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首页> 外文期刊>Cytokine >Pathogenic bacteria and TNF do not induce production of macrophage migration inhibitory factor (MIF) by human monocytes.
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Pathogenic bacteria and TNF do not induce production of macrophage migration inhibitory factor (MIF) by human monocytes.

机译:病原细菌和TNF不会诱导人单核细胞产生巨噬细胞迁移抑制因子(MIF)。

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摘要

Elevated serum macrophage migration inhibitory factor (MIF) is associated with severe sepsis, but it is not clear whether bacteria stimulate synthesis of MIF by blood leukocytes directly or via induction of TNF. Here we assess production of MIF mRNA and protein by blood leukocytes from healthy human subjects (n=28) following exposure to bacteria commonly associated with sepsis (Escherichia coli and Streptococcus pneumoniae). Bacteria did not increase levels of MIF mRNA or secreted protein. CD14(+) monocytes were the main cell type producing MIF before and after stimulation. Exposure of leukocytes to TNF did not induce MIF. Hence elevated levels of serum MIF observed in sepsis may not reflect MIF produced by blood leukocytes stimulated directly by bacteria or TNF.
机译:血清巨噬细胞迁移抑制因子(MIF)升高与严重败血症有关,但尚不清楚细菌是直接刺激血液白细胞还是通过诱导TNF刺激MIF的合成。在这里,我们评估了健康人(n = 28)的血液白细胞暴露于通常与败血症相关的细菌(大肠杆菌和肺炎链球菌)后产生的MIF mRNA和蛋白。细菌不会增加MIF mRNA或分泌蛋白的水平。 CD14(+)单核细胞是刺激前后产生MIF的主要细胞类型。白细胞暴露于TNF不会诱导MIF。因此,在败血症中观察到的血清MIF水平升高可能无法反映由细菌或TNF直接刺激的血白细胞产生的MIF。

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