四种抗体联合检测在SLE患者中的诊断价值

目的 探讨抗双链DNA(dsDNA)抗体、抗Smith(Sm)抗体、抗核小体抗体(AnuA)、抗组蛋白抗体联合检测在系统性红斑狼疮(SLE)患者中的诊断价值.方法 抗dsDNA抗体、抗Sm抗体、AnuA、抗组蛋白抗体均采用欧蒙斑点法测定98例SLE患者(分为活动期和稳定期)、90例其他结缔组织病患者及40例健康人血清中的四种自身抗体.结果 98例SLE患者中抗dsDNA抗体、抗Sm抗体、AnuA、抗组蛋白抗体阳性率分别为45.9%、 29.6%、 57.1%、33.6%,特异性分别为100%、99.2%、98.5%、89.2%;抗dsDNA抗体和AnuA在活动期SLE中的敏感性与稳定期相比差异有统计学意义(P<0.05);抗dsDNA抗体和AnuA以及四种抗体联合检测时阳性率分别为70.4%和79.6%,明显高于其中任何单项检测的阳性率,且明显高于疾病对照组,差异有统计学意义(P<0.05).结论 所检测的四种抗体在SLE中都具有很高的特异性和敏感性,其中抗dsDNA抗体和AnuA对活动期SLE具有很好的诊断价值,抗体的联合检测可较大程度提高SLE检测阳性率,四种抗体有明显的互补作用,尤其抗dsDNA抗体和AnuA的联合检测具有很好的组合价值.Abstract：Objective To investigate the diagnostic significance of combined detection of anti-double stranded DNA antibody(anti-dsDNA),anti-Smith antibody(anti-Sm)and antinuclesome antibody(AnuA) and anti-histone antibody in systemic lupus erythematosus(SLE),and evaluate the significance of combined detection of these autoantibodies in the diagnosis of SLE. Methods Ninety-eight cases of SLE patients who were divided into active and stable stage group and 90 disease controls and 40 healthy people were detected with Euro immunoblot assay.Results In the assays mentioned above. The serum positive rates of anti-dsDNA,anti-Sm, AnuA and anti-histone antibody were 45.9%,29.6%,57.1% and 33.1% in SLE, and the specificities were 100%,99.2%,98.5% and 89.2% respectively in patients with SLE.The positive rates of anti-dsDNA and AnuA in active SLE group were 57.5%,65.1%,which was apparently higher than that in the stable stage group;The sensibility of combined detection of anti-dsDNA and AnuA was 70.4%, four autoantibodies combined detection in SLE was 79.6%, which was apparently higher than any single autoantibodies, the difference had statistical significance. Conclusions These four autoantibodies have very high sensibility and specificity respectively, combined detection of four autoantibodies can markedly raise the relevance ratio in SLE, while their specificity didn't have a visual reduction. Especially, the sensibility of combined detection of anti-dsDNA and AnuA can markedly increased in active SLE patients. This compose can raise effectively the diagnosis of active SLE.So the detections of the four antibodies are complementary for the diagnosis of SLE.

The diagnostic significance of combined detection of four autoantibodies in systemic lupus erythematosus

Systemic lupus erythematosus Anti-double stranded DNA antibody Anti-Smith antibody Antinuclesome antibody Anti-histone antibody Sensibility Specificity