Transcriptomics

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Temporal profiling of gene expression in cochleae of wild type and alpha9 null mice


ABSTRACT: Efferent inhibition of cochlear outer hair cells is mediated by nicotinic cholinergic receptors containing alpha9 (a9) and alpha10 subunits. Mice lacking a9 nicotinic subunits fail to exhibit classic olivocochlear responses and are characterized by abnormal synaptic morphology at the base of outer hair cells. To detail molecular changes induced upon the loss of a9 subunit, we sampled cochlear RNA from wild type and a9 null mice at postnatal (P) days spanning periods of synapse formation and maturation (P3, P7, P13 and P60). Our findings point to a delay in cochlear maturation starting at the onset of hearing (P13), as well as an up-regulation of various GABA receptor subunits in adult mice lacking the a9 nicotinic subunit.

ORGANISM(S): Mus musculus

PROVIDER: GSE18567 | GEO | 2010/03/01

SECONDARY ACCESSION(S): PRJNA120263

REPOSITORIES: GEO

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