Project description:In order to characterize the changes in global gene expression in the distal colon of constipated SD rats in response to the laxative effects induced by aqueous extract of Liriope platyphylla (AEtLP) including isoflavone, saponin, oligosaccharide, succinic acid and hydroxyproline, total RNA extracted from the distal colon of AEtLP-treated constipation rats was hybridized to oligonucleotide microarrays.Overall, 581 genes were up-regulated and 216 genes were down-regulated by constipation induced by loperamide, while 67 genes were up-regulated and 421 genes were down-regulated by AEtLP treatment in constipated rats compared to controls. Among the transcripts up-regulated by constipation, 89 were significantly down-regulated and 20 were recovered to normal levels by AEtLP treatment. The major genes in the down-regulated categories included Slc9a5, klk10, Fgf15 and Alpi, while the major genes in the recovered categories were Cyp2b2, Ace, G6pc and Setbp1. However, nine of these genes that were down-regulated by constipation were significantly up-regulated and four were recovered to normal levels by AEtLP treatment. The major genes in the up-regulated categories included Serpina3n, Lcn2 and Slc5a81, while the major genes in the recovered categories were Tmem45a, Rerg and Rgc32. Constipation was induced in SD rats by subcutaneous injection of loperamide for 3 days. At 15 hr after the final treatment of loperamide, each animal were received a consistent volume of water or 15 uL/g body weight of AEtLP (1,000 mg/kg weight) via oral administration for once at 9 AM.
Project description:In order to characterize the changes in global gene expression in the distal colon of constipated SD rats in response to the laxative effects induced by aqueous extract of Liriope platyphylla (AEtLP) including isoflavone, saponin, oligosaccharide, succinic acid and hydroxyproline, total RNA extracted from the distal colon of AEtLP-treated constipation rats was hybridized to oligonucleotide microarrays.Overall, 581 genes were up-regulated and 216 genes were down-regulated by constipation induced by loperamide, while 67 genes were up-regulated and 421 genes were down-regulated by AEtLP treatment in constipated rats compared to controls. Among the transcripts up-regulated by constipation, 89 were significantly down-regulated and 20 were recovered to normal levels by AEtLP treatment. The major genes in the down-regulated categories included Slc9a5, klk10, Fgf15 and Alpi, while the major genes in the recovered categories were Cyp2b2, Ace, G6pc and Setbp1. However, nine of these genes that were down-regulated by constipation were significantly up-regulated and four were recovered to normal levels by AEtLP treatment. The major genes in the up-regulated categories included Serpina3n, Lcn2 and Slc5a81, while the major genes in the recovered categories were Tmem45a, Rerg and Rgc32.
Project description:Constipation affects approximately 15% of the global population, and gut microbiota dysbiosis is implicated in its pathogenesis. Rothia mucilaginosa, a commensal bacterium with established anti-inflammatory properties, has not been previously investigated for its effects on intestinal function. In this study, we evaluated the therapeutic potential of R. mucilaginosa in a loperamide-induced constipation mouse model using multiomics approaches. Twenty-six SPF male C57BL/6 mice were divided into normal control (NC, n=8), constipation model control (MC, n=8), and R. mucilaginosa-treated (RG, n=10) groups. R. mucilaginosa intervention significantly improved fecal output and induced gut microbiota remodeling, including enrichment of Akkermansia muciniphila and Alistipes finegoldii. To characterize host molecular responses, RNA-seq was performed on colon tissues to identify differentially expressed genes and pathways associated with constipation alleviation, with particular focus on neuroactive pathway activation.
Project description:To pinpoint a distinctive gene associated with constipation resulting from C3 deficiency, we conducted microarray hybridization using total RNA extracted from the mid colon of C3 knockout (C3 KO) mice. Identification of causal genes through comparison of gene expression levels in mice induced with C3 deficiency.
Project description:To investigate the pathogenesis of slow transit constipation (STC), we have employed microarray-based miRNA analysis as a discovery platform to identify miRNAs potentially related with STC pathogenesis.Full-thickness specimens were obtained from colons of STC patients undergoing total colectomy and ileorectal anastomosis or subtotal colectomy with antiperistaltic cecoproctostomy. And patients undergoing radical surgery for non-obstructing colon cancer (left colon cancer) as control. These patients were not constipated and had no colonic dilatation. The control specimens were obtained at least 5 cm from the resection margin in tumor free areas. Expression of five miRNAs (miRNA-128, miRNA-129-3p, miRNA-20b,miRNA-27b and miRNA-30b) from this signature was identified by arbitrarily setting the threshold at a fold change of 1.3 or above combined with p < 0.05 in the same RNA samples. Expression of miRNAs in the colon may be involved in STC pathogenesis.
2014-05-27 | GSE57969 | GEO
Project description:Slow transit constipation and normal colon tissue sequencing
Project description:<p>Untargeted metabolomics was performed on colon tissue from 26 C57BL/6 mice to investigate metabolic mechanisms underlying Rothia mucilaginosa-mediated constipation alleviation. Mice were divided into normal control (NC, n=8), loperamide-induced constipation model control (MC, n=8), and R. mucilaginosa gavage-treated (RG, n=10) groups. The experimental protocol consisted of adaptation (days 0-7), loperamide modeling (days 8-21), and R. mucilaginosa intervention (days 22-40, BNCC363031, 2x10^8 CFU/day). Colon tissue metabolomics was performed using UHPLC-MS/MS (Vanquish UHPLC coupled with Orbitrap Exploris 120, Thermo Fisher) in both positive and negative ionization modes. This dataset supports the identification of differential metabolites and metabolic pathways associated with R. mucilaginosa intervention in constipation, with particular focus on tryptophan metabolism, bile acid metabolism, and neuroactive signaling.</p>
Project description:To investigate whether miRNAs in the colon tissue of rats in the IBS-D group differ from those in the blank group, we performed high-throughput sequencing of miRNAs
Project description:The goal of this study is to compare the differently expressed genes in colon tissue of Control and loperamide (LOP) induced slow transit constipation (STC) rat model with or without Golden Bifid (Jin Shuang Qi, JSQ) or positive control group (Prukapril Succinate Tablet, PST) treatment. The loperamide induced STC rat model were randomly divided into 3 groups: LOP, LOP + JSQ and LOP + PST groups (n=6 for each group). Control rats (n=6) were set as control. The STC rat model was induced by administering loperamide intraperitoneally at a dose of 3 mg/kg body weight twice daily for 21 days in all groups except the Control group. On the 8th day, the LOP + JSQ group was intragastrically with 0.540 g/kg/d 1 h after each loperamide administration for 14 days. The LOP + PST group was given prucalopride succinate tablets at a dose of 0.18 mg/kg/d by oral gavage 1 h after each loperamide administration for 14 days. Then the colon tissues were used to identify differentially expressed genes among different groups.
Project description:To investigate the pathogenesis of slow transit constipation (STC), we have employed microarray-based miRNA analysis as a discovery platform to identify miRNAs potentially related with STC pathogenesis.Full-thickness specimens were obtained from colons of STC patients undergoing total colectomy and ileorectal anastomosis or subtotal colectomy with antiperistaltic cecoproctostomy. And patients undergoing radical surgery for non-obstructing colon cancer (left colon cancer) as control. These patients were not constipated and had no colonic dilatation. The control specimens were obtained at least 5 cm from the resection margin in tumor free areas. Expression of five miRNAs (miRNA-128, miRNA-129-3p, miRNA-20b,miRNA-27b and miRNA-30b) from this signature was identified by arbitrarily setting the threshold at a fold change of 1.3 or above combined with p < 0.05 in the same RNA samples. Expression of miRNAs in the colon may be involved in STC pathogenesis. The samples were obtained and washed with cold PBS, transported in liquid nitrogen and immediately stored in liquid nitrogen after removal. Total RNA was isolated from frozen histologic specimens using a mirVana™ RNA isolation Kit.