首页> 外文期刊>International journal of immunopharmacology >Hydroxyl radical scavengers inhibit TNF-alpha production in mononuclear cells but not in polymorphonuclear leukocytes.
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Hydroxyl radical scavengers inhibit TNF-alpha production in mononuclear cells but not in polymorphonuclear leukocytes.

机译:羟基自由基清除剂抑制单核细胞中TNF-α的产生,但不抑制多形核白细胞中的TNF-α的产生。

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摘要

The hydroxyl radical (HO*) scavengers dimethylthiourea (DMTU), tetramethylthiourea (TMTU), dimethylsulfoxide (DMSO) and deferoxamine (DFX), the latter being an iron chelator which prevents HO* formation by blocking the Fenton reaction, were found to inhibit TNF-alpha production in LPS-stimulated human PBMC but not in PMN. Furthermore, this effect was not LPS-specific, as TNF-alpha production was reduced by HO* radical scavengers to a similar extent upon stimulation of PBMC with immune complexes (IC), concanavalin A (Con A) and phorbol myristate acetate (PMA). Other scavengers such as glutathione (GSH), N-acetylcysteine (NAC), ascorbic acid (ASC) and mannitol (MAN) do not have effect on the production of TNF-alpha either in PBMC or PMN. These results provide evidence that the participation of ROI in the regulation of TNF-alpha production differ in different cell types. Particularly, the data presented in this work indicate that HO* radicals have a central role in the production of this inflammatory cytokine by human PBMC.
机译:发现羟基自由基(HO *)清除剂二甲基硫脲(DMTU),四甲基硫脲(TMTU),二甲基亚砜(DMSO)和去铁胺(DFX),后者是一种铁螯合剂,可通过阻止Fenton反应来防止HO *形成,从而抑制TNF。在LPS刺激的人PBMC中产生α-α,而在PMN中不产生。此外,该作用不是LPS特异的,因为在用免疫复合物(IC),伴刀豆球蛋白A(Con A)和佛波醇肉豆蔻酸酯乙酸盐(PBA)刺激PBMC后,HO *自由基清除剂可将TNF-α的产生减少的程度相似。 。谷胱甘肽(GSH),N-乙酰半胱氨酸(NAC),抗坏血酸(ASC)和甘露醇(MAN)等其他清除剂在PBMC或PMN中均不影响TNF-α的产生。这些结果提供了证据,表明在不同细胞类型中,ROI对TNF-α产生的调节参与程度不同。特别是,这项工作中提供的数据表明,HO *自由基在人PBMC产生这种炎性细胞因子中具有重要作用。

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