白细胞介素13抑制肾小球系膜细胞增殖及白细胞介素6表达

目的:探讨白细胞介素13(IL-13)对体外培养的大鼠系膜细胞的增殖及其产生白细胞介素6(IL-6)的影响。方法:用四甲基偶氮唑(MTT)法测定系膜细胞增殖,用逆转录聚合酶链反应(RT-PCR)及酶联免疫吸附法(ELISA)测定系膜细胞IL-6mRNA表达及其蛋白水平。结果:IL-13在1、10、100μg/L浓度范围呈剂量依赖性地抑制系膜细胞的增殖;5%FCSRPMI1640培养条件下系膜细胞IL-6mRNA表达及IL-6分泌水平较低,脂多糖(LPS)可刺激系膜细胞IL-6mRNA的表达及提高IL-6分泌水平,而IL-13可抑制LPS诱导的系膜细胞IL-6分泌及其mRNA表达。结论:IL-13抑制体外培养的系膜细胞增殖及LPS诱导的系膜细胞IL-6的产生,IL-13可能对于肾小球肾炎的系膜细胞炎症反应具有拮抗作用。

Inhibitory effect of interleukin-13 on cell proliferation and interleukin-6 production in mesangial cells

AIM:To investigate the effect of interleukin-13 (IL-13) on cell proliferation and interleukin-6 (IL-6) production in mesangial cells.RESULTS:IL-13(1 μg/L-100 μg/L) inhibited the proliferation of mesangial cell in a dose-dependent manner. Both mRNA and protein of IL-6 in mesangial cells were increased significantly in the presence of LPS and this increase could be reversed by IL-13 (1μg/L-100μg/L). However, this increase could not be reversed by IL-13 if the dose was lower than 0.1μg/L and if the mesangial cells were cultured in 5% FCS RPMI1640. CONCLUSION:IL-13 could inhibit IL-6 expression induced by LPS in mesangial cells . We suggested that IL-13 may be an inhibitory cytokine in the regulation of the mesangial cell proliferaltion and inflammatory reaction in glomerulonephritis.