Salmonella Typhimurium evades macrophage defense by derailing metabolic pathways
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ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE84375 | GEO | 2020/07/15
REPOSITORIES: GEO
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Project description:The host response to S.typhimurium infections in ileum was studied after infection of piglets. mRNA and miRNA expression studies were performed to identify interactions of miRNAs and regulated mRNAs in context of mammalian intestinal Salmonella infection using a piglet model. Intestinal samples (~ 2 cm circle segments) were taken at time points 3h, 3d and 28d post infection from ileum of ten S.typhimurium infected piglets (S), ten S.typhimurium infected piglets and additional treated with probiotic strain E.faecium NCIMB 10415 (SP) and five healthy control piglets(C) (EUROC x Pietrain). The piglets were weaned at the age of 28 days and infected with S. typhimurium. Samples were quick-frozen in liquid nitrogen and stored at -80 M-BM-0C. In order to obtain representative measurements in each intestinal locus, three cross sections of approximately 2 mm out of the 2 cm segment of frozen intestine were examined. These 3 sections were pooled and total RNA was isolated from samples using an automated homogenizer (FastPrep Instrument, MP Biomedicals, Heidelberg, Germany) and the mirVana miRNA Isolation Kit (Applied Biosystems, Darmstadt, Germany), according to the manufacturerM-bM-^@M-^Ys protocol. The RNA quality and quantity of all samples were proven using the Agilent 2100 Bioanalyzer and the RNA 6000 Nano Kits (Agilent, Waldbronn, Germany) and the Nanodrop 1000 Spectrophotometer (Thermo Scientific, MA, USA). For microarray analysis pooled samples of each experimental group were prepared ana partes aequalis from individually isolated total RNA samples, which werde collected at the same time point in each group. Common reference was designed from equal amounts of total RNA of each pool and additional total RNA from ascending colon.
2013-06-25 | E-GEOD-40803 | biostudies-arrayexpress
Project description:The host response to S.typhimurium infections in ileum was studied after infection of piglets. mRNA and miRNA expression studies were performed to identify interactions of miRNAs and regulated mRNAs in context of mammalian intestinal Salmonella infection using a piglet model. Intestinal samples (~ 2 cm circle segments) were taken at time points 3h, 3d and 28d post infection from ileum of ten S.typhimurium infected piglets (S), ten S.typhimurium infected piglets and additional treated with probiotic strain E.faecium NCIMB 10415 (SP) and five healthy control piglets(C) (EUROC x Pietrain). The piglets were weaned at the age of 28 days and infected with S. typhimurium. Samples were quick-frozen in liquid nitrogen and stored at -80 M-BM-0C. In order to obtain representative measurements in each intestinal locus, three cross sections of approximately 2 mm out of the 2 cm segment of frozen intestine were examined. These 3 sections were pooled and total RNA was isolated from samples using an automated homogenizer (FastPrep Instrument, MP Biomedicals, Heidelberg, Germany) and the mirVana miRNA Isolation Kit (Applied Biosystems, Darmstadt, Germany), according to the manufacturerM-bM-^@M-^Ys protocol. The RNA quality and quantity of all samples were proven using the Agilent 2100 Bioanalyzer and the RNA 6000 Nano Kits (Agilent, Waldbronn, Germany) and the Nanodrop 1000 Spectrophotometer (Thermo Scientific, MA, USA). For microarray analysis pooled samples of each experimental group were prepared ana partes aequalis from individually isolated total RNA samples, which were collected at the same time point in each group. Common reference was designed from equal amounts of total RNA of each pool and additional total RNA from ascending colon.
2013-06-25 | E-GEOD-40804 | biostudies-arrayexpress
Project description:Salmonella enterica serotype Typhimurium produces a variety of fimbrial appendages, among which the type 1 fimbriae is the most common type. In vitro static broth culture favors S. Typhimurium to produce type 1 fimbriae, while solid agar inhibits its expression. A transposon inserted in the stbC gene, which would encode an usher protein for Stb fimbriae of a non-flagellar S. Typhimurium LB5010 strain, conferred it to agglutinate yeast cells on both cultures, and was mannose-sensitive. Reverse transcription polymerase chain reaction (RT-PCR) revealed that the expression of the fimbrial major subunit gene fimA, and fimZ, a positive regulator gene of fimA, were both increased in the stbC mutant strain when grown on LB agar; fimW, a repressor gene of fimA, exhibited lower expression. Flagella were observed in the stbC mutant and this phenotype was correlated with the motile phenotype detected by MSRV agar medium and reaction with flagella antiserum. Microarray data and RT-PCR also indicated that the expression of three genes, motA, motB, and cheM, was enhanced in the stbC mutant. The S. Typhimurium stbC mutant was resistant to a variety of antibiotics, consistent with the finding that expression of yhcQ and ramA, two genes involved in multidrug resistance, was enhanced. A complementation test revealed that transforming a recombinant plasmid possessing the coding sequence of the stbC gene restored the mannose-sensitive agglutination phenotype to the stbC mutant much as that in the parental S. Typhimurium LB5010 strain, indicating the possibility of an interplay of different fimbrial systems in coordinating their expression. Key Words: Salmonella enterica serotype Typhimurium, fimbriae, type 1 fimbriae, stbC, transposon, multidrug resistant, flagella
2011-12-25 | GSE34685 | GEO
Project description:We describe how searching chimeric spectra with post-processing including MS²PIP-derived features aids the identification of hypothetical and unannotated proteins. We apply our workflow to the well-characterized human bacterial pathogen Salmonella enterica serovar Typhimurium (S. Typhimurium) and validate novel protein-coding regions with by ribo-seq translation evidence. We further elaborate how riboproteogenomics is instrumental for reannotating ORFs and the discovery of novel ORFs across bacteria.
2020-10-13 | PXD016377 | Pride
Project description:The host response to S.typhimurium infections in ileum was studied after infection of piglets. mRNA and miRNA expression studies were performed to identify interactions of miRNAs and regulated mRNAs in context of mammalian intestinal Salmonella infection using a piglet model.
2013-06-25 | GSE40804 | GEO
Project description:The host response to S.typhimurium infections in ileum was studied after infection of piglets. mRNA and miRNA expression studies were performed to identify interactions of miRNAs and regulated mRNAs in context of mammalian intestinal Salmonella infection using a piglet model.
2013-06-25 | GSE40803 | GEO
Project description:Comparison of RiboPools and RiboZero rRNA depletion strategies in total RNA from Salmonella Typhimurium, strain SL1344
2019-12-10 | GSE132630 | GEO
Project description:Salmonella enterica serovar Typhimurium produces type 1 fimbriae on the outer membrane and such hair-like appendages is proposed to play a significant role in the attachment of the bacteria to host cells and tissues. S. Typhimurium cultured in static broth favors expression of type 1 fimbriae. Conversely, solid agar medium represses type 1 fimbrial expression. Production of type 1 fimbriae is cooperatively regulated by fimZ, fimY, stm0551, fimW, and fimU within the fim gene cluster. FimZ belongs to the response regulator of the two-component regulatory system in bacteria and functions as a DNA binding protein. FimZ can bind to the promoter of the fimbrial major subunit gene fimA to activate its expression and produce type 1 fimbriae. A fimZ mutant in LB5010 strain constructed by allelic exchange was found to be non-fimbriate. Total RNA was extracted from the parental LB5010 and the fimZ mutant strain cultured in static broth and analyzed by hybridization to a S. Typhimurium LT2 DNA microarray. Transcriptomic analysis indicated that the stress response related gene cpxP, soxS and type 1 fimbriae related genes were down-regulated, whereas plasmid-encoded fimbriae, flagella associated genes and virulence genes like virK and mgtC were up-regulated in the fimZ mutant strain. It is possible that FimZ protein may play a role to interact with other genes besides fim genes. Mechanisms of this crosstalk warrant further elucidation.
2017-01-20 | GSE93882 | GEO
Project description:Transcriptional profiling of log and stationary phases of S. Typhimurium, comparing untreated controls with cortisol-treated samples.
2011-07-26 | GSE30923 | GEO
Project description:Knockout mice were generated that harbour a mutation in the gene encoding gastric intrinsic factor (GIF) a transporter protein necessary for the absorption of vitamin B12/cobalamin (Cbl) from the intestine. The levels of Cbl in the blood of these gif-/- mice exibited a maternal influence dependent on whether they were bred from heterozygous (high Cbl) or homozygous (low Cbl) mothers and this correlated with their susceptibility to infection challenge with Salmonella enterica Serovar Typhimurium (S.Typhimurium). Microarrray analysis was conducted on total messenger RNA (mRNA) extracted fron the homzygous-bred gif-/- and wild-type mice with the aim to identify any abnormal genomic expression patterns.
2014-09-10 | E-MTAB-1879 | biostudies-arrayexpress