程序化细胞死亡因子5过表达促进雷公藤内醇酯诱导的类风湿关节炎成纤维样滑膜细胞凋亡

目的:探讨程序化细胞死亡因子5(progrmmed cell death 5,PDCD5)过表达对雷公藤内醇酯(triptolide)诱导类风湿关节炎成纤维样滑膜细胞(rheumatiod arthritis fibroblast-likes synoviocytes,RA FLS)凋亡的作用.方法:体外分离培养RA FLS进行腺病毒Ad-PDCD5(含有PDCD5基因的腺病毒载体)的转染,分别用免疫印迹法和流式细胞术检测Ad-PDCD5转染后的RA FLS中PDCD5蛋白表达及经雷公藤内醇酯处理后的PDCD5蛋白过表达的RAFLS的凋亡率.结果:用感染复数(multiplicity of infection,MOI)分别为50、100、200和300的Ad-PDCD5感染RAFLS 36 h后,PDCD5蛋白表达水平呈现剂量依赖性增加.未经雷公藤内醇酯处理的非感染组、Ad-null组(不含目的基因的空载体)和Ad-PDCD5组RA FLS的凋亡之间差异无统计学意义,经雷公藤内醇酯处理后,其RA FLS的凋亡率分别为(22.51±3.87)%,(28.77±12.97)%和(48.87±12.69)%.表明此腺病毒体系能够有效地使PDCD5蛋白过表达,在RA FLS中,单独使用雷公藤内醇酯或者单独转染PDCD5都不能明显地诱导细胞凋亡,但过表达PDCD5再进行雷公藤内醇酯处理可以诱导细胞凋亡.结论:腺病毒Ad-PDCD5转染使PDCD5过表达,从而能够促进雷公藤内醇酯诱导的RA FLS凋亡,为类风湿关节炎的临床治疗提供了一个可能的干预靶点.

Overexpression of progrmmed cell death 5 factor enhances triptolides-induced fibroblast-like synoviocytes apoptosis in rheumatoid arthritis

Objective:To explore the effect of progrmmed cell death 5(PDCD5)on apoptosis of rheumatoid arthritis fibroblast-like synoviocytes(RA FLS) induced by triptolide.Methods:Cultured synovial cells in vitro from RA patients were transfected with Ad-PDCD5.At protein level,expression of PDCD5 in RA FLS infected with Ad-PDCD5 was detected by Western blot.RA FLS infected with Ad-PDCD5 were cultured in presence or absence of triptolide and apoptosis of RA FLS was determined by flow cytometry.Results:Infection of RA FL...