Ontology highlight
ABSTRACT:
PROVIDER: PRJNA486336 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR7702980_1.fastq.gz | Fastqsanger.gz | |||
| SRR7702980_2.fastq.gz | Fastqsanger.gz | |||
| SRR7702981_1.fastq.gz | Fastqsanger.gz | |||
| SRR7702981_2.fastq.gz | Fastqsanger.gz |
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Project description:Mycobacterium avium complex (MAC), including Mycobacterium avium and Mycobacterium intracellulare (MI), accounts for a significant portion of nontuberculous mycobacterial lung disease affecting immunocompromised and lung structural disease patients. Adapting pathogens to a host-induced hostile environment is critical to establishing infection and persistence within the host. However, the cellular and molecular mechanisms of stress response for MAC still need to be elucidated. In this study, we analyzed the transcriptional profile of MI under acidic and oxidative stress conditions using RNA-seq. At the transcriptome level, 80 genes were shown [FC] ≥2.0 and p <0.05 under oxidative stress with 10 mM hydrogen peroxide. In detail, 77 genes were upregulated, while 3 genes were downregulated. Also, 878 genes were shown [FC] ≥2.0 and p <0.05 under acidic stress with pH 4.5. Among these genes, 339 were upregulated, while 539 were downregulated. Functional analysis revealed the activation of several pathways, including nitrogen and sulfur metabolism, under acidic stress conditions. On the contrary, oxidative stress conditions activated DNA replication and repair pathways. Our data demonstrate the activation of nitrogen and sulfur metabolism in MAC infection, which could be crucial for persistence and survival under stress conditions encountered within the host during infection. In conclusion, this study suggests the importance of stress responses in MAC pathogenesis and identifies potential therapeutic target pathways.
2024-02-21 | GSE244264 | GEO
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
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.
2014-10-31 | GSE62836 | GEO
Project description:A comparative genomic approach was used to identify large sequence polymorphisms among Mycobacterium avium isolates obtained from a variety of host species. DNA microarrays were used as a platform for comparing mycobacteria field isolates with the sequenced bovine isolate Mycobacterium avium subsp. paratuberculosis (Map) K10. ORFs were classified as present or divergent based on the relative fluorescent intensities of the experimental samples compared to Map K10 DNA. Map isolates cultured from cattle, bison, sheep, goat, avian, and human sources were hybridized to the Map microarray. Three large deletions were observed in the genomes of four Map isolates obtained from sheep and four clusters of ORFs homologous to sequences in the Mycobacterium avium subsp. avium (Maa) 104 genome were identified as being present in these isolates. One of these clusters encodes glycopeptidolipid biosynthesis enzymes. One of the Map sheep isolates had a genome profile similar to a group of Mycobacterium avium subsp. silvaticum (Mas) isolates which included four independent laboratory stocks of the organism traditionally identified as Maa strain 18. Genome diversity in Map appears to be mostly restricted to large sequence polymorphisms that are often associated with mobile genetic elements. Keywords: Comparative genomic hybridization
2007-04-27 | GSE7622 | GEO
Project description:This SuperSeries is composed of the following subset Series: GSE32241: Differentially regulated genes induced in Mycobacterium avium subspecies paratuberculosis by in vitro acid-nitrosative multi-stress GSE32242: Differentially regulated genes induced in Mycobacterium avium subspecies paratuberculosis by in vitro infection of THP-1 human macrophage cell line Refer to individual Series
2012-05-31 | E-GEOD-32243 | biostudies-arrayexpress
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
Project description:An opportunistic intracellular pathogen Mycobacterium intracellulare, a member of the nontuberculous mycobacteria (NTM) cluster, causes respiratory disease in immunosuppressed hosts, including companion dogs. The purpose of this study is to investigate a host-M.intracellulare interactome in canine monocyte-derived macrophages during the infection.
2020-09-24 | GSE158425 | GEO
Project description:Rationale: T cell activation is a key antimicrobial component against mycobacterial disease. Programmed cell death-1 (PD-1) and programmed cell death-ligand 1 (PD-L1) pathway could affect the antimicrobial immune responses by suppressing T cell activity. Several recent studies demonstrated that blocking of PD-1/PD-L1 pathway exacerbated Mycobacterium tuberculosis infection. However, the influence of blocking this pathway in pulmonary Mycobacterium avium-intracellulare complex (MAC) infection was not fully understood. Objective: We aimed to determine the influence of genetic depletion of PD-1/PD-L1 pathway on the disease activity of MAC infection. Methods: Wild-type, PD-1-deficient mice and PD-L1-deficient mice were intranasally infected with Mycobacterium avium bacteria. Measurements and Main Results: The depletion of PD-1 or PD-L1 did not affect mortality and bacterial burden in mice infected with MAC. However, remarkable infiltration of CD8 T lymphocytes was observed in the lungs of PD-1 and PD-L1 deficient mice compared to wild-type mice. Comprehensive transcriptome analysis showed that levels of gene expressions related to Th1 immunity did not differ according to the genotypes. However, genes related to the activity of CD8 T cells and related chemokine activity were up-regulated in the infected lungs of PD-1 and PD-L1 deficient mice. Conclusions: Depletion of PD-1/PD-L1 pathway did not affect the activation of Th1 immunity in response to MAC infection, which may explain why MAC infection was controlled in these mice. In addition, CD8-positive T cell pulmonary inflammation in knockout mice might have some clinical implication in the treatment of cancer patients with immune checkpoint inhibitors when the patients are infected with MAC.
2021-09-15 | GSE169202 | GEO
Project description:A comparative genomic approach was used to identify large sequence polymorphisms among Mycobacterium avium isolates obtained from a variety of host species. DNA microarrays were used as a platform for comparing mycobacteria field isolates with the sequenced bovine isolate Mycobacterium avium subsp. paratuberculosis (Map) K10. ORFs were classified as present or divergent based on the relative fluorescent intensities of the experimental samples compared to Map K10 DNA. Map isolates cultured from cattle, bison, sheep, goat, avian, and human sources were hybridized to the Map microarray. Three large deletions were observed in the genomes of four Map isolates obtained from sheep and four clusters of ORFs homologous to sequences in the Mycobacterium avium subsp. avium (Maa) 104 genome were identified as being present in these isolates. One of these clusters encodes glycopeptidolipid biosynthesis enzymes. One of the Map sheep isolates had a genome profile similar to a group of Mycobacterium avium subsp. silvaticum (Mas) isolates which included four independent laboratory stocks of the organism traditionally identified as Maa strain 18. Genome diversity in Map appears to be mostly restricted to large sequence polymorphisms that are often associated with mobile genetic elements. Keywords: Comparative genomic hybridization Each isolate was competitively hybridized against Map K10 with a minimum of 2 dye flip hybridizations per isolate.
2010-06-11 | E-GEOD-7622 | biostudies-arrayexpress
Project description:Mycobacterium intracellulare overview
| PRJNA36809 | ENA