Colonic gene expression upon dietary treatment
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ABSTRACT:
ORGANISM(S): Rattus norvegicus
PROVIDER: GSE5943 | GEO | 2007/12/01
SECONDARY ACCESSION(S): PRJNA97393
REPOSITORIES: GEO
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Project description:To increase our knowledge of the effects of Fructo oligosaccharides (FOS) on the intestinal barrier function in rats, a controlled rat infection study was performed. Two groups of rats (n=12 per group) were adapted to a diet with or without FOS. mRNA was collected from the mucosa of the cecum and changes in gene expression were assessed using an agilent rat whole genome microarray (G4131A Agilent Technologies). Results indicate that dietary FOS influences immune response and wound healing mechanisms, which will most likely affect the intestinal barrier. Keywords: Dietary treatment, cecum mucosa, Rat
2007-12-31 | GSE8587 | GEO
Project description:To increase our knowledge of the effects of Fructo oligosaccharides (FOS) on the intestinal barrier function in rats, a controlled rat infection study was performed. Two groups of rats were adapted to a diet with or without FOS. mRNA was collected from the mucosa of the colon and changes in gene expression were assessed using an agilent rat whole genome microarray (G4131A Agilent Technologies). Results indicate that dietary FOS influences energy metabolism, which will most likely play a role in the effects of FOS on the intestinal barrier. Experiment Overall Design: In the present study, large-scale gene expression analysis was performed to reveal mechanistic details of FOS induced gene expression in vivo in the colon mucosa. Wistar rats were adapted to diets with or without FOS for 14 days. RNA was isolated from colonic mucosal scrapings. Agilent rat whole genome microarray containing 44290 60-mer spots, were used to study FOS induced gene expression changes in order to better understand the FOS induced effects on the intestinal barrier of rats.
2008-06-14 | E-GEOD-5943 | biostudies-arrayexpress
Project description:To increase our knowledge of the effects of Fructo oligosaccharides (FOS) on the intestinal barrier function in rats, a controlled rat infection study was performed. Two groups of rats (n=12 per group) were adapted to a diet with or without FOS. mRNA was collected from the mucosa of the cecum and changes in gene expression were assessed using an agilent rat whole genome microarray (G4131A Agilent Technologies). Results indicate that dietary FOS influences immune response and wound healing mechanisms, which will most likely affect the intestinal barrier. Experiment Overall Design: In the present study, large-scale gene expression analysis was performed to reveal mechanistic details of FOS induced gene expression in vivo in the cecum mucosa. Wistar rats were adapted to diets with (n=12) or without FOS (n=12) for 14 days. RNA was isolated from cecum mucosal scrapings, two RNA samples from the control group were ecluded based on poor quality of RNA. Agilent rat whole genome microarray containing 44290 60-mer spots, were used to study FOS induced gene expression changes in order to better understand the FOS induced effects on the intestinal barrier of rats.
2008-06-18 | E-GEOD-8587 | biostudies-arrayexpress
Project description:To increase our knowledge of the effects of Fructo oligosaccharides (FOS) on Salmonella infection in fats, a controlle rat infection study was performed. Two groups of 12 rats were adapted for 14 days to a cellulose diet and one group of 12 rats to a FOS diet. One cellulose-fed group and the FOS-fed group were infected with Salmonella. Two days post infection mRNA was collected from the mucosa of the colon and changes in gene expression were assessed using an Agilent rat whole genome microarray (G4131A Agilent Technologies). Results indicate that Salmonella affects colonic mucosal gene expression, which is further enhanded by dietary FOS. Keywords: Dietary infection study, colon mucosa, Rat
2007-10-18 | GSE7472 | GEO
Project description:To increase our knowledge of the effects of Fructo oligosaccharides (FOS) on Salmonella infection in fats, a controlle rat infection study was performed. Two groups of 12 rats were adapted for 14 days to a cellulose diet and one group of 12 rats to a FOS diet. One cellulose-fed group and the FOS-fed group were infected with Salmonella. Two days post infection mRNA was collected from the mucosa of the colon and changes in gene expression were assessed using an Agilent rat whole genome microarray (G4131A Agilent Technologies). Results indicate that Salmonella affects colonic mucosal gene expression, which is further enhanded by dietary FOS. Experiment Overall Design: In the present study, large-scale gene expression analysis was performed to reveal whether Salmonella induced changes of colonic mucosal gene expression in rats. Furthermore, we compared the colonic gene expression changes of infected rats fed a diet supplemented with Fructo oligosaccharides (FOS) or cellulose as control. Two groups of Wistar rats (n=12) were adapted for 14 days to a cellulose diet and one group (n=12) to a FOS diet. One cellulose-fed group and the FOS-fed group were infected with Salmonella. RNA was isolated from colonic mucosal scrapings. mRNA samples of 12 rats per group were pooled. Each group-sample was hybridised in duplicate on Agilent rat whole genome microarrays containing 44290 60-mer spots.
2008-06-15 | E-GEOD-7472 | biostudies-arrayexpress
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
2007-10-18 | GSE7496 | GEO
Project description:A diet rich in dietary fiber and polyphenols supports the normal intestinal barrier function crucial for intestinal and overall health. Birch wood-derived fiber containing glucuronoxylans (GX)- and polyphenols have the potential in multiple food technological applications and have favorable effects on gut microbiota and colonic metabolism. However, their impact on intestinal barrier function is unknown. To elucidate their potential as new intestinal health-supporting food ingredients, we investigated the effect of GX- and polyphenol-rich extract (GXpoly ) and highly purified GX-rich extract (pureGX) on the gene expression of the colon mucosa.
2023-12-01 | GSE230139 | GEO
Project description:Gene expression analysis of 1,2-dimethylhydrazine (DMH)-induced colon cancer in F344 rats. 9 tumours and their paired normal mucosa were hybridized on 4x44K Agilent Whole rat arrays.
2010-07-20 | E-MEXP-2471 | biostudies-arrayexpress
Project description:Emerging knowledge shows the importance of early life events in programming the intestinal mucosal immune system and development of the intestinal barrier function. These processes depend heavily on close interactions between gut microbiota and host cells in the intestinal mucosa. In turn, development of the intestinal microbiota is largely dependent on available nutrients and substrates required for the specific microbial community structures to expand. It is currently not known what the specificities are of intestinal microbial community structures in relation to the programming of the intestinal mucosal immune system and development of the intestinal barrier function. The objective of the present study was to investigate the effect of a nutritional intervention on intestinal development of suckling piglets by daily oral administration of fructooligosaccharides (FOS) over a period of 12 days. At the microbiota community level a clear “bifidogenic” effect of the FOS administration was observed in colon digesta at day 14. The former, however, did not translate into significant changes of local gene expression in the colonic mucosa. In the jejunum, significant changes were observed for microbiota composition at day 14, and microbiota diversity at day 25. In addition, significant differentially expressed gene sets in mucosal tissues of jejunum were identified at both days 14 and 25 of age. At the age of 14 days, lower activity of cell cycle-related processes and a higher activity of extracellular matrix processes were observed in jejunal scrapings of piglets supplemented with FOS compared to control piglets. At day 25, lower activity of immune-related processes in jejunal tissue were seen in piglets supplemented with FOS. Histological parameters, villi height and crypt depth, were significantly different at day 25 between the experimental and control group, where piglets supplemented with FOS had higher villi and deeper crypts. We conclude that oral FOS administration during the suckling period of piglets has significant bifidogenic effects on the microbiota in the colon and on gene expression in jejunal mucosa scrapings. We hypothesize that FOS supplementation of suckling piglets results in a higher butyrate production in the colon due to the increase in bifidobacteria and lactobacilli in the hindgut. We further speculate that a higher butyrate production in colonic digesta relates to changes in gene expression in the jejunum by thus far unknown mechanisms.
2018-01-29 | GSE101147 | GEO
Project description:Background and Aims: We have shown in several controlled rat and human infection studies that dietary calcium improves intestinal resistance and strengthens the mucosal barrier. Reinforcement of gut barrier function is also relevant for inflammatory bowel disease (IBD). Therefore, we investigated the effect of supplemental calcium on spontaneous colitis development in HLA-B27 transgenic rats, an experimental animal model of IBD. Methods: HLA-B27 transgenic rats were fed a purified high-fat diet containing either a low or high calcium content (30 and 120 mmol CaHPO4/kg diet, respectively) for almost 7 weeks. Inert chromium ethylenediamine-tetraacetic acid (CrEDTA) was added to the diets to quantify intestinal permeability by measuring urinary CrEDTA excretion. Relative fecal dry-weight was determined to quantify diarrhea. Colonic inflammation was determined histologically, and by measuring mucosal interleukin-1β. In addition, colonic mucosal gene expression of individual rats was analyzed, using whole genome microarrays. Interesting results were verified by Q-PCR. Results: The high-calcium diet significantly prevented the increase in intestinal permeability and diarrhea with time in HLA-B27 rats developing colitis as compared to the low-calcium group. The histological colitis score and mucosal interleukin-1β levels were lower in high-calcium fed rats. Supplemental calcium prevented the colitis-induced increase in the expression of extracellular matrix remodeling genes (e.g. matrix metalloproteinases, procollagens and fibronectin), which was confirmed by Q-PCR. Conclusions: Dietary calcium inhibits colitis development in HLA-B27 transgenic rats. Calcium prevents the colitis-related increase in intestinal permeability, diminishes diarrhea, and lowers the inflammatory response in the mucosa, resulting in less extracellular matrix breakdown. Keywords: nutritional intervention
2009-07-17 | GSE11022 | GEO