کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4358646 1615927 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synergistic effect of antimicrobial peptide arenicin-1 in combination with antibiotics against pathogenic bacteria
موضوعات مرتبط
علوم زیستی و بیوفناوری ایمنی شناسی و میکروب شناسی میکروبیولوژی و بیوتکنولوژی کاربردی
پیش نمایش صفحه اول مقاله
Synergistic effect of antimicrobial peptide arenicin-1 in combination with antibiotics against pathogenic bacteria
چکیده انگلیسی

Arenicin-1, a 21-mer antimicrobial peptide, has been known to exert broad bactericidal activity. In this study, the combination effect of arenicin-1 with conventional antibiotics was investigated and all combinations showed synergistic effects against bacterial strains (fractional inhibitory concentration index ≤ 0.75). In an assay using fluorescent dye 3′-(p-hydroxyphenyl) fluorescein (HPF) and hydroxyl radical scavenger thiourea, we demonstrated that combined treatments of arenicin-1 and antibiotics caused synergistic effects by producing hydroxyl radicals, particularly in bacterial strains treated with the peptide and ampicillin. The oxidative stress induced by arenicin-1 was stimulated by transient depletion of NADH. Flow cytometric analysis with propidium iodide (PI) indicated that MIC of arenicin-1 for combination continued to increase the permeability of the bacterial cytoplasmic membrane, enhancing the entry of erythromycin and chloramphenicol which act as protein synthesis inhibitors. Therefore, arenicin-1 synergizes with antibiotics by means of hydroxyl radical formation or membrane-active mechanisms. This combination therapy allows the use of lower concentrations of arenicin-1 and restores the effectiveness of antibiotics.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Research in Microbiology - Volume 163, Issues 6–7, July–August 2012, Pages 479–486
نویسندگان
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