中国寄生虫学与寄生虫病杂志

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细粒棘球蚴病患者血清特异性IgG亚型抗体的检测

张颋1,2,陈英1,张俊瑞3,王东4,鄂正隆3,冯宇4,莫筱瑾1,孙德健1,徐斌1 *,胡薇1   

  1. 1 中国疾病预防控制中心寄生虫病预防控制所,卫生部寄生虫病原与媒介生物学重点实验室,世界卫生组织疟疾、血吸虫病和丝虫病合作中心,上海 200025;2 复旦大学附属华山医院消化病研究所,上海 200040;3 甘肃省环县地方病防治办公室,庆阳 745700;4 甘肃省疾病预防控制中心寄生虫病预防控制所,兰州 730020
  • 出版日期:2015-04-30 发布日期:2015-05-04

Assessment of Serum IgG and Its Subclasses in Cystic Echinococcosis Patients and Its Application for Diagnosis

ZHANG Ting1,2,CHEN Ying1,ZHANG Jun-rui3,WANG Dong4,E Zheng-long3,FENG Yu4,MO Xiao-jin1,SUN De-jian1,XU Bin1*,HU Wei1   

  1. 1 National Institute of Parasitic Diseases,Chinese Center for Disease Control and Prevention;Key Laboratory of Parasite and Vector Biology,Ministry of Health;WHO Collaborating Center for Malaria,Schistosomiasis and Filariasis,Shanghai 200025,China;2 Division of Gastroenterology, Huashan Hospital,Fudan University,Shanghai 200040,China;3 The Endemic Disease Prevention Office in Huan County,Gansu Province,Qingyang 745700,China;4 Institute of Parasitic Diseases,Gansu Province Center for Disease Control and Prevention,Lanzhou 730020,China
  • Online:2015-04-30 Published:2015-05-04

摘要:

目的  用细粒棘球蚴囊液抗原检测甘肃省环县地区细粒棘球蚴病患者血清中特异性IgG及其亚型抗体。  方法  采集甘肃省环县地区经B超确诊的37例细粒棘球蚴病患者和29例健康人血清,ELISA法检测血清中抗棘球蚴囊液抗原的特异性IgG抗体及其亚型IgG1、IgG2和IgG4。应用MedCalc软件,以B超检测结果为金标准,根据ELISA结果绘制受试者工作特征(ROC)曲线,通过曲线下面积的配对z检验,比较这4种抗体的诊断性能差异,确定最佳诊断阈值。用卡方检验分析并比较棘球蚴囊液抗原用于检测4种抗体的灵敏性和特异性。  结果  用囊液抗原检测IgG、IgG1、IgG2和IgG4抗体的ROC曲线下面积分别为0.722、0.919、0.712和0.835,其中IgG1的曲线下面积显著大于IgG和IgG2的面积(P<0.05)。棘球蚴囊液抗原检测这4种抗体的灵敏性分别为54.1%、91.9%、67.6%和75.7%,其中IgG1的灵敏性高于IgG、IgG2和IgG4(P<0.05);特异性分别为89.7%、82.8%、72.4%和89.7%,IgG1的特异性与IgG、IgG2和IgG4相比,差异无统计学意义(P>0.05)。检测IgG4抗体在CEⅠ-Ⅲ型病例中的灵敏性高于CEⅣ-Ⅴ型病例(P<0.05)。  结论  棘球蚴囊液抗原检测血清中IgG1抗体的灵敏性优于其他3种抗体,但特异性与其他3种抗体间差异无统计学意义。

关键词: 细粒棘球蚴病, 免疫球蛋白G亚型, 受试者工作特征曲线, 囊液

Abstract:

Objective  To assess the diagnostic performance of hydatid cyst fluid(HCF) in detecting the anti-HCF IgG and its subclasses IgG1, IgG2 and IgG4 in serum of cystic echinococcosis patients.  Methods  ELISA was used to measure IgG and its subclasses IgG1, IgG2, and IgG4 specific for Echinococcus granulosus HCF, in the sera of 37 cystic echinococcosis(CE) patients and 29 healthy subjects in Huan County, Gansu Province. The receiver operating characteristic(ROC) curves of the four antibodies were analyzed by MedCalc software, referenced with the gold-standard B ultrasonic imaging. The diagnostic performances between the four antibodies were compared using paired z statistics based on the areas under the curve(AUC), and the best diagnostic threshold was determined for each. The sensitivity and specificity for detecting the four types of antibodies were compared using Chi-square test.  Results  The AUCs for IgG and its subclasses IgG1, IgG2, and IgG4 were 0.722, 0.919, 0.712, and 0.835, respectively; the AUC of IgG1 was significantly higher than those of IgG(z=3.629, P<0.05) and IgG2(z=3.292, P<0.05). The sensitivity for detecting IgG, IgG1, IgG2, and IgG4 was 54.1%, 91.9%, 67.6%, and 75.7%, respectively; the sensitivity for IgG1 was significantly higher than that for IgG(χ2=3.84, P<0.05), IgG2(χ2=6.80, P<0.05), and IgG4(χ2=10.16, P<0.05). The specificity for the four antibodies was 89.7%, 82.8%, 72.4%, and 89.7%, respectively, and no significant difference was found between them. In addition, the sensitivity for detecting IgG4 antibody was significantly higher in CEⅠ-Ⅲ than in CEⅣ-Ⅴ patients.  Conclusion  The IgG1 antibody shows the highest detection sensitivity by HCF, thus having potential value in diagnosis of cystic echinococcosis.

Key words:  , Cystic echinococcosis;IgG subclass;Receiver operating characteristic curve;Hydatid cyst fluid