Poly(ethylene imine)s as antimicrobial agents with selective activity.

Poly(ethylene imine)s as antimicrobial agents with selective activity.
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DOI:
10.1002/mabi.201200052
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发表时间:
2012-09
影响因子:
4.6
通讯作者:
Kuroda, Kenichi
Kuroda, Kenichi
中科院分区:
工程技术3区
文献类型:
--
作者:
Gibney, Katherine A.;Sovadinova, Iva;Lopez, Analette I.;Urban, Michael;Ridgway, Zachary;Caputo, Gregory A.;Kuroda, Kenichi

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我们报告了分子量范围(MW)(500- 12,000)的线性和支化聚(乙烯亚胺)(L-和B-PEI)的抗微生物活性的结构-活性关系。L-和B-PEI对金黄色葡萄球菌的活性均高于大肠杆菌。B-和L-PEI均未引起E. coli细胞质膜。L-PEI诱导S.金黄色葡萄球菌膜,但B-PEI没有。低MW B-PEI引起很少或不引起溶血,而L-PEI是溶血性的。低MW B-PEI对人HEp-2细胞的细胞毒性低于其他PEI。然而,它们在孵育24小时后诱导显著的细胞活力降低。这里呈现的结果突出了聚合物尺寸和结构对活性之间的相互作用。
We report the structure-activity relationship in the antimicrobial activity of linear and branched poly(ethylene imine)s (L- and B-PEIs) with a range of molecular weights (MWs) (500–12,000). Both L- and B-PEIs displayed enhanced activity against Staphylococcus aureus over Escherichia coli. Both B- and L-PEIs did not cause any significant permeabilization of E. coli cytoplasmic membrane. L-PEIs induced depolarization of S. aureus membrane although B-PEIs did not. The low MW B-PEIs caused little or no hemolysis while L-PEIs are hemolytic. The low MW B-PEIs are less cytotoxic to human HEp-2 cells than other PEIs. However, they induced significant cell viability reduction after 24 hours incubation. The results presented here highlight the interplay between polymer size and structure on activity.
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