抗瓜氨酸化蛋白抗体联合检测在类风湿关节炎中诊断价值的分析

目的 分别检测抗核周因子(APF)、抗角蛋白抗体(AKA)、抗环瓜氨酸肽(CCP)抗体,比较3种抗体在类风湿关节炎(RA)诊断中的敏感性和特异性,并探讨3种抗体联合检测在RA中的诊断价值.方法 选取2006-2008年在北京大学人民医院风湿免疫科就诊、具有关节症状的各种风湿病患者551例,其中,RA患者304例,其他风湿病患者247例.所有患者均检测APF、AKA和抗CCP抗体,其中J前两者采用间接免疫荧光法(IIF)检测,后者采用酶联免疫吸附试验(ELISA)法检测.结果 抗CCP抗体、AKA和APF对RA诊断的敏感性分别为76.2%、43.6%和34.5%,特异性分别为96.0%、98.4%和99.6%;3种抗体中任一抗体阳性对RA诊断的敏感性和特异性分别为77.3%和94.7%;3种抗体中任2项抗体阳性对RA诊断的敏感性和特异性分别为48.4%和99.2%,而3种抗体均阳性对RA诊断的特异性达100%,但敏感性仅28.3%.结论 3种抗瓜氨酸化蛋白抗体中,以抗CCP抗体对RA的诊断价值最高,联合检测抗CCP抗体、AKA和APF并不能显著提高对RA的诊断价值.

Combined detection of anti-citrullinated protein antibodies in the diagnosis of rheumatoid arthritis

Objective Antibodies against citrulline-containing peptides such as anti-perinuclear factor (APF), anti-keratin antibodies (AKA), anti-filaggrin antibodies (AFA) and anti-cyclic citruilinated peptide (CCP) antibodies are very specific in RA. In recent years, detection of APF, AKA and anti-CCP antibodies have been widely used in clinical practice. Studies on the combined detection of these ACPA in diagnosing RA are limited in number. The aim of this study is to detect combined examination of APF, AKA, and anti-CCP antibodies and compare their values in the diagnosis of rheumatoid arthritis. The significance of combined detection of these ACPAs in rheumatoid arthritis is also investigated. Methods Five hunndred and fifly-one patients who suffered from arthritic problems during the recent two years were selected from the Department of Rheumatology and Immunology of Peking University People's Hospital. 304 of the patients were RA and 247 were diagnosed to have other rheumatic diseases based on the corresponding classification criteria. AKA and APF were tested by indirect immunofluorescence assay. Anti-CCP antibodies were tested antibodies, AKA and APF tests for RA were 76.2%, 43.6%, and 34.5%, respectively, and the specificities were highest specificity (100%), but it had a rather low sensitivity (28.3%). When two of the three ACPA were positive, the sensitivity and specificity for the diagnosis of RA was 48.4% and 99.2%, respectively. When either anti-CCP antibodies, AKA, or APF was treated as an individual parameter, the sensitivity was slightly increased (77.3%). However, the specificity decreased to 94.7%. Conclusion Anti-CCP antibodies are the most helpful makers for the diagnosis of rheumatoid arthritis among the three ACPAs which are used in clinical practice. The combined detection of anti-CCP antibodies, AKA, and APF cannot increase the diagnostic sensitivity and specificity of rheumaotid arthritis.