Telechelic, Antimicrobial Hydrophilic Polycations with Two Modes of Action.

Telechelic, Antimicrobial Hydrophilic Polycations with Two Modes of Action.
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具有两种作用模式的遥爪抗菌亲水聚阳离子

DOI:
10.1002/mabi.201700389
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发表时间:
2018
影响因子:
4.6
通讯作者:
J.C. Tiller
J.C. Tiller
中科院分区:
工程技术3区
文献类型:
--
作者:
L. Richter;M. Hijazi;F. Arfeen;C. Krumm;J.C. Tiller

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具有季铵(quat)端基的螺旋状抗微生物聚(2-恶唑啉)显示为针对革兰氏阳性细菌菌株的有效抗微生物聚合物。在本研究中,通过将具有两个双末端基团的聚(2-甲基-2-恶唑啉)水解为聚(乙烯亚胺)(PEI),额外实现了对革兰氏阴性菌大肠杆菌的活性。所得的遥爪聚阳离子对金黄色葡萄球菌和E.杆菌PEI骨架的贡献通过测量钙离子存在下的抗微生物活性来确定。PEI对整体活性的影响强烈地取决于分子量,并且随着质量的增加而增加。PEI主导对E的活性。大肠杆菌的质量比对照低。金黄色的双末端基团需要十二烷基或更长的烷基取代基来主导抗微生物活性。此外,PEI和β-端基协同作用。
Telechelic antimicrobial poly(2‐oxazoline)s with quaternary ammonium (quat) end groups are shown to be potent antimicrobial polymers against Gram‐positive bacterial strains. In this study, the activity against the Gram‐negative bacteriumEscherichia coliis additionally implemented by hydrolyzing the poly(2‐methyl‐2‐oxazoline) with two quart end groups to poly(ethylene imine) (PEI). The resulting telechelic polycations are active againstStaphylococcus aureusandE. coli. The contribution of the PEI backbone is determined by measuring the antimicrobial activity in the presence of calcium ions. The influence of PEI on the overall activity strongly depends on the molecular weight and increases with higher mass. The PEI dominates the activity againstE. coliat lower masses than againstS. aureus. The quart end groups require an alkyl substituent of dodecyl or longer to dominate the antimicrobial activity. Additionally, PEI and quart end groups act synergistically.
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