IL-22对人气道细胞的作用

目的 探讨IL-22对人气道上皮细胞、气道平滑肌细胞、气道成纤维细胞的生理学作用.方法 用实时定量PCR 检测气道上皮细胞、气道平滑肌细胞、气道成纤维细胞哮喘血清刺激前后IL-22R1 mRNA表达的变化.不同浓度的IL-22(10 ng/ml,100 ng/ml,1 000 ng/ml)刺激气道上皮细胞、气道平滑肌细胞和气道成纤维细胞后,用MTT法检测细胞的增殖,用流式细胞技术(FACS)检测细胞的凋亡和坏死.结果 哮喘血清刺激后气道上皮细胞IL-22R1 mRNA表达降至正常对照组的9%,气道平滑肌细胞IL-22R1 mRNA表达升高至正常对照组的345倍,而气道成纤维细胞IL-22R1 mRNA表达无明显变化.高剂量(1 000 ng/ml)的IL-22刺激气道上皮细胞和气道成纤维细胞12、24 h可显著降低细胞增殖(P<0.05,P<0.01).三种不同浓度的IL-22刺激气道上皮细胞24 h后均导致细胞凋亡显著下降(P<0.05),低浓度的IL-22(10 ng/ml)导致细胞坏死增加(P<0.01).不同浓度的IL-22刺激气道平滑肌细胞后,细胞凋亡和坏死无显著性变化.中、高浓度IL-22(100 ng/ml,1 000 ng/ml)刺激气道成纤维细胞后,细胞坏死率显著下降(P<0.05).结论 IL-22在支气管哮喘中对气道上皮的作用具有双重性,并与支气管哮喘的病程相关;而对气道平滑肌细胞的作用则可能与浓度及病程相关.支气管哮喘后续阶段,IL-22对气道成纤维细胞作用轻微.

The effect of IL-22 on human airway structural cell

Objective To study the role of IL-22 on human airway epithelial cells,airway smooth muscle cell and airway fibroblasts.Methods IL-22R1 mRNA of the above three cells in different groups were measured by real-time PCR.Cell proliferation of such three cells were stimulated by IL-22 of different concentrations in different groups were measured by MTT assay.Cell apoptosis and necrosis in the above group were measured by FACS.Results IL-22 mRNA of airway epithelial cells stimulated by asthmatic sera was significa...