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Robust Expansion of Human Pancreatic Progenitors by Small Molecules [ATAC-seq]

ABSTRACT: An unlimited source of functional human pancreatic β cells are in highly demand. Even with recent advances in pancreatic β-like cell differentiation from human pluripotent stem cells (hPSCs), several hurdles obviously remain and the differentiation protocols need to be further improved. Chemical strategies are particularly useful to address these challenges. Here, through chemical screening, we unexpectedly identified that BET bromodomain inhibitor I-BET151 could robustly promote the expansion of PDX1 and NKX6.1 double-positive human pancreatic progenitors (PPs). These hPSC-derived expandable pancreatic progenitors (ePPs) can proliferate extensively in a chemically defined condition with I-BET151. Even after long-term expansion, these ePPs maintain pancreatic progenitor cell status. In addition, ePPs can efficiently differentiate into pancreatic β-like cells (ePP-β cells). These ePP-β cells are functional and demonstrate glucose-stimulation insulin-secretion (GSIS) capacity. Mechanistically, I-BET151 can activate Notch signaling and promote the expression of key pancreatic progenitor-associated genes and transcriptional network. Conclusively, our studies achieve the long-term goal of robust expansion of human pancreatic progenitors and represent a significant step towards unlimited supplies of functional human pancreatic β cells that are of great interest for biomedical research and regenerative medicine.

ORGANISM(S): Homo sapiens

PROVIDER: GSE156711 | GEO | 2022/02/24

REPOSITORIES: GEO

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Robust Expansion of Human Pancreatic Progenitors by Small Molecules [CUT&TAG]

Project description:An unlimited source of functional human pancreatic β cells are in highly demand. Even with recent advances in pancreatic β-like cell differentiation from human pluripotent stem cells (hPSCs), several hurdles obviously remain and the differentiation protocols need to be further improved. Chemical strategies are particularly useful to address these challenges. Here, through chemical screening, we unexpectedly identified that BET bromodomain inhibitor I-BET151 could robustly promote the expansion of PDX1 and NKX6.1 double-positive human pancreatic progenitors (PPs). These hPSC-derived expandable pancreatic progenitors (ePPs) can proliferate extensively in a chemically defined condition with I-BET151. Even after long-term expansion, these ePPs maintain pancreatic progenitor cell status. In addition, ePPs can efficiently differentiate into pancreatic β-like cells (ePP-β cells). These ePP-β cells are functional and demonstrate glucose-stimulation insulin-secretion (GSIS) capacity. Mechanistically, I-BET151 can activate Notch signaling and promote the expression of key pancreatic progenitor-associated genes and transcriptional network. Conclusively, our studies achieve the long-term goal of robust expansion of human pancreatic progenitors and represent a significant step towards unlimited supplies of functional human pancreatic β cells that are of great interest for biomedical research and regenerative medicine.

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2015-04-06 | E-MTAB-3061 | biostudies-arrayexpress

Expression DATA from E11.5 pancreatic buds treated with I-BET151 or JQ1 for 24h

Project description:Bromodomain and Extra-terminal (BET) proteins are epigenetic readers that interact with acetylated lysines of histone tails. Recent studies have demonstrated their role in cancer progression, as they recruit key components of the transcriptional machinery to modulate gene expression. However, their role during embryonic development of the pancreas has never been studied. Using mouse embryonic pancreatic explants and human IPSC, we show that inhibition of BET proteins with either I-BET151 or JQ1 dramatically enhances the number of neurogenin3 (NEUROG3) endocrine progenitors, leading to an increased number of endocrine cells in the pancreatic explants. Despite inducing several β cell markers, BETi also strongly down-regulated Ins1 expression in developed explants and adult β cells. However, removal of BETi from explants prior to β cell development, as NEUROG3 expression peaks, further led to enhanced β cell development with higher expression of insulin and maturation markers UCN3 and MAFA. Altogether, these results show that BET proteins play a major role in the pancreas endocrine differentiation. Furthermore, they highlight the potential use of BETi to improve β cell replacement therapies.

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Project description:Access to an unlimited number of human pancreatic beta cells represents a major challenge in the field of diabetes to better dissect human beta cell functions and to make significant progress in drug discovery and cell replacement therapies. We previously reported the generation of the EndoC-bH1 human beta cell line that was generated by targeted oncogenesis in human fetal pancreases followed by in vivo cell differentiation in mice. Such cell line displayed many functional properties of adult beta cells. Here we devised a novel strategy to generate conditionally immortalized human beta cell lines based on CRE-mediated excision of immortalizing transgenes. The resulting EndoC-bH2 cell line can be massively amplified in vitro. Transgenes are next efficiently excised upon CRE expression leading to cell proliferation arrest and strong enhancement of beta cell specific features such as insulin expression, content and secretion. Excised EndoC-bH2 cells are close to authentic human beta cells and represent a unique tool to further study beta cell function and to understand why adult human beta cells are refractory to proliferation and how to achieve drug-dependent mobilization towards beta cell expansion. Expression profile of human beta cell lineEndoC-bH2 before and after excision of an immortalization cassette (SV40 LT and hTERT) is compared to human exocrine pancreas cell line SKPC and adult human islets from cadaveric donors. Three replicates were used for each sample group. The three adult human islets samples were taken from GEO series GSE40709 (GSM999550, GSM999551 and GSM999552) and normalized with H357 and SKPC cell line samples using RMA.

2014-03-21 | E-GEOD-48101 | biostudies-arrayexpress

A conditionally immortalized human pancreatic beta cell line

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2017-06-06 | E-MTAB-5731 | biostudies-arrayexpress

Transcriptome profiling of human pancreatic cell lineage specification reveals functional signaling pathways and lncRNAs for cell fate determination

Project description:To guide the beta cell differentiation process in vitro, a complete understanding of the transcriptome and their regulatory network during the differentiation process is essential. Using RNA-seq, we have performed the transcriptome profiling of human embryonic stem cells (ESCs), purified ESC-derivate definitive endoderm (DE), pancreatic progenitors (PP), as well as sorted human primary pancreatic alpha cells, beta cells and exocrine cells.

2016-02-20 | E-MTAB-3356 | biostudies-arrayexpress

microRNA and mRNA expression profiles of human pancreatic islet-like cell clusters

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