Muc2-/- mice
Ontology highlight
ABSTRACT:
PROVIDER: PRJEB40115 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| ERR4555960.fastq.gz | Fastqsanger.gz | |||
| ERR4555970.fastq.gz | Fastqsanger.gz | |||
| ERR4555980.fastq.gz | Fastqsanger.gz | |||
| ERR4555990.fastq.gz | Fastqsanger.gz | |||
| ERR4556000.fastq.gz | Fastqsanger.gz |
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Project description:Intestinal epithelia are protected by a layer of mucin secreted by goblet cells against mechanical and chemical injuries, potent causes of inflammation, and the most abundant secreted intestinal mucin is encoded by the Muc2 gene. Genetic deletion of Muc2 causes intestinal inflammation in early stage and tumors after 3 months. The underlying mechanisms are not clear, but epigenetic alterations, particularly, up- and down-regulated microRNAs are involved in the malignant transformation from colitis to cancer. We used miRNA array to profile the differential expression of the miRNAs in Muc2-/- mouse colonic epithelial lin comparison with those in wild-type mice. Total RNA were extracted from mouse colonic epithelial cells and Muc2-/- and +/+, and the RNA were hybridized on Affymetrix miRNA microarray to determine the alterations of miRNAs during colitis development and its malignant transformation from colitis to cancer. To the end, we found miRNA were differential expressed in the Muc2-/- mice, among them 20 miRNAs were significantly downregulated and 71 miRNAs were significantly upregulated in Muc2-/- mice, in comparison with Muc2+/+ mice (change fold >2 or <0.5; T<0.01, p value< 0.05, q value< 0.05).
2014-05-31 | E-GEOD-56577 | biostudies-arrayexpress
Project description:Intestinal epithelia are protected by a layer of mucin secreted by goblet cells against mechanical and chemical injuries, potent causes of inflammation, and the most abundant secreted intestinal mucin is encoded by the Muc2 gene. Genetic deletion of Muc2 causes intestinal inflammation in early stage and tumors after 3 months. The underlying mechanisms are not clear, but epigenetic alterations, particularly, up- and down-regulated microRNAs are involved in the malignant transformation from colitis to cancer. We used miRNA array to profile the differential expression of the miRNAs in Muc2-/- mouse colonic epithelial lin comparison with those in wild-type mice.
2014-05-31 | GSE56577 | GEO
Project description:Background; MUC2 mucin produced by intestinal goblet cells is the major component of the intestinal mucus barrier. MUC2 homo-oligomerizes intracellularly into large secreted polymers which give mucus its viscous properties. The inflammatory bowel disease (IBD) ulcerative colitis is characterized by depleted goblet cells and a reduced mucus layer, whereas goblet cells and the mucus layer are increased in the other major inflammatory bowel disease, Crohnâs disease. Methods and Findings; By murine N-ethyl-N-nitrosourea-mutagenesis we identified two distinct non-complementing missense mutations in Muc2 exons encoding N- and C-terminal homo-oligomerization domains causing an ulcerative colitis-like phenotype. Both strains developed mild spontaneous distal intestinal inflammation, chronic diarrhea, rectal bleeding and prolapse, increased susceptibility to acute and chronic colitis induced by a luminal toxin, aberrant Muc2 biosynthesis, smaller goblet cell thecae (less stored mucin) and a diminished mucus barrier. Enhanced local production of IL-1beta, TNF-alpha and IFN-gamma was seen in the distal colon. The number of leukocytes within mesenteric lymph nodes was increased five-fold and leukocytes cultured in vitro produced both Th1 and Th2 cytokines (IFN-gamma, TNF-alpha and IL-13). Intestinal permeability was increased and the luminal bacterial flora were more heavily coated with immunoglobulin as occurs in IBD. This pathology was accompanied by accumulation of the Muc2 precursor and ultrastructural and biochemical evidence of endoplasmic reticulum (ER) stress in goblet cells, activation of the unfolded protein response, and altered intestinal expression of genes involved in ER stress, inflammation, apoptosis and wound repair. Expression of mutated Muc2 oligomerization domains in vitro demonstrated that aberrant Muc2 oligomerization underlies the ER stress. These models show that mutations in Muc2 oligomerization domains can lead to aberrant assembly of the Muc2 complex leading to ER stress, a depleted mucus barrier and intestinal inflammation. In ulcerative colitis we demonstrate similar accumulation of non-glycosylated MUC2 precursor in goblet cells together with ultrastructural and biochemical evidence of ER stress even in non-inflamed intestinal tissue. Conclusions; The observations that mucin misfolding and ER stress lead directly to intestinal inflammation and that ER stress and goblet cell pathology occur in ulcerative colitis suggest that ER stress-related mucin depletion could be a fundamental component of the pathogenesis of colitis. Experiment Overall Design: 3 individual mice from the Eeyore, Winnie or Wild-type strains were compared as groups. An Affymetrix ID was compared between groups if the ID was Present within two of the three mice within each grouping. IDs were compared by calculating the log2 of Group One average signal divided by Group 2 average signal.
2008-04-06 | E-GEOD-9913 | biostudies-arrayexpress
Project description:Background MUC2 mucin produced by intestinal goblet cells is the major component of the intestinal mucus barrier. MUC2 homo-oligomerizes intracellularly into large secreted polymers which give mucus its viscous properties. The inflammatory bowel disease (IBD) ulcerative colitis is characterized by depleted goblet cells and a reduced mucus layer, whereas goblet cells and the mucus layer are increased in the other major inflammatory bowel disease, Crohn’s disease. Methods and Findings By murine N-ethyl-N-nitrosourea-mutagenesis we identified two distinct non-complementing missense mutations in Muc2 exons encoding N- and C-terminal homo-oligomerization domains causing an ulcerative colitis-like phenotype. Both strains developed mild spontaneous distal intestinal inflammation, chronic diarrhea, rectal bleeding and prolapse, increased susceptibility to acute and chronic colitis induced by a luminal toxin, aberrant Muc2 biosynthesis, smaller goblet cell thecae (less stored mucin) and a diminished mucus barrier. Enhanced local production of IL-1beta, TNF-alpha and IFN-gamma was seen in the distal colon. The number of leukocytes within mesenteric lymph nodes was increased five-fold and leukocytes cultured in vitro produced both Th1 and Th2 cytokines (IFN-gamma, TNF-alpha and IL-13). Intestinal permeability was increased and the luminal bacterial flora were more heavily coated with immunoglobulin as occurs in IBD. This pathology was accompanied by accumulation of the Muc2 precursor and ultrastructural and biochemical evidence of endoplasmic reticulum (ER) stress in goblet cells, activation of the unfolded protein response, and altered intestinal expression of genes involved in ER stress, inflammation, apoptosis and wound repair. Expression of mutated Muc2 oligomerization domains in vitro demonstrated that aberrant Muc2 oligomerization underlies the ER stress. These models show that mutations in Muc2 oligomerization domains can lead to aberrant assembly of the Muc2 complex leading to ER stress, a depleted mucus barrier and intestinal inflammation. In ulcerative colitis we demonstrate similar accumulation of non-glycosylated MUC2 precursor in goblet cells together with ultrastructural and biochemical evidence of ER stress even in non-inflamed intestinal tissue. Conclusions The observations that mucin misfolding and ER stress lead directly to intestinal inflammation and that ER stress and goblet cell pathology occur in ulcerative colitis suggest that ER stress-related mucin depletion could be a fundamental component of the pathogenesis of colitis. Keywords: Single gene, multiple mutant comparison
2008-03-01 | GSE9913 | GEO
Project description:Mucus/MUC2 from TGM3-deficient mice is less cross-linked with isopeptide-bond cross-links compared to Mucus/MUC2 from WT mice. This results in protease-labile MUC2-molecules that become degraded in the colonic lumen
2022-02-09 | PXD029071 | Pride
Project description:The effects of 6 weeks of wheel running on intestinal microbiome, short-chain fatty acids, and cytokines in wild-type or Muc2 knock-out mice (a model for murine colitis).
| PRJEB40090 | ENA
Project description:Objective: Inflammatory bowel disease (IBD), encompassing ulcerative colitis (UC) and Crohn’s disease (CD), represents a challenging group of chronic gastrointestinal inflammatory disorders. While trained immunity, a form of innate immune memory, has shown promise in combating infection and cancer, its role in chronic inflammatory diseases, particularly inflammatory bowel disease (IBD), remains relatively underexplored. This study aims to investigate the potential of trained immunity to ameliorate IBD. Results: BG induced trained immunity significantly ameliorates DSS-induced colitis. Mechanistically, β-glucan primed the hematopoietic compartment, leading to a profound shift in monocyte fuction. Both bone marrow transplantation from trained donors to naïve recipients and adoptive transfer of trained peripheral monocytes provided protection against DSS colitis. Notably, trained mice displayed enhanced bactericidal activity against intestinal bacterial infections. Furthermore, single-cell RNA sequencing revealed that β-glucan-induced trained immunity resulted in an expansion of reparative Cx3cr1 intestinal macrophages originating from Ly6Chi monocytes, facilitating faster recovery of the colon epithelium. Conclusion: Our findings demonstrate that β-glucan effectively induces trained immunity, leading to a multifaceted protective response against experimental colitis. These findings provide compelling evidence for the therapeutic potential of harnessing trained immunity to treat IBD and offer a novel approach to modulating intestinal inflammation and restoring gut homeostasis。
2025-07-28 | GSE285859 | GEO
Project description:Mucus forms a critical barrier against enteric pathogens like Salmonella enterica serovar Typhimurium. While in vivo studies indicate that secreted, gel-forming mucins and specifically Core 3 glycosylation are protective against S. Typhimurium, the molecular mechanisms involved remain unclear. Here, we measure gene expression changes in Salmonella enterica serovar Typhimurium LT2 following growth in SPI-1 inducing medium (LB + 0.3M NaCl) with or without purified MUC2 (0.1%, w/v), MUC2 glycans (0.1%, w/v), a pool of monosaccharide components comprised of D-galactose, D-GalNAc, D-GlcNAc, D-fuc, and Neu5Ac (0.1%, w/v), or specific individual mucin sugars, namely N-acetyl galactosamine (GalNAc) (0.2%, w/v) and N-acetyl glucosamine (GlcNAc) (0.2%, w/v). Notably, we find MUC2, MUC2 glycans, and to a lesser extent,D-GalNAc and D-GlcNAc downregulate SPI-1 gene expression.
2025-09-25 | GSE278090 | GEO
Project description:Recent exposure to seasonal coronaviruses (sCoVs) may stimulate cross-reactive antibody responses against SARS-CoV-2. Previous studies have shown divergent results regarding protective or damaging immunity induced by prior exposure to sCoVs. It is still unknown whether pre-existing humoral immunity may play a role in the vaccine-induced neutralization and antibody responses. In this study, we collected 36 paired sera in healthy volunteers before and after immunization with inactivated SARS-CoV-2 vaccines, and analyzed the distribution and intensity of pre-existing antibody responses at the epitope level before vaccine immunization, as well as the relationship between pre-existing sCoVs immunity and vaccine-induced neutralization.
2021-10-13 | E-MTAB-11084 | biostudies-arrayexpress