Background Hepatitis C virus （HCV） core antigen assays have been produced to exclude infectious donations collected during the preseroconversion window phase （PWP）. For the same purpose, we evaluated the specifici...Background Hepatitis C virus （HCV） core antigen assays have been produced to exclude infectious donations collected during the preseroconversion window phase （PWP）. For the same purpose, we evaluated the specificity and sensitivity of a novel hepatitis C virus NS3 antigen detection immunoassay and the application of this assay in clinical diagnosis. Methods Samples from 77 healthy subjects, 173 anti-HCV positive patients and 3708 hepatitis patients other than HCV positive were tested with the HCV NS3 antigen assay. Some HCV NS3 antigen positive samples were further validated with HCV-RNA, neutralization and immunodot assays. Twenty-five sequential samples from 11 HCV NS3 antigen positive patients were subjected to kinetic study. Results Only 48 （1.3%） of 3708 anti-HCV negative samples were positive for HCV NS3 antigen. Among them, 44 of 3030 samples from patients only infected with HBV were HCV NS3 antigen positive, 4 of the 445 samples from patients infected with other type hepatitis were HCV NS3 antigen positive. In addition, 42 （24.3%） of 173 anti-HCV positive samples were HCV NS3 antigen positive and all 77 samples from healthy subjects were negative to HCV NS3 antigen assay. Of the 15 HCV NS3 antigen positive samples, 9 （60%） were HCV-RNA positive. The neutralization and positive percentage of immunodot assay for 23 HCV NS3 antigen positive sera were 87.0% （20/23） and 69.6% （16/23） respectively. Of the 25 sequential samples from 11 HCV NS3 antigen positive patients, there was a negative correlation between the OD values and the duration of test （r=-0.989, P〈0.05）, and there were correlations among their HCV NS3 antigen, HCV-RNA and anti-HCV Utres. The anti-HCV antibodies of two sera were detected while their OD values of HCV NS3 antigen decreased gradually. Conclusions The HCV NS3 antigen detection assay showed perfect specificity and high sensitivity. Thus, it would be useful and economical as a routine test in laboratories for early diagnosis of HCV infection and prevention.展开更多
对血液筛查的四种丙型肝炎病毒（Hepatitis C virus,HCV）抗体试剂检测方法的性能进行评估。方法采用协作标定方式,应用四种检测方法（间接ELISA法、双抗原夹心ELISA法、间接CLIA法、双抗原夹心CLIA法）16种HCV抗体试剂,对经确证筛选出...对血液筛查的四种丙型肝炎病毒（Hepatitis C virus,HCV）抗体试剂检测方法的性能进行评估。方法采用协作标定方式,应用四种检测方法（间接ELISA法、双抗原夹心ELISA法、间接CLIA法、双抗原夹心CLIA法）16种HCV抗体试剂,对经确证筛选出的70份（HCV抗体阳性35份、阴性35份）血浆样本进行检测,通过分析阳性、阴性符合率,评估四种方法 HCV抗体试剂的性能。结果间接ELISA法试剂检测阳性符合率为88.6%（31/35）~94.3%（33/35）,双抗原夹心ELISA法、间接CLIA法、双抗原夹心CLIA法试剂检测阳性符合率为91.4%（32/35）~94.3%（33/35）,四种检测方法 HCV抗体试剂阳性符合率之间的差异无统计学意义（P〉0.05）;间接ELISA法和间接CLIA法试剂弱阳性样本检出率为11.4%（4/35）~31.4%（11/35）,双抗原夹心ELISA法和双抗原夹心CLIA法试剂弱阳性样本检出率为5.7%（2/35）~11.4%（4/35）,四种检测方法 HCV抗体试剂对弱阳性样本的检出率之间的差异有统计学意义（P〈0.05）;间接ELISA法试剂检测阴性符合率分别为94.3%（33/35）~100%（35/35）,间接CLIA法试剂阴性符合率分别为94.3%（33/35）~97.1%（34/35）,双抗原夹心ELISA法和双抗原夹心CLIA法试剂阴性符合率均为97.1%（34/35）,四种检测方法 HCV抗体试剂阴性符合率之间的差异无统计学意义（P〉0.05）。结论四种检测方法 HCV抗体试剂的性能基本一致,不同方法各有优缺点,建议应用多种检测方法对弱阳性样本进行确认检测。展开更多
丙型病毒性肝炎是由丙型肝炎病毒(hepatitis C virus,HCV)引起的一种传染性疾病.发展对HCV抗原具有高亲和力高特异性的识别分子和检测方法对丙肝进行早期诊断具有非常重要的意义.我们通过SELEX筛选得到了能特异性识别HCV核心蛋白(core蛋...丙型病毒性肝炎是由丙型肝炎病毒(hepatitis C virus,HCV)引起的一种传染性疾病.发展对HCV抗原具有高亲和力高特异性的识别分子和检测方法对丙肝进行早期诊断具有非常重要的意义.我们通过SELEX筛选得到了能特异性识别HCV核心蛋白(core蛋白)的DNA核酸适体,建立了可对HCV core蛋白进行高灵敏检测的核酸适体-酶联免疫新方法,并成功应用于丙肝病人血清中HCV core蛋白的检测,有望发展成为简便、灵敏、低成本的HCV早期诊断和血清筛查新方法.展开更多
基金the Capital Medical Developing Scientific and Research Fund (No. 2002-3068)the Basic and Clinical Joint Project of Capital Medical University (No.02JL20)
文摘Background Hepatitis C virus （HCV） core antigen assays have been produced to exclude infectious donations collected during the preseroconversion window phase （PWP）. For the same purpose, we evaluated the specificity and sensitivity of a novel hepatitis C virus NS3 antigen detection immunoassay and the application of this assay in clinical diagnosis. Methods Samples from 77 healthy subjects, 173 anti-HCV positive patients and 3708 hepatitis patients other than HCV positive were tested with the HCV NS3 antigen assay. Some HCV NS3 antigen positive samples were further validated with HCV-RNA, neutralization and immunodot assays. Twenty-five sequential samples from 11 HCV NS3 antigen positive patients were subjected to kinetic study. Results Only 48 （1.3%） of 3708 anti-HCV negative samples were positive for HCV NS3 antigen. Among them, 44 of 3030 samples from patients only infected with HBV were HCV NS3 antigen positive, 4 of the 445 samples from patients infected with other type hepatitis were HCV NS3 antigen positive. In addition, 42 （24.3%） of 173 anti-HCV positive samples were HCV NS3 antigen positive and all 77 samples from healthy subjects were negative to HCV NS3 antigen assay. Of the 15 HCV NS3 antigen positive samples, 9 （60%） were HCV-RNA positive. The neutralization and positive percentage of immunodot assay for 23 HCV NS3 antigen positive sera were 87.0% （20/23） and 69.6% （16/23） respectively. Of the 25 sequential samples from 11 HCV NS3 antigen positive patients, there was a negative correlation between the OD values and the duration of test （r=-0.989, P〈0.05）, and there were correlations among their HCV NS3 antigen, HCV-RNA and anti-HCV Utres. The anti-HCV antibodies of two sera were detected while their OD values of HCV NS3 antigen decreased gradually. Conclusions The HCV NS3 antigen detection assay showed perfect specificity and high sensitivity. Thus, it would be useful and economical as a routine test in laboratories for early diagnosis of HCV infection and prevention.
文摘丙型病毒性肝炎是由丙型肝炎病毒(hepatitis C virus,HCV)引起的一种传染性疾病.发展对HCV抗原具有高亲和力高特异性的识别分子和检测方法对丙肝进行早期诊断具有非常重要的意义.我们通过SELEX筛选得到了能特异性识别HCV核心蛋白(core蛋白)的DNA核酸适体,建立了可对HCV core蛋白进行高灵敏检测的核酸适体-酶联免疫新方法,并成功应用于丙肝病人血清中HCV core蛋白的检测,有望发展成为简便、灵敏、低成本的HCV早期诊断和血清筛查新方法.
