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.
Schoenfisch, Mark H.
中科院分区:
工程技术1区
文献类型:
--
作者:
Hetrick, Evan M.;Shin, Jae Ho;Paul, Heather S.;Schoenfisch, Mark H.

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一氧化氮(NO)释放二氧化硅纳米颗粒杀死生物膜微生物细胞的能力被报道。铜绿假单胞菌、大肠杆菌、金黄色葡萄球菌、表皮葡萄球菌和白色念珠菌在体外形成生物膜,并暴露于释放no的二氧化硅纳米颗粒中。复制活力实验表明,NO释放杀伤率均≥99%,其中对革兰氏阴性铜绿假单胞菌和大肠杆菌生物膜的杀伤率最高(≥99.999%)。细胞毒性测试表明,最高剂量释放no的二氧化硅纳米颗粒对成纤维细胞增殖的抑制程度低于目前临床使用的抗菌药物(如氯己定),并已证实具有伤口愈合作用。这项研究证明了利用纳米颗粒将抗菌剂输送到微生物生物膜的前景。
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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