摘要：
目的:分析类风湿关节炎(RA)患者外周血单个核细胞中肿瘤坏死因子相关凋亡诱导配体TRAIL、c-FLIP、caspase-8等基因表达情况,探讨其在RA中的临床意义,为RA的临床诊治寻找更有效的途径和方法提供实验基础.方法:采用实时荧光定量PCR的方法检测外周血单个核细胞肿瘤坏死因子相关凋亡诱导配体TRAIL、c-FLIP、caspase-8 mRNA表达水平;采用蛋白免疫印迹法检测PBMC中TRAIL、c-FLIP、caspase-8蛋白表达水平.结果:各组RA患者PBMC的TRAIL、c-FLIP、caspase-8的mRNA表达水平:中活动组(M)中TRAIL的mRNA为(3.26 ±0.78),高于健康对照(N)(1.30 ±0.20,P=0.028).低活动组(L)和高活动组(H)(1.56±0.37、1.83±0.26),略高于健康对照(N)(P=0.048、0.043);L、M、H组c-FLIP mRNA相对表达量分别为1.27±0.28,1.32±.34,1.93±0.40,均高于N组1.08±0.12(P分别为0.035、0.034、0.030),差异有统计学意义;caspase-8 mRNA L、M、H组中分别为(2.77±0.97)、(4.52±0.85)、(2.13±0.44),均高于N组(1.04±0.13,P=0.023,0.012, 0.032).RA患者PBMC中TRAIL、c-FLIP、caspase-8蛋白表达:M组TRAIL蛋白表达明显高于N组(P=0.013 ),H组稍高于N组(P=0.043),L组与N组无明显统计学差异(P=0.058),M组明显高于L、H组(P=0.011,0.021);c-FLIP蛋白表达中M组明显高于N组(P0.05),而M、H组caspase-8蛋白表达明显高于N组(P=0.003,0.001).结论:在RA的不同活动期中,外周血单个核细胞TRAIL、c-FLIP和caspase-8等表达水平总体趋势增加,可为RA的临床诊治及后续研究提供实验参考.%Objective:To analyze the expression of TNF-related apoptosis-inducing factor TRAIL,c-FLIP and caspase-8 in peripheral blood mononuclear cells of patients with rheumatoid arthritis at different period,in order to provide a experimental basis that treating and looking for a more effective way and method.Methods:mRNA expression of TRAIL,c-FLIP and caspase-8 were detected by Real-time PCR from peripheral blood mononuclear cells;TRAIL,c-FLIP and caspase-8 were checked by Western blot from peripheral blood mononuclear cells.Results:The mRNA expression level of TRAIL,c-FLIP and caspase-8 from PBMC at different groups of RA:TRAIL mRNA in group M was 3.26±0.78 which was much higher than healthy controls(1.30±0.20) (P=0.028),and those of group L and group H (1.56±0.37 and 1.83±0.26 respectively) was slightly higher than controls(P 0.05). Conclusion:During the different active stages of RA,in peripheral blood mononuclear cells,the expression of TRAIL,c-FLIP and caspase-8 are increased overall trend,possible can provide certain experimental reference for clinical therapy.
