吲哚美辛对脂多糖引起的人类风湿性关节炎滑膜细胞中白介素-6表达的影响

目的研究吲哚美辛对脂多糖引起的人类风湿性关节炎（RA）成纤维状滑膜细胞(FLS)中白介素-6（IL-6）表达的影响。方法用放免分析法检测IL-6蛋白的表达水平； RT-PCR方法测定IL-6 mRNA的表达水平。结果LPS处理对FLS中IL-6表达无显著影响； LPS刺激的U937细胞培养液上清液可明显增强FLS 中IL-6蛋白分泌及mRNA表达； 吲哚美辛可显著抑制上述变化，且其抑制作用随浓度的增加而增强。结论吲哚美辛可抑制LPS刺激的U937细胞培养上清液引起的FLS中IL-6的表达。

Effect of indomethacin on expression of interleukin-6 caused by lipopolysaccharide in rheumatoid arthritic patients' synoviocyte]

AIM: To study the effects of indomethacin on interleukin-6 (IL-6) expression stimulated with lipopolysaccharide (LPS) in rheumatoid arthritic patients' synoviocyte. METHODS: Fibroblast-like cells (FLS) from rheumatoid arthritic patients' joint tissue were cultured for 24 h and incubated 24 h with LPS (1 mg.L-1) or the supernatant of U937 cells stimulated by LPS (1 mg.L-1). After indomethacin or dexamethasone added into the supernatant of U937 cells, FLS was incubated with the super natant for 24 h. The expression of IL-6 protein was detected by radioimmunoassay. The mRNA expression of IL-6 was accessed by RT-PCR. RESULTS: LPS did not obviously affect the growth of FLS, and the protein secretion and mRNA expression of IL-6 were not changed in FLS treated with LPS. The IL-6 secretion and IL-6 mRNA expression were significantly increased in FLS cultured with the supernatant from U937 cell treated with LPS. Indomethacin at concentrations of 1 x 10(-7)-1 x 10(-5) mol.L-1 obviously inhibited the protein secretion and mRNA expression of IL-6 in FLS cultured with the supernatant from U937 cell stimulated with LPS, and the inhibitory effects increased as the concentrations of indomethacin increased. CONCLUSION: Indomethacin can inhibit the increase of IL-6 expression caused by supernatant of U937 cells stimulated with LPS in FLS.