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RNA-seq analysis of Mycobacterium avium TMC724 vs. M. avium 104 non-coding and coding transcriptome

ABSTRACT: Deep sequencing was implemented to study the transcriptional landscape of Mycobacterium avium TMC724. High-resolution transcriptome analysis identified the transcription start points for 652 genes. One third of these coincided with the start codons and therefore belong to leaderless transcripts, whereas the rest of the transcripts had 5' UTRs with the mean length of 83 nt. In addition, the 5' UTRs of 6 genes contained SAM-IV and Ykok types of riboswitches. 87 antisense RNAs and 9 intergenic small RNAs were mapped. Four of the revealed intergenic small RNAs, including igMAV_1034-1035 expressed at a very high level, have no homologs in M. tuberculosis, whilst M. avium lacks several intergenic sRNAs present in M. tuberculosis. Among those, MTS479 and MTS1338 are of special interest due to their possible implication in pathogenesis. Elucidation of differences in the repertoire of intergenic sRNAs between the two mycobacterial species may improve our understanding of mycobacterial diseases pathogenesis.

ORGANISM(S): Mycobacterium avium

PROVIDER: GSE46281 | GEO | 2013/04/23

SECONDARY ACCESSION(S): PRJNA198512

REPOSITORIES: GEO

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RNA-seq analysis of Mycobacterium avium TMC724 vs. M. avium 104 non-coding and coding transcriptome

Project description:Deep sequencing was implemented to study the transcriptional landscape of Mycobacterium avium TMC724. High-resolution transcriptome analysis identified the transcription start points for 652 genes. One third of these coincided with the start codons and therefore belong to leaderless transcripts, whereas the rest of the transcripts had 5' UTRs with the mean length of 83 nt. In addition, the 5' UTRs of 6 genes contained SAM-IV and Ykok types of riboswitches. 87 antisense RNAs and 9 intergenic small RNAs were mapped. Four of the revealed intergenic small RNAs, including igMAV_1034-1035 expressed at a very high level, have no homologs in M. tuberculosis, whilst M. avium lacks several intergenic sRNAs present in M. tuberculosis. Among those, MTS479 and MTS1338 are of special interest due to their possible implication in pathogenesis. Elucidation of differences in the repertoire of intergenic sRNAs between the two mycobacterial species may improve our understanding of mycobacterial diseases pathogenesis. Transcriptional profile of Mycobacterium avium TMC724, grown at 37M-BM-0C in Dubos broth until mid-logarithmic growth phase

2013-04-23 | E-GEOD-46281 | biostudies-arrayexpress

Global host transcriptional profiles following Mycobacterium avium subsp. paratuberculosis infection in mice

2014-10-31 | GSE62836 | GEO

Global host transcriptional profiles following Mycobacterium avium subsp. paratuberculosis infection in mice

Project description:We focused on how Mycobacterium avium subsp. paratuberculosis influences the subsequent host response to investigate the host immunopathology accompanying the host anti-mycobacterial immune response during Mycobacterium avium subsp. paratuberculosis infection in spleen of mice. We analyzed altered transcription in the spleen of mice at 3, 6, and 12 weeks following Mycobacterium avium subsp. paratuberculosis infection.

2014-10-31 | E-GEOD-62836 | biostudies-arrayexpress

Expression analysis of Mycobacterium avium subsp. paratuberculosis K-10 within macrophage cell line

2013-01-22 | GSE43645 | GEO

Specificity of the innate immune responses to different classes of non-tuberculous mycobacteria

Project description:Mycobacterium avium is the most common nontuberculous mycobacterium (NTM) species causing infectious disease. Here, we characterized a M. avium infection model in zebrafish larvae, and compared it to M. marinum infection, a model of tuberculosis. Using RNAseq analysis, we found a distinct transcriptome response in cytokine-cytokine receptor interaction for M. avium and M. marinum infection. In addition, we found substantial differences in gene expression in metabolic pathways, phagosome formation, matrix remodeling, and apoptosis in response to these mycobacterial infections.

2023-01-12 | GSE218892 | GEO

Expression analysis of Mycobacterium avium subsp. paratuberculosis K-10 within macrophage cell line

Project description:Once entering the cell, M. avium subsp.paratuberculosis is known to survive harsh microenvironments, especially those inside activated macrophages. To improve our understanding of M. avium subsp.paratuberculosis pathogenesis, we examined the phagosome maturation associated with transcriptional responses of M. avium subsp.paratuberculosis during macrophage infection. Monitoring cellular markers, only live M. avium subsp.paratuberculosis bacilli were able to prevent phagosome maturation and reduce its acidification. On the transcriptional level, over 300 of M. avium subsp.paratuberculosis genes were significantly, differentially regulated in both naM-CM-/ve and IFN-M-NM-3-activated macrophages. These genes include the sigma factor H (sigH) that was shown to be important during persistent infection in M. tuberculosis. Bacterial total RNA was purified from Mycobacterium avium subsp. paratuberculosis that was infected into J774A.1 cells grown with or without interferon-gamma activation at 2 or 24 h post-infection. RNA from bacteria incubated with PRMI-1640 medium for 2 h, which was the infection conditon, is used as control condition. Each condition has two biological replicates. Each hybridization represents expression levels of all 4,350 annotated genes with 20 60-mer oligonucleotides and with three technical replicates.

2013-01-22 | E-GEOD-43645 | biostudies-arrayexpress

Novel Events, Gene Model Correction of Mycobacterium Avium by Proteogenomic Analysis

Project description:Mycobacterium avium is one of the prominent disease causing bacteria in humans. It causes lymphadenitis, chronic pulmonary and extrapulmonary and disseminated infections in adults, children and immunocompromised humans. M. avium has ~4,500 predicted gene models, out of which not all are identified at proteomic level. Proteomic database search followed by proteogenomic analysis helps in the correction of gene models, identification of novel exons/genes, variant proteins. As part of this study, we performed proteomic analysis of M. avium cultures by data-dependent acquisition (DDA) and data-independent acquisition (DIA) method followed by proteogenomic analysis of M. avium proteomic data. M. avium culture was subjected to proteomic sample preparation. The resulting peptides were acquired in 120min DDA (12 bRPLC) and DIA method using EASY nLC 1200 liquid chromatogram system coupled to Orbitrap Fusion Tribrid mass spectrometer. The resulting DDA raw files were searched sequentially against the M. avium proteome database, Mycobacterium tuberculosis H37Rv and Ra proteome database (Mtb), M. avium genome six-frame translated proteome and variant proteins database, respectively. The database search result was converted into a spectral library and used for DIA data search for the validation of GSSPs and variant peptides. The database search of M. avium DDA has resulted in the identification of 2,954 M. avium proteins, 128 Mtb proteins, 174 GSSPs (M. avium genome six-frame translated proteome) and 795 SNPs corresponding to 612 proteins (variant proteins database), respectively. The M. avium proteome database search has covered 62.09% of the proteome with the identification of 2,954 proteins out of 4,757 proteins in the database. From the manual categorization of 174 GSSPs, we observed 23 N-terminal extensions, 142 pseudogene coding peptides and one each novel exon and short peptide, respectively.

2023-03-17 | PXD032067 | Pride

Transcriptome analysis of long non-coding RNAs in Mycobacterium avium complex-infected macrophages

Project description:Mycobacterium avium complex (MAC) is a non-tuberculosis mycobacteria widely distributed throughout environment. Even though the MAC infection is currently increasing in old women and patients with affected immune system, comprehensive analysis of MAC-infected host cell transcriptome, in particular that of long non-coding RNAs (lncRNAs), has scarcely been reported. Using in vitro cultured primary mouse bone marrow-derived macrophages (BMDMs) and CAGE technology, we analyzed the transcriptional and kinetic landscape of macrophage genes, with focusing on lncRNAs, during MAC infection. MAC-infected macrophages induced immune/inflammatory response genes and other genes as similar as M1 activation, consistent with previous reports, although Nos2 and Arg1 revealed distinct expression profiles from M1 activation. We identified 31 up-regulated and 30 down-regulated lncRNA promoters corresponding to 18 and 27 lncRNAs, respectively. The up-regulated lncRNAs were clustered into two groups, early and late up-regulated groups, which were predicted to associate with the immune activation and the immune response to infection, respectively. Further, the Ingenuity IPA analysis predicted canonical pathways and upstream transcription regulators associated with differentially expressed lncRNAs. Several differentially expressed lncRNAs that have been reported elsewhere revealed various expressional change by M1 or M2 pre-activation and the following MAC infection. Finally, we showed that expressional change of lncRNAs in MAC-infected BMDMs is predominantly mediated by Tlr2, but there may be other weakly sensing mechanism for MAC infection. Taken together, we identified differentially expressed lncRNAs in MAC-infected BMDMs, which revealed diverse features implying their distinct role in MAC infection and macrophage polarization.

2024-01-01 | GSE249460 | GEO

Mycobacterium avium subsp. paratuberculosis antigens induce cellular immune responses in cattle

Project description:Mycobacterium avium subspecies paratuberculosis (MAP) causes chronic progressive granulomatous enteritis leading to diarrhea, weight loss, and eventual death in ruminants. Commercially available vaccines provide only partial protection against MAP infection and can interfere with the use of current diagnostic tests for bovine tuberculosis in cattle. In the current study, we characterized immune responses in calves to vaccines containing either MAP fusion protein particles (MAP antigens Ag85A202-347-SOD1-72 -Ag85B173-330-74F1-148+669-786 as a fusion), recombinant MAP (rMAP) fusion protein or commercially available Silirum(R) vaccine.

2022-12-21 | GSE221544 | GEO

Abundant and diverse non-coding small RNAs identified in an extremophilic microbial community using metatranscriptomics

Project description:Regulatory small RNAs (sRNAs) represent a major class of regulatory molecules that play large-scale and essential roles in many cellular processes across all domains of life. Microbial sRNAs have been primarily investigated in a few model organisms and little is known about the dynamics of sRNA synthesis in natural environments, and the roles of these short transcripts at the community level. Analyzing the metatranscriptome of a model extremophilic community inhabiting halite nodules (salt rocks) from the Atacama Desert, sampled over two years with different weather conditions, with SnapT – a new sRNA annotation pipeline – we discovered hundreds of intergenic (itsRNAs) and antisense (asRNAs) sRNAs expressed.

2020-01-09 | GSE137164 | GEO

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