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Osmotic stress in Listeria monocytogenes serotype 4b strain F2365 grown in BHI medium and BHI medium with 1.2% NaCl

ABSTRACT: Gene expression profiles of L. monocytogenes strain F2365 to osmotic stress was examined. Based on a log2 scale, four and 24 genes were upregulated and downregulated by the stress, respectively.The expression level of ATP-binding cassette superfamily and ribosomal protein L2 genes were increased, whereas genes associated with PTS system, its metabolic enzymes, pathogenesis, and hypothetical protein were downregulated.

ORGANISM(S): Listeria monocytogenes

PROVIDER: GSE19570 | GEO | 2010/01/15

SECONDARY ACCESSION(S): PRJNA122461

REPOSITORIES: GEO

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Osmotic stress in Listeria monocytogenes serotype 4b strain F2365 grown in BHI medium and BHI medium with 1.2% NaCl

Project description:Gene expression profiles of L. monocytogenes strain F2365 to osmotic stress was examined. Based on a log2 scale, four and 24 genes were upregulated and downregulated by the stress, respectively.The expression level of ATP-binding cassette superfamily and ribosomal protein L2 genes were increased, whereas genes associated with PTS system, its metabolic enzymes, pathogenesis, and hypothetical protein were downregulated. To examine the gene expression profiles of L. monocytogenes grown in the medium added with or without 1.2% NaCl , L. monocytogenes strains 4b F2365 aminosilane-coated cDNA microarray slide was used. Cy3 and Cy5 dyes were used for cDNA labelling. Data were obtained from three biological and four technical replicates (n = 12). Each biological replicate included a flip dye assay.

2010-05-15 | E-GEOD-19570 | biostudies-arrayexpress

Induction of virulence genes in Listeria monocytogenes serotype 4b upon exposure to concentrations of biocides

Project description:Study on genome-wide expression in L.monocytogenes str4b F2365 exposed to five different biocides at three different concentrations

2010-11-27 | GSE16336 | GEO

Induction of virulence genes in Listeria monocytogenes serotype 4b upon exposure to concentrations of biocides

Project description:Study on genome-wide expression in L.monocytogenes str4b F2365 exposed to five different biocides at three different concentrations The study was carried out with a total of 34 microarrays using total RNA recovered from L.monocytogenes str4b F2365, which has been exposed for 1 hour (t =1) to five different biocides at three different concentrations (sub-inhibitory as well as inhibitory) in two-fold (30 exps). As reference samples, RNA of untreated cells were used in two-fold directly after pre-culturing (t=0) and after one hour of preculturing (t=1 hour; 4 exps). Each microarray read out includes expression levels of 2,821 genes from L.monocytogenes str4b F2365in two-fold, with a total of twelve 60-mer probe pairs (PM/MM) per gene.

2010-11-27 | E-GEOD-16336 | biostudies-arrayexpress

Listeria monocytogenes EGD after growth BHI vs. LB vs. MM

Project description:Transcriptional profile of prfA, the dependent genes and the PTS genes after growth in BHI (brain-heart-infusion), LB (Luria Bertani broth) and MM (minimal medium (Premaratne et al. 2001) (each supplemented with 50 mM Glucose). Keywords: media comparison

2008-12-01 | GSE12143 | GEO

Listeria monocytogenes EGD after growth BHI vs. LB vs. MM

2008-11-30 | E-GEOD-12143 | biostudies-arrayexpress

Genome Sequence of Listeria monocytogenes Strain F4244, a 4b Serotype.

Project description: Not available

| S-EPMC5721137 | biostudies-literature

Genomic characterization of novel Listeria monocytogenes serotype 4b variant strains.

Project description: Not available

| S-EPMC3929640 | biostudies-literature

Atypical Listeria monocytogenes serotype 4b strains harboring a lineage II-specific gene cassette.

Project description: Not available

| S-EPMC3264116 | biostudies-literature

Arbuscular mycorrhizal symbiosis and osmotic adjustment in response to NaCl stress: a meta-analysis.

Project description: Not available

| S-EPMC4201091 | biostudies-literature

Listeria monocytogenes strain F2365 has reduced ability to survive stress while maintaining virulence characteristics

Project description:Listeria monocytogenes strain F2365 was the first strain representative of serotype 4b (lineage I) to be sequenced in 2004, suggesting it could become the model organism for this serotype, which is associated with most human outbreaks of listeriosis worldwide to date. F2365 itself is an outbreak strain involved in the Mexican-style soft cheese outbreak in California in 1985. In this study we show through phenotypic and transcriptomic analysis that L. monocytogenes strain F2365 has reduced ability to respond to stress due to the absence of a functional σB-dependent stress response system. F2365 shows no B-dependent ability to survive acid or oxidative stress nor B-dependent ability to infect Caco-2 epithelial cell in vitro or guinea pigs in vivo. Therefore, there is substantial evidence that F2365 is an atypical strain and is not a suitable representative of outbreak-associated serotype 4b strains.

2013-06-01 | GSE42730 | GEO

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