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首页> 外文期刊>The Journal of Antibiotics: An International Journal >Oligomerization of esculin improves its antibacterial activity and modulates antibiotic resistance
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Oligomerization of esculin improves its antibacterial activity and modulates antibiotic resistance

机译:七叶皂苷的低聚可改善其抗菌活性并调节抗生素抗性

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In this particular study, the antibacterial activity of esculin and oligomer fractions was assessed. MIC values of esculin and its oligomer fractions as well as of some antibiotics against Gram-positive and Gram-negative strains and against Escherichia coli multiresistant variants were determined by the standard broth microdilution method. Both esculin and oligoesculin fractions exhibited antibacterial effect against reference strains; Staphylococcus aureus, Enterococcus faecalis, Salmonella enteritidis and Salmonella typhimurium. It appears that E3 oligomer fraction had the greatest antibacterial activity against these reference strains. Besides, as E2 and E3 revealed the best antibacterial effect against multiresistant variants of E. coli, we decided to test the effect of each, combined to the antibiotic against which the variants were resistant. In the interaction study, E2 and E3 oligoesculin fractions were found to be effective in reducing the resistance of E. coli 6574 to ofloxacin and the resistance of E. coli 6228 to amoxicillin. Only E3 oligoesculin fraction showed a synergetic interaction with amoxicillin and tetracyclin against E. coli 6708, but no interaction was found either with E2 or E3 fractions against E. coli 6234. Our study allowed us to conclude that oligomerization of esculin increases its antibacterial potential, according to the degree of polymerization.
机译:在这项特殊的研究中,对七叶树素和低聚物级分的抗菌活性进行了评估。通过标准肉汤微量稀释法测定七叶菌素及其寡聚体级分以及一些针对革兰氏阳性和革兰氏阴性菌株以及针对大肠杆菌多耐药变体的抗生素的MIC值。七叶树素和低聚七叶树素级分均显示出对参考菌株的抗菌作用。金黄色葡萄球菌,粪肠球菌,肠炎沙门氏菌和鼠伤寒沙门氏菌。看来E3低聚物部分对这些参考菌株具有最大的抗菌活性。此外,由于E2和E3对大肠杆菌的多重耐药变体显示出最佳的抗菌效果,因此我们决定测试每种变体与该变体所耐药的抗生素的组合。在相互作用研究中,发现E2和E3寡七碳烯馏分可有效降低大肠杆菌6574对氧氟沙星的耐药性和大肠杆菌6228对阿莫西林的耐药性。仅E3寡聚球蛋白级分与阿莫西林和四环素对大肠杆菌6708有协同作用,但与E2或E3分离级对大肠杆菌6234没有相互作用。我们的研究使我们得出结论,七叶红素的寡聚化增加了其抗菌潜力,根据聚合度。

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