Anti-TFPI Antibody Variants with Differential Binding Across pH Range For Improved Pharmacokinetics
    4.
    发明申请
    Anti-TFPI Antibody Variants with Differential Binding Across pH Range For Improved Pharmacokinetics 审中-公开
    抗TFPI抗体变体与pH范围的差异结合,用于改善药代动力学

    公开(公告)号:US20160009818A1

    公开(公告)日:2016-01-14

    申请号:US14772336

    申请日:2014-03-14

    Abstract: Antibodies are disclosed that bind to and inhibit the anti-coagulant function of TFPI and have a lower affinity for TFPI at pH 6.0 than at pH 7.4. The lower affinity at pH 6 improves circulating half-life (T½) due to reduced target mediated clearance, a process by which an antibody/antigen complex is endocytosed and trafficked to the lysosome where both components are degraded. The lower affinity at pH 6.0 results in disruption of the complex prior to lysosome targeting and allows for re-circulation of the antibody. Specific modifications to antibody binding by histidine residue substitution are disclosed along with methods of use.

    Abstract translation: 公开了结合并抑制TFPI的抗凝血功能的抗体,并且在PH6.0下对TFPI的亲和力低于在pH7.4。 由于靶介导的清除率降低,pH6下的较低亲和力改善了循环半衰期(T 1/2),这是抗体/抗原复合物被内吞并被运送到两个成分都被降解的溶酶体的过程。 在pH6.0下的较低亲和力导致在溶酶体靶向之前复合物的破坏并允许抗体的再循环。 公开了通过组氨酸残基取代对抗体结合的具体修饰以及使用方法。

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