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异烟肼处理结核分枝杆菌H37Ra提取物产生活性氧的证据。

Evidence for the generation of active oxygen by isoniazid treatment of extracts of Mycobacterium tuberculosis H37Ra.

作者信息

Shoeb H A, Bowman B U, Ottolenghi A C, Merola A J

出版信息

Antimicrob Agents Chemother. 1985 Mar;27(3):404-7. doi: 10.1128/AAC.27.3.404.

Abstract

Crude extracts of Mycobacterium tuberculosis H37Ra, an isonicotinic acid hydrazide (isoniazid) (INH)-susceptible strain which has peroxidase activity, catalyzed the production of catechol from phenol in the presence of INH and H2O2 as shown by the development of the 444-nm absorption peak of oxidized catechol product. Extracts of the INH-resistant strain of M. tuberculosis H37Ra, which has no peroxidase, did not catalyze the reaction. The rate of development of the 444-nm peak increased proportionately with increased superoxide dismutase concentrations. The hydroxyl radical (. OH) scavengers dimethylsulfoxide and mannitol inhibited the reaction. Isonicotinamide, isonicotinic acid, and nicotinic acid could not replace INH.

摘要

结核分枝杆菌H37Ra的粗提物是一种对异烟肼(INH)敏感且具有过氧化物酶活性的菌株,在INH和H2O2存在的情况下,它能催化苯酚生成邻苯二酚,这可通过氧化邻苯二酚产物在444nm处吸收峰的出现得以证明。没有过氧化物酶的耐INH结核分枝杆菌H37Ra菌株的提取物则不能催化该反应。444nm峰的出现速率随超氧化物歧化酶浓度的增加而成比例增加。羟基自由基(·OH)清除剂二甲亚砜和甘露醇可抑制该反应。异烟酰胺、异烟酸和烟酸不能替代INH。

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本文引用的文献

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The susceptibility of strains of Mycobacterium tuberculosis to catalase-mediated peroxidative killing.
J Gen Microbiol. 1980 Dec;121(2):381-6. doi: 10.1099/00221287-121-2-381.
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Response of Mycobacteria to ultraviolet light radiation.分枝杆菌对紫外线辐射的反应。
Am Rev Respir Dis. 1973 Nov;108(5):1175-85. doi: 10.1164/arrd.1973.108.5.1175.
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Peroxidase-mediated oxidation of isoniazid.过氧化物酶介导的异烟肼氧化反应。
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