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    • 42. 发明公开
    • ANTI-PCSK9 ANTIBODIES WITH PH-DEPENDENT BINDING CHARACTERISTICS
    • 抗-STATK9-ANTIKÖRPERMIT PH-ABHÄNGIGENBINDUNGSEIGENSCHAFTEN
    • EP2882778A1
    • 2015-06-17
    • EP13751027.7
    • 2013-08-12
    • Regeneron Pharmaceuticals, Inc.
    • YANCOPOULOS, George, D.PAPADOPOULOS, Nicholas, J.MURPHY,Andrew, J.STAHL, Neil
    • C07K16/40A61K39/395A61P3/06
    • C07K16/40A61K2039/505C07K2317/21C07K2317/565C07K2317/76C07K2317/92C07K2317/94
    • The present invention provides antibodies and antigen-binding fragments thereof that specifically bind proprotein convertase subtilisin/kexin-9 (PCSK9) with greater affinity at neutral pH than at acidic pH. The antibodies of the invention may possess one or more amino acid changes as compared to antibodies that do not exhibit pH-dependent binding properties. For example, the present invention includes anti-PCSK9 antibodies which possess one or more histidine substitutions in one or more complementarity determining regions. The antibodies of the invention, with pH-dependent binding properties, remain in circulation and exhibit cholesterol lowering activity for prolonged periods of time in animal subjects as compared to anti-PCSK9 antibodies that do not exhibit pH-dependent binding properties. The antibodies of the invention are therefore useful for treating diseases and disorders related to elevated HDL cholesterol, wherein the antibodies of the invention can be administered to a patient at a lower dose and/or with less frequent dosing as compared to antibodies that do not exhibit pH-dependent binding properties.
    • 本发明提供抗体及其抗原结合片段,其在中性pH下比在酸性pH下具有更高的亲和力特异性结合前蛋白转化酶枯草杆菌蛋白酶/ kexin-9(PCSK9)。 与不显示pH依赖性结合特性的抗体相比,本发明的抗体可具有一个或多个氨基酸变化。 例如,本发明包括在一个或多个互补决定区具有一个或多个组氨酸取代的抗PCSK9抗体。 与不具有pH依赖性结合特性的抗PCSK9抗体相比,具有pH依赖性结合特性的本发明抗体在动物受试者中保持循环并延长长时间的胆固醇降低活性。 因此,本发明的抗体可用于治疗与升高的HDL胆固醇相关的疾病和病症,其中与不显示的抗体相比,本发明的抗体可以较低剂量和/或以较不频繁的给药方式施用于患者 pH依赖性结合性质。