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Targeting polyelectrolyte networks in purulent body fluids to modulate bactericidal properties of some antibiotics

机译:靶向化脓性体液中的聚电解质网络以调节某些抗生素的杀菌性能

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The response of the human immune system to most bacterial infections results in accumulation of neutrophils at infection sites that release a significant quantity of DNA and F-actin. Both are negatively charged polyelectrolytes that can interact with positively charged host defense molecules such as cathelicidin-delivered LL-37 peptide or other cationic antibiotic agents. Evaluation of the ability of bacterial outgrowth (using luminescence measurements or counting colony-forming units) to form a biofilm (quantified by crystal violet staining) and analysis of the structure of DNA/F-actin network by optical microscopy in human pus samples treated with different antibiotics in combination with plasma gelsolin, DNAse 1, and/or poly-aspartic acid revealed that bactericidal activity of most tested antibacterial agents increases in the presence of DNA/F-actin depolymerizing factors.
机译:人类免疫系统对大多数细菌感染的反应导致嗜中性粒细胞在感染部位蓄积,并释放出大量的DNA和F-肌动蛋白。两者都是带负电荷的聚电解质,可以与带正电荷的宿主防御分子(如cathelicidin递送的LL-37肽或其他阳离子抗生素)相互作用。评估细菌生长的能力(使用发光测量或计数菌落形成单位)形成生物膜(通过结晶紫染色量化)的能力,并通过光学显微镜通过DNA显微镜分析处理过的人脓液样本中DNA / F-肌动蛋白网络的结构不同的抗生素与血浆凝溶胶蛋白,DNAse 1和/或聚天冬氨酸的组合显示,在DNA / F-肌动蛋白解聚因子的存在下,大多数测试的抗菌剂的杀菌活性会增加。

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