Transgenic animals for producing specific isotypes of human antibodies via non-cognate switch regions
    18.
    发明授权
    Transgenic animals for producing specific isotypes of human antibodies via non-cognate switch regions 有权
    用于通过非同源转换区产生人抗体特异性同种型的转基因动物

    公开(公告)号:US06833268B1

    公开(公告)日:2004-12-21

    申请号:US09329582

    申请日:1999-06-10

    IPC分类号: C12N1563

    摘要: The present invention provides fully human antibodies in a transgenic animal of a desired isotype in response to immunization with any virtually any desired antigen. The human immunoglobulin heavy chain transgene in the foregoing animals comprises a human constant region gene segment comprising exons encoding the desired heavy chain isotype, operably linked to switch segments from a constant region of a different heavy chain isotype, i.e., a non-cognate switch region. Said additional constant region segment comprises a switch region and human constant region coding segment, wherein the constant region coding segment is operably linked to a switch region that it is not normally associated with, i.e., a non-cognate switch region. In the transgenes of the invention, the non-cognate switch region may be a switch region from a different species than the constant region coding segment. The switch region and membrane exons of the invention may comprise a human gamma-2 constant region and the secreted constant region exons are from a human gamma-1 or a human gamma-4 constant region.

    摘要翻译: 本发明在任何实际上任何所需抗原的免疫响应中,在所需同种型的转基因动物中提供完全人抗体。 前述动物中的人免疫球蛋白重链转基因包含人恒定区基因片段,其包含编码所需重链同种型的外显子,其可操作地连接于不同重链同种型的恒定区切换片段,即非同源转换区 。 所述附加恒定区段包括开关区域和人类恒定区域编码区段,其中恒定区域编码段可操作地连接到其通常不与非同源开关区域相关联的开关区域。 在本发明的转基因中,非同源开关区可以是来自与恒定区编码区不同的种的开关区。 本发明的切换区和膜外显子可以包含人γ-2恒定区,分泌的恒定区外显子来自人γ-1或人γ-4恒定区。