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Characterizing the interactions between a naturally-primed IgA and its conserved Bacteroides thetaiotaomicron species-specific epitope in gnotobiotic mice [RNA-Seq]

ABSTRACT: We report the mid-log phase transcriptional profile of the human gut symbiont Bacteroides thetaiotaomicron, grown in the presence of mouse monoclonal IgAs with species- and strain-level specificity (mAb 260.8 and mAb 225.4, respectively).

ORGANISM(S): Bacteroides thetaiotaomicron

PROVIDER: GSE65449 | GEO | 2015/06/29

SECONDARY ACCESSION(S): PRJNA274030

REPOSITORIES: GEO

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Characterizing the interactions between a naturally-primed IgA and its conserved Bacteroides thetaiotaomicron species-specific epitope in gnotobiotic mice [RNA-Seq]

Project description:We report the mid-log phase transcriptional profile of the human gut symbiont Bacteroides thetaiotaomicron, grown in the presence of mouse monoclonal IgAs with species- and strain-level specificity (mAb 260.8 and mAb 225.4, respectively). mRNA expression profiling of the type strain of Bacteroides thetaiotaomicron (NC_004663) grown in vitro in the presence of either (i) PBS (carrier control), (ii) mAb 225.4 alone, (iii) mAb 260.8 alone, (iv) an equal combination of mAbs 225.4 and 260.8, or (v) a nonbinding control mouse mAb IgA (JC63.1)

2015-06-29 | E-GEOD-65449 | biostudies-arrayexpress

Characterizing the interactions between a naturally-primed IgA (mAb 260.8) and its conserved Bacteroides thetaiotaomicron species-specific epitope in gnotobiotic mice [array]

Project description:Comparisons of gnotobiotic Rag1-/- mice, with and without subcutaneous 260.8 hybridomas, disclosed that this IgA does not affect B. thetaiotaomicron population density or suppress 260.8 epitope production but does affect bacterial gene expression in ways that are emblematic of a diminished host innate immune response. C57BL/6 wildtype, C57BL/6J Rag1-/- , and C57BL/6J Rag1-/- mice harboring the 260.8 IgA producing hybridoma were colonized for 10 days with Bacteroides thetaiotaomicron VPI-5482.

2015-06-29 | E-GEOD-65455 | biostudies-arrayexpress

Characterizing the interactions between a naturally-primed IgA (mAb 260.8) and its conserved Bacteroides thetaiotaomicron species-specific epitope in gnotobiotic mice [array]

2015-06-29 | GSE65455 | GEO

Gene expression of Bacteroides thetaiotaomicron, in vivo with and without IgA 225.4

Project description:Rag1-/- C57BL/6 or Rag1-/- C57BL/6 injected with the IgA producing hybridoma producing 225.4 anti- Bacteroides thetaiotaomicron (Capsular polysaccharide 4 dependent carbohydrate epitope specific epitope) mice were colonized with B. thetaiotaomicron wildtype strain VPI-5482 for 10 days. Cecal bacteria were harvested and snap frozen and RNA isolated. Keywords: Single time point, experimental and control groups.

2007-12-27 | GSE9019 | GEO

Bile-induced biofilm formation in Bacteroides thetaiotaomicron requires magnesium efflux by an RND pump

Project description:The study is about the role of Bacteroides thetaiotaomicron in the human gut microbiota, specifically its ability to form biofilms in response to bile salts. The study found that bile induces the expression of certain efflux pumps, and inhibiting these pumps impairs biofilm formation. Among the induced pumps, the BipABC pump is crucial for biofilm formation as it is involved in the efflux of magnesium, which affects the biofilm's extracellular matrix and structure. This discovery sheds light on how intestinal chemical cues, like bile salts, regulate biofilm formation in B. thetaiotaomicron, a significant gut symbiont.

2024-03-19 | E-MTAB-13460 | biostudies-arrayexpress

Bacteroides thetaiotaomicron OMV proteomics

Project description:Comparative proteomics of Bacteroides thetaiotaomicron samples comparing the total membrane (TM) and outer membrane vesicles (OMV) of WT B. thetaiotaomicron and delta 4364

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Bacteroides thetaiotaomicron ameliorates colon inflammation in preclinical models of Crohn’s Disease [Bacteroides]

Project description:Analysis of the Bacteroides thetaiotaomicron(BT) transcriptome during co-culture with Caco-2 intestinal epithelial cells To identify potential bacterial protein(s) involved in the anti-inflammatory effect of BT in colitis, BT was incubated with Caco-2 human intestinal epithelial cells for 2 hours, and bacterial gene expression was assessed on a Bacteroides thetaiotaomicron VPI-5482 specific microarray. Forty-three BT genes were up-regulated by five-fold or more and of these, twenty genes encoded hypothetical proteins.

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Genome-wide RNA-seq of Bacteroides thetaiotaomicron VPI-5482 with Bacteroides phage challenge

Project description:Purpose: Examining the transcriptome of Bacteroides thetaiotaomicron VPI-5482 challenged with Bacteroides phage to assess surface molecule expression changes Methods: Bacteroides thetaiotaomicron was grown in BPRM in vitro or Germ-Free mice were monocolonized with Bacteroides thetaiotaomicron and gavaged with ARB25 phage. Fold change was calculated as live phage versus heat-killed phage treated samples with n=3 biological replicates. Once cells reached an optical density corresponding to mid-log phase growth (absorbance between 0.4-0.5), RNA was isolated and rRNA depleted. Samples were multiplexed for sequencing on the Illumina HiSeq platform at the University of Michigan Sequencing Core. Data was analyzed using Arraystar software (DNASTAR, Inc.) using DEseq2 normalization with default parameters. Genes with significant up- or down-regulation were determined by the following criteria: genes with an average fold-change >5-fold and with at least 2/3 biological replicates with a normalized expression level >1% of the overall average, and a p-value < 0.05 (t test with Benjamini-Hochberg correction) Results: Specific capsule expression was increased in wild-type B. thetaiotaomicron during phage infection in vitro and in vivo. Many corresponding in vivo genes were upregulated as well as other surface layer proteins.

2020-05-01 | GSE147071 | GEO

Role of OxyR and iron in gene regulation in Bacteroides thetaiotaomicron

Project description:Role of OxyR and iron in gene regulation in Bacteroides thetaiotaomicron

2023-03-30 | GSE169260 | GEO

In vitro transcriptional profiling of Bacteroides thetaiotaomicron in lactose, galactose and human milk oligosaccharides

Project description:Investigation of the overall in vitro response of Bacteroides thetaiotaomicron to human milk oligosaccharides. Comparison with response to MM-lactose and MM-galactose (Analysis performed using as a baseline datasets GSM301635 and GSM301637 corresponding to Bacteroides thetaiotaomicron response in MM-Glucose)

2013-01-01 | GSE26772 | GEO

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