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Gram-negative

ABSTRACT: Pseudomonas aeruginosa, Acinetobacter baumannii, Proteus mirablis Genome sequencing and assembly

PROVIDER: PRJNA948358 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR23955890_1.fastq.gz	Fastqsanger.gz
	SRR23955890_2.fastq.gz	Fastqsanger.gz
	SRR23955891_1.fastq.gz	Fastqsanger.gz
	SRR23955891_2.fastq.gz	Fastqsanger.gz
	SRR23955892_1.fastq.gz	Fastqsanger.gz

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Outer membrane vesicle of Pseudomonas aerugionsa

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.

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