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    • 2. 发明公开
    • Coagulation factor VIII with reduced immunogenicity.
    • Gerinnungsfaktor VII mit reduzierter Immunogenittt
    • EP2666782A1
    • 2013-11-27
    • EP12168800.6
    • 2012-05-22
    • IMNATE SARL
    • Saint-Remy, Jean-Marie
    • C07K14/435
    • C07K14/755A23V2200/218A61K38/37A61M2202/0452Y10S514/834
    • The invention describes factor VIII molecules with reduced capacity to elicit activation of NKT cells, for use in the treatment of congenital and/or acquired haemophilia A and in bleeding disorders. Said factor VIII molecules having a domain structure Al-al-A2-a2-B-a3-A3-Cl-C2, in which A1, A2, B, A3, C1 and C2 represent domains and al, a2 and a3 acidic regions linking said domains, The factor VIII molecule is obtainable by:
      a. identification of at least one NKT cell epitope wherein said epitope comprises hydrophobic aminoacid residues in position P1 and/or P7
      b. modification of said epitope(s) by eliminating at least one hydrophobic aminoacid residue in position P1 and/or P7, substituting at least one hydrophobic aminoacid residue in position P1 and/or P7 with a non-hydrophobic residue, or adding a non-hydrophobic residue in position P1 and/or P7.
    • 本发明描述了具有降低NKT细胞激活能力的因子VIII分子,用于治疗先天性和/或获得性血友病A和出血性疾病。 所述具有域结构Al-al-A2-a2-B-a3-A3-C1-C2的所述因子VIII分子,其中A1,A2,B,A3,C1和C2表示结构域和a1,a2和a3酸性区连接 所述结构域,因子VIII分子可通过以下方式获得:a。 识别至少一个NKT细胞表位,其中所述表位包含位置P1和/或P7 b的疏水性氨基酸残基。 通过除去位置P1和/或P7中的至少一个疏水性氨基酸残基,用非疏水性残基取代位置P1和/或P7处的至少一个疏水性氨基酸残基,或加入非疏水性,修饰所述表位 位置P1和/或P7处的残基。