【摘要】 目的　探讨酶联免疫吸附法 (ELISA)检测抗异质性胞核核糖核蛋白A2 (hnRNPA2 ) /类风湿关节炎 (RA) 33抗体在不同风湿性疾病患者中的阳性率及对RA早期诊断的意义。方法　以纯化的重组蛋白hnRNPA2为抗原 ,用ELISA检测RA 179例、系统性红斑狼疮 (SLE) 14 1例、其他弥漫性结缔组织病 (CTD) 97例、血清阴性脊柱关节病 (SPA) 30例、骨关节炎 (OA) 10例、关节痛 /关节炎5 9例、正常对照 4 0名 ,比较抗hnRNPA2 /RA33抗体在各组人群中的阳性率 ,并评价其与RA患者临床和实验室检查指标间的关系及早期诊断的价值。结果　抗hnRNPA2 /RA33抗体在RA患者中的敏感性为 36 9%、特异性为 87 1% ,在SLE、其他CTD、SPA和OA患者中阳性率分别为 19 2 %、7 2 %、6 8%和 0。抗hnRNPA2 /RA33抗体在早期RA患者中的阳性率为 4 3 3%。结论　以纯化的重组蛋白hnRNPA2为抗原的ELISA是检测抗hnRNPA2 /RA33抗体 ,早期诊断RA的可靠方法。更多还原

【Abstract】 Objective To detect anti-heterogeneous nuclear ribonucleoprotein A2 (hnRNP A2)/RA33 antibody by ELISA with the purified recombinant hnRNP A2 antigen. Methods The serum of 179 patients with RA, 141 patients with SLE, 97 patients with other diffused rheumatic diseases, 30 patients with seronegative spondyloarthropathies, 10 patients with osteoarthritis, 59 patients with arthralgia/arthritis and 40 controls were detected. In addition, clinical characters and laboratory indexes were compared to study the significance of anti-hnRNP A2/RA33 antibody in RA. Results The sensitivity and specificity of anti-hnRNP A2/RA33 antibody in RA were 36.9% and 87.1%. The positive rates of anti-hnRNP A2/RA33 antibody in SLE, other CTD, seronegative spondyloarthropathies and OA were 19.2%, 7.2%, 6.8% and 0. The positive rate of anti-hnRNP A2/RA33 antibody was 43.3% in early RA patients. Conclusion Detection of anti- hnRNP A2/RA33 antibody with purified recombinant hnRNP A2 antigen is a reliable method for early diagnosis of RA.更多还原