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MtrA is involved in progression of Mycobacterium tuberculosis cell cycle

ABSTRACT: Synchronised cultures of Mycobacterium tuberculosis (M. tb H37Ra DnaAcos115) were used to determine the cell cycle dependent gene expression.

ORGANISM(S): Mycobacterium tuberculosis Mycobacterium tuberculosis H37Ra

PROVIDER: GSE53640 | GEO | 2015/12/31

SECONDARY ACCESSION(S): PRJNA232533

REPOSITORIES: GEO

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MtrA is involved in progression of Mycobacterium tuberculosis cell cycle

Project description:Synchronised cultures of Mycobacterium tuberculosis (M. tb H37Ra DnaAcos115) were used to determine the cell cycle dependent gene expression. Mycobacterium tuberculosis H37Ra DnaAcos115 strain was grown in Middlebrook 7H9 broth at 30C for 30h which arrests replication and later cultures were allowed to grow at 37oC for 30h. Samples were collected at 0, 2, 6, 12,18, 24 and 30 hours. Samples at 30oC for 30h were considered as '0' time point. A total of 18 samples, consisting of triplicates for 6 time-points were analyzed using microarray.

2015-12-31 | E-GEOD-53640 | biostudies-arrayexpress

Mycobacterium tuberculosis: yidC (Rv3921c) induced Vs Control cultures

Project description:Transcriptional profiling of Mycobacterium tuberculosis H37Ra::pTetR-yidC (Test) compared with Mycobacterium tuberculosis H37Ra::pTetR (Control) bacteria after 4 days of treatment with 50ng/ml ATc with shaking at 200rpm at 37°C.

2018-11-28 | GSE110355 | GEO

Mycobacterium tuberculosis: DNA gyrase depleted Vs control

Project description:Transcriptional profiling of gyr(-) strain of Mycobacterium tuberculosis H37Ra comparing 20ng/ml ATc treated cells with ATc-untreated cells after 4 days of treatment with shaking at 200rpm at 37°C.

2019-03-07 | GSE120139 | GEO

Genome-wide maps of gene transcription levels in RAW264.7 infected with CdhM-related Mycobacterium tuberculosis H37Ra strain.

Project description:We report the application of RNA-seq technology for high-throughput profiling of gene transcription in RAW264.7 infected with Mycobacterium tuberculosis H37Ra. By obtaining over six billion bases of sequence from mRNA, we generated genome-wide gene transcription maps of RAW264.7 infected with CdhM-related Mycobacterium tuberculosis H37Ra. We find that numerous genes involved in ER stress are significantly affected by CdhM. This finding indicates that CdhM may induce ER stress during Mtb infection of host cells.

2022-02-24 | GSE196961 | GEO

Host directed activity of Pyrazinamide in Mycobacterium tuberculosis infection

Project description:Pyrazinamide (PZA) is one of the first line antibiotics used for the treatment of tuberculosis (TB). we have used human monocyte and a mouse model of pulmonary TB to investigate whether treatment with PZA, in addition to its known anti-mycobacterial properties, modulate the host immune response during Mycobacterium tuberculosis (Mtb) infection.

2013-06-28 | GSE48027 | GEO

Genome-wide maps of gene transcription level in wild-type and mpbR-deleted Mycobacterium tuberculosis H37Ra strains

Project description:We report the application of RNA-seq technology for high-throughput profiling of gene transcription in M. tuberculosis H37Ra strains. By obtaining over four billion bases of sequence from mRNA, we generated genome-wide gene transcription maps of wild-type and mpbR-deleted Mycobacterium tuberculosis H37Ra strains. We find that a group of genes is significantly up-regulated in the mpbR-deleted mutant strain. This finding indicates that MpbR negatively regulates gene expression.

2022-08-26 | GSE136322 | GEO

Vitamin C Stimulon in Mycobacterium tuberculosis

Project description:The emergence of drug resistance among tuberculosis (TB) patients is often associated with their non-compliance to the length of the chemotherapy, which can reach up to 2 years for the treatment of multi-drug-resistant (MDR) TB. Drugs that would kill TB faster and would not lead to the development of drug resistance could shorten chemotherapy significantly. In Escherichia coli, the common mechanism of cell death by bactericidal antibiotics is the generation of highly reactive hydroxyl radicals via the Fenton reaction. Since ascorbic acid (vitamin C) is known to drive the Fenton reaction, we tested whether the Fenton reaction could lead to a bactericidal event in Mycobacterium tuberculosis by treating M. tuberculosis cultures with vitamin C. Here, we report that the addition of vitamin C to drug-susceptible, MDR and extensively drug-resistant (XDR) M. tuberculosis strains results in sterilization of the cultures in vitro. We show that the sterilizing effect of vitamin C on M. tuberculosis was dependent on the production of high ferrous ion levels and reactive oxygen species. Although, this potent sterilizing activity of vitamin C against M. tuberculosis in vitro was not observed in mice, we believe this activity needs further investigation. Comparison of vitamin C treated Mycobacterium tuberculosis transcriptome relative to untreated; Three biological replicates, second is a dye flip

2013-05-24 | E-GEOD-42293 | biostudies-arrayexpress

Mycobacterium tuberculosis associated with severe tuberculosis evades cytosolic surveillance systems and modulates IL-1β production

Project description:Tuberculosis (TB) remains a deadly disease. The genetic diversity of Mycobacterium tuberculosis was neglected in the past, but is increasingly recognized as a determinant of immune responses and clinical outcomes of TB. However, how this bacterial diversity orchestrates immune responses to direct differences in TB severity remains unknown. We studied 681 patients with pulmonary TB and found that phylogenetically related M. tuberculosis isolates from cases with mild disease induced robust cytokine responses in macrophages. In contrast, isolates associated with severe TB cases failed to do so. Using representative isolates, we show that M. tuberculosis inducing a low cytokine response in macrophages also diminished activation of cytosolic surveillance systems, including cGAS and the inflammasome, suggesting a novel mechanism of immune escape. Isolates exhibiting this evasion strategy carried mutations in various components of the ESX-I secretion system. We conclude that host interactions with different M. tuberculosis strains results in variable TB severity.

2020-02-26 | GSE138580 | GEO

Mycobacterium tuberculosis modified proteome under oxidative stress

Project description:Tuberculosis (TB), which is caused by Mycobacterium tuberculosis (Mtb), continues to be a public health threat. With the development and widespread of drug-resistant TB, the pressure of prevention and treatment is increasing. To determine and quantify the modified proteins, high resolution mass spectrometry were used to label and quantify the peptides and proteins modified.

2023-03-09 | PXD035802 | Pride

Human alveolar macrophage metabolism is compromised during Mycobacterium tuberculosis infection

Project description:Pulmonary macrophages have two distinct ontogenies: long-lived embryonically-seeded alveolar macrophages (AM) and bone marrow-derived macrophages (BMDM). Here, we show that after infection with a virulent strain of Mycobacterium tuberculosis (H37Rv), primary murine AM exhibit a unique transcriptomic signature characterized by metabolic reprogramming distinct from conventional BMDM. In contrast to BMDM, AM failed to shift from oxidative phosphorylation (OXPHOS) to glycolysis and consequently were unable to control infection with an avirulent strain (H37Ra). Importantly, healthy human AM infected with H37Ra equally demonstrated diminished energetics, recapitulating our observation in the murine model system. However, the results from seahorse showed that the shift towards glycolysis in both AM and BMDM was inhibited by H37Rv. We further demonstrated that pharmacological (e.g. metformin or the iron chelator desferrioxamine) reprogramming of AM towards glycolysis reduced necrosis and enhanced AM capacity to control H37Rv growth. Together, our results indicate that the unique bioenergetics of AM renders these cells a perfect target for Mtb survival and that metabolic reprogramming may be a viable host adjunctive therapy against TB.

2022-12-09 | GSE219072 | GEO

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