Project description:Dysbiosis, or changes within the microbiome, is a common feature of solid tumors, however whether this dysbiosis directly contributes to tumor development is largely unknown. We previously characterized the human lung cancer microbiome and identified the Gram-negative Acidovorax temperans as enriched in tumors and associated with smoking status and TP53 mutations. To determine if A. temperans exposure could contribute to the development of lung cancer, we investigated its effect in a genetically engineered mouse model of lung adenocarcinoma driven by mutant Kras and Tp53. In comparison to control mice and those instilled with a commensal species Lactobacillus gasseri, we found that repeated A. temperans exposure accelerates tumor development and burden through infiltration of proinflammatory cells in the lungs. Comparing immune cell infiltrates at two timepoints revealed increased proinflammatory cells immediately following A. temperans instillation while later the number of T cells, especially IL-17+ cells, was increased. These data indicate a clear role for microbiota-induced inflammation as a key mechanism in the development of lung cancer, demonstrating that dysbiosis contributes to tumor growth.

2024-04-05 | GSE259408 | GEO

Acidovorax temperans strain:DSM 7270

Project description:Acidovorax temperans DSM 7270 genome sequencing

| PRJNA332047 | ENA

Acidovorax temperans skews neutrophil maturation and polarizes Th17 cells to promote lung adenocarcinoma development

Project description:Dysbiosis, or changes within the microbiome, is a common feature of solid tumors, however whether this dysbiosis directly contributes to tumor development is largely unknown. We previously characterized the lung cancer microbiome and identified the Gram-negative Acidovorax temperans as enriched in tumors and associated with smoking status and TP53 mutations. To determine if A. temperans exposure could contribute to the development of lung cancer, we investigated its effect in an animal model of lung adenocarcinoma driven by mutant Kras and Tp53 alleles. This revealed A. temperans exposure accelerates tumor development and burden through infiltration of proinflammatory cells in the lungs. Neutrophils exposed to A. temperans displayed a mature, pro-tumorigenic phenotype with increased cytokine signaling, with a global shift away from IL-1β signaling. Neutrophil to monocyte and macrophage signaling promoted maturation of the latter cell types which upregulated MHC II to activate CD4+ T cells. Activated T cells were then polarized to an IL-17A+ phenotype detectable in CD4+ and γδ populations. Furthermore, T17 cells shared a common gene expression profile predictive of poor survival in human LUAD cases. These data indicate a clear role for microbiota-induced inflammation as a key mechanism in the development of lung cancer, demonstrating that dysbiosis contributes to tumor growth.

2022-07-07 | GSE207477 | GEO

Comparative transcriptional analysis of Acinetobacter baumannii strain ATCC 17978 and strain 17978hm

Project description:In this study the transcriptomes of Acinetobacter baumannii strains ATCC 17978 and 17978hm were compared. Strain 17978hm is a hns knockout derivative of strain ATCC 17978. Strain 17978hm displays a hyper-motile phenotype on semi-solid Mueller-Hinton (MH) media (0.25% agar). ATCC 17978 and 17978hm from an 37C overnight culture were transferred to the centre of the semi-solid MH plate and incubated at 37C for 8 hours. Only 17978hm cells displayed a motile phenotype and covered the complete surface of the plate. These motile 17978hm cells and the non-motile wild-type ATCC 17978 cells were harvested and RNA was isolated. The comparative transcriptome analysis was performed using the FairPlay labeling kit and a custom made Agilent MicroArray with probes designed to coding regions of the ATCC 17978 genome. The data was analyzed using Agilent GeneSpring GX9 and the significance analysis of microarray MS Excel add-on.

2013-08-05 | GSE40681 | GEO

Acidovorax oryzae ATCC 19882

Project description:Acidovorax oryzae ATCC 19882 Genome sequencing and assembly

| PRJNA223028 | ENA

RNA-Seq analyse the virulence mechanism of rice pathogen Acidovorax avenae subsp. avenae strain RS-1 following ß-lactam antibiotics exposure

Project description:This study investigated the transcriptomic response of rice pathogen Acidovorax avenae subsp. avenae (Aaa) strain RS-1 to ß-lactam antibiotics in particular Ampicillin (Amp) and the result highlights the importance of Amp-induced differentially expressed genes in the virulence of Aaa strain RS-1.

2017-02-10 | GSE68734 | GEO

Comparative LC/MS-based profiling of L-arginine producing, canavanine resistant Corynebacterium glutamicum strain ATCC 21831 and type strain ATCC 13032

Project description:Corynebacterium glutamicum strain ATCC 21831 is a producer of L-arginine that was created by random mutagenesis. It is resistant to the arginine structural analogue canavanine. In order to identify potential bottlenecks in the biosynthetic pathway that leads to this industrially important amino acid, relative metabolite abundances of biosynthetic intermediates were determined in comparison to the type strain ATCC 13032. An extract of U13C-labeled biomass was used as internal standard, to correct for different ionization efficiencies. Metabolites were identified using the ALLocator web platform.

2015-10-06 | MTBLS128 | MetaboLights

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