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    • 3. 发明授权
    • Bioassay for influenza A and B nucleoprotein
    • A型和B型甲基蛋白的生物测定
    • US5316910A
    • 1994-05-31
    • US15739
    • 1993-02-10
    • Paul A. RotaRenee A. Black
    • Paul A. RotaRenee A. Black
    • A61K38/00A61K39/00C07K14/11C07K16/10C12N15/866C12Q1/00
    • C12N15/86C07K14/005C07K16/1018A61K38/00A61K39/00C12N2710/14143C12N2740/16134C12N2740/16234C12N2760/16122
    • The present invention relates to nucleoprotein (NP) genes of the influenza A and B viruses which were constructed from virion RNA and subsequently expressed in Spodoptera frugiperda (S19) cells using the baculovirus vector, Autographa californica nuclear polyhedrosis virus (AcNPV). Western blot analysis of lysates prepared from S19 cells infected with the recombinant viruses confirmed that the baculovirus-expressed NP antigens were reactive with monoclonal antibodies specific for either type A or B NP and with anti-NP antibodies in human serum samples. Electrophoretic analysis indicated that the expressed influenza NP antigens comigrated with NP purified from influenza A or B virions and that the recombinant NP antigens represented greater than 10% of total protein in infected cells. Dilutions of clarified S19 cell lysates were used as antigens in a standard enzyme immunoassay format to detect serum antibody specific for influenza A or B viruses. The results from assays using the baculovirus-expressed NP antigens showed good correlation with the results obtained using bacterially-expressed NP antigen as well as complement fixation. Therefore, baculovirus-expressed NP antigens can be used in reproducible and routine assays for the serodiagnosis of influenza virus infections as an alternative to the more burdensome complement fixation or hemagglutination tests.
    • 本发明涉及由病毒粒子RNA构建并随后使用杆状病毒载体(Autographa californica nuclear polyhedrosis virus,AcNPV)在草地贪夜蛾(S-19)细胞中表达的甲型和乙型流感病毒的核蛋白(NP)基因。 用重组病毒感染的S19细胞制备的裂解物的Western印迹分析证实,杆状病毒表达的NP抗原与人血清样品中针对A型或B型NP特异性抗体和抗NP抗体的单克隆抗体反应。 电泳分析表明,表达的流感NP抗原与从A型或B型病毒粒子中纯化的NP一起游离,并且重组NP抗原在感染细胞中占总蛋白的10%以上。 将澄清的S19细胞裂解物的稀释液用作标准酶免疫测定法的抗原,以检测甲型或乙型流感病毒特异性的血清抗体。 使用杆状病毒表达的NP抗原的测定结果与使用细菌表达的NP抗原以及补体固定获得的结果具有良好的相关性。 因此,杆状病毒表达的NP抗原可用于可重复和常规检测流感病毒感染的血清学诊断,作为更繁重的补体固定或血细胞凝集试验的替代方法。