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LGR5 is a conserved marker of hair follicle stem cells across species

ABSTRACT: Using a transgenic pig expressing H2B-GFP under the control of the endogenous LGR5 promoter, we used fluorescence activated cell sorting to isolate LGR5-high and LGR5-negative epidermal cells to generate mRNA profiles of the hair follicle stem cell population, n=2 pigs. Bulk RNAseq samples were prepared from porcine cells, at least 500ng of RNA was extracted from sorted LGR5-GFP-high or LGR5-GFP-negative populations. RNAseq was performed externally by GENEWIZ; library preparation with poly(A) selection was performed followed by paired end 150bp sequencing on Illumina HiSeq.

ORGANISM(S): Sus scrofa

PROVIDER: GSE190069 | GEO | 2021/12/04

REPOSITORIES: GEO

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Lgr5+tuft marker+ intestinal tumor cells

Project description:We previously identified Dclk1, a tuft cell marker, marks tumor stem cells (TSCs) in mouse intestinal tumors. In this study, we have identified IL17RB as a cell surface marker distinctively expressed by Dclk1+ tuft-like tumor cells in mouse intestinal tumors. Using this tuft cell marker, we compared and analyzed the transcriptome of Lgr5-tuft marker-, Lgr5+tuft marker-, Lgr5-tuft marker+, and Lgr5+tuft marker+ tumor cells. These analyses revealed that tuft-like tumor cells in the intestinal tumors comprise two distinct subsets: highly differentiated tuft-like tumor cells (Lgr5-tuft marker+ cells) and tuft-like tumor cells with TCS potential (Lgr5+tuft marker+ cells).

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Gene expression profiling of Lgr5 positive cells within intestinal adenomas

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Lgr5+tuft marker+ intestinal tumor cells

Project description:Lgr5+tuft marker+ intestinal tumor cells

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RNA-seq of LGR5(+) and LGR5(-) cells isolated from human colon adenoma organoids and targeted DNA-seq of a colorectal biobank

Project description:This study has two components: (1) Human colon adenoma organoids (n=4 patients) were dissociated into single cells. Cells were incubated with a magnetic bead bound to an LGR5 antibody and run through a magnetic column. Magnet bound cells and flow through negative (FTN) cells were obtained. Magnet bound and FTN cells were incubated with an APC-check reagent (which binds to the magnetic bead on the LGR5 antibody) and DAPI, before being sorted by flow cytometry. 3 populations of live (DAPI-) cells were collected: FTN: Flow through negative. LGR5 negative by magnet and by flow cytometry SortedNeg: Magnet bound cells that were negative for LGR5 by flow cytometry SortedPos: Magnet bound cells that were positive for LGR5 by flow cytometry (2) Human colon organoids, as well as the tissue the organoid was derived from and adjcacent normal tissue (from n=19) were also profiled for known colorectal cancer associated mutations using the Qiagen Qiaseq Colorectal Cancer Panel, which provides targeted sequencing information for 71 genes.

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Project description:The identification of Lgr5 as an intestinal stem cell marker has made it possible to isolate and study primary stem cells from small intestine and skins. Applying genome-wide resequencing of bisulfite-treated genomic DNA, we profiled the DNA methylation changes of FACS-sorted Lgr5+ve stem cells and their immediate undifferentiated daughter cells from small intestine and skin. In addition to this, we also analyzed terminally differentiated villus cells. We find that terminal differentiation of an adult solid-tissue stem cell does not require DNA methylation dynamics at transcriptional start sites, but is characterized by hypo-methylation of enhancer-like domains. We used cell fractions of intestines from Lgr5-EGFP-ires-CreERT2 mice, expressing GFP under the control of the Lgr5 promoter. RNA was isolated from several FACS-sorted cell populations, one expressing GFP at high levels (GFPhi) and the other expressing GFP at low levels (GFPlow), both from small intestine and skin. We also isolated RNA from intestinal epithelial villus cells. Differentially labelled cRNA from GFPhi, GFPlow and villus cells from three different sorts (each combining three different mice) were hybridized on Affymetrix HT MG-430 PM arrays.

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Distinct populations of embryonic epithelial progenitors generate Lgr5+ intestinal stem cells

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