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Human monocytes/macrophages: NO or no NO?

机译:人单核细胞/巨噬细胞:否或否?

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The production of nitric oxide (NO) and other reactive nitrogen intermediates by cytokine-activated rodent cells is an important component of antimicrobial and/or antineoplastic activity of these cells. This pathway involves the oxidation of arginine to citrulline, with the concomitant release of NO by an inducible form of NO synthase (iNOS). Numerous cell types express iNOS after stimulation with bacterial products and/or cytokines. The role of NO and its derivatives in host resistance is a subject of intense investigation in mouse models of infections or neoplasia. Although human cells such as hepatocytes and endothelial cells have been shown to express an inducible NO synthase, the presence of such a pathway in human monocytes/macrophages has been questioned by many investigators and is a subject of great controversy. In this short review, we discuss some salient points of this debate.
机译:细胞因子激活的啮齿动物细胞产生的一氧化氮(NO)和其他反应性氮中间体是这些细胞抗微生物和/或抗肿瘤活性的重要组成部分。该途径涉及精氨酸氧化为瓜氨酸,并伴随可诱导形式的NO合酶(iNOS)释放NO。在用细菌产物和/或细胞因子刺激后,许多细胞类型表达iNOS。 NO及其衍生物在宿主抗性中的作用是感染或瘤形成的小鼠模型中深入研究的主题。尽管已显示人类细胞(例如肝细胞和内皮细胞)表达可诱导的NO合酶,但人类单核细胞/巨噬细胞中这种途径的存在已受到许多研究者的质疑,并且是一个备受争议的主题。在这篇简短的评论中,我们讨论了这场辩论的一些要点。

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