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- W4386084711 abstract "Recent studies indicate that carbon monoxide-releasing molecules (CORMs), a class of organometallic compounds, exert antibacterial activities through the delivery of carbon monoxide (CO) molecules. We developed a new-class CO-delivery system by conjugating classical low-molecular-weight CORMs (i.e., [Ru(CO)3Cl2]2 and Mn(CO)5Br) onto a positively charged carrier, polyimidazolium (PIM), giving cationic CO-releasing polymers Ru@PIM and Mn@PIM, respectively. Compared with low-molecular-weight CORMs, our polymeric CO vehicles showed improved water solubility, reduced cytotoxicity, significantly extended CO-releasing duration, and enhanced antimicrobial ability against both planktonic and biofilm microorganisms. Ru@PIM and Mn@PIM inhibited the growth of a broad spectrum of free Gram-positive and Gram-negative bacteria as well as fungus with the lowest minimum inhibitory concentration (MIC) at 8 μg/mL. They were effective in preventing pathogenic Pseudomonas aeruginosa biofilm formation with biofilm reduction by more than 92% at 16 μg/mL and 99% at 32 μg/mL. They also demonstrated potent dispersal efficacy on recalcitrant well-established biofilms through a synergetic activity with a biofilm log10 reduction of 2.5-3.2 ≥ 64 μg/mL and nearly 2.0 at the concentration of as low as 16 μg/mL. This CO-releasing system may retain long-time antimicrobial ability after the complete release of CO molecules owing to the cationic structure. The novel CO-releasing polymers have great potential as antimicrobial and antibiofilm agents in biomedical applications." @default.
- W4386084711 created "2023-08-24" @default.
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- W4386084711 date "2023-08-23" @default.
- W4386084711 modified "2023-10-12" @default.
- W4386084711 title "Cationic Carbon Monoxide-Releasing Polymers as Antimicrobial and Antibiofilm Agents by the Synergetic Activity" @default.
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- W4386084711 doi "https://doi.org/10.1021/acsami.3c02898" @default.
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