Project description:Gene expression in the colonic mucosa of wild-type and p38a-knockout intestinal epithelial cells (IECs) were compared. C57BL/6 wild-type mice, and intestinal epithelial cell-specific p38a-knockout mice on a C57BL/6 background were used for isolation of colonic mucosa
Project description:Gene expression in the colonic mucosa of wild-type and p38a-knockout intestinal epithelial cells (IECs) were compared. C57BL/6 wild-type mice, and intestinal epithelial cell-specific p38a-knockout mice on a C57BL/6 background were used for isolation of colonic mucosa Gene expression in each genotype was analyzed in triplicate.
Project description:Specific Aims:
* To determine if curcuminoids modulate cellular proliferation as measured by proliferating cell nuclear antigen (PCNA) in the colorectal mucosa of subjects with previously resected adenomatous colonic polyps.
Hypothesis: Curcuminoids decrease cellular proliferation in the colorectal mucosa of subjects with previously resected sporadic adenomatous colonic polyps.
* To determine if curcuminoids modulate apoptosis, as measured by TUNEL assay, in the colorectal mucosa of subjects with previously resected adenomatous colonic polyps.
Hypothesis: Curcuminoids increase apoptosis in colorectal mucosa of subjects with previously resected sporadic adenomatous colonic polyps.
* To determine if curcuminoids modulate COX-2 expression as measured by immunohistochemical assays in subjects with previously resected adenomatous colonic polyps
Hypothesis: Curcuminoids decrease colorectal mucosa COX-2 expression in subjects with previously resected sporadic adenomatous colonic polyps.
* To determine if curcuminoids modulate COX-2 activity as measured by urinary eicosanoids
Hypothesis: Curcuminoids decrease concentrations of urinary eicosanoids.
Project description:Analysis of gene expression in partial Dnmt3a deleted colon mucosa cells of APC(Min/+) mice. In the present study the influence of Dnmt3a deletion on colonic tumorigenesis, gene expression and DNA methylation was analyzed. Results provide important information about the role of Dnmt3a in colonic tumorigenesis.
Project description:Overexpression of human progastrin (hGAS) in mice has been observed to increase colonic mucosa proliferation significantly, but the mechanism and receptors of progastrin have not been defined. We investigated this mechanism by observing the microarray gene expression in mGAS-/- mice, WT mice, and hGAS transgenic mice. Gene expression of colonic mucosa of WT C57BL/6 mice,Gas-/- C57BL/6 mice, and hGAS transgenic mice, all 6 weeks old were compared.
Project description:To test the hypothesis that defects in the termination of inflammatory signaling led to colon inflammation, we isolated RNA from the colonic mucosa of Itch-/- mice and from the colonic mucosa of wild-type mice treated with DSS and performed genome-wide mRNA expression profiling by RNA sequencing.
Project description:Salmonella enteritidis is suggested to translocate in the small intestine. Previously we identified that prebiotics, fermented in the colon, increased Salmonella translocation in rats, suggesting involvement of the colon in translocation. Effects of Salmonella on colonic gene expression in vivo are largely unknown. The aim of this study was to characterize time dependent Salmonella induced changes of colonic mucosal gene expression in rats using whole genome microarrays. Rats were orally infected with Salmonella enteritidis to mimic a foodbore infection and colonic gene expression was determined at day 1, 3 and 6 post-infection (n=8 per timepoint). Agilent rat whole genome microarray (G4131A Agilent Technologies) were used. Results indicate that colon is clearly a target tissue for Salmonella considering the abundant changes in mucosal gene expression observed. Keywords: Time point infection study, colon mucosa, Rat
Project description:Colorectal cancer (CRC) is the third most common cancer worldwide. Colorectal polyps are recognised pre-cursors of CRC, however hyperplastic polyps lack malignant potential. The purpose of this study was to identify differences in gene expression between normal colonic mucosa, hyperplastic and adenomatous polyps from disease-free individuals. By comparing polyps believed to have malignant potential (adenomatous polyps) with hyperplastic polyps it is hoped that new insights into colorectal carcinogenesis can be achieved. 24 colonic samples comprising 8 normal colonic mucosa, 8 hyperplastic polyps and 8 adenomatous polyps.
Project description:Gene expression profiles of nine paired samples collected from formalin-fixed and paraffin embedded primary tumor and normal colonic mucosa in the OCH paired cohort.