Anionic amphiphilic dendrimers as antibacterial agents.

Anionic amphiphilic dendrimers as antibacterial agents.
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DOI:
10.1021/ja806912a
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发表时间:
2008-11-05
影响因子:
15
通讯作者:
Grinstaff, Mark W.
Grinstaff, Mark W.
中科院分区:
化学1区
文献类型:
--
作者:
Meyers, Steven R.;Juhn, Frank S.;Griset, Aaron P.;Luman, Nathanael R.;Grinstaff, Mark W.

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报道了一种阴离子两亲性树枝状聚合物,与真核细胞相比,其对原核细胞具有增加的细胞毒理学效力。树枝状聚合物对枯草芽孢杆菌(一种革兰氏阳性细菌菌株)的半数最大有效浓度(EC 50)测量为4.1×10−5 M,而对人脐静脉内皮细胞(HUVEC)的EC 50值为1.5×10−3 M,高出36倍以上。除了类似的合成树枝状结构外,两种商业两亲物十二烷基硫酸钠(SDS)和Triton X-100的EC 50比率至多仅为3.8倍。此外,所观察到的EC 50值似乎与溶液中的临界聚集常数(CAC)相关,这表明这些阴离子两亲性树枝状聚合物与其超分子结构相关的作用机制。
An anionic amphiphilic dendrimer is reported that possesses increased cytotoxicological potency against prokaryotic cells compared to eukaryotic cells. The half maximal effective concentration (EC50) for the dendrimer against Bacillus subtilis, a Gram-positive bacterial strain, was measured to be 4.1×10−5 M, while that against human umbilical vein endothelial cells (HUVEC) was more than 36x greater at a value of 1.5×10−3 M. EC50 ratios for two commercial amphiphiles, sodium dodecyl sulfate (SDS) and Triton X-100, in addition to a similar synthesized dendritic structure were at most only 3.8x greater. Furthermore, the observed EC50 values appear to be correlated to the critical aggregation constant (CAC) in solution suggesting a mechanism of action for these anionic amphiphilic dendrimers related to their supramolecular structures.
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