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The Transcriptome of Utricle Hair Cell Regeneration in the Avian Inner Ear

ABSTRACT: A comprehensive transcriptome profile of chicken utricle hair cell across a 7 days regenerative time course.

ORGANISM(S): Gallus gallus

PROVIDER: GSE57134 | GEO | 2014/04/29

SECONDARY ACCESSION(S): PRJNA245536

REPOSITORIES: GEO

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The Transcriptome of Utricle Hair Cell Regeneration in the Avian Inner Ear

Project description:A comprehensive transcriptome profile of chicken utricle hair cell across a 7 days regenerative time course. Compare gene expression changes in chicken utricle treated with streptomycin to the control. A total of 60 samples were collected from 11 different time points. Each time point contains at least 2 biological samples.

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The Transcriptome of Basilar Papilla Hair Cell Regeneration in the Avian Inner Ear

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Cell-type identity of the avian utricle

Project description:The avian utricle, a vestibular organ of the inner ear, displays turnover of sensory hair cells throughout life. This is in sharp contrast to the mammalian utricle, which shows limited regenerative capacity. Here, we use single-cell RNA-sequencing to identify distinct marker genes for the different sensory hair cell subtypes of the chicken utricle, which we validated in situ . We provide markers for spatially distinct supporting cell populations, and identified two transitional cell populations of dedifferentiating supporting cells and developing hair cells. Trajectory reconstruction resulted in an inventory of gene expression dynamics of natural hair cell generation in the avian utricle.

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Project description:The mammalian cochlea loses its ability to regenerate new hair cells prior to the onset of hearing. In contrast, the adult vestibular system can produce new hair cells in response to damage, or by reprogramming of supporting cells with the hair cell transcription factor Atoh1. We used RNA-seq and ATAC-seq to probe the transcriptional and epigenetic responses of utricle supporting cells to damage and Atoh1 transduction. We show that the improved regenerative response of the utricle correlates with a more accessible chromatin structure in utricle supporting cells compared to their cochlear counterparts. We also provide evidence that Atoh1 transduction of supporting cells is able to promote increased transcriptional accessibility of some hair cell genes. Our study offers a possible explanation for regenerative differences between sensory organs of the inner ear, but shows that additional factors to Atoh1 may be required for optimal reprogramming of hair cell fate.

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