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    • 4. 发明申请
    • ANTIBODY FUSION PROTEINS WITH MODIFIED FCRN BINDING SITES
    • 具有修饰的FCRN结合位点的抗体融合蛋白
    • WO2010121766A1
    • 2010-10-28
    • PCT/EP2010/002377
    • 2010-04-19
    • MERCK PATENT GMBHLO, Kin-MingSTEIN, Pascal André
    • LO, Kin-MingSTEIN, Pascal André
    • C07K16/00
    • C07K14/565C07K16/00C07K2317/52C07K2317/53C07K2319/02C07K2319/30
    • Disclosed are antibody fusion proteins with a modified FcRn binding site and nucleic acid molecules encoding them. The antibody fusion protein include two polypeptide chains, wherein the first polypeptide chain includes a biologically, preferably therapeutically active molecule linked to at least a portion of an immunoglobulin constant region. The second polypeptide chain includes at least a portion of an immunoglobulin constant region. One of the polypeptide chains includes a mutation in the constant region that results in reduction or loss of FcRn binding but does not cause substantial reduction of serum half-life of said antibody fusion protein. In a preferred embodiment the invention relates to respectively constructed Fc-IFNβ molecules. Also disclosed are methods of producing the fusion proteins and methods of using the fusion proteins for treating diseases and conditions alleviated by the administration of the fusion proteins.
    • 公开了具有修饰的FcRn结合位点和编码它们的核酸分子的抗体融合蛋白。 抗体融合蛋白包括两条多肽链,其中第一多肽链包括连接至免疫球蛋白恒定区的至少一部分的生物学优选的治疗活性分子。 第二多肽链包括免疫球蛋白恒定区的至少一部分。 多肽链中的一个包括导致FcRn结合的减少或丧失的恒定区中的突变,但不会导致所述抗体融合蛋白的血清半衰期的显着降低。 在优选的实施方案中,本发明涉及分别构建的Fc-IFNβ分子。 还公开了产生融合蛋白的方法和使用融合蛋白治疗通过施用融合蛋白而减轻的疾病和病症的方法。