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Chromatin Landscape Analysis of Wild Type and HHEX-/- ES-derived Pancreatic Progentiors

ABSTRACT: Chromatin Landscape Analysis of Wild Type and HHEX-/- ES-derived Pancreatic Progentiors

PROVIDER: PRJNA751907 | ENA |

REPOSITORIES: ENA

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Transcription Landscape Analysis of Wild Type and HHEX-/- ES-derived Pancreatic Progentiors

Project description:Transcription Landscape Analysis of Wild Type and HHEX-/- ES-derived Pancreatic Progentiors

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Chromatin Landscape Analysis of Wild Type and HHEX-/- ES-derived Pancreatic Progentiors

Project description:The pancreas and liver arise from a common pool of progenitors in the foregut endoderm; however, the underlying molecular mechanisms driving this lineage diversification are not fully understood. We combined human pluripotent stem cell guided differentiation and sequential CRISPR-Cas9 loss-of-function screening to uncover regulators of pancreatic specification. Here we report the discovery of a cell-intrinsic requirement for HHEX, a transcription factor (TF) associated with diabetes susceptibility. HHEX promotes pancreatic differentiation through cooperation with pancreatic TFs as well as common TFs like FOXA2 that are shared by both pancreas and liver differentiation programs. Furthermore, HHEX restricts differentiation plasticity, and deletion of HHEX shifts FOXA2 interaction towards cooperation with HNF4A, driving liver differentiation. Therefore, HHEX safeguards pancreatic differentiation by promoting lineage specification while simultaneously restricting cell fate plasticity, demonstrating how organ domain demarcation requires fine tuning of TF cooperation.

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