearing loss results from prolonged noise exposure. Individual genetics determines each person’s threshold for damage, and by the age of 65 around one third of adults complain of hearing loss. Age-related and noise induced hearing loss are both incurable and progressive, and in many cases are due to the accumulated loss of cochlear mechanosensory hair cells. Sensory hair cells are arrayed in a highly structured epithelial sheet, surrounded by supporting cells with differing shapes and functions. Mammals only generate these specialized cells during fetal development. Once sensory hair cells are lost through over-stimulation, they are never replaced. The adjacent supporting cells expand without cell division to fill the space and create a scar that is insensitive to sound vibrations.

Although there are no signs that deafened mammalian cochleae regenerate, other vertebrates like birds can regain auditory function after damage. This regeneration involves two separable processes:

  • a subset of supporting cells adjacent to the lost sensory hair cells re-enter the cell cycle, replenishing the cell number,
  • partly overlapping subset differentiates into new sensory hair cells.
Photo of Mouse Cochlea

Dissected mouse cochlea with hair cells in red and supporting cells in green. Featured on the cover of Nature.

During my post-doctoral collaborations, we found that purified immature mammalian supporting cells can also divide and differentiate into new sensory hair cells under certain conditions in culture. Moreover, mature mammalian supporting cells can differentiate into sensory hair cells, either in vitro or in response to induction with certain genes. Our findings suggest that sensory hair cell regeneration in mammals may be feasible. Understanding the molecular controls that regulate the processes of regeneration, however, will be key to designing therapies for regenerating sensory hair cells.

Patricia M. White, Ph.D.

Patricia M. White, Ph.D.
Principal Investigator

Publications

    1. Piekna-Przybylska D
    2. Na D
    3. Zhang J
    4. Baker C
    5. Ashton JM
    6. White PM
    Corrigendum: Single cell RNA sequencing analysis of mouse cochlear supporting cell transcriptomes with activated ERBB2 receptor indicates a cell-specific response that promotes CD44 activation.; Frontiers in cellular neuroscience; Vol 18, pp. 1428589. 2024 May 24.
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    8. Hoste E
    9. Joannidis M
    10. Pettilä V
    11. Wang AY
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    13. Wald R
    14. Bagshaw SM
    15. Ostermann M
    16. Bagshaw SM
    17. Wald R
    18. Adhikari NKJ
    19. Bellomo R
    20. Dreyfuss D
    21. Du B
    22. Gallagher MP
    23. Gaudry S
    24. Hoste EA
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    26. Joannidis M
    27. Liu KD
    28. McAuley DF
    29. McGuinness SP
    30. Nichol AD
    31. Ostermann M
    32. Palevsky PM
    33. Qiu H
    34. Pettilä V
    35. Schneider AG
    36. Smith OM
    37. Vaara ST
    38. Weir M
    39. Bellomo R
    40. Eastwood GM
    41. Peck L
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    43. Kruger P
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    50. McGain F
    51. Mulder J
    52. Fennessy G
    53. Koottayi S
    54. Bates S
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    57. Tippett A
    58. Udy A
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    60. Licari E
    61. Gantner D
    62. McClure J
    63. Nichol A
    64. McCracken P
    65. Board J
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    67. Vallance S
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    333. Noel Gibney RT
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    495. Henry-Lagarrigue M
    496. Seguin A
    497. Crosby L
    498. Maizel J
    499. Titeca-Beauport D
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    914. Carson J
    915. White P
    916. Omalay G
    917. Brown S
    918. Velez L
    919. Marceron A
    920. Neyra JA
    921. Carlos Aycinena J
    922. Elias M
    923. Ortiz-Soriano VM
    924. Hauschild C
    925. Dorfman R
    Regional Practice Variation and Outcomes in the Standard Versus Accelerated Initiation of Renal Replacement Therapy in Acute Kidney Injury (STARRT-AKI) Trial: A Post Hoc Secondary Analysis.; Critical care explorations; Vol 6(2), pp. e1053. 2024 Feb 19.
    1. Na D
    2. Zhang J
    3. Beaulac HJ
    4. Piekna-Przybylska D
    5. Nicklas PR
    6. Kiernan AE
    7. White PM
    Corrigendum: Increased central auditory gain in 5xFAD Alzheimer's disease mice as an early biomarker candidate for Alzheimer's disease diagnosis.; Frontiers in neuroscience; Vol 17, pp. 1250244. 2023 Jul 18.
    1. Na D
    2. Zhang J
    3. Beaulac HJ
    4. Piekna-Przybylska D
    5. Nicklas PR
    6. Kiernan AE
    7. White PM
    Increased central auditory gain in 5xFAD Alzheimer's disease mice as an early biomarker candidate for Alzheimer's disease diagnosis.; Frontiers in neuroscience; Vol 17, pp. 1106570. 2023 May 26.

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