Enhancer decommissioning imposes an epigenetic barrier to sensory hair cell regeneration.
Animals
Basic Helix-Loop-Helix Transcription Factors
/ metabolism
Cell Differentiation
/ physiology
Cell Transdifferentiation
/ genetics
Epigenesis, Genetic
/ genetics
Hair Cells, Auditory
/ cytology
Mice, Transgenic
Receptors, Notch
/ metabolism
Regeneration
/ physiology
Regulatory Sequences, Nucleic Acid
/ genetics
ATOH1 targetome
H3K4me1
enhancer decommissioning
epigenetics
inner ear
maturation
regeneration
sensory hair cell
transdifferentiation potential
Journal
Developmental cell
ISSN: 1878-1551
Titre abrégé: Dev Cell
Pays: United States
ID NLM: 101120028
Informations de publication
Date de publication:
13 09 2021
13 09 2021
Historique:
received:
16
03
2021
revised:
24
06
2021
accepted:
08
07
2021
pubmed:
1
8
2021
medline:
27
11
2021
entrez:
31
7
2021
Statut:
ppublish
Résumé
Adult mammalian tissues such as heart, brain, retina, and the sensory structures of the inner ear do not effectively regenerate, although a latent capacity for regeneration exists at embryonic and perinatal times. We explored the epigenetic basis for this latent regenerative potential in the mouse inner ear and its rapid loss during maturation. In perinatal supporting cells, whose fate is maintained by Notch-mediated lateral inhibition, the hair cell enhancer network is epigenetically primed (H3K4me1) but silenced (active H3K27 de-acetylation and trimethylation). Blocking Notch signaling during the perinatal period of plasticity rapidly eliminates epigenetic silencing and allows supporting cells to transdifferentiate into hair cells. Importantly, H3K4me1 priming of the hair cell enhancers in supporting cells is removed during the first post-natal week, coinciding with the loss of transdifferentiation potential. We hypothesize that enhancer decommissioning during cochlear maturation contributes to the failure of hair cell regeneration in the mature organ of Corti.
Identifiants
pubmed: 34331868
pii: S1534-5807(21)00559-1
doi: 10.1016/j.devcel.2021.07.003
pmc: PMC8650127
mid: NIHMS1730090
pii:
doi:
Substances chimiques
Basic Helix-Loop-Helix Transcription Factors
0
Receptors, Notch
0
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
2471-2485.e5Subventions
Organisme : NIDCD NIH HHS
ID : F31 DC017376
Pays : United States
Organisme : NIDCD NIH HHS
ID : R01 DC014832
Pays : United States
Organisme : NIDCD NIH HHS
ID : R01 DC015829
Pays : United States
Organisme : NIDCD NIH HHS
ID : T32 DC009975
Pays : United States
Commentaires et corrections
Type : CommentIn
Informations de copyright
Copyright © 2021 Elsevier Inc. All rights reserved.
Déclaration de conflit d'intérêts
Declaration of interests The authors declare no competing interests.
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