Susceptibility of micro-organisms to active oxygen species: sensitivity to the xanthine-oxidase-mediated antimicrobial system.

Susceptibility of micro-organisms to active oxygen species: sensitivity to the xanthine-oxidase-mediated antimicrobial system.
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微生物对活性氧的敏感性:对黄嘌呤氧化酶介导的抗菌系统的敏感性。

DOI:
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发表时间:
1987
期刊:
Journal of General Microbiology
影响因子:
--
通讯作者:
J. Jidoi
J. Jidoi
中科院分区:
--
文献类型:
--
作者:
Y. Yamada;H. Saito;H. Tomioka;J. Jidoi

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以乙醛为底物的黄嘌呤氧化酶(XOA系统)产生超氧阴离子和过氧化氢,但该系统的杀菌活性较弱。在 XOA 系统(XOA-Fe-EDTA 系统)中添加 Fe2+ 和 EDTA 增加了对金黄色葡萄球菌、大肠杆菌、单核细胞增生李斯特菌和鼠伤寒沙门氏菌的杀菌活性,但结核分枝杆菌和白色念珠菌仍然具有高度耐药性。过氧化氢酶(H2O2 清除剂)和甘露醇(.OH 清除剂)几乎完全抑制 XOA-Fe-EDTA 系统的杀菌活性,而 SOD(O2- 清除剂)的抑制作用较小。叠氮化物(1O2 清除剂)不会引起这种抑制。结果表明 .OH、H2O2 和 O2- 在 XOA-Fe-EDTA 介导的抗菌系统中可能作为效应分子发挥作用。特定细菌对活性氧的抵抗力与内源性活性氧清除剂的水平之间不存在相关性。
Xanthine oxidase with acetaldehyde as substrate (the XOA system) generated superoxide anion and hydrogen peroxide, but this system had only weak bactericidal activity. Addition of Fe2+ and EDTA to the XOA system (XOA-Fe-EDTA system) increased bactericidal activity against Staphylococcus aureus, Escherichia coli, Listeria monocytogenes and Salmonella typhimurium, although both Mycobacterium tuberculosis and Candida albicans remained highly resistant. Catalase (H2O2 scavenger) and mannitol (.OH scavenger) almost completely inhibited the bactericidal activity of the XOA-Fe-EDTA system whereas SOD (O2- scavenger) was less inhibitory. Azide (1O2 scavenger) caused no such inhibition. The results suggest the possible role of .OH, H2O2 and O2- in the XOA-Fe-EDTA-mediated antimicrobial system, as effector molecules. There was no correlation between resistance of a given bacterium to active oxygen and the level of endogenous active oxygen-scavengers.
氧中间体的分泌:在活化巨噬细胞的效应功能中的作用。
DOI: --
发表时间: 1982
期刊: Federation proceedings
影响因子: --
作者:
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通讯作者: Nathan,CF
铁和乙二胺四乙酸在超氧阴离子生成系统的杀菌活性中的作用。
DOI: 10.1016/0003-9861(81)90539-7
发表时间: 1981
影响因子: 3.9
作者:
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DOI: 10.1021/bi00260a030
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通讯作者: Klebanoff,SJ