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Niche-independent high-purity cultures of Lgr5+ intestinal stem cells and their progeny

ABSTRACT: Although Lgr5+ intestinal stem cells have been expanded in vitro as organoids, homogeneous culture of these cells has not been possible so far. Here we show that two small molecules, CHIR99021 and valproic acid, synergistically maintain self-renewal of mouse Lgr5+ intestinal stem cells, resulting in nearly homogeneous cultures. The colony-forming efficiency of cells from these cultures is ~100-fold greater than that of cells cultured in the absence of CHIR99021 and valproic acid, and multilineage differentiation ability is preserved. We made use of these homogeneous cultures to identify conditions employing simultaneous modulation of Wnt and Notch signaling to direct lineage differentiation into mature enterocytes, goblet cells and Paneth cells. Expansion in these culture conditions may be feasible for Lgr5+ cells from the mouse stomach and colon and from the human small intestine. These methods provide new tools for the study and application of multiple intestinal epithelial cell types.

ORGANISM(S): Mus musculus

PROVIDER: GSE51539 | GEO | 2013/11/22

SECONDARY ACCESSION(S): PRJNA223394

REPOSITORIES: GEO

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Niche-independent high-purity cultures of Lgr5+ intestinal stem cells and their progeny

Project description:Although Lgr5+ intestinal stem cells have been expanded in vitro as organoids, homogeneous culture of these cells has not been possible so far. Here we show that two small molecules, CHIR99021 and valproic acid, synergistically maintain self-renewal of mouse Lgr5+ intestinal stem cells, resulting in nearly homogeneous cultures. The colony-forming efficiency of cells from these cultures is ~100-fold greater than that of cells cultured in the absence of CHIR99021 and valproic acid, and multilineage differentiation ability is preserved. We made use of these homogeneous cultures to identify conditions employing simultaneous modulation of Wnt and Notch signaling to direct lineage differentiation into mature enterocytes, goblet cells and Paneth cells. Expansion in these culture conditions may be feasible for Lgr5+ cells from the mouse stomach and colon and from the human small intestine. These methods provide new tools for the study and application of multiple intestinal epithelial cell types. Total RNA was isolated from two independently established wild-type mouse small intestinal organoid lines after culture for 6 days in control condition or in the presence of CHIR99021, Valproic Acid (VPA) or both compounds. cRNA was labeled with Cy5 and hybridized against Cy3 labeled cRNA from control organoids (as an internal reference) on 4X44K Agilent Whole Mouse Genome dual colour Microarrays (G4122F), resulting in eight individual arrays.

2013-11-22 | E-GEOD-51539 | biostudies-arrayexpress

Niche-Independent Expansion and Controlled Differentiation of Intestinal Stem Cells in vitro

Project description:While stem cells at the bottom of intestinal crypts have been isolated and expanded in vitro in the form of organoids, the self-renewal and differentiation of Lgr5+ stem cells in typical culture conditions cannot be easily controlled. Here we show that two small molecules, CHIR99021 and Valproic Acid, synergistica

2014-04-02 | E-MTAB-1978 | biostudies-arrayexpress

Cell-autonomous transformation of Lgr5-positive intestinal stem cells into gastric stem cells upon loss of transcription factor Cdx2

Project description:Stomach and intestinal adult epithelia harbor stem cells that are responsible for their continuous regeneration. Stomach and intestinal stem cells differ in their differentiation program and in the gene repertoire that they express. We show that single adult Lgr5-positive stem cells, isolated from 3D cultured small intestinal organoids, require Cdx2 to maintain their intestinal identity and are converted cell-autonomously into stomach-pyloric stem cells in the absence of this transcription factor. In order to obtain Cdx2null intestinal stem cells carrying the Lgr5-EGFP marker, 5-6 days old small intestinal organoids generated from Cdx2-/fl/Lgr5-EGFP-Ires-CreERT2 mice were incubated with 1 µM of 4-hydroxytamoxifen in intestinal culture medium for 16h to activate the Cre recombinase. Controls were 4-hydroxytamoxifen-untreated small intestinal (Control SI) and stomach (Control Sto) organoids issued from mice with the same genotype. The organoids were dissociated and sorted for EGFPhi. Cdx2null, Control SI and Control Sto clonal organoids were generated and expanded from Lgr5-EGFPhi single cells in stomach specific culture medium (ENRWfg) and RNA was isolated for RNA-Seq analysis. Cdx2+ Stomach (Sto) organoids were generated by infection of the wild type stomach organoids with lentiviral stock expressing Cdx2. They were cultured in stomach medium (ENRWfg) and RNA was isolated for RNA-Seq analysis

2014-12-05 | E-GEOD-62784 | biostudies-arrayexpress

Unlimited in vitro expansion of adult bi-potent pancreas progenitors through the Lgr5/Rspondin axis

Project description:Lgr5 marks adult stem cells in multiple adult organs and is a receptor for the Wnt-agonistic R-spondins (RSPOs). Intestinal, stomach and liver Lgr5+ stem cells grow in 3D cultures to form ever-expanding organoids, which resemble the tissues of origin. Wnt signaling is inactive and Lgr5 is not expressed under physiological conditions in the adult pancreas. However, we now report that the Wnt pathway is robustly activated upon injury by Partial Duct Ligation (PDL), concomitant with the appearance of Lgr5 expression in regenerating pancreatic ducts. In vitro, duct fragments from mouse pancreas initiate Lgr5 expression in RSPO1-based cultures, and develop into budding cyst-like structures (organoids) which expand 5-fold weekly for >40 weeks. Single isolated duct cells can also be cultured into pancreatic organoids, containing Lgr5 stem/progenitor cells that can be clonally expanded. Clonal pancreas organoids can be induced to differentiate into duct as well as endocrine cells upon transplantation, thus proving their bi-potentiality We generated arrays from whole pancreas, islet, acinar and duct (Sox9+ sorted) cells and pancreas derived cultures maintained in our defined medium. For the clustering analysis we substracted the pancreas array to all arrays. Genes 2 fold differentially expressed in the ductal array were used for the analsyis. For the genes enriched in organoid cultures compared to pancreas we substracted the organoid culture arrays to the pancreas array. Genes >2-fold differentially expressed were used for the analysis.

2013-09-17 | E-GEOD-50103 | biostudies-arrayexpress

Ribosome impairment regulates intestinal stem cell identity via ZAKa activation.

Project description:The small intestine is a rapidly proliferating organ that is maintained by a small population of Lgr5-expressing intestinal stem cells (ISCs). However, several Lgr5-negative ISC populations have been identified, and this remarkable plasticity allows the intestine to rapidly respond to both the local environment and to damage. The mediators of such plasticity are still largely unknown. Using intestinal organoids and mouse models, we show that upon ribosome impairment (driven by Rptor deletion, amino acid starvation, or low dose cyclohexamide treatment) ISCs gain an Lgr5-negative, fetal-like identity. This is accompanied by a rewiring of metabolism. Our findings suggest that the ribosome can act as a sensor of nutrient availability, allowing ISCs to respond to the local nutrient environment. Mechanistically, we show that this phenotype requires the activation of ZAKɑ, which in turn activates YAP, via SRC. Together, our data reveals a central role for ribosome dynamics in intestinal stem cells, and identify the activation of ZAKɑ as a critical mediator of stem cell identity.

2022-06-13 | PXD033122 | Pride

A constant pool of Lgr5+ intestinal stem cells is required for intestinal homeostasis

Project description:Lgr5+ crypt base columnar cells, the operational intestinal stem cells (ISCs), are thought to be dispensable for small intestinal (SI) homeostasis. Using a novel Lgr5-2A-DTR (Diphtheria Toxin Receptor) model which ablates Lgr5+ cells with near-complete efficiency and retains endogenous levels of Lgr5 expression, we show that persistent depletion of Lgr5+ ISCs in fact compromises SI epithelial integrity and reduces epithelial turnover in vivo. In vitro, Lgr5-2A-DTR SI organoids are unable to establish or survive when Lgr5+ ISCs are continuously eliminated when DT is in the media. However, transient exposure to DT at the start of culture allows organoids to form, and the rate of outgrowth reduces with increasing length of DT presence. Our results indicate that intestinal homeostasis requires a constant pool of Lgr5+ ISCs, which is supplied by rapidly reprogrammed non-Lgr5+ crypt populations when pre-existing Lgr5+ ISCs are ablated.

2020-12-31 | GSE148727 | GEO

Early Mouse Hepatic Stellate Cell Activation

Project description:Early during culture of primary mouse HSCs gene expression changes. These expression alterations can be affected by treating cells with histone deacetylase inhibitor, valproic acid Primary mouse Hepatic stellate cells were cultured for short periods of time (4-16-64h) in presence or absence of valproic acid. Gene expression analysis (mouse Gene 1.0 ST arrays according to manufacturerM-bM-^@M-^Ys manual 701880Rev4 (Affymetrix, Santa Clara, CA)), in vitro stellate cell activation and inhibition of the activation by valproic acid treatment.

2014-01-01 | E-GEOD-51882 | biostudies-arrayexpress

Early Mouse Hepatic Stellate Cell Activation

2014-01-01 | GSE51882 | GEO

RNA-seq of mouse Lgr5+ intestinal stem cells and progenitors following Lkb1 deletion against controls

Project description:Perturbed intestinal epithelial homeostasis demonstrated as decreased Lgr5+ intestinal stem cells (Lgr5 ISCs) and increased secretory lineages were observed in our study where Lkb1 was specfically deleted in Lgr5 ISCs using Lgr5-EGFP-creERT2 (Tamoxifen) deletor. To gain mechanistic insight how Lkb1 maintains intestinal epithelial stem cell homeostasis, Lkb1 deficient ISCs (Lgr5-high cells) and progenitors (Lgr5-low cells) are isolated by flow cytometry and profiled by RNA sequencing to compare with controls (Lkb1 wild type ISCs and progenitors).

2020-02-29 | E-MTAB-6501 | biostudies-arrayexpress

Unlimited in vitro expansion of adult bi-potent pancreas progenitors through the Lgr5/Rspondin axis

2013-09-17 | GSE50103 | GEO

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