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Learn MoreInjury induces retinal Muller glia of non-mammalian, but not mammalian, vertebrates to generate neurons. To identify gene regulatory networks that control neurogenic competence in retinal glia, we used bulk and single-cell RNA-seq and ATAC-seq analysis to comprehensively profile gene expression and chromatin conformation in Muller glia from zebrafish, chick and mice. This was conducted during glial development, following inner and outer retinal injury, as well as following treatment with extrinsic factors that induce glial reprogramming. Integration of these data, together with functional analysis of candidate genes, identified evolutionarily conserved and species-specific gene regulatory networks controlling glial quiescence, gliosis, and neurogenic competence. In zebrafish and chick, transition from quiescence to gliosis is a necessary stage in acquisition of neurogenic competence, while in mice a dedicated network suppresses this transition and rapidly restores quiescence. These findings may help guide the design of cell-based therapies aimed at restoring retinal neurons lost to disease. SOURCE: Jie Wang (jwang240@jhmi.edu) - Johns Hopkins University
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