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Dual-Action Biomaterial Surfaces with Quorum Sensing Inhibitor and Nitric Oxide To Reduce Bacterial Colonization
Aditi Taunk1, Renxun Chen1, George Iskander1
1School of Chemistry, UNSW Sydney, Sydney, NSW 2052, Australia.
ACS Biomaterials Science & Engineering
|January 9, 2021
Summary
Novel antibacterial coatings combining dihydropyrrolones (DHPs) and nitric oxide (NO) show enhanced efficacy in preventing bacterial colonization on medical devices. This dual-action approach offers a promising strategy against device-related infections.
Area of Science:
- Biomaterials Science
- Infectious Disease Research
- Surface Chemistry
Background:
- Bacterial biofilms on medical devices cause significant infections.
- Multidrug resistance necessitates novel antibacterial strategies.
- Quorum sensing (QS) inhibition and nitric oxide (NO) show potential for combating biofilms.
Purpose of the Study:
- To develop and evaluate dual-action surface coatings incorporating QS inhibitors (dihydropyrrolones, DHPs) and NO.
- To assess the antibiofilm efficacy of these novel coatings against common pathogens.
Main Methods:
- Surface functionalization with DHPs and NO.
- Characterization using X-ray photoelectron spectroscopy (XPS) and contact angle measurements.
- Assessment of NO release via Griess assay.
- Evaluation of bacterial colonization using confocal laser scanning microscopy (CLSM).
Main Results:
- Successful immobilization of DHPs and NO on surfaces was confirmed.
- NO release from coatings was detected at 24 hours.
- DHP+NO coatings significantly reduced Staphylococcus aureus and Pseudomonas aeruginosa colonization compared to single-component coatings.
Conclusions:
- The combined DHP and NO coating exhibits superior antibiofilm activity through a non-bactericidal mechanism.
- This dual-action strategy holds significant potential for preventing device-related bacterial infections.
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