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    • 13. 发明授权
    • Production of attenuated respiratory syncytial virus vaccines involving modification of M2 ORF2
    • 涉及M2 ORF2修饰的减毒呼吸道合胞病毒疫苗的生产
    • US06713066B1
    • 2004-03-30
    • US09611829
    • 2000-07-07
    • Peter L. CollinsBrian R. MurphyAlison Bermingham
    • Peter L. CollinsBrian R. MurphyAlison Bermingham
    • A61K3912
    • C07K14/005A61K39/00A61K2039/5254C12N7/00C12N2760/18522C12N2760/18543C12N2760/18561
    • Recombinant respiratory syncytial virus (RSV) are provided in which expression of the second translational open reading frame encoded by the M2 gene (M2ORF2) is reduced or ablated to yield novel RSV vaccine candidates. Expression of M2 ORF2 is reduced or ablated by modifying a recombinant RSV genome or antigenome to incorporate a frame shift mutation, or one or more stop codons in M2 ORF2. Alternatively, M2 ORF2 is deleted in whole or in part to render the M2-2 protein partially or entirely non-functional or to disrupt its expression altogether. M2 ORF2 deletion and knock out mutants possess highly desirable phenotypic characteristics for vaccine development. These changes specify one or more desired phenotypic changes in the resulting virus or subviral particle. Vaccine candidates are generated that show a change in mRNA transcription, genomic or antigenomic RNA replication, viral growth characteristics, viral antigen expression, viral plaque size, and/or a change in cytopathogenicity. In addition, M2-2 knock out or deletion virus exhibits increased levels of synthesis of viral proteins in cell culture, providing an enriched source of viral antigen or protein for purification and use as a noninfectious subunit vaccine.
    • 提供了重组呼吸道合胞病毒(RSV),其中由M2基因(M2ORF2)编码的第二翻译开放阅读框的表达被减少或消融以产生新的RSV疫苗候选物。 M2 ORF2的表达通过修饰重组RSV基因组或抗原组合来结合帧移位突变或M2 ORF2中的一个或多个终止密码子来减少或消除。 或者,M2 ORF2全部或部分缺失,以使M2-2蛋白部分或完全不起作用或完全破坏其表达。 M2 ORF2缺失和敲除突变体对于疫苗开发具有非常需要的表型特征。 这些变化指定所得病毒或亚病毒颗粒中的一种或多种期望的表型变化。 产生疫苗候选物,其显示mRNA转录,基因组或反基因组RNA复制,病毒生长特征,病毒抗原表达,病毒斑块大小和/或细胞致病性变化的变化。 此外,M2-2敲除或缺失病毒在细胞培养物中表现出增加的病毒蛋白质合成水平,提供用于纯化和用作非感染性亚单位疫苗的病毒抗原或蛋白质的丰富来源。
    • 16. 发明授权
    • Attenuated chimeric respiratory syncytial virus
    • 减毒嵌合呼吸道合胞病毒
    • US07846455B2
    • 2010-12-07
    • US10722000
    • 2003-11-25
    • Peter L. CollinsBrian R. MurphyStephen S. Whitehead
    • Peter L. CollinsBrian R. MurphyStephen S. Whitehead
    • A61K39/155A61K39/12C12N7/00C12N7/01C12N7/04
    • C07K14/005A61K39/00A61K2039/5254C12N7/00C12N2760/18522C12N2760/18543C12N2760/18561
    • Chimeric respiratory syncytial virus (RSV) and vaccine compositions thereof are produced by introducing one or more heterologous gene(s) or gene segment(s) from one RSV subgroup or strain into a recipient RSV backround of a different subgroup or strain. The resulting chimeric RSV virus or subviral particle is infectious and attenuated, preferably by introduction of selected mutations specifying attenuated phenotypes into a chimeric genome or antigenome to yield, for example, temperature sensitive (ts) and/or cold adapted (ca) vaccine strains. Alternatively, chimeric RSV and vaccine compositions thereof incorporate other mutations specifying desired structural and/or phenotypic characteristics in an infectious chimeric RSV. Such chimeric RSV incorporate desired mutations specified by insertion, deletion, substitution or rearrangement of one or more selected nucleotide sequence(s), gene(s), or gene segment(s) in a chimeric RSV clone. This provides a method for development of novel vaccines against diverse RSV strains by using a common attenuated backbone as a vector to express protective antigens of heterologous strains. The immune system of an individual is stimulated to induce protection against natural RSV infection, preferably in a multivalent manner to achieve protection against multiple RSV strains and/or subgroups.
    • 嵌合呼吸道合胞病毒(RSV)及其疫苗组合物通过将一个或多个异源基因或基因区段从一个RSV亚组或菌株引入不同亚组或菌株的受体RSV背景中而产生。 所得到的嵌合RSV病毒或亚病毒颗粒是感染性和减毒性的,优选通过将指定减毒表型的选定突变引入到嵌合基因组或反基因组中以产生例如温度敏感(ts)和/或冷适应(ca)疫苗株。 或者,嵌合RSV及其疫苗组合物掺入在感染性嵌合RSV中指定所需结构和/或表型特征的其它突变。 这种嵌合RSV包含通过嵌合RSV克隆中的一个或多个选定的核苷酸序列,基因或基因片段的插入,缺失,取代或重排而指定的所需突变。 这提供了通过使用共同的减毒骨架作为表达异源株的保护性抗原的载体来开发针对不同RSV菌株的新型疫苗的方法。 刺激个体的免疫系统以诱导针对天然RSV感染的保护,优选以多价方式实现针对多个RSV菌株和/或亚组的保护。