辅助性T17相关细胞因子在系统性红斑狼疮患者血浆中的变化及意义

目的 探讨系统性红斑狼疮(SLE)患者血浆辅助性T(Th)17相关细胞因子白细胞介素(IL)-17、IL-22、IL-23和IL-27水平变化及意义.方法 采用酶联免疫吸附试验法检测45例SLE患者及32名健康人血浆IL-17、IL-22、IL-23和IL-27水平,分析它们之间及其与疾病活动和临床特征的关系.2组资料的比较采用非参数Mann-Whitney U检验,相关分析采用Spearman秩相关.结果 SLE患者血浆IL-17和IL-23水平明显高于对照组[77.8(25.4～87.6)pg/ml和36.4(15.7～338.2)pg/ml;14.7(<7.8～247.5)pg/ml和<7.8(<7.8～81.7)pg/ml,P均<0.01],非活动组与活动组差异无统计学意义;SLE组IL-22水平较对照组明显降低[77.4(<15.6～559.7)pg/ml和378.8(21.8～1154.2)pg/ml,P<0.01],且活动组明显低于非活动组(P<0.01);与对照组相比,SLE组IL-27水平有升高的趋势,但差异无统计学意义(P>0.05).SLE患者血浆IL-17与IL-23水平呈正相关(P均<0.01);IL-22水平与SLE疾病活动指数(SLEDAI)积分、红细胞沉降率、抗双链DNA(dsDNA)滴度呈负相关(P均<0.01),与C3水平呈正相关(P<0.05);各细胞因子水平与临床表现和药物治疗无关.结论 SLE患者外周血Th17细胞因子反应异常,IL-17和IL-22在SLE病理生理中的作用不同,IL-23/IL-27失衡可能促进Th17介导的炎症.

Th17-related cytokine profiles in plasma of patients with systemic lupus erythemtosus

Objective To analyze the levels of T helper(Th)17-related cytokines interleukin(IL)-17,IL-22,IL-23 and IL-27 in plasma of patients with systemic lupus erythematosus(SLE).Methods Plasma IL-17,IL-22,IL-23 and IL-27 levels were measured by enzyme-linked immunosorbent assay in 45SLE patients and 32 healthy controls and their associations with each other,disease activity and clinical features were evaluated.Results Plasma levels of IL-17 and IL-23 were significantly higher in SLE patients than in controls[77.8(25.4～487.6)pg/ml vs 36.4(15.7～338.2)pg/ml;14.7(<7.8～247.5) pg/ml vs <7.8(<7.8～81.7)pg/ml.both P<0.01].with no difference between active and inactive disease.In contrast,IL-22 levels were markedly decreased in SLE patients compared with the controls[77.4(<15.6～559.7)pg/ml vs 378.8(21.8～1154.2)pg/ml,P<0.01]and were lower in active disease than in inactive disease(P<0.01).IL-27 levels tended to be higher in SLE patients compared with controls,but the difference was not significant (P>0.05).A strong and positive correlation was found between IL-17 and IL-23 levels(P<0.01)in SLE patients.IL-22 levels were negatively correlated with SLEDAI score,erythrocyte sedimentation rate and antidsDNA antibody titers(all P<0.01),and positively correlated with C3 levels (P<0.05).Each cytokine levels were not related to specific manifestations and treatments.Conclusion Th17 cytokine response in peripheral blood of patients with SLE is abnormal.and IL-17 and IL-22 appear to play different roles in SLE pathophysiology.IL-23/IL-27 imbalance may contribute to the development of Th17-mediated inflammation in SLE.