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Drug Potentiation of Macrophage Function

机译:巨噬细胞功能的药物增强

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The mechanism by which macrophages kill facultative intracellular parasites is not known. A test system is described utilizing human macrophages derived from blood monocytes and the opportunistic pathogen Listeria monocytogenes. In this system, bacterial killing was impaired under hypoxic conditions. Under aerobic conditions, addition of Clofazimine (B663), a phenazine derivative effective in the treatment of human leprosy, potentiated the killing of Listeria by macrophages. Potentiation occurred at drug concentrations usually attainable in man and which are not directly injurious to the bacteria. The enhanced bactericidal activity occurred only in the presence of oxygen; the drug induced increased leukocyte oxygen consumption which was insensitive to cyanide.
机译:巨噬细胞杀死兼性细胞内寄生虫的机制尚不清楚。描述了一种利用源自血液单核细胞的人巨噬细胞和机会性病原体单核细胞增生李斯特菌的测试系统。在该系统中,低氧条件下的细菌杀伤力受损。在有氧条件下,添加对人麻风病有效的吩嗪衍生物氯芬齐明(B663),可增强巨噬细胞杀死 Listeria 的能力。增强作用发生在通常在人体内可以达到的药物浓度下,并且不会直接对细菌造成伤害。增强的杀菌活性仅在氧气存在下才会发生。该药物导致白细胞耗氧量增加,这对氰化物不敏感。

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