show Abstracthide AbstractHere we show that epithelial BRG1, the catalytic subunit of SWI/SNF complex is critical for colitis and colitis-associated-cancer. Depletion of BRG1 in colonrectal epithelial cells make mice develop Spontaneous colitis. To dissect underlying mechanism, we conducted gene expression profile analysis (RNA-Seq) by using primary colonrectal epithelial cells isolated from BRG1CTRL and BRG1IEC-KO(Tamoxifen induced BRG1 knock-out) mice to gain molecular insights into the affected biological processes. To this end, colorectal epithelial cells were isolated after 7 days of tamoxifen treatment, on which day BRG1-depleted mice showed little morphological defects in colon in comparison with control littermates. IECs were isolated by EDTA isolation buffer. Each sample contains pooled mRNA from 3 mice, and was subjected to Hiseq RNA-Seq, performed by Guangzhou RiboBio Co., Ltd. (Guangzhou, China)using IlluminaHiSeq 3000 platform. Overall design: Genome-wide expression profiling of primary colon epethelial cells isolated form BRG1CTRL and BRG1IEC-KO(Tamoxifen induced BRG1 knock-out) mice,1 weeks prior to cell collection BRG1F/F and Villin-CreERT2,BRG1F/F mine were treated with tamoxifen.