Distribution of quorum-sensing genes (lasI, lasR, RhlI, and rhlR) among clinical isolates of biofilm-forming Pseudomonas aeruginosa in Northern Iran - Report - MDSpire
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Distribution of quorum-sensing genes (lasI, lasR, RhlI, and rhlR) among clinical isolates of biofilm-forming Pseudomonas aeruginosa in Northern Iran
Distribution of quorum-sensing genes among biofilm-forming Pseudomonas aeruginosa in Northern Iran
Overview
This study investigated the prevalence of quorum-sensing genes lasI, lasR, rhlI, and rhlR in 100 clinical biofilm-forming Pseudomonas aeruginosa isolates from Northern Iran. The findings highlight the critical role of these QS genes in biofilm production and suggest potential targets for therapeutic intervention.
Background
Pseudomonas aeruginosa is an opportunistic pathogen responsible for severe infections, particularly in immunocompromised patients. Its ability to form biofilms contributes significantly to antibiotic resistance and chronic infection development. Quorum sensing (QS) systems, especially the Las and Rhl systems, regulate biofilm formation and virulence factor expression through signaling molecules. Understanding the distribution of QS genes in clinical isolates can inform strategies to combat multidrug-resistant strains.
Data Highlights
100 clinical isolates of P. aeruginosa were collected from various hospitals in Northern Iran between 2023 and 2024. The presence of QS genes lasI, lasR, rhlI, and rhlR was assessed among biofilm-forming isolates. Statistical parameters ensured a 95% confidence interval with a 0.097% error rate for sample size determination.
Key Findings
All four quorum-sensing genes (lasI, lasR, rhlI, rhlR) were prevalent among clinical biofilm-forming P. aeruginosa isolates.
The Las QS system genes (lasI and lasR) were found to dominate and regulate the Rhl system genes.
Presence of QS genes correlated strongly with biofilm production capability in clinical isolates.
QS-regulated biofilm formation contributes to increased antibiotic resistance and virulence in P. aeruginosa.
The study fills a regional knowledge gap regarding QS gene prevalence in Northern Iran clinical isolates.
Clinical Implications
Detection of quorum-sensing genes in clinical isolates can guide the development of novel anti-biofilm therapies targeting QS pathways. Understanding the hierarchical regulation of Las over Rhl systems may help in designing interventions to disrupt biofilm formation and reduce multidrug resistance. This knowledge is critical for managing persistent infections caused by P. aeruginosa in hospital settings.
Conclusion
The high prevalence of lasI, lasR, rhlI, and rhlR genes among biofilm-forming P. aeruginosa isolates underscores the importance of quorum sensing in infection persistence and antibiotic resistance. Targeting these QS systems offers a promising avenue for therapeutic strategies against multidrug-resistant P. aeruginosa infections.
References
World Health Organization 2017 -- Global priority list of antibiotic-resistant bacteria to guide research, discovery, and development of new antibiotics
Pseudomonas aeruginosa biofilm formation and quorum sensing mechanisms -- Various Authors
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