AIM: To develop a Fok-I nested polymerase chain reaction(PCR)-restriction fragment length polymorphism analysis(PRA) method for the detection of hepatitis B virus X region(HBx) V5 M mutation.METHODS: Nested PCR was ap...AIM: To develop a Fok-I nested polymerase chain reaction(PCR)-restriction fragment length polymorphism analysis(PRA) method for the detection of hepatitis B virus X region(HBx) V5 M mutation.METHODS: Nested PCR was applied into DNAs from 198 chronic patients at 2 different stages [121 patients with hepatocellular carcinoma(HCC) and 77 carrier patients]. To identify V5 M mutants, digestion of nested PCR amplicons by the restriction enzyme Fok-I(GGA TGN9↓) was done. For size comparison, the enzymetreated products were analyzed by electrophoresis on 2.5% agarose gels, stained with ethidium bromide, and visualized on a UV transilluminator.RESULTS: The assay enabled the identification of 69 patients(sensitivity of 34.8%; 46 HCC patients and 23 carrier patients). Our data also showed that V5 M prevalence in HCC patients was significantly higher than in carrier patients(47.8%, 22/46 patients vs 0%, 0/23 patients, P < 0.001), suggesting that HBx Ag V5 M mutation may play a pivotal role in HCC generation in chronic patients with genotype C infections.CONCLUSION: The Fok-I nested PRA developed in this study is a reliable and cost-effective method to detect HBx Ag V5 M mutation in chronic patients with genotype C2 infection.展开更多
目的为中国急性乙型病毒性肝炎(乙肝)监测,筛选合适的抗乙肝病毒核心抗原抗体免疫球蛋白M(Immunoglobulin M Antibody to Hepatitis B Virus Core Antigen,Anti-HBc-IgM)检测试剂。方法选择市场销量较大的三种酶联免疫吸附试验Anti-HBc-...目的为中国急性乙型病毒性肝炎(乙肝)监测,筛选合适的抗乙肝病毒核心抗原抗体免疫球蛋白M(Immunoglobulin M Antibody to Hepatitis B Virus Core Antigen,Anti-HBc-IgM)检测试剂。方法选择市场销量较大的三种酶联免疫吸附试验Anti-HBc-IgM检测试剂,平行检测参比系统各3次,比较各试剂的组内相关系数(Intraclass Correlation Coefficient,ICC)、变异系数,以评价试剂的可靠性,绘制受试者工作特征曲线(Receiver Operating Characteristic,ROC),计算ROC下面积(Area Under Curve,AUC)、部分(Partial)AUC(pAUC)、固定特异度下灵敏度[Sensitivity at a Fix Specificity,Se(FPR=e)],以评价试剂的真实性。结果三种试剂的ICC均接近于1,一致性均好,两两比较中A试剂稳定性最好,变异性最小(Bootstrap法,P<0.05)。B试剂ROC位于最上方,AUC中位数最大,和A、C比较均有统计学意义(Bootstrap法,P<0.05);B和C、A试剂的pAUC中位数和Se(FPR=0.05)中位数差异无统计学意义。结论符合国家标准的三种试剂,以雅培试剂作为参照相比,综合评价结果,B试剂较好。展开更多
基金Supported by a National Research Foundation(NRF)of Korea grant funded by the Korean government(Ministry of EducationScience+2 种基金and TechnologyMEST)Grant No.2013-005810
文摘AIM: To develop a Fok-I nested polymerase chain reaction(PCR)-restriction fragment length polymorphism analysis(PRA) method for the detection of hepatitis B virus X region(HBx) V5 M mutation.METHODS: Nested PCR was applied into DNAs from 198 chronic patients at 2 different stages [121 patients with hepatocellular carcinoma(HCC) and 77 carrier patients]. To identify V5 M mutants, digestion of nested PCR amplicons by the restriction enzyme Fok-I(GGA TGN9↓) was done. For size comparison, the enzymetreated products were analyzed by electrophoresis on 2.5% agarose gels, stained with ethidium bromide, and visualized on a UV transilluminator.RESULTS: The assay enabled the identification of 69 patients(sensitivity of 34.8%; 46 HCC patients and 23 carrier patients). Our data also showed that V5 M prevalence in HCC patients was significantly higher than in carrier patients(47.8%, 22/46 patients vs 0%, 0/23 patients, P < 0.001), suggesting that HBx Ag V5 M mutation may play a pivotal role in HCC generation in chronic patients with genotype C infections.CONCLUSION: The Fok-I nested PRA developed in this study is a reliable and cost-effective method to detect HBx Ag V5 M mutation in chronic patients with genotype C2 infection.
文摘目的为中国急性乙型病毒性肝炎(乙肝)监测,筛选合适的抗乙肝病毒核心抗原抗体免疫球蛋白M(Immunoglobulin M Antibody to Hepatitis B Virus Core Antigen,Anti-HBc-IgM)检测试剂。方法选择市场销量较大的三种酶联免疫吸附试验Anti-HBc-IgM检测试剂,平行检测参比系统各3次,比较各试剂的组内相关系数(Intraclass Correlation Coefficient,ICC)、变异系数,以评价试剂的可靠性,绘制受试者工作特征曲线(Receiver Operating Characteristic,ROC),计算ROC下面积(Area Under Curve,AUC)、部分(Partial)AUC(pAUC)、固定特异度下灵敏度[Sensitivity at a Fix Specificity,Se(FPR=e)],以评价试剂的真实性。结果三种试剂的ICC均接近于1,一致性均好,两两比较中A试剂稳定性最好,变异性最小(Bootstrap法,P<0.05)。B试剂ROC位于最上方,AUC中位数最大,和A、C比较均有统计学意义(Bootstrap法,P<0.05);B和C、A试剂的pAUC中位数和Se(FPR=0.05)中位数差异无统计学意义。结论符合国家标准的三种试剂,以雅培试剂作为参照相比,综合评价结果,B试剂较好。
