Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

RNAseq analysis reveals the transcriptional programme of Clostridium difficile in a biologically relevant faecal–stress environment: implications for pathogenicity

ABSTRACT: RNAseq analysis reveals the transcriptional programme of Clostridium difficile in a biologically relevant faecal–stress environment: implications for pathogenicity

PROVIDER: PRJNA445971 | ENA |

REPOSITORIES: ENA

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
	SRR6908140_1.fastq.gz	Fastqsanger.gz
	SRR6908140_2.fastq.gz	Fastqsanger.gz
	SRR6908141_1.fastq.gz	Fastqsanger.gz
	SRR6908141_2.fastq.gz	Fastqsanger.gz
	SRR6908142_1.fastq.gz	Fastqsanger.gz

Items per page:

1 - 5 of 12

Similar Datasets

RNAseq analysis reveals the transcriptional programme of Clostridium difficile in a biologically relevant faecal–stress environment: implications for pathogenicity

Project description:RNAseq and LC/MS metabolomics analysis of C. difficile strain 630 grown in BHIS media with 50% (vol/vol) faecal water added, compared with control BHIS containing only the additional PBS used for prep of Faecal water. Cells grown in biological triplicates to late log phase (T=6h) prior to harvest. Goal was to determine changes in gene expression caused by exposure to Faecal water, and changes in the metabolite profile of faecal water containing medium when incubated with actively growing C. difficile cells

2018-11-12 | GSE112422 | GEO

Increased sporulation underpins adaptation of Clostridium difficile strain 630 to a biologically-relevant faecal environment, with implications for pathogenicity.

Project description:Clostridium difficile virulence is driven primarily by the processes of toxinogenesis and sporulation, however many in vitro experimental systems for studying C. difficile physiology have arguably limited relevance to the human colonic environment. We therefore created a more physiologically-relevant model of the colonic milieu to study gut pathogen biology, incorporating human faecal water (FW) into growth media and assessing the physiological effects of this on C. difficile strain 630. We identified a novel set of C. difficile-derived metabolites in culture supernatants, including hexanoyl- and pentanoyl-amino acid derivatives by LC-MSn. Growth of C. difficile strain 630 in FW media resulted in increased cell length without altering growth rate and RNA sequencing identified 889 transcripts as differentially expressed (p?<?0.001). Significantly, up to 300-fold increases in the expression of sporulation-associated genes were observed in FW media-grown cells, along with reductions in motility and toxin genes' expression. Moreover, the expression of classical stress-response genes did not change, showing that C. difficile is well-adapted to this faecal milieu. Using our novel approach we have shown that interaction with FW causes fundamental changes in C. difficile biology that will lead to increased disease transmissibility.

| S-EPMC6232153 | biostudies-literature

The host response of IBS patients to allogenic and autologous faecal microbiota transfer

Project description:In this randomised placebo-controlled trial, irritable bowel syndrome (IBS) patients were treated with faecal material from a healthy donor (n=8, allogenic FMT) or with their own faecal microbiota (n=8, autologous FMT). The faecal transplant was administered by whole colonoscopy into the caecum (30 g of stool in 150 ml sterile saline). Two weeks before the FMT (baseline) as well as two and eight weeks after the FMT, the participants underwent a sigmoidoscopy, and biopsies were collected at a standardised location (20-25 cm from the anal verge at the crossing with the arteria iliaca communis) from an uncleansed sigmoid. In patients treated with allogenic FMT, predominantly immune response-related genes sets were induced, with the strongest response two weeks after FMT. In patients treated with autologous FMT, predominantly metabolism-related gene sets were affected.

2019-10-14 | GSE138297 | GEO

Dnmt2-dependent methylomes lack biologically relevant DNA methylation patterns [Drosophila melanogaster]

Project description:Dnmt2 is a widely conserved protein, which is closely related to eukaryotic DNA methyltransferases. However, Dnmt2 shows a robust tRNA methyltransferase activity and only limited activity towards DNA. Interestingly, a recent study has provided evidence for a biologically important function of Dnmt2-dependent DNA methylation in the blood fluke Schistosoma mansoni, which seemed to contradict the weak activity of the enzyme in other organisms. We now used whole-genome bisulfite sequencing to comprehensively analyze the methylome of adult worms and could not detect any evidence for biologically relevant DNA methylation patterns. We also characterized the methylome of Drosophila melanogaster embryos and did not find any evidence for DNA methylation. Unconverted cytosine residues were detectable only at very low levels and shared many attributes with bisulfite deamination artifacts. Our results thus strongly argue against a DNA methyltransferase activity of Dnmt2 and suggest that Dnmt2-dependent phenotypes are caused by reduced tRNA methylation.

2013-05-06 | GSE39996 | GEO

Dnmt2-dependent methylomes lack biologically relevant DNA methylation patterns [Schistosoma mansoni]

2013-05-06 | GSE39997 | GEO

Integrated Genomics Approach to Identify Biologically Relevant Alterations in Fewer Samples.

Project description:Integrated Genomics Approach to Identify Biologically Relevant Alterations in Fewer Samples.

| PRJEB11386 | ENA

Integrated Genomics Approach to Identify Biologically Relevant Alterations in Fewer Samples.

Project description:Integrated Genomics Approach to Identify Biologically Relevant Alterations in Fewer Samples.

| PRJEB11800 | ENA

Dnmt2-dependent methylomes lack biologically relevant DNA methylation patterns

Project description:Several organisms belonging to diverse animal groups have retained Dnmt2 as their only bona fide DNA methyltransferase gene. However, recent studies have shown that Dnmt2 functions as a tRNA methyltransferase, which prompted us to analyze the methylomes of Dnmt2-only organisms at single-base resolution. Using whole-genome bisulfite sequencing we show here that the genomes of Schistosoma mansoni and Drosophila melanogaster lack detectable DNA methylation patterns. Residual unconverted cytosine residues shared many attributes with bisulfite deamination artifacts and were observed at comparable levels in a Dnmt2-deficient fly strain. Furthermore, genetically modified mouse embryonic stem cells that had retained Dnmt2 as their only bona fide DNA methyltransferase gene, did not show any detectable DNA methylation patterns. Our results thus uncover fundamental differences among animal methylomes and suggest that Dnmt2-only organisms lack biologically relevant DNA methylation patterns.

2013-05-06 | GSE42170 | GEO

Dnmt2-dependent methylomes lack biologically relevant DNA methylation patterns [Schistosoma mansoni]

2013-05-06 | E-GEOD-39997 | biostudies-arrayexpress

Dnmt2-dependent methylomes lack biologically relevant DNA methylation patterns [Drosophila melanogaster]

2013-05-06 | E-GEOD-39996 | biostudies-arrayexpress