GUT: IBD中的抗TNF治疗是通过巨噬细胞IL-10信号发挥其治疗作用的

2019-10-05 不详 MedSci原创

巨噬细胞白介素(IL)-10信号在预防IBD发生中起着关键作用。先前已经发现抗肿瘤坏死因子(TNF)单克隆抗体可以通过Fcγ受体(FcγR)信号起作用,并促进促炎性肠巨噬细胞重新极化为CD206 +调节表型。但是尚未检测IL-10在抗TNF诱导的巨噬细胞复极化中的作用。

背景及目的

巨噬细胞白介素(IL)-10信号在预防IBD发生中起着关键作用。先前已经发现抗肿瘤坏死因子(TNF)单克隆抗体可以通过Fcγ受体(FcγR)信号起作用,并促进促炎性肠巨噬细胞重新极化为CD206 +调节表型。但是尚未检测IL-10在抗TNF诱导的巨噬细胞复极化中的作用。


方法

研究人员使用人类外周血单核细胞和小鼠骨髓衍生的巨噬细胞来研究IL-10的产生和CD206 +调节性巨噬细胞的分化。为了确定抗TNF的功效是否取决于体内的IL-10信号传导以及在哪种细胞类型中,研究人员将CD4 + CD45Rb 高 T细胞转移模型与几种遗传小鼠模型结合使用。


结果

抗TNF疗法以FcγR依赖性方式增加巨噬细胞IL-10的产生,这导致巨噬细胞在体外分化为更具调节性的CD206 +表型。在IBD 的CD4 + CD45Rb 高 T细胞转移模型中,IL-10信号的药理学阻断作用阻止了这些CD206 +调节性巨噬细胞的诱导,并降低了抗TNF治疗的疗效。使用细胞类型特异性IL-10受体突变小鼠,研究人员发现巨噬细胞中的IL-10信号传导而非T细胞中的信号传导对于诱导CD206 +调节性巨噬细胞和抗TNF的治疗反应至关重要。


结论

抗TNF解决肠道炎症的疗效主要取决于巨噬细胞中的IL-10信号传导作用。


原始出处:

Pim J Koelink. Et al. Anti-TNF therapy in IBD exerts its therapeutic effect through macrophage IL-10 signalling. GUT. 2019.


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    2020-08-03 mfx808
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    2019-10-07 bnurmamat
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    2019-10-07 snowpeakxu
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    2019-10-07 jjjiang0202
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