Small RNA-Seq showing transfer of bacterial outer membrane vesicle (OMV) sRNA to host airway epithelial cells
Ontology highlight
ABSTRACT:
ORGANISM(S): Pseudomonas aeruginosa Homo sapiens
PROVIDER: GSE80421 | GEO | 2016/05/13
SECONDARY ACCESSION(S): PRJNA318881
REPOSITORIES: GEO
Similar Datasets
Project description:This study is the first to show transfer of regulatory bacterial sRNAs from bacterial OMVs to host cells. Demonstration of transfer of bacterial sRNA from Pseudomonas aeruginosa OMVs to host cells in two cell types. RNA isolated from PA14 OMV exposed primary human bronchial epithelial cells or CFBE41o- bronchial epithelial cells as well as unexposed control cells was analyzed by small RNA-Seq. Primary cell exposures were performed on two donors and exposures of CFBE41o- cells were done in triplicate.
2016-05-13 | E-GEOD-80421 | biostudies-arrayexpress
Project description:Characterization of the sRNA content of P. aeruginosa OMVs compared to whole cells. Result: OMVs contain differentially packaged sRNAs. Whole cell PA14 and OMVs from 3 separate preparations.
2016-05-13 | E-GEOD-71598 | biostudies-arrayexpress
Project description:Characterization of the sRNA content of P. aeruginosa OMVs compared to whole cells. Result: OMVs contain differentially packaged sRNAs.
2016-05-13 | GSE71598 | GEO
Project description:Helicobacter pylori, a bacterium that colonizes the human stomach, like all Gram-negative bacteria spontaneously shed outer membrane vesicles (OMVs). OMVs, which act as a delivery system for bacterial components, are involved in bacterial-host interactions and thus contribute to pathogenesis. In this study, to understand the gene expression changes that human gastric epithelial cells might undergo when exposed to H. pylori-OMVs, we profiled the transcriptomic changes of the MKN74 gastric cell line induced by OMVs compared to control cells and H. pylori-infected cells, using the Ion AmpliSeq™ Transcriptome Human Gene Expression Panel. The top enriched pathways in the OMVs challenge condition included amino acid-related metabolic pathways, mitogen-activated protein kinase signaling, autophagy, and ferroptosis. The cell cycle, DNA replication, and repair pathways were the top diminished pathways. The transcriptomic changes induced by OMVs were largely consistent with those of the bacteria, although often at low expression levels, suggesting that their effects will mostly reinforce those of the bacterium itself. Our data provide a valuable portrayal of the transcriptomic remodeling of gastric cells by H. pylori-OMVs, which can be further dissected regarding the underlying molecular mediators and explored to understand the pathobiology of the full-spectrum of H. pylori-mediated diseases.
2024-04-03 | GSE229512 | GEO
Project description:We performed comparative transcriptomic analysis of the outer membrane vesicles (OMVs) released from B. burgdorferi. We identified a total of ~1200 unique transcripts with at least one mapped read from the bacterial cell and its OMVs.
2018-06-21 | GSE114368 | GEO
Project description:Gram negative bacteria release outer membrane vesicles (OMVs) as part of their natural growth. These OMVs take part in a biological functions including bacterial communication, exchange of genetic material and bacterial pathogenesis. However, the relationship between bacterial growth stage and OMV protein composition has not been explored before nor how their proteome is different to their parent bacterium. In this study, we examined the proteome of Helicobacter pylori and its OMVs from early log, late log or stationary phase of growth and found that globally, the protein content of OMVs over time is vastly different to one another as well as to their parent bacterium. OMVs purified from early log phase of growth contained the greatest number of unique proteins and a significant upregulation of virulence and pathogenic proteins. However, when compared back to their parent bacterium, OMVs from later stages of growth contained more unique proteins than those from earlier stages of growth. We show for the first time the regulation of OMV protein composition by H. pylori that is dependent on bacterial growth stage. Our results have expanded our understanding of the fundamental production of OMVs and the selective packaging of cargo in OMVs that result in specific functions.
2021-03-23 | PXD024918 | Pride
Project description:small RNA-Seq showing transfer of bacterial outer membrane vesicle (OMV) sRNA to host airway epithelial cells
| PRJNA318881 | ENA
Project description:Asthma is the most common chronic respiratory disease. Asthma that cannot be well controlled by steroid treatment is called steroid-resistant asthma. Steroid-resistant asthma accounts for only 5% of all asthma cases, but it accounts for 80% of asthma healthcare costs. Nontypeable Haemophilus influenzae (NTHi), as a Gram-negative bacterium, can release outer membrane vesicles (OMVs) and transfer biomolecules to host cells and the external environment by carrying lipopolysaccharides, proteins, peptidoglycans, outer membrane proteins, cell wall components, proteins, nucleic acids, ion metabolites, and signaling molecules. Thus, it plays a role in obtaining nutrition, stress, toxin delivery, adhesion, host immune surveillance evasion, and host immune response regulation. It becomes an essential way in bacterial pathogenesis. To further clarify whether NTHi OMVs could be inhaled to induce steroid-resistant asthma, we isolated and purified NTHi OMVs. In vivo experiments showed that NTHi OMVs could be inhaled and enter airway epithelial cells. Cosensitization with OVA induces steroid-resistant asthma in mice. Furthermore, through high-throughput sequencing, we found that the NTHi OMVs and OVA co-sensitized mice had significantly enriched inflammatory and immune-related signaling pathways, and the transcription and secretion of IL-1β were increased was the potential cause of SRA.
2023-07-18 | GSE222546 | GEO
Project description:The outer membrane vesicles (OMVs) produced by Porphyromonas gingivalis (P. gingivalis) contain a variety of bioactive molecules that may be involved in the progression of periodontitis. However, the participation of P. gingivalis OMVs in the development of periodontitis has not been elucidated. Here we isolated P. gingivalis OMVs and confirmed their participation in periodontitis both in vivo and in vitro. Microcomputed Tomography (micro-CT) and histological analysis showed that under the stimulation of P. gingivalis OMVs, the alveolar bone of rats was significantly resorbed in vivo. We found that P. gingivalis OMVs were taken up by hPDLCs (human Periodontal Ligament Cells, hPDLCs) in vitro, then subsequently resulting in apoptosis and inflammatory cytokines releasing which was accomplished by the microRNA-size small RNAs (msRNAs) sRNA45033 in the P. gingivalis OMVs. Through bioinformatics analysis and screening of target genes, Chromobox 5 (CBX5) was identified as the downstream target of screened-out small RNA s45033. Using dual-luciferase reporter assay, overexpression, and knockdown methods, s45033 was confirmed to target CBX5 to regulate hPDLCs apoptosis. In addition, Cleavage Under Targets and Tagmentation (Cut&Tag) analysis confirmed the mechanism that CBX5 regulates apoptosis through the methylation of p53 DNA. Collectively, these findings indicate that the role of P. gingivalis OMVs is immunologically relevant and related to bacterial virulence in the development of periodontitis.
2022-11-30 | GSE218606 | GEO
Project description:Objectives: This study aimed to investigate the microbiological characteristics of outer membrane vesicles (OMVs) derived from Pseudomonas aeruginosa (P. aeruginosa) to understand their mechanisms of inhibition of Acinetobacter baumannii (A. baumannii) in vitro. Methods: We assessed the inhibitory effects of P. aeruginosa on A. baumannii using a modified cross-streak assay. Subsequently, OMVs were extracted from P. aeruginosa strains using high-speed centrifugation, tangential flow filtration, ultrafiltration, and ultracentrifugation. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), transmission electron microscopy (TEM), and nanoparticle tracking assays (NTAs) were performed to confirm the presence of the extracted OMVs. P. aeruginosa-derived OMVs’ inhibitory activity against A. baumannii was tested using a modified time-kill assay. The proteomic analysis of OMVs revealed potential antibacterial protein clusters with diverse functions. Results: P. aeruginosa 022 (PA022) demonstrated inhibition of A. baumannii in the cross-streak assay. The protein levels of OMVs for PA022 and P. aeruginosa ATCC 27853 (PA ATCC 27853) were 1665 and 428.6 μg/mL, respectively. Additionally, PA 022 and PA ATCC 27853 exhibited variable patterns and sizes in the SDS-PAGE, TEM, and NTA. Furthermore, the growth inhibitory effect of PA022 OMVs on A. baumannii was evaluated using a modified time-kill assay. The proteomic analysis of OMVs revealed potential antibacterial protein clusters in PA 022 associated with virulence, motility, and post-translational modifications. Conclusion: Our study contributes to the understanding of P. aeruginosa OMVs characteristics and their inhibitory effect against A. baumannii, providing insights into the development of alternative therapeutic approaches against multi-drug resistance.
2023-09-18 | PXD045094 | Pride