Project description:To profile the expression of circulating microRNAs (miRNAs) of mice in experimental sepsis by cecal ligation and puncture (CLP), the whole blood samples were obtained from C57BL/6 mice at 4, 8, and 24 h following CLP for miRNA expression analysis using a miRNA array (The Mouse & Rat miRNA OneArray® v3). Briefly, mice were anesthetized with a combination of ketamine and xylazine as the anesthetic/analgesic agents and a midline abdominal incision was made. The cecum was mobilized, ligated in the middle of cecum below the ileocecal valve, punctured once with a 21 G needle, and a little stool was squeeze out of the cecum to induce polymicrobial peritonitis. The abdominal wall was closed in two layers. Sham-operated mice underwent the same procedure, including opening the peritoneum and exposing the bowel, but without ligation and needle perforation of the cecum.
Project description:SPF leghorn chickens were infected with C. jejuni. The cecum were collected at 8h post infection for total RNA isolation. The significantly expressed microRNAs between infected and non-infected chickens were identified through Solexa sequencing technology.
Project description:To profile the expression of circulating microRNAs (miRNAs) of mice in experimental sepsis by cecal ligation and puncture (CLP), the whole blood samples were obtained from C57BL/6 mice at 4, 8, and 24 h following CLP for miRNA expression analysis using a miRNA array (The Mouse & Rat miRNA OneArray® v3). Briefly, mice were anesthetized with a combination of ketamine and xylazine as the anesthetic/analgesic agents and a midline abdominal incision was made. The cecum was mobilized, ligated in the middle of cecum below the ileocecal valve, punctured once with a 21 G needle, and a little stool was squeeze out of the cecum to induce polymicrobial peritonitis. The abdominal wall was closed in two layers. Sham-operated mice underwent the same procedure, including opening the peritoneum and exposing the bowel, but without ligation and needle perforation of the cecum. the whole blood samples were obtained from C57BL/6 mice at 4, 8, and 24 h following CLP for miRNA expression analysis using a miRNA array (The miRNA OneArray® v3).
Project description:White leghorn layers were infected with Salmonella Enteritidis. The cecum were collected at 7 days post infection for total RNA isolation. The significantly expressed microRNAs between infected and non-infected chickens were identified through Solexa sequencing technology.
Project description:To understand how cholera toxin (CT) produced by Vibrio cholerae modulates gene expression of this organism within the intestine, RNA-seq analysis was performed on two samples each of WT and the ∆ctx mutant bacteria harvested from either the infant rabbit ileum or the cecum one-day post-intragastric infection. We found that 243 genes that were significantly up-regulated in the WT compared to the ∆ctx mutant and these included 101 genes in ileum samples, 118 in the cecum samples, and 24 in both samples. We found that genes known to be induced under low-iron growth conditions were up-regulated in WT relative to the ∆ctx mutant in both the ileum and in the cecum, with a marked up-regulation in the ileum relative to the cecum. We also found that genes involved in TCA cycle metabolism, L-Lactate utilization, and LCFA utilization were significantly up-regulated in the WT in the ileum relative to the ∆ctx mutant during infection. We conclude that CT-induced disease creates an iron-depleted metabolic niche in the gut that modulates the transcriptional profile of this pathogen during infection.