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Elkan-Miller, T.* ; Ulitsky, I.* ; Hertzano, R.* ; Rudnicki, A.* ; Dror, A.A.* ; Lenz, D.R.* ; Elkon, R.* ; Irmler, M. ; Beckers, J. ; Shamir, R.* ; Avraham, K.B.

Integration of transcriptomics, proteomics, and microRNA analyses reveals novel microRNA regulation of targets in the mammalian inner ear.

PLoS ONE 6:e18195 (2011)
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Open Access Gold
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We have employed a novel approach for the identification of functionally important microRNA (miRNA)-target interactions, integrating miRNA, transcriptome and proteome profiles and advanced in silico analysis using the FAME algorithm. Since miRNAs play a crucial role in the inner ear, demonstrated by the discovery of mutations in a miRNA leading to human and mouse deafness, we applied this approach to microdissected auditory and vestibular sensory epithelia. We detected the expression of 157 miRNAs in the inner ear sensory epithelia, with 53 miRNAs differentially expressed between the cochlea and vestibule. Functionally important miRNAs were determined by searching for enriched or depleted targets in the transcript and protein datasets with an expression consistent with the dogma of miRNA regulation. Importantly, quite a few of the targets were detected only in the protein datasets, attributable to regulation by translational suppression. We identified and experimentally validated the regulation of PSIP1-P75, a transcriptional co-activator previously unknown in the inner ear, by miR-135b, in vestibular hair cells. Our findings suggest that miR-135b serves as a cellular effector, involved in regulating some of the differences between the cochlear and vestibular hair cells.
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Publication type Article: Journal article
Document type Scientific Article
Keywords growth-factor ledgf/p75; progressive hearing-loss; gene-expression; sensory epithelia; cancer cells; hair-cells; mouse; identification; activation; mutations
ISSN (print) / ISBN 1932-6203
Journal PLoS ONE
Quellenangaben Volume: 6, Issue: 4, Pages: , Article Number: e18195 Supplement: ,
Publisher Public Library of Science (PLoS)
Publishing Place Lawrence, Kan.
Reviewing status Peer reviewed