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- W2950588021 abstract "TRIOBP remodels the cytoskeleton by forming unusually dense F-actin bundles and is implicated in human cancer, schizophrenia, and deafness. Mutations ablating human and mouse TRIOBP-4 and TRIOBP-5 isoforms are associated with profound deafness, as inner ear mechanosensory hair cells degenerate after stereocilia rootlets fail to develop. However, the mechanisms regulating formation of stereocilia rootlets by each TRIOBP isoform remain unknown. Using 3 new Triobp mouse models, we report that TRIOBP-5 is essential for thickening bundles of F-actin in rootlets, establishing their mature dimensions and for stiffening supporting cells of the auditory sensory epithelium. The coiled-coil domains of this isoform are required for reinforcement and maintenance of stereocilia rootlets. A loss of TRIOBP-5 in mouse results in dysmorphic rootlets that are abnormally thin in the cuticular plate but have increased widths and lengths within stereocilia cores, and causes progressive deafness recapitulating the human phenotype. Our study extends the current understanding of TRIOBP isoform–specific functions necessary for life-long hearing, with implications for insight into other TRIOBPopathies." @default.
- W2950588021 created "2019-06-27" @default.
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- W2950588021 date "2019-06-20" @default.
- W2950588021 modified "2023-10-18" @default.
- W2950588021 title "TRIOBP-5 sculpts stereocilia rootlets and stiffens supporting cells enabling hearing" @default.
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- W2950588021 doi "https://doi.org/10.1172/jci.insight.128561" @default.
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