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• W2784124003 abstract "Abstract Retinal progenitor cells (RPCs) pass through multiple stages of developmental competence, where they successively acquire and lose the ability to generate individual cell subtypes. To identify the transcriptional regulatory networks that control these transitions, we conducted epigenomic and transcriptomic profiling of early and late-stage RPCs and observed a developmentally dynamic landscape of chromatin accessibility. Open chromatin regions that showed stage-specificity, as well as those shared by early and late-stage RPCs, were selectively targeted by the homeodomain factor Lhx2, which is expressed throughout retinal neurogenesis but also regulates many stage-specific processes in RPCs. Stage-specific Lhx2 binding sites were frequently associated with target sites for transcription factors that are preferentially expressed in either early or late-stage RPCs, and which were predicted to possess pioneer activity. Lhx2 loss of function in RPCs led to a loss of chromatin accessibility at both direct Lhx2 target sites and more broadly across the genome, as well as a loss of binding by transcription factors associated with stage-specific Lhx2 target sites. These findings demonstrate a central role for Lhx2 in control of chromatin accessibility in RPCs, and identify transcription factors that may guide stage-specific target site selection by Lhx2. Summary Lhx2 is a central regulator of chromatin accessibility in retinal progenitor cells, and interacts with stage-specific transcription factors to regulate genes that are dynamically expressed during retinal neurogenesis." @default.
• W2784124003 created "2018-01-26" @default.
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• W2784124003 date "2017-12-21" @default.
• W2784124003 modified "2023-10-14" @default.
• W2784124003 title "Lhx2 regulates temporal changes in chromatin accessibility and transcription factor binding in retinal progenitor cells" @default.
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• W2784124003 doi "https://doi.org/10.1101/238279" @default.
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