Project description:Purpose: To examine the expression profile of WT and Stat6 KO intestinal stem cells. Methods: We isolated Lgr5+ ISCs from the intestine tissue, and generated Stat6 KO ISCs through CRISPR/Cas9 approach. Results: Many genes are changed upon Stat6 KO cells. We pay special attention on Wnt/β-catenin signaling that is the most critical pathway in ISCs, and discovered Stat6 drove the expression of Wnt target genes. Conclusions: Stat6 crosstalks with Wnt signaling to drive ISC self-renewal.
Project description:To identify the potential genes that regulated by Trim24 through Stat6 DNA binding activity, we immunoprecipitated chromatin from WT or Trim24-KO macrophages stimulated with IL-4, and analyzed the precipitated DNA with deep sequencing (ChIP-Seq).
Project description:To investigate the roles of SIRT6 and IL4/IL13-STAT6 pathway in intestinal epithelium homeostasis, we generated IEC-specifc Sirt6 knockout mice and transgenic mice with IEC-specific overexpression of constitutively activated STAT6 (STAT6vt). IECs from these mice were isolated and RNA were extracted and performed RNAseq analysis.
Project description:To study the epigenetic regulation of intestinal epithelium we focus on the role of chromatin modulators. Lysine-specific histone demethylase 1a (KDM1A, LSD1) is one of the enzymes that can erase the H3K4me1/2 mark. To assess the role of LSD1 in intestinal epithelium we studied wild type (WT) (Villin-Cre -; Lsd1f/f) and intestinal-epithelial-specific knock-out (KO) (Villin-Cre+; Lsd1f/f) mice. We found that KO mice completely lack Paneth cells, and have altered stem cell characteristics compared to WT littermates. To assess genome-wide ATAC levels in WT and KO small intestines, we isolated intestinal epithelium tissue from wild type mice and LSD1 KO mice. This tissue was digested to single cells and performed ATAC seq as described in the protocols.
Project description:Purpose: To explore the molecular mechanisms of MST4 regulating intestinal stem cell homeostasis, RNA sequencing was performed to analyze the geome-wide change of MST4 KO IECs compared to those of WT mice. Methods: Total mRNA was extracted from IECs which were isolated from small intestines of Mst4 KO mice and WT mice (8 weeks) in triplicate respectively. Then RNA quality was assessed using an Agilent Bioanalyzer 2100 and the sample reads were sequenced using Illumina Hiseq 4000 platform. As a reasult, we got the transcript data using Hisat2 followed by Stringtie. qRT–PCR validation was performed using TaqMan and SYBR Green assays. Results: We mapped about 60 million sequence reads per sample to the mouse genome and identified about 50,000 transcripts in IECs of mice. Apprioximately 2,000 transcripts showed different expression between Mst4 KO and WT IECs, with a fold change ≥2 and p value <0.05. Gene set enrichment analysis (GSEA) showed a significantly negative enrichment of Wnt/b-catenin target genes and altered expression of 15 genes was confirmed with qRT–PCR, demonstrating the high degree of sensitivity of the RNA-seq method. Conclusion: Our study present the datiled transcripts analysis of IECs isolated from small intestines, with biologic replicates. Based on RNA-seq transcriptome characterization , we conclude a molecular mechanism of MST4 regulating intestinal stem cell homeostasis and provide a framework to understand the crosstalk of MST4 and Wnt/b-catenin signaling.
Project description:Expression profiling of WT and E2A-KO LSK FLT3- and LMPP protenitor cells. Experiment Overall Design: LSK FLT3- and LMPP stem/progenitor cells from WT and E2A-KO mice were FACS sorted. Subsequently RNA was extracted, labelled and hybridized to Affymetrix microarrays. Goal of experiment was to investigate expression changes between WT and KO LMPP cells.
Project description:mRNAseq and proteomic data set of one week old WT (Chop wt/wt CkmmCre wt/wt Dars2 fl/fl), Chop KO (Chop ko/ko CkmmCre wt/wt Dars2 fl/fl), Dars2 KO (Chop wt/wt CkmmCre tg/wt Dars2 fl/fl) and DKO (Chop ko/ko CkmmCre tg/wt Dars2 fl/fl) mice
Project description:To study the epigenetic regulation of intestinal epithelium we focus on the role of chromatin modulators. Lysine-specific histone demethylase 1a (KDM1A, LSD1) is one of the enzymes that can erase the H3K4me1/2 mark. To assess the role of LSD1 in intestinal epithelium we studied wild type (WT) (Villin-Cre -; Lsd1f/f) and intestinal-epithelial-specific knock-out (KO) (Villin-Cre+; Lsd1f/f) mice. We found that KO mice completely lack Paneth cells, and have altered stem cell characteristics compared to WT littermates. To assess genome-wide H3K4me1/2 levels in WT and KO small intestines, we sorted small intestinal crypt cells, fixed them, isolated chromatin, and performed ChIP using an H3K4me1 and an H3K4me2 antibody as described in the protocols.