检验医学 ›› 2020, Vol. 35 ›› Issue (11): 1136-1139.DOI: 10.3969/j.issn.1673-8640.2020.11.012

• 临床应用研究·论著 • 上一篇    下一篇

SARS-CoV-2 N蛋白和S蛋白抗体检测在COVID-19诊断中的应用

田亚玲, 鲁君艳   

  1. 永州市中心医院检验科,湖南 永州 425000
  • 收稿日期:2020-04-09 出版日期:2020-11-30 发布日期:2020-12-01
  • 作者简介:null

    作者简介:田亚玲,女,1969年生,主任技师,主要从事临床检验工作。

Roles of SARS-CoV-2 N protein and S protein antibody determinations in the diagnosis of COVID-19

TIAN Yaling, LU Junyan   

  1. Department of Clinical Laboratory,the Central Hospital of Yongzhou,Yongzhou 425000,Hunan,China
  • Received:2020-04-09 Online:2020-11-30 Published:2020-12-01

摘要:

目的 比较血清严重急性呼吸综合征冠状病毒2(SARS-CoV-2)核衣壳(N)蛋白抗体和刺突(S)蛋白抗体在诊断新型冠状病毒肺炎(COVID-19)中的价值。方法 采用酶联免疫吸附试验(ELISA)检测39例COVID-19患者(COVID-19组)、40例COVID-19疑似患者(疾病对照组)和225名体检健康者(正常对照组)的血清SARS-CoV-2 N蛋白免疫球蛋白(Ig)M、IgG抗体及SARS-CoV-2 S蛋白受体结合域(RBD)IgM、IgG抗体。采用受试者工作特征(ROC)曲线评估各项指标诊断COVID-19的价值。结果 COVID-19组SARS-CoV-2 N蛋白-IgM抗体、IgG抗体及SARS-CoV-2 RBD IgM抗体、IgG抗体的S/CO值均高于疑似病例组(P<0.05)和正常对照组(P<0.05)。ROC曲线分析结果显示,SARS-CoV-2 N蛋白IgM抗体、IgG抗体、IgM+IgG抗体联合检测及SARS-CoV-2 RBD IgM抗体、IgG抗体、IgM+IgG抗体联合检测诊断COVID-19的曲线下面积(AUC)分别为0.949、0.991、0.992、0.994、0.999、0.999。结论 在SARS-CoV-2感染后期,SARS-CoV-2 RBD抗体的诊断效能优于N蛋白抗体。

关键词: 严重急性呼吸综合征冠状病毒2, 核衣壳蛋白, 刺突蛋白, 抗体, 新型冠状病毒肺炎

Abstract:

Objective To compare the roles of serum severe acute respiratory syndrome coronavirus 2(SARS-CoV-2) nucleocapsid(N) protein antibody and spike(S) protein antibody determinations in the diagnosis of corona virus disease 2019(COVID-19). Methods Enzyme-linked immunosorbent assay(ELISA) was used to determine SARS-CoV-2 N protein immunoglobulin(Ig) M and IgG antibodies and SARS-CoV-2 receptor binding domain(RBD) IgM and IgG antibodies in sera of 39 COVID-19 patients(COVID-19 group),40 suspected COVID-19 patients(disease control group) and 225 healthy subjects(healthy control group). Receiver operating characteristic(ROC) curve was used to evaluate the roles of various indicators in diagnosing COVID-19. Results The S/CO values of SARS-CoV-2 N protein IgM antibody and IgG antibody and SARS-CoV-2 RBD IgM antibody and IgG antibody in COVID-19 group were higher than those in disease control group(P<0.05) and healthy control group(P<0.05). ROC curve analysis results showed that the areas under curves(AUC) of SARS-CoV-2 N protein IgM antibody,IgG antibody,IgM+IgG antibodies and SARS-CoV-2 RBD IgM antibody,IgG antibody,IgM+IgG antibodies for the diagnosis of COVID-19 were 0.949,0.991,0.992,0.994,0.999 and 0.999,respectively. Conclusions SARS-CoV-2 RBD antibodies have better diagnostic performance for the diagnosis of COVID-19 than that of SARS-CoV-2 N protein antibodies.

Key words: Severe acute respiratory syndrome coronavirus 2, Nucleocapsid protein, Spike protein, Antibody, Corona virus disease 2019

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