目的分析新型冠状病毒(SARS-CoV-2,简称新冠病毒)特异性抗体IgM、IgG对新型冠状病毒肺炎(COVID-19,简称新冠肺炎)的诊断价值。方法1)收集2020年3月上旬在本院发热门诊就诊的全部145名患者的新冠病毒IgM、IgG抗体(胶体金法)和核酸(荧光定...目的分析新型冠状病毒(SARS-CoV-2,简称新冠病毒)特异性抗体IgM、IgG对新型冠状病毒肺炎(COVID-19,简称新冠肺炎)的诊断价值。方法1)收集2020年3月上旬在本院发热门诊就诊的全部145名患者的新冠病毒IgM、IgG抗体(胶体金法)和核酸(荧光定量PCR法)检测结果(发热组),做配对卡方检验;2)收集3月5日当天做新冠病毒IgM、IgG抗体检测的612名新冠肺炎确诊患者(来自本院2月~3月作为新冠肺炎定点治疗医院收治的1500名新冠肺炎患者)的新冠病毒IgM、IgG抗体检测结果(新冠肺炎组),并跟踪随访患者出院后30、60 d的新冠病毒IgM、IgG抗体和核酸检测结果;通过对各组(间)的统计分析,明确抗体检测阳性率及抗体变化趋势等。结果1)发热组:新冠病毒抗体IgM阳性、IgG阳性及IgM合并IgG双阳性的比例分别为26.21%(38/145)、54.48%(79/145)及26.21%(38/145)(P<0.01);核酸检测阳性率4.14%(6/145)低于抗体阳性率(P<0.01);IgM和IgG均为阴性而核酸检测阳性的比例为0.69%(1/145)。2)新冠肺炎组:以2~98 d为观察时段,抗体阳性率由5%(1/20)逐渐增至97.8%(87/89);>56 d阳性率平缓下降。2~14 d的IgM阳性率5%(1/20)、IgG阳性率65%(13/20),≥14~56 d IgM阳性率47.68%(277/581)、IgG阳性率94.15%(547/581),≥56 d IgM、IgG阳性率均下降。所有患者住院期间IgM抗体阳性率45.8%(280/612),IgG抗体阳性率93.1%(570/612)。出院后(其中15名患者因转入他院治疗无后期复查数据)1和2个月的新冠病毒核酸检测均为阴性,出院后2个月IgG阳性率≥80%(487/597)、IgM阳性率≥40%(240/597)。结论胶体金法能很好地检测新冠病毒IgM、IgG抗体,阳性率高于核酸检测,其中IgG抗体产生早,阳性率高,持续时间长;联合应用胶体金抗体检测与核酸检测方法有助于提高新冠肺炎确诊和疑似病例的排除诊断。展开更多
SARS-CoV-2 infection is a serious threat to human life and health all over the world,and COVID-19 is a global epidemic caused by SARS-CoV-2 infection.SARS-CoV-2 is highly infectious,strange and variable.Therefore,the ...SARS-CoV-2 infection is a serious threat to human life and health all over the world,and COVID-19 is a global epidemic caused by SARS-CoV-2 infection.SARS-CoV-2 is highly infectious,strange and variable.Therefore,the treatment of COVID-19 must be urgent and targeted.However,vaccines and currently used drugs generally do not have the above-mentioned characteristics.Although convalescent plasma of COVID-19 has shown a clinical application value in the emergency treatment of critical patients,it shows great limitations.All human recombinant multivalent neutralizing nano-antibodies may meet the deficiency of COVID-19 therapy.Gene engineering technologies have been used to develop specific neutralizing antibody(nAB)drugs for the treatment of COVID-19 worldwide.Some of the candidate nAB drugs have been entered the clinical trials and can be used for the therapy of COVID-19 shortly.In the present review,we studied and analyzed n ABs for the treatment of COVID-19 and the progress and prospect from the following five aspects:1)The biological and clinical characteristics of SARS-CoV-2 infection;2)The feasibility of plasma therapy for convalescents with COVID-19;3)The technical routes of developing n Ab drugs;4)The current status of developing global COVID-19 antibodies;5)The difficulties and clinical use.展开更多
文摘目的分析新型冠状病毒(SARS-CoV-2,简称新冠病毒)特异性抗体IgM、IgG对新型冠状病毒肺炎(COVID-19,简称新冠肺炎)的诊断价值。方法1)收集2020年3月上旬在本院发热门诊就诊的全部145名患者的新冠病毒IgM、IgG抗体(胶体金法)和核酸(荧光定量PCR法)检测结果(发热组),做配对卡方检验;2)收集3月5日当天做新冠病毒IgM、IgG抗体检测的612名新冠肺炎确诊患者(来自本院2月~3月作为新冠肺炎定点治疗医院收治的1500名新冠肺炎患者)的新冠病毒IgM、IgG抗体检测结果(新冠肺炎组),并跟踪随访患者出院后30、60 d的新冠病毒IgM、IgG抗体和核酸检测结果;通过对各组(间)的统计分析,明确抗体检测阳性率及抗体变化趋势等。结果1)发热组:新冠病毒抗体IgM阳性、IgG阳性及IgM合并IgG双阳性的比例分别为26.21%(38/145)、54.48%(79/145)及26.21%(38/145)(P<0.01);核酸检测阳性率4.14%(6/145)低于抗体阳性率(P<0.01);IgM和IgG均为阴性而核酸检测阳性的比例为0.69%(1/145)。2)新冠肺炎组:以2~98 d为观察时段,抗体阳性率由5%(1/20)逐渐增至97.8%(87/89);>56 d阳性率平缓下降。2~14 d的IgM阳性率5%(1/20)、IgG阳性率65%(13/20),≥14~56 d IgM阳性率47.68%(277/581)、IgG阳性率94.15%(547/581),≥56 d IgM、IgG阳性率均下降。所有患者住院期间IgM抗体阳性率45.8%(280/612),IgG抗体阳性率93.1%(570/612)。出院后(其中15名患者因转入他院治疗无后期复查数据)1和2个月的新冠病毒核酸检测均为阴性,出院后2个月IgG阳性率≥80%(487/597)、IgM阳性率≥40%(240/597)。结论胶体金法能很好地检测新冠病毒IgM、IgG抗体,阳性率高于核酸检测,其中IgG抗体产生早,阳性率高,持续时间长;联合应用胶体金抗体检测与核酸检测方法有助于提高新冠肺炎确诊和疑似病例的排除诊断。
基金China Postdoctoral Science Foundation(Grant No.2020T1300011ZX)National Science and Technology Major Project(Grant No.2018ZX10712001)Key Research and Development Projects of Tianjin Science and Technology Committee(Grant No.17YFZCSY00660)。
文摘SARS-CoV-2 infection is a serious threat to human life and health all over the world,and COVID-19 is a global epidemic caused by SARS-CoV-2 infection.SARS-CoV-2 is highly infectious,strange and variable.Therefore,the treatment of COVID-19 must be urgent and targeted.However,vaccines and currently used drugs generally do not have the above-mentioned characteristics.Although convalescent plasma of COVID-19 has shown a clinical application value in the emergency treatment of critical patients,it shows great limitations.All human recombinant multivalent neutralizing nano-antibodies may meet the deficiency of COVID-19 therapy.Gene engineering technologies have been used to develop specific neutralizing antibody(nAB)drugs for the treatment of COVID-19 worldwide.Some of the candidate nAB drugs have been entered the clinical trials and can be used for the therapy of COVID-19 shortly.In the present review,we studied and analyzed n ABs for the treatment of COVID-19 and the progress and prospect from the following five aspects:1)The biological and clinical characteristics of SARS-CoV-2 infection;2)The feasibility of plasma therapy for convalescents with COVID-19;3)The technical routes of developing n Ab drugs;4)The current status of developing global COVID-19 antibodies;5)The difficulties and clinical use.