抗嗜中性粒细胞胞浆抗体检测对韦格纳肉芽肿诊断及活动性…

应用间接免疫荧光法（ⅡＦ）检测２０４例患者及４８名健康成人血清抗嗜中性粒细胞胞浆抗体（ＡＮＣＡ）。韦格纳肉芽肿（ＷＧ）患者ＡＮＣＡ阳性率为７５％，明显高于正常对照组及其它疾病组。ＦＬＩＳＡ试验证明，髓过氧化物酶（ＭＰＯ）是核周型ＡＣＡ（Ｐ－ＡＮＣＡ）的主要抗原。活动期ＷＧ患者胞浆型ＡＮＣＡ（Ｃ＝ＡＮＣＡ）常阳性，且滴度高，稳定期Ｃ－ＡＮＣＡ转阴或滴度明显下降。结果提示Ｃ－ＡＮＣＡ对ＷＧ的诊断有较高

Detection of antineutrophil cytoplasmic antibodies for the values of Wegener''s granulomatosis diagnosis and activity judgment]

OBJECTIVE: To investigate the clinical significance of antineutrophil cytoplasmic antibodies (ANCA) in Wegener's granulomatosis (WG) and other diseases. METHOD: Indirect immunofluorescence was applied to detect serum ANCA of 204 patients and 48 normal controls. Enzyme-linked immunosorbent assay (ELISA) was used to detect antimyeloperoxidase (MPO) antibodies. RESULTS: The frequency of ANCA in sera of WG patients was 75% and significantly higher than those in sera of other groups (P < 0.05). ELISA demonstrated that MPO was the major antigen recognized by perinuclear ANCA (P-ANCA). Cytoplasmic ANCA (C-ANCA) was always positive and high titers in sera of active WG patients, but turned to negative or low titers in remission. CONCLUSION: These results suggested that C-ANCA was specific for WG and was a marker for disease activity in WG. P-ANCA wasn't specific for WG, but related to vasculitis.