J Antimicrob Chemother:抗菌肽IARR-Anal10可有效控制耐药菌所致的感染

2018-05-04 MedSci MedSci原创

全球抗生素耐药性的增加对公众健康构成威胁。抗菌肽(AMPs)是传统抗生素的一种潜在有效替代品。因此,我们测试了来自Branchiostoma japonicum的AMP mBjAMP1的类似物,通过添加和/或替换氨基酸来增加对革兰氏阴性菌的抗菌活性。方法:我们比较了mBjAMP1类似物对革兰氏阴性菌标准株和52株从患者身上分离的肺炎克雷伯氏菌的抗菌活性。评估抗生物膜活性和细胞毒性,然后进一步研究作

全球抗生素耐药性的增加对公众健康构成威胁。抗菌肽(AMPs)是传统抗生素的一种潜在有效替代品。因此,我们测试了来自Branchiostoma japonicum的AMP mBjAMP1的类似物,通过添加和/或替换氨基酸来增加对革兰氏阴性菌的抗菌活性。

方法:
我们比较了mBjAMP1类似物对革兰氏阴性菌标准株和52株从患者身上分离的肺炎克雷伯氏菌的抗菌活性。评估抗生物膜活性和细胞毒性,然后进一步研究作用机制。

结果:
类似肽表现出比mBjAMP1更强的抗菌和抗菌膜活性。具体而言,类似物IARR-Anal10不仅显示出最大的抗菌活性和抗菌膜活性,而且对人红细胞或其他哺乳动物细胞没有毒性。 IARR-Anal10对细菌外膜渗透性,膜极化或膜完整性几乎没有影响。相反,IARR-Anal10似乎可与细菌DNA结合,DNA凝胶阻滞测定中证明了这一点。因此,IARR-Anal10可能通过进入细胞内杀死细菌。此外,我们还证实,IARR-Anal10抑制肺炎克雷伯菌的毒力效果与替加环素相似。值得注意的是,尽管美罗培南和替加环素在短时间内都能发挥抗菌作用,但IARR-Anal10并未诱发肺炎克雷伯菌产生耐药性。

结论:
这些结果表明IARR-Anal10是治疗由对替加环素和美罗培南耐药的细菌引起的感染的一种有希望的药物。

原始出处:

Park J, Kang HK, et al., Antibacterial activity and mechanism of action of analogues derived from the antimicrobial peptide mBjAMP1 isolated from Branchiostoma japonicum. J Antimicrob Chemother. 2018 Apr 30. doi: 10.1093/jac/dky144. 

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    2018-08-15 AspirantSuo
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    2018-11-07 xjy02
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    2019-03-03 经常头晕
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    2018-05-04 1ddf0692m34(暂无匿称)

    学习了.长知识

    0

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