Similar Datasets
Project description:Background: Probiotic-like bacteria treatment has been described to be associated with gut microbiota modifications. Goal: To decipher if the effects of the tested probiotic-like bacteria are due to the bacteria itself or due to the effects of the bacteria on the gut microbiota. Methodology: In this study, gut microbiota has been analyzed from feces samples of subjects with metabolic syndrome and treated with one of the 2 tested probiotic-like bacteria or with the placebo during 3months.
| EGAS00001003585 | EGA
Project description:The dataset is composed of 62 samples (31 subjects before and after probiotic-like bacteria treatment). Sequencing was performed using Illumina HiSeq 2500. Fastq files are provided.
| EGAD00001004944 | EGA
Project description:To understand transcriptional regulation of probiotic bacteria under acidic condition, RNAseq analysis was carried out over different growth conditions
2017-11-29 | GSE107337 | GEO
Project description:Probiotic bacteria may render mice resistant to the development of various inflammatory and infectious diseases. This study aimed to identify underlying mechanisms by which probiotic bacteria may influence intestinal immune homeostasis in non-inflammatory conditions. To this end, we studied the effect of short term (3 days) and long term (28 days) oral administration of VSL#3, a mixture of 8 probiotic bacteria, to healthy BALB/c and C57BL/6 mice, with dominant humoral or cellular immunity, respectively. Long-term treatment with VSL#3 resulted in an increase of B cells and a decrease of CD4+ T cells in the Peyer’s patches (PP) and mesenteric lymph nodes (MLN) of both mouse strains, compared to untreated mice. However, genome wide gene expression profiling using micro-arrays revealed that prolonged administration of VSL#3 to BALB/c and C57BL/6 mice was associated with host-specific modulation of gene expression in colon and small intestine. Whereas VSL#3 treatment resulted in down-regulation of Il13 and Epx, and up-regulation of Il12rb1, Ccr5, Cxcr3 and Cxcl10 in BALB/c mice, such effects were not observed in C57BL/6 mice. In BALB/c mice, a 2-fold increase in CD103+ CD11c+ dendritic cells was found both in PP and in MLN, 18 hours after the first treatment with VSL#3. Prolonged treatment with VSL#3 was associated with increased numbers of Th17 cells and Foxp3+ regulatory T cells in the MLN of these mice. In conclusion, these experiments in healthy mice show that probiotic bacteria may alter the immunological phenotype of the host; the nature of these effects is dependent on mouse strain. In conclusion, these experiments in healthy mice show that probiotic bacteria may alter the immunological phenotype of the host; the nature of these effects is dependent on mouse strain.
2014-10-23 | GSE62619 | GEO
Project description:Probiotic bacteria may render mice resistant to the development of various inflammatory and infectious diseases. This study aimed to identify underlying mechanisms by which probiotic bacteria may influence intestinal immune homeostasis in non-inflammatory conditions. To this end, we studied the effect of short term (3 days) and long term (28 days) oral administration of VSL#3, a mixture of 8 probiotic bacteria, to healthy BALB/c and C57BL/6 mice, with dominant humoral or cellular immunity, respectively. Long-term treatment with VSL#3 resulted in an increase of B cells and a decrease of CD4+ T cells in the Peyer’s patches (PP) and mesenteric lymph nodes (MLN) of both mouse strains, compared to untreated mice. However, genome wide gene expression profiling using micro-arrays revealed that prolonged administration of VSL#3 to BALB/c and C57BL/6 mice was associated with host-specific modulation of gene expression in colon and small intestine. Whereas VSL#3 treatment resulted in down-regulation of Il13 and Epx, and up-regulation of Il12rb1, Ccr5, Cxcr3 and Cxcl10 in BALB/c mice, such effects were not observed in C57BL/6 mice. In BALB/c mice, a 2-fold increase in CD103+ CD11c+ dendritic cells was found both in PP and in MLN, 18 hours after the first treatment with VSL#3. Prolonged treatment with VSL#3 was associated with increased numbers of Th17 cells and Foxp3+ regulatory T cells in the MLN of these mice. In conclusion, these experiments in healthy mice show that probiotic bacteria may alter the immunological phenotype of the host; the nature of these effects is dependent on mouse strain. In conclusion, these experiments in healthy mice show that probiotic bacteria may alter the immunological phenotype of the host; the nature of these effects is dependent on mouse strain. 40 samples (4 experimental groups, 5 biological replicates), performed in two inbred mice strains
2014-10-23 | E-GEOD-62619 | biostudies-arrayexpress
Project description:The hypothesis of this research was that probiotic bacteria that increase intestinal barrier function achieve this, partly, by increasing the expression of the genes involved in tight junction signalling in healthy intestinal epithelial cells. L. plantarum MB452 isolated from the probiotic product VSL#3 was chosen as the test bacterium because it has a robust, repeatable, positive effect tight junction integrity, as measured by the trans-epithelial electrical resistance (TEER) in vitro.
2009-10-07 | GSE18372 | GEO
Project description:This data set contains bacteria isolated from corals. The bacteria were cultured and tested in a biological assay against pathogenic bacteria that may be involved in Stony Coral Tissue Loss Disease. The bacteria in this data set include pathogenic and potentially probiotic bacteria.
2022-01-28 | MSV000088745 | MassIVE
Project description:Escherichia coli Nissle 1917 (EcN) is a probiotic used for treatment of intestinal disorders. EcN improves gastrointestinal homeostasis and microbiota balance; however little is known about how this probiotic delivers effector molecules to the host. Outer membrane vesicles (OMVs) are constitutively produced by gram-negative bacteria and have a relevant role in bacteria-host interactions. Here we performed proteomic analysis of EcN OMVs. Using 1D SDSD-PAGE and highly sensitive LC-MS/MS analysis we identified 192 EcN vesicular proteins with high confidence in three independent experiments. Of these proteins, 18 were encoded by strain-linked genes and 57 were common to pathogen-derived OMVs. These proteins may contribute to the ability of this probiotic to colonize the human gut as they fulfil functions related to adhesion to host tissues, immune modulation or bacterial survival in host niches. This study describes the first global OMV proteome of a probiotic strain and provides evidence that probiotic-derived OMVs contain proteins that can target these vesicles to the host and mediate their beneficial effects on intestinal function.
2013-12-19 | PXD000367 | Pride
Project description:A popular strategy for enhancing the antibacterial properties of probiotic bacteria is to retrofit them with the ability to overproduce heterologous bacteriocins. This is often achieved from strong, non-native promoters. How the dysregulated overproduction of heterologous bacteriocins affects the fitness and antibacterial efficacy of the retrofitted probiotic bacteria is often overlooked. We conferred the prototypical probiotic Escherichia coli strain Nissle (EcN) the ability to produce different amounts of the bacteriocin microcin C (McC). Expression of the bacteriocin synthesis genes was driven from the native promoter (Pmcc-WT), or from promoters manipulated to be stronger (Pmcc-High) and weaker (Pmcc-Low) than the WT, in a plasmid-based system. Pmcc-Low and Pmcc-High retained their native regulation. A strain harbouring a non-functional promoter (Pmcc-Mut) produces no McC and was used as a control. Each strain was grown to early stationary phase, when production of McC starts, in Luria-Bertani broth at 37 degrees. The RNA was isolated and the effects of different levels of production of McC on the transcriptome of EcN was examined by RNA-Seq.
2023-06-30 | E-MTAB-13078 | biostudies-arrayexpress
Project description:We used a whole genome array containing 97.4 % of the annotated genes of Lactobacillus acidophilus NCFM, a probiotic culture that belongs to the lactic acid bacteria group, to identify genes that are differentially expressed under several stress conditions. Keywords: Stress response
2005-12-08 | GSE2782 | GEO