系统性红斑狼疮患者外周血单一核细胞核小体释放水平及其临床意义

Clinical Significance of Nucleosomes Released from Peripheral Blood Mononuclear Cells of Patients with Systemic Lupus Erythematosus

目的研究系统性红斑狼疮(SLE)患者外周血单一核细胞(PBMC)释放核小体的水平变化及其与自身抗体、病情活动度的关系。方法应用ELISA方法检测SLE患者PBMC裂解上清液核小体及其血清自身抗体水平,用SLEDAI积分法评估SLE活动度。结果活动期SLE患者PBMC释放核小体的平均水平为(39.39±25.70)IU/mL,明显高于正常人对照组(11.73±7.87)IU/mL和静止期SLE患者(13.44±8.82)IU/mL,并且与其凋亡率呈显著正相关(r=0.83,P<0.001);SLE患者PBMC的核小体释放水平与SLEDAI积分数、ds鄄DNA抗体水平和补体C3降低水平均呈显著正相关(P值分别<0.01、0.01和0.05)。结论SLE患者PBMC凋亡产生的核小体水平变化与SLE临床病情活动程度密切相关,提示核小体可能是诱导SLE发病的重要抗原之一。

Objective To assess the levels of nucleosomes released from peripheral blood mononu-clear cells(PBMC)of patients with systemic lupus erythematosus(SLE),and their relationship with auto-antibodies as well as disease activity.Methods Levels of both nucleosomes released from PBMC and vari-ous auto-antibodies were detected by ELISA in sera from SLE patients.The disease severity was evaluated using SLEDAI(systemic lupus erythematosus disease activity index)system.Results Levels of nucleosomes released from PBMC were significantly higher in patients with active SLE than those of patients with inactive disease and normal controls(39.39±25.70,13.44±8.82,and11.73±7.87IU/mL,respectively).There was a significant positive correlation between nucleosome levels and SLEDAI scores,serum ds-DNA auto-an-tibody levels,and low C3levels.Conclusion Nucleosomes released from apoptotic PBMC of patients with SLE is closely correlated to disease activity,which implies that nucleosomes may play an important role in the pathogenesis of SLE.