Expression data from laser captured gastric neck cells and zymogenic cell from wild type and MIST1 knockout mice
Ontology highlight
ABSTRACT: MIST1 is a bHLH transcription factor that is necessary for the maturation of gastric zymogenic cells as they differentiate from their precursor mucous neck cells. In this experiment, mucous neck cells and zymogenic cells of normal, adult C57BL/6 and MIST1 knockout mice were laser-capture microdissected in order to determine MIST1-dependent, zymogenic cell specific gene expression. Stomachs were excised immediately following sacrifice, quickly flushed with room-temperature PBS, inflated by duodenal injection of OCT compound, frozen in Cytocool II, and cut into serial 7-M-NM-
Project description:MIST1 is a bHLH transcription factor that is necessary for the maturation of gastric zymogenic cells as they differentiate from their precursor mucous neck cells. In this experiment, mucous neck cells and zymogenic cells of normal, adult C57BL/6 and MIST1 knockout mice were laser-capture microdissected in order to determine MIST1-dependent, zymogenic cell specific gene expression.
Project description:Continuous regeneration of digestive enzyme (zymogen) secreting chief cells is a normal aspect of stomach function that is disrupted in pre-cancerous lesions. Regulation of zymogenic cell (ZC) differentiation is poorly understood. Here we profile Parietal, Pit, and Zymogenic cells for comparison and study. Keywords: Bhlhb8, Mist1, mucous neck cell, laser-capture microdissection, zymogenic, gastric cell differentiation
Project description:The transcription factor MIST1 is required for final maturation of secretory cells of diverse tissues, including gastric digestive-enzyme secreting zymogenic (chief) cells (ZCs). Here, we show that MIST1 directly activates RAB26, RAB3D and several other genes.
Project description:Continuous regeneration of digestive enzyme (zymogen) secreting chief cells is a normal aspect of stomach function that is disrupted in pre-cancerous lesions. Regulation of zymogenic cell (ZC) differentiation is poorly understood. Here we profile Parietal, Pit, and Zymogenic cells for comparison and study. Experiment Overall Design: Samples were obtained through Laser-capture microdisection of gastric epithelium. The three samples come from enrichments for Zymogenic Cells (ZC), Parietal Cells (PC), and Mucus Pit Cells (Pit). Experiment Overall Design: Individual parietal cells (visualized by DBA-positivity and autofluorescence) from well-oriented gastric units were dissected (PixCell II LCM apparatus, 7.5-µm spot diameter; CapSure HS LCM caps, Arcturus, Mountain View, CA) one-at-a-time from the pit zone and collected for GeneChips. Pit cells (E-cadherin-positive, DBA-negative) were then collected from the same gastric units. Only the pit cells in a 2-3-cell-thick region at the apex of the gastric unit â?? but not yet upon the gastric surface â?? were taken. ZCs (E-cadherin-positive, GSII/DBA-negative cells in the base zones) were collected from different slides in corpus gastric units after potentially contaminating basal parietal cells had first been dissected and discarded. 3000-5000 individual cells from each cell lineage were isolated from 4-5 individual mice, and RNA was purified by PicoPure kit (Arcturus). RNA integrity was verified, and RNAs for each lineage were pooled from multiple mice and multiple dissections to make 20 ng total RNA, which was then amplified, labeled, and fragmented (by the Arcturus RiboAmp HS kit followed by the RNA Amplification and Labeling Kit from Enzo Life Sciences). The resulting biotinylated cRNA probes were hybridized to Affymetrix (Santa Clara, CA) GeneChip® Mouse Genome 430 2.0 microarrays.
Project description:The transcription factor MIST1 is required for final maturation of secretory cells of diverse tissues, including gastric digestive-enzyme secreting zymogenic (chief) cells (ZCs). Here, we show that MIST1 directly activates RAB26, RAB3D and several other genes. Experiment Overall Design: We used microarrays to determine genes upregulated following transient MIST1 transfection. Two gastric cell lines were used: HGC-27 and AGS. Three chips were generated from each cell line: parental (untransfected), GFP+empty vector (a control for effects of transfection), and GFP+MIST1. The latter two chips were generated from cells flow sorted based on GFP fluorescence to isolate cells with high levels of transfection. Chips were analyzed by dChip to identify genes expressed in both MIST1-transfected cell populations relative to their respective controls in multiple Boolean 'AND' comparisons.
Project description:In this experiment, mucous neck cells from the gastric epithelium of normal, adult C57/B6 mice were laser-capture microdissected to determine gene expression in neck cells relative to pit cells, parietal cells, and zymogenic cells, whose expression profiles were previously deposited in GEO. In this screening experiment, only a single replicate Mouse Genome 430 2.0 GeneChip was generated from laser-capture microdissected cells in the neck region of the gastric unit (identified by positive staining with AlexaFluor-488-GS-II lectin positivity and/or position in the middle of the gastric unit with low labeling with E-cadherin and seconndary Alexafluor-488). RNA was purified by PicoPure kit, RNA integrity verified on Agilent Bioanalyzer, and total RNA pooled from multiple dissections and multiple mice to make ~100 ng RNA, which was then amplirifed, labeled, and fragmented (by Arctureus RiboAmp HS kit followed by the RNA Amplification and Labeling Kit from Enzo Life Sciences). Biotinylated cRNA probes were hybridized to the GeneChips. Given the inevitable contamination of the RNA with RNA from parietal cells, this GeneChip is used only in comparisons with laser-captured parietal cells described in GSE5018 as a baseline reference.
Project description:In this experiment, mucous neck cells from the gastric epithelium of normal, adult C57/B6 mice were laser-capture microdissected to determine gene expression in neck cells relative to pit cells, parietal cells, and zymogenic cells, whose expression profiles were previously deposited in GEO.
Project description:Transcription profiling by array of pancreatic tissues from wild-type mice, Mist1 knockout mice and Mist1 knockout mice with induced (rescued) MIST1 expression
Project description:A dozen of cells expressing various marker genes was defined as adult gastric epithelial stem cells. Do these cells represent different cell types or they are just the same cell with cycling expression of different marker genes? The origin of the adult stem cells could answer this question. Yet, the identity of the embryonic gastric progenitors was not known. We performed single cell RNA-sequencing to characterize cellular composition of the embryonic stomach at the time of initiation of cytodifferentiation. Our analysis of the scRNA-seq data led to identification of two different embryonic gastric epithelial progenitors. Further, we have defined signals that control their maintenance and differentiation along four main lineages, such as mucous pit, zymogenic, parietal and endocrine cells.
Project description:MIST1 over-expression has not been analyzed in a cell type that does not express endogenous MIST1. Here, we force-express ectopic MIST1 in the hepatocytes of mouse livers. We extracted mRNA and compared gene expression levels between MIST1-expressing mouse livers to controls.