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E-GEOD-58296

ABSTRACT: Expression data from intestinal organoids altered for Tgfbeta signaling

PROVIDER: E-GEOD-58296 | ExpressionAtlas | 2014-07-03

REPOSITORIES: ExpressionAtlas

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			Action	DRS
	E-GEOD-58296-analysis-methods.tsv	Tabular
	E-GEOD-58296-atlasExperimentSummary.Rdata	Rdata
	E-GEOD-58296-configuration.xml	Xml
	E-GEOD-58296-percentile-ranks.tsv	Tabular
	E-GEOD-58296.condensed-sdrf.tsv	Tabular

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Human small intestinal organoids grown with a specific protocol to enrich for Paneth cells were treated with an inhbitor (GSK-LSD1) for the epigenetic modulator LSD1.

Project description:To assess the role of LSD1 in human intestinal epithelium, human small intestinal organoids were treated with an inhibitor for LSD1 (GSK-LSD1) and compared to untreated organoids. The organoids were grown with specific conditions where Paneth cells are present in the organoids as similar experiments in mice show that Paneth cells disappear upon GSK-LSD1 treatment. Similar to mouse intestinal organoids, Paneth cells dissappear upon GSK-LSD1 treatment. Furthermore, we used these gene set enrichment analysis on these microarray data to show that these human intestinal organoids have a similar phenotype as mice epithelium without LSD1.

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RNA-seq of small intestinal organoids treated with an inhibitor for the epigenetic modifier LSD1

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Non-neuronal acetylcholine as an endogenous regulator of proliferation and differentiation of Lgr5-positive stem cells in mice

Project description:Acetylcholine (ACh) has been considered a neurotransmitter residing in central, parasympathetic and neuromuscular synapses of mammals. Here, experiments using crypt-villus organoids that lack nerve and immune cells in culture led us to suggest that endogenous ACh is synthesized in the intestinal epithelium to evoke growth and differentiation of the organoids through activation of muscarinic ACh receptors (mAChRs). The extracts of the cultured organoids exhibit a noticeable capacity for ACh synthesis that is sensitive to a potent inhibitor of choline acetyltransferase (ChAT). Imaging mass spectrometry reveals distribution of endogenous ACh that is localized in intestinal epithelial layer in the cultured organoids as well as in mouse small intestinal epithelium in vivo, suggesting non-neural resources of ACh. Treatment of organoids with carbachol down-regulates growth of organoids and expression of marker gene for each epithelial cell. On the other hand, antagonists for mAChRs enhances growth and differentiation of organoids, indicating involvement of mAChRs in regulating proliferation and differentiation of Lgr5-positive stem cells. Collectively, our data provide evidence that endogenous ACh released from intestinal epithelium maintains homeostasis of intestinal epithelial cell growth and differentiation via mAChRs in mice. Gene expression patters of gut, crypt, y-organoid and o-organoid, respectively

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