目的:探讨趋化因子受体CCR6及CCR8在系统性红斑狼疮(SLE)患者外周血单一核细胞(PBMC)中的表达及与疾病的相关性。方法:收集93例确诊的SLE患者和30例正常对照者的PBMC,提取RNA。应用RT—PCR方法检测研究对象CCR6、CCR8mRNA表达水平。记录患者临床表现及实验室检查结果。结果:@CCR6mRNA在PBMC中表达水平:活动期组(0.985±0.257)与对照组(0.229±0.041)相比,两者差异有统计学意义(t=2.910,P=0.006)。活动期组与非活动期组(0.306±0.034)、非活动期组与对照组、患者组(0.641±0.179)与对照组,3组间差异均无统计学意义(P〉0.05)。CCR8 mRNA在PBMC中表达水平:活动期组(0.703±0.285)与非活动期组(0.219±0.031)及对照组(0.120±0.018)间比较,差异无统计学意义(P〉0.05);非活动期组与对照组、患者组(0.549±0.663)与对照组,两组间差异无统计学意义(P〉0.05)。②患者组CCR6 mRNA水平与疾病活动度评分关系:SLE患者组PBMC中CCR6 mRNA表达水平与SLE疾病活动程度指数(SLEDAI)分别作直线相关性分析,CCR6 mRNA水平与SLEDAI(r=0.457,t:4.513,P〈0.001)呈正相关。③患者分为两个亚组:具有某些临床表现的与不具临床表现的CCR6 mRNA及CCR8 mRNA表达,差异无统计学意义。结论:CCR6 mRNA表达水平在活动期SLE患者比非活动期及对照组增高,与SLEDAI呈正相关。CCR8 mRNA表达水平在SLE患者组与正常对照组差异无统计学意义。CCR6可能参与SLE的发生。
Objective: To investigate the expression of chemokine receptors in the patients with systemic lupus erythematosus (SLE) and its correlation to SLE disease activity index (SLEDAI). Methods: The mRNA expression of CCR6 and CCR8 on the peripheral blood mononuelear cells(PBMC) of 93 SLE patients and 30 healthy controls were detected by reverse transcription-polymerase chain reaction (RT-PCR). Results: The mRNA level of CCR6 in patients with SLE (0.985±0.257)was significantly higher than that of normal controls (0.229±0.041)(t = 2.910,P= 0.006), with positive correlation to the SLEDAI. There was no difference in the level of CCR8 expression. Conclusions: These results suggest that CCR6 might be involved in the pathogenesis of SLE, and the CCR6 level might be a good indicator for the disease activity of SLE.