Anti-biofilm efficacy of nitric oxide-releasing silica nanoparticles.
Anti-biofilm efficacy of nitric oxide-releasing silica nanoparticles.
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DOI:
10.1016/j.biomaterials.2009.01.052
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发表时间:
2009-05
期刊:
影响因子:
14
通讯作者:
Schoenfisch, Mark H.
中科院分区:
文献类型:
--
作者:
Hetrick, Evan M.;Shin, Jae Ho;Paul, Heather S.;Schoenfisch, Mark H.
The ability of nitric oxide (NO)-releasing silica nanoparticles to kill biofilm-based microbial cells is reported. Biofilms of Pseudomonas aeruginosa, Escherichia coli, Staphylococcus aureus, Staphylococcus epidermidis, and Candida albicans were formed in vitro and exposed to NO-releasing silica nanoparticles. Replicative viability experiments revealed that ≥ 99% of cells from each type of biofilm were killed via NO release, with the greatest efficacy (≥ 99.999% killing) against gram-negative P. aeruginosa and E. coli biofilms. Cytotoxicity testing demonstrated that the highest dose of NO-releasing silica nanoparticles inhibited fibroblast proliferation to a lesser extent than clinical concentrations of currently-administered antiseptics (e.g., chlorhexidine) with proven wound-healing benefits. This study demonstrates the promise of employing nanoparticles for delivering an antimicrobial agent to microbial biofilms.
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