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对原始临床样本中流感(H3N2)病毒的血凝素(HA)基因进行直接测序,结果显示其与在哺乳动物细胞中培养的病毒具有序列同一性。

Direct sequencing of the HA gene of influenza (H3N2) virus in original clinical samples reveals sequence identity with mammalian cell-grown virus.

作者信息

Katz J M, Wang M, Webster R G

机构信息

Department of Virology and Molecular Biology, St. Jude Children's Research Hospital, Memphis, Tennessee 38101.

出版信息

J Virol. 1990 Apr;64(4):1808-11. doi: 10.1128/JVI.64.4.1808-1811.1990.

Abstract

When influenza (H3N2) viruses from infected individuals are grown in embryonated chicken eggs, viruses are isolated which differ antigenically and structurally from viruses grown in mammalian Madin-Darby canine kidney (MDCK) cell culture [G.C. Schild, J.S. Oxford, J.C. de Jong, and R.G. Webster, Nature (London) 303:706-709, 1983]. To determine which of these viruses is most representative of virus replicating in the infected individual, a region of the HA gene of virus present in original clinical samples was amplified by using the polymerase chain reaction and sequenced directly. Comparison of 170 amino acid residues of HA1 flanking and containing the receptor-binding site and antigenic sites indicated that over this region, the HA of virus replicating in the infected individual was identical to that of virus after growth in MDCK cells and was distinct from the HA of viruses grown in eggs. Therefore, cultivation of human influenza H3N2 virus in mammalian MDCK cells results in a virus similar to the predominant population of virus found in the infected individual.

摘要

当从受感染个体分离出的甲型流感病毒(H3N2)株在鸡胚中培养时,所分离出的病毒在抗原性和结构上与在哺乳动物来源的犬肾传代细胞(MDCK)中培养的病毒不同[G.C. 希尔德、J.S. 牛津、J.C. 德容和R.G. 韦伯斯特,《自然》(伦敦)303:706 - 709,1983]。为了确定这些病毒中哪一种最能代表在受感染个体中复制的病毒,利用聚合酶链反应对原始临床样本中病毒的血凝素(HA)基因区域进行扩增并直接测序。对HA1中位于受体结合位点和抗原位点两侧并包含这些位点的170个氨基酸残基进行比较,结果表明,在该区域,在受感染个体中复制的病毒的HA与在MDCK细胞中培养后的病毒的HA相同,与在鸡胚中培养的病毒的HA不同。因此,人甲型流感H3N2病毒在哺乳动物MDCK细胞中培养会产生一种与在受感染个体中发现的主要病毒群体相似的病毒。

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本文引用的文献

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Host cell-mediated variation in H3N2 influenza viruses.宿主细胞介导的H3N2流感病毒变异
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