Targeting Multidrug-Recalcitrant Pseudomonas aeruginosa Biofilms: Combined-Enzyme Treatment Enhances Antibiotic Efficacy
Pseudomonas aeruginosa is an opportunistic pathogen that forms biofilms during infection, resulting in recalcitrance to antibiotic treatment. Biofilm inhibition is a promising research direction for the treatment of biofilm-associated infections. Here, a combined-enzyme biofilm-targeted strategy was...
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Published in | Antimicrobial agents and chemotherapy Vol. 67; no. 1; p. e0135822 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
American Society for Microbiology
24.01.2023
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Subjects | |
Online Access | Get full text |
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Summary: | Pseudomonas aeruginosa is an opportunistic pathogen that forms biofilms during infection, resulting in recalcitrance to antibiotic treatment. Biofilm inhibition is a promising research direction for the treatment of biofilm-associated infections. Here, a combined-enzyme biofilm-targeted strategy was put forward for the first time to simultaneously prevent biofilm formation and break down preformed biofilms. The
-acylhomoserine lactonase AidH was used as a quorum-sensing inhibitor and was modified to enhance the inhibitory effect on biofilms by rational design. Mutant AidH
exerted maximum activity at the human body temperature and pH and could reduce the expression of virulence factors as well as biofilm-related genes of P. aeruginosa. Subsequently, the P. aeruginosa self-produced glycosyl hydrolase PslG joined with AidH
to disrupt biofilms. Interestingly, under the combined-enzyme intervention for P. aeruginosa wild-type strain PAO1 and clinical strains, no biofilm was observed on the bottom of NEST glass-bottom cell culture dishes. The combination strategy also helped multidrug-resistant clinical strains change from resistant to intermediate or sensitive to many antibiotics commonly used in clinical practice. These results demonstrated that the combined-enzyme approach for inhibiting biofilms is a potential clinical treatment for P. aeruginosa infection. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 Xiaolong Liu and Xinjiong Fan contributed equally to this article. The authors declare no conflict of interest. Yixin Zhang and Wei Wei contributed equally to this article. Author order was determined by drawing straws. |
ISSN: | 0066-4804 1098-6596 |
DOI: | 10.1128/aac.01358-22 |