抗角蛋白抗体在类风湿关节炎的临床意义

Presence of antikeratin antibodies in patients with rheumatoid arthritis

目的研究抗角蛋白抗体(AKA)在类风湿关节炎(RA)的临床意义。方法98例RA患者及70例其他风湿性疾病患者测定血清抗角蛋白抗体,对两组病人AKA阳性率进行比较,并对抗角蛋白抗体与类风湿因子(RF)对RA诊断的敏感性和特异性进行比较,同时对RA患者AKA阳性组和AKA阴性组的关节肿胀指数、关节压痛指数、握力、晨僵时间、休息痛和RF、血沉、C反应蛋白、影像学检查以及关节外表现等临床指标进行比较,对资料进行统计分析。结果RA患者AKA阳性率明显高于其他风湿性疾病患者(P<0.001);AKA对于RA诊断较RF更具特异性;RA患者中AKA阳性组较AKA阴性组病情严重,除握力外各项观察指标比较均有统计学意义(P<0.05)。结论AKA检测对RA诊断、病情预测和指导治疗均有较高的临床价值。

Objective To study the significance of antikeratin antibodies(AKA) in rheumatoid arthritis(RA). Method Serum samples of 98 patients with RA and 70 rheumatic disease controls were tested by indirect immunofluorescence assay.The diagnostic specificity and sensitivity of AKA were compared with rheumatoid factor(RF). The features of clinical manifestation and lab findings were compared in patients with RA who were positive for AKA with ones who were negative.Results The positive rate of AKA in RA patients was significantly higher than that in rheumatic disease controls.AKA showed a diagnostic specificity of 97.1%, higher than RF.RA patients who were positive for AKA had more active disease as assessed based on clinical, laboratory tests,and radiological variables, as compared with AKA negative patients. Conclusion AKA showes high disease specificity and has prognostic significance in patients with RA.