IMMUNOGLOBULIN FC VARIANTS
    4.
    发明申请

    公开(公告)号:US20140357843A1

    公开(公告)日:2014-12-04

    申请号:US14369616

    申请日:2012-12-28

    IPC分类号: A61K47/48 A61K38/26 C07K16/28

    摘要: The present invention relates to immunoglobulin Fc variants having an increased binding affinity for FcRn, which is characterized by including one or more amino acid modifications selected from the group consisting of 307S, 308F, 380S, 380A, 428L, 429K, 430S, 433K and 434S (this numbering is according to the EU index) in the constant region of a native immunoglobulin Fc fragment. Owing to the high binding affinity for FcRn, the immunoglobulin Fc variants according to the present invention show more prolonged in vivo half-life, and thus can be used for the preparation of a long-acting formulation of protein drugs.

    摘要翻译: 本发明涉及对FcRn具有增加的结合亲和力的免疫球蛋白Fc变体,其特征在于包括一个或多个选自307S,308F,380S,380A,428L,429K,430S,433K和434S的氨基酸修饰 (该编号根据EU指数)在天然免疫球蛋白Fc片段的恒定区中。 由于对FcRn的高结合亲和力,根据本发明的免疫球蛋白Fc变体显示更长的体内半衰期,因此可用于制备蛋白质药物的长效制剂。