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• W2034654482 endingPage "e11661" @default.
• W2034654482 startingPage "e11661" @default.
• W2034654482 abstract "At least five bHLH genes regulate cell fate determination and differentiation of sensory neurons, hair cells and supporting cells in the mammalian inner ear. Cross-regulation of Atoh1 and Neurog1 results in hair cell changes in Neurog1 null mice although the nature and mechanism of the cross-regulation has not yet been determined. Neurod1, regulated by both Neurog1 and Atoh1, could be the mediator of this cross-regulation.We used Tg(Pax2-Cre) to conditionally delete Neurod1 in the inner ear. Our data demonstrate for the first time that the absence of Neurod1 results in formation of hair cells within the inner ear sensory ganglia. Three cell types, neural crest derived Schwann cells and mesenchyme derived fibroblasts (neither expresses Neurod1) and inner ear derived neurons (which express Neurod1) constitute inner ear ganglia. The most parsimonious explanation is that Neurod1 suppresses the alternative fate of sensory neurons to develop as hair cells. In the absence of Neurod1, Atoh1 is expressed and differentiates cells within the ganglion into hair cells. We followed up on this effect in ganglia by demonstrating that Neurod1 also regulates differentiation of subtypes of hair cells in the organ of Corti. We show that in Neurod1 conditional null mice there is a premature expression of several genes in the apex of the developing cochlea and outer hair cells are transformed into inner hair cells.Our data suggest that the long noted cross-regulation of Atoh1 expression by Neurog1 might actually be mediated in large part by Neurod1. We suggest that Neurod1 is regulated by both Neurog1 and Atoh1 and provides a negative feedback for either gene. Through this and other feedback, Neurod1 suppresses alternate fates of neurons to differentiate as hair cells and regulates hair cell subtypes." @default.
• W2034654482 created "2016-06-24" @default.
• W2034654482 creator A5030965981 @default.
• W2034654482 creator A5050109541 @default.
• W2034654482 creator A5055075998 @default.
• W2034654482 creator A5067816966 @default.
• W2034654482 date "2010-07-22" @default.
• W2034654482 modified "2023-09-29" @default.
• W2034654482 title "Neurod1 Suppresses Hair Cell Differentiation in Ear Ganglia and Regulates Hair Cell Subtype Development in the Cochlea" @default.
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• W2034654482 doi "https://doi.org/10.1371/journal.pone.0011661" @default.
• W2034654482 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2908541" @default.
• W2034654482 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/20661473" @default.
• W2034654482 hasPublicationYear "2010" @default.
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