摘要目的 探讨系统性红斑狼疮(SLE)患者外周血单个核细胞(PBMCs)中磷脂酶C-γ1、磷脂酶C -γ2的表达水平及其与SLE疾病活动性的相关性.方法 运用半定量聚合酶链反应(RT-PCR)法,检测30例SLE患者与25名健康对照人的磷脂酶C-γ1与磷脂酶C-γ2 mRNA表达水平,并采用Pearson相关性检验分析它们与补体C3、C4、抗双链DNA (dsDNA)抗体及SLE疾病活动指数(SLEDAI)积分的相关性.结果 ①SLE组与健康对照组相比,磷脂酶C-γ1与磷脂酶C-γ2 mRNA表达显著增高(分别为P＜0.01)；②磷脂酶C-γ1与磷脂酶C-γ2 mRNA表达水平之间呈正相关(r=0.726,P＜0.01)；③SLE组磷脂酶C-γ1 mRNA表达水平与补体C3、C4、抗dsDNA抗体均无相关性,而与SLEDAI积分呈正相关(r=0.002,P＜0.05).磷脂酶C-γ2与补体C3、C4呈显著负相关(r=-0.914,P＜0.01；r=-0.829,P＜0.05),与抗dsDNA抗体正相关(r=0.171,P＜0.05),与SLEDAI积分相关性不明显.结论 本研究发现SLE患者磷脂酶C-γ1与磷脂酶C-γ2的表达水平在SLE患者中增高,磷脂酶C-γ1与SLEDAI积分呈正相关,磷脂酶C-γ2与补体C3、C4呈负相关,与抗dsDNA抗体正相关,可能对SLE患者的诊断和病情评估有较大价值.

abstractsObjective To investigate the expression levels of phospholipase C(PLC)-γ1 and PLC-γ2 in the peripheral blood mononuclear cells (PBMCs) of patients with systemic lupus erythematosus (SLE),and explore the relations between these genes expression levels and disease activity of SLE.Methods Reverse transcription polymerase chain reaction (RT-PCR) method was used to detect the expression levels of PLC-γ1 and PLC-γ2 in 30 patients with SLE and 25 controls.The associations between the expression levels of PLC- γ1 and PLC-γ2,complement C3,C4,antidouble stranded DNA antibody and SLEDAI scores in patients with SLE were analyzed by Pearson correlation analysis.Results ①The expression levels of PLC-γ1 and PLC-γ2 in the SLE patients were significantly higher than those of the normal controls (P＜0.01).) The expression levels of PLC-γ1 and PLC-γ2 showed positive correlations with each other (r=0.726,P＜0.01 ).③ The expression levels of PLC-γ2 were negatively correlated with serum complement C3,C4 (P＜0.05),but positively correlated with anti-double stranded DNA antibody,at the same time,they were not correlated with SLEDAI scores (P＞0.05).There was no correlation between complement C3,C4,anti-double stranded DNA antibody and the expression levels of PLC-γ1 (r=0.220,0.256,0.116,P＞0.05),but the expression levels of PLC-γ1 were positively correlated with SLEDAI scores.Conclusion We have shown that the expression levels of PLC-γ1 and PLC-γ2 is positively correlated and the PLC-γ1 and PLC-γ2 in patients with SLE are significantly higher than those of the normal controls.PLC-γ2 is negatively associated with complement C3,C4,PLC-γ1 is positively correlated with SLEDAI scores.Both PLC-γ1 and PLC-γ2 are be helpful in evaluating SLE disease activity and severity.