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Transcriptional profiling of murine small intestine in conventional or SPF housing conditions

ABSTRACT: We studied the influence of the microbiota on intestinal homeostasis and tumor development after loss of the intestinal tumor phenotype in Msh2-Lynch mice upon rederivation of the mouse line in an SPF facility. We generated RNA seq data from total RNA of small intestine (jejunum) derived from either conventional or SPF mice.

ORGANISM(S): Mus musculus

PROVIDER: GSE171996 | GEO | 2022/02/08

REPOSITORIES: GEO

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Augmented murine hematopoietic stem and progenitor cell reconstruction through conventional co-housing

Project description:Background and methods: The effects of microbiota toward hematopoietic stem and progenitor cells (HSPCs) were very much complicated based on previous reports. In the current study, normal inbred C57BL6 (B6) mice from the Jackson Laboratory were maintained in the SPF environment for three weeks. Baseline complete blood counts were normal, and animals were then separated into two groups: 1) SPF mice stayed in the SPF facility, and 2) SPF mice being transferred to a conventional facility for co-housing (CVT). At one month of co-housing, we bled and euthanized animals, sorted lineage-CD117+ cells from bone marrow of SPF and CVT mice respectively, and performed single cell RNA sequencing on sorted hematopoietic stem and progenitor cells using 10XGenomics Chromium Single Cell 3' Solution and sequenced with Illumina HiSeq 3000 Systems. Results: We characterized heterogeneity of HSPCs, defined differential gene expression and performed pathway analysis. Proportion of LTHSC was lower and the proportion of GMP was higher from CVT mice than those from SPF mice. Pathway analyses of differentially-expressed genes in HSPCs we found down-regulation of genes related to immune responses and cell proliferation and activation, and up-regulation of genes associated with cellular metabolism, including protein, ribosome, and energy metabolic processes, in cells from CVT mice. Conclusion: Observations from our study demonstrated a positive effect in co-housed CVT mice that promotes HSPC reconstitution through modulation of molecular elements involving multiple signaling pathways.

2020-10-02 | GSE142235 | GEO

Msh2-Lynch

Project description:Msh2-Lynch

| PRJEB45308 | ENA

Transcriptional profiling of murine small intestine in conventional or SPF housing conditions

Project description:Transcriptional profiling of murine small intestine in conventional or SPF housing conditions

| PRJNA721667 | ENA

Comparing Gut Microbial Composition and Functional Adaptations between SPF and Non-SPF pigs

Project description:The gut microbiota is closely associated with digestion, metabolism, immunity, and host health. The imbalance of the microbial community in livestock directly affects their well-being and, consequently, productivity. The composition and diversity of the gut microbiota are influenced not only by host genetics but also by environmental factors such as the microbial complexity of the rearing environment, feeds, and antibiotics. Here, we focus on the comparison of gut microbial communities in miniature pigs developed for xenotransplantation in specific pathogen-free (SPF) and conventional (non-SPF) facilities. To identify the disparities in gut microbial composition and functionality between these two environments, 16S RNA metagenome sequencing was conducted using fecal samples. The results revealed that the non-SPF pigs had higher gut microbiota diversity than the SPF pigs. The genera Streptococcus and Ruminococcus were more abundant in SPF pigs than in non-SPF pigs. Blautia, Bacteroides, and Roseburia were exclusively observed in SPF pigs, whereas Prevotella was exclusively found in non-SPF pigs. Carbohydrate and nucleotide metabolism, as well as environmental information processing, were predicted to be enriched in SPF pigs. In addition, energy and lipid metabolism, along with processes related to genetic information, cellular communication, and diseases, were predicted to be enriched in non-SPF pigs. This study makes an important contribution to elucidating the impact of environments harboring a variety of microorganisms, including pathogens, on the gut microbiota of miniature pigs. Furthermore, we sought to provide foundational data on the characteristics of the gut microbiota in genetically modified pigs, which serve as source animals for xenotransplantation.

2024-04-22 | GSE264183 | GEO

RNA-sequencing of primary intestinal epithelial cells from wild-type mice

Project description:This dataset consists of RNA-sequencing of isolated mouse intestinal epithelial cells. Intestinal epithelial cells were isolated from C57BL/6 wild-type mice in our SPF facility at 4 weeks and 8 weeks of age. The goal of this study was to understand the patterns of gene expression in these cells under homeostatic conditions.

2018-08-28 | GSE117520 | GEO

Gene Expression Profiling of Mismatch Repair Deficient Intestinal Stem Cells

Project description:We have generated a gene signature of mismatch repair (MMR) deficient intestinal stem cells (ISCs) using whole-genome transcriptomics and proteomics from murine intestinal stem cells and epithelial non-stem cells in a Lynch syndrome mouse model (Msh2-fl/fl;Villin-Cre). Then we have validated this signature in RNA-seq data from LS normal unaffected mucosa (UM), adenomas (AD) and adenomas with high-grade dsyplasia (AD-HGD) and tumors (T). MMR status for LS tumors and adenomas with high-grade dysplasia was categorized as KO, for unaffected mucosa as HET and FAP samples as WT.

2021-06-01 | GSE153385 | GEO

Transcriptional Modulation of Genes by Gut Microbiota in Germfree and Conventional Mice

Project description:To characterize the effect of microbiota on global gene expression in the distal small intestine during postnatal gut development we employed mouse models with experimental colonization by intestinal microbiota. Using microarray analysis to assess global gene expression in ileal mucosa at the critical stage of intestinal development /maturation associated with weaning, and asking how expression is affected by microbial colonization In the study presented here, preweaned and postweaned GF, SPF mouse small intestinal total RNAs were used. Also, 3-week-old gnotobiotic mouse as well as GF mouse small intestinal RNAs were used.

2013-03-02 | E-GEOD-44788 | biostudies-arrayexpress

The MLH1 c.-27C>A and c.85G>T variants are borne on a European ancestral haplotype which underlies an autosomal dominant form of MLH1 epimutation.

Project description:Lynch syndrome, caused by germline heterozygous mutations of the DNA mismatch repair genes MLH1, MSH2, MSH6 and PMS2, or deletions affecting the EPCAM gene upstream of MSH2, is characterized by a predisposition to early-onset colorectal and additional extracolonic cancers. An alternative but rare cause of Lynch syndrome is a constitutional epimutation of MLH1, which is characterized by promoter methylation and transcriptional silencing of a single allele in normal tissues. Worldwide, five families with autosomal dominant transmission of a constitutional MLH1 epimutation linked to an MLH1 haplotype with two single nucleotide variants (c.-27C>A and c.85G>T) have been identified. Array-based genotyping using Affymetrix SNP 6.0 data in four of these families revealed a shared haplotype extending across a ≤2.6 Mb region of chromosome 3p22 encompassing MLH1 and additional flanking genes, indicating common ancestry. Genomic DNA from 5 carriers of the c.-27C>A and c.85G>T variants was hybridized on Affymetrix SNP6.0 array according to manufacturer's procedures

2013-04-01 | E-GEOD-45149 | biostudies-arrayexpress

RNA-seq mouse intestines from PN, Germ-free, SPF and Antibiotics-treated mice

Project description:We hypothesized that there were genes involved in the maintenance of intestinal tolerance to commensal bacteria. These genes should meet the following criteria: expressed in intestines, upregulated in the presence of commensal bacteria and downregulated in absence of microbes. To find these genes, we collected small intestines from postnatal mice that neither affected by the bacteria nor by the food, adult mice bred in germ-free or specific pathogen-free conditions, and adult SPF mice treated with antibiotics. We therefore performed bulk RNA sequencing using these cells.

2023-01-01 | E-MTAB-12215 | biostudies-arrayexpress

Comparison of conventional and germ-free gastrointestinal tract

Project description:Whole tissues corresponding to the corpus, jejunum, descending colon and rectum were dissected from each mouse, washed with ice-cold PBS, placed into 2ml of RNA-later and flash-frozen in liquid nitrogen. The corpus was defined as the part of the stomach different from the antrum (distinguished by a difference in colour). The jejunum was defined as the tissue between the first 4 cm and the last 2 cm of the small intestinal tube. The descending colon and the rectum were defined as the last 3 cm of the digestive tube, where the first 2 cm was the descending colon and the last centimetre was the rectum. Keywords: other

2004-06-24 | GSE1392 | GEO

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