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Cell cycle reactivation of cochlear progenitor cells in neonatal FUCCI mice by a GSK3 small molecule inhibitor

Roccio, Marta
Hahnewald, Stefan
Perny, Michael
Published in Scientific reports. 2015, vol. 5, no. 1, 17886
Abstract Due to the lack of regenerative capacity of the mammalian auditory epithelium, sensory hair cell loss results in permanent hearing deficit. Nevertheless, a population of tissue resident stem/progenitor cells has been recently described. Identification of methods to trigger their activity could lead to exploitation of their potential therapeutically. Here we validate the use of transgenic mice reporting cell cycle progression (FUCCI), and stemness (Lgr5-GFP), as a valuable tool to identify regulators of cell cycle re-entry of supporting cells within the auditory epithelium. The small molecule compound CHIR99021 was used to inhibit GSK3 activity. This led to a significant increase in the fraction of proliferating sphere-forming cells, labeled by the FUCCI markers and in the percentage of Lgr5-GFP + cells, as well as a selective increase in the fraction of S-G2-M cells in the Lgr5 + population. Using whole mount cultures of the organ of Corti we detected a statistically significant increment in the fraction of proliferating Sox2 supporting cells after CHIR99021 treatment, but only rarely appearance of novel MyoVIIa +/Edu + hair cells. In conclusion, these tools provide a robust mean to identify novel regulators of auditory organ regeneration and to clarify the contribution of stem cell activity.
Keywords Adult stem cellsStem-cell research
PMID: 26643939
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Research group Groupe Pascal Senn (954)
European Commission: OTOSTEM
European Commission: NANOCI
(ISO format)
ROCCIO, Marta et al. Cell cycle reactivation of cochlear progenitor cells in neonatal FUCCI mice by a GSK3 small molecule inhibitor. In: Scientific Reports, 2015, vol. 5, n° 1, p. 17886. doi: 10.1038/srep17886 https://archive-ouverte.unige.ch/unige:100262

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Deposited on : 2017-12-13

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