Browse
Submit Data
Databases
API
Help

Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

40 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Cholesterol's effect on M. tuberculosis

ABSTRACT: 2 experiments: (1) Mtb, Tween vs Cholesterol at 3 & 24hrs (2) CDC1551 vs kstR mutant of CDC1551, with and w/o Cholesterol In triplicate, dye flips included.

ORGANISM(S): Mycobacterium tuberculosis

SUBMITTER: Eugenie Dubnau

PROVIDER: E-GEOD-13978 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

ACCESS DATA

Json Xml

Publications

A thiolase of Mycobacterium tuberculosis is required for virulence and production of androstenedione and androstadienedione from cholesterol.

Nesbitt Natasha M NM Yang Xinxin X Fontán Patricia P Kolesnikova Irina I Smith Issar I Sampson Nicole S NS Dubnau Eugenie E

Infection and immunity 20091012 1

Mycobacterium tuberculosis, the causative agent of tuberculosis, is an intracellular pathogen that shifts to a lipid-based metabolism in the host. Moreover, metabolism of the host lipid cholesterol plays an important role in M. tuberculosis infection. We used transcriptional profiling to identify genes transcriptionally regulated by cholesterol and KstR (Rv3574), a TetR-like repressor. The fadA5 (Rv3546) gene, annotated as a lipid-metabolizing thiolase, the expression of which is upregulated by ...[more]

PMID: 19822655

Similar Datasets

The response of Mycobacterium tuberculosis to reactive oxygen and nitrogen species

Project description:The bacteriostatic and bactericidal effects and the corresponding expression profiles of Mycobacterium tuberculosis to representative oxidative and nitrosative stresses were investigated by growth and survival studies and whole genome expression analysis. The response of M. tuberculosis to a range of hydrogen peroxide (H2O2) concentrations tended to fall into three distinct categories: (1) low level exposure resulted in induction of few H2O2 sensitive genes, (2) intermediate exposure resulted in massive transcriptional changes without an effect on growth or survival, and (3) high exposure resulted in a muted transcriptional response and eventual death. Nitric oxide (NO) exposure initiated much of the same transcriptional response as H2O2. However, unlike H2O2 exposure, NO exposure affected a dose-dependent bacteriostatic activity without killing and induction of dormancy-related genes. Included in the shared response to H2O2 and NO was the induction of genes encoding oxidative stress detoxification and iron-sulfur cluster repair functions. Expression of several key oxidative stress defense genes was constitutive, or increased moderately from an already elevated level, suggesting bacilli that are continually primed for oxidative stress defense. Deletion of the known oxidative stress responsive regulator, FurA, resulted in the constitutive expression of furA, katG, and Rv1907c; while other genes do not appear to be solely controlled by FurA. In contrast to Escherichia coli, M. tuberculosis appears highly resistant to DNA damage-dependent killing caused by low mill molar levels of H2O2. Furthermore, instead of limiting access to iron to prevent hydroxyl radical formation from H2O2 and thus DNA damage, M. tuberculosis induced iron uptake genes in response to H2O2 and NO. Set of arrays that are part of repeated experiments Compound Based Treatment: H2O2 or DETA/NO treatment

2010-05-18 | E-GEOD-16146 | biostudies-arrayexpress

Oxadiazolone derivatives against M. tuberculosis

Project description:Oxadiazolone (OX) derivatives have been investigated for their antimycobacterial activity against three pathogenic slow-growing mycobacteria: Mycobacterium marinum, Mycobacterium bovis BCG and the avirulent Mycobacterium tuberculosis (M. tb) mc26230. The encouraging MIC values obtained prompted us to test them against virulent M. tb H37Rv growth either in broth medium or inside macrophages. The OX compounds displayed a diversity of action and were found to act either on extracellular M. tb growth only with moderated MIC, or both intracellularly on infected macrophages as well as extracellularly on bacterial growth. One OX derivatives, HPOX, was selected and used in a competitive labelling/enrichment assay against the activity-based probe Desthiobiotin-FP in order to identify its putative target(s). This approach, combined with mass spectrometry, identified 18 potential candidates, all being serine or cysteine enzymes involved in M. tb lipid metabolism and/or in cell wall biosynthesis. Among them, Ag85A, CaeA, TesA, KasA and MetA have been reported as essential for in vitro growth of M. tb and/or its survival and persistence inside macrophages. Overall, our findings support the assumption that OX derivatives may represent a novel class of multi-target inhibitors leading to the arrest of M. tb growth through a cumulative inhibition of a large number of Ser- and Cys-containing enzymes involved in various important physiological processes.

2018-09-25 | PXD010255 | Pride

Mycobacterium tuberculosis gene expression in response to thioridazine (THZ)

Project description:The gene expression profiles of Mtb after treatment at the minimal inhibitory concentration (MIC) or 4 X MIC at an early stage (up to 6 hours) was compared to untreated Mtb. Our experiment is designed to in order to ensure that the primary effects (0-6h) of the drugs and any dose (1X MIC and 4X MIC) responses would be captured.

2010-05-16 | E-GEOD-16626 | biostudies-arrayexpress

Transcriptional profile of pathogenic and non-pathogenic in vitro generated mycobacterial cell wall deficient forms

Project description:This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

2012-11-29 | E-GEOD-32237 | biostudies-arrayexpress

DosR-regulon genes induction in Mycobacterium bovis BCG under aerobic conditions

Project description:In this report we demonstrated that under aerobic conditions, Mycobacterium bovis BCG expressing an hsp60-driven second copy of the hypoxia-related transcriptional regulator DosR increased 2-fold or greater the expression of 38 out of the 48 genes belonging to the DosR regulon, including the latency antigens Rv1733c, Rv2029, Rv2627, and Rv2628. Expression of DosR under these conditions slightly delayed in vitro growth, but did not promote a non-replicating state as opposed to microaerobic and hypoxic adaptation. Our results suggest BCG producing DosR can be cultured under standard in vitro conditions, allowing evaluation of this strain as a latency-specific vaccine candidate. Set of arrays that are part of repeated experiments

2010-05-20 | E-GEOD-21932 | biostudies-arrayexpress

Lung-resident myeloid-derived suppressor cells display dual functionality in experimental tuberculosis

Project description:Using cell-based approaches and experimental mouse models for pulmonary TB we unveiled MDSCs as new myeloid populations directly interacting with Mycobacterium tuberculosis (Mtb). MDSCs readily phagocytosed Mtb, released proinflammatory (IL-6, IL-1M-NM-1) and immunomodulatory (IL-10) cytokines while retaining their suppressive capacity. MDSCs were identified at the site of infection in disease-resistant and -susceptible mice during pulmonary TB. Excessive MDSC accumulation in lungs correlated with elevated surface expression of IL-4RM-NM-1 and heightened TB lethality. Microarray experiments were performed as dual-color hybridizations on Agilent mouse whole genome catalog 44K arrays. To compensate for dye-specific effects, a dye-reversal color-swap was applied.

2014-12-21 | E-GEOD-57124 | biostudies-arrayexpress

Differentially regulated genes induced by in vitro generated Mycobacterium smegmatis cell wall deficient form

Project description:Transcriptional profile of chemically generated Mycobacterium smegmatis cell wall deficient forms, comparing untreated control cells (bacillary forms) and cell wall deficient cells. Two-condition experiment, MSMEG-K vs. MSMEG-Sph cells. Biological replicates: 3 controls, 3 spheroplasts, independently grown and harvested. In controls and spheroplasts, good quality RNA samples obtained from each pellet were pooled together and used for microarray experiments to get an average of three separate experiments, Three replicates per array.

2012-11-29 | E-GEOD-32133 | biostudies-arrayexpress

Differentially regulated genes induced by in vitro generated Mycobacterium avium subspecies paratuberculosis cell wall deficient forms

Project description:Transcriptional profile of chemically generated Mycobacterium avium subspecies paratuberculosis cell wall deficient forms, comparing untreated control cells (bacillary forms) and cell wall deficient cells. Two-condition experiment, MAP-K vs. MAP-Sph cells. Biological replicates: 3 controls, 3 spheroplasts, independently grown and harvested. In controls and spheroplasts, good quality RNA samples obtained from each pellet were pooled together and used for microarray experiments to get an average of three separate experiments, four replicates per array.

2012-11-29 | E-GEOD-32235 | biostudies-arrayexpress

Differentially regulated genes induced by in vitro generated Mycobacterium tuberculosis cell wall deficient forms

Project description:Transcriptional profile of chemically generated Mycobacterium tuberculosis cell wall deficient forms, comparing untreated control cells (bacillary forms) and cell wall deficient cells. Two-condition experiment, MTB-K vs. MTB-Sph cells. Biological replicates: 3 controls, 3 spheroplasts, independently grown and harvested. In controls and spheroplasts, good quality RNA samples obtained from each pellet were pooled together and used for microarray experiments to get an average of three separate experiments, five replicates per array.

2012-11-29 | E-GEOD-32236 | biostudies-arrayexpress

High-resolution transcriptome and genome-wide dynamics of RNA polymerase and NusA in Mycobacterium tuberculosis (ChIP-seq)

Project description:To construct a regulatory map of the genome of the human pathogen, Mycobacterium tuberculosis, we applied two complementary high-resolution approaches, strand-specific RNA-seq and ChIP-seq, to survey the global transcriptome and monitor genome-wide dynamics of RNA polymerase (RNAP) and NusA. ChIP-seq revealed that RNAP and the antiterminator, NusA, occurred ubiquitously with the NusA profile mirroring RNAP distribution in both the exponential and stationary phases of growth. Generally, promoter-proximal peaks for RNAP and NusA were observed, followed by a decrease in signal strength reflecting transcriptional polarity. Differential binding of RNAP and NusA in the two growth conditions correlated with transcriptional activity as reflected by RNA abundance. Indeed, a significant association between expression levels and the presence of NusA throughout the gene body was detected, confirming the peculiar transcription-promoting role of NusA. Integration of the datasets pinpointed transcriptional units, mapped promoters and uncovered new anti-sense and non-coding transcripts. Highly expressed transcriptional units were situated mainly on the leading strand, despite the relatively unbiased distribution of genes throughout the genome, thus helping the replicative and transcriptional complexes to align. ChIP-Seq of RNAP and NusA in Mtb H37Rv at exponential and stationary phase cultures. Each experiment was performed in duplicate. Input DNA (No IP) was used as a control.

2012-12-01 | E-GEOD-40845 | biostudies-arrayexpress

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data