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

Transcriptional responses of Tanreqing treated Pseudomonas aeruginosa cells

Project description:Analysis of Pseudomonas aeruginosa PAO1 (ATCC 15692) treated by Tanreqing. PAO1 cells are evaluated with RNA-seq to understand the genes affected by this antibacterial agent. Our results provide new vision on the mode of action by Tanreqing.

2020-11-19 | GSE141753 | GEO

Transcriptional responses of oxyR mutation in Pseudomonas aeruginosa

Project description:Analysis of Pseudomonas aeruginosa PAO1 (ATCC 15692) transcriptional response by disruption of oxyR. PAO1 cells are evaluated with RNA-seq to understand the genes affected by this mutation. Our results provide new vision on the regulation of oxyR in pathogens.

2025-04-08 | GSE156842 | GEO

Unravelling the Proteomic Landscape of Imipenem Resistance in Pseudomonas aeruginosa: A Comparative Investigation between Clinical and Control Strains

Project description:The proteomic landscape of Pseudomonas aeruginosa under the influence of Imipenem, a commonly used antibiotic, has been the subject of investigation in this study. Our comparative analysis between the world epidemic clinical strain (6378/09) and the control strain (ATCC 27853)has revealed results highlighting the proteomic changes that occur in response to varying Imipenem concentrations. Utilizing label-free quantification (LFQ) intensity scores, protein-level t-tests, and Gene Ontology (GO) enrichment analysis, we have been able to delve deeper into the molecular mechanisms that underpin Imipenem resistance.

2026-04-13 | PXD055744 | Pride

Pseudomonas aeruginosa

Project description:Pseudomonas aeruginosa Raw sequence reads

| PRJNA1107491 | ENA

Pseudomonas aeruginosa

Project description:Pseudomonas aeruginosa Raw sequence reads

| PRJNA373830 | ENA

Pseudomonas aeruginosa

Project description:Pseudomonas aeruginosa Raw sequence reads

| PRJNA420113 | ENA