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    • 9. 发明公开
    • ENGINEERING FC ANTIBODY REGIONS TO CONFER EFFECTOR FUNCTION
    • ERZEUGUNG VON FC-ANTIKÖRPERREGIONENFÜREFFEKTORFUNKTION
    • EP1810035A4
    • 2010-03-17
    • EP05857976
    • 2005-11-10
    • MACROGENICS INC
    • STAVENHAGEN JEFFREYKOENIG SCOTT
    • G01N33/574C07K16/08C07K16/30
    • C07K16/30C07K16/00C07K16/283C07K16/2887C07K16/2896C07K16/32C07K2317/41C07K2317/52C07K2317/72C07K2317/732C07K2317/734C07K2319/30G01N33/574
    • The present invention relates to molecules having a variant Fc region, wherein said variant Fc region comprises at least one amino acid modification relative to a wild-type Fc region. These modified molecules confer an effector function to a molecule, where the parent molecule does not detectably exhibit this effector function. In particular, the molecules of the invention have an increased effector cell function mediated by a FcgammaR, such as, but not limited to, ADCC. In one embodiment, the variant Fc region binds FcgammaRIIIA and/or FcgammaRIIA with a greater affinity, relative to a comparable molecule comprising the wild-type Fc region. The molecules of the invention have particular utility in treatment, prevention or management of a disease or disorder, such as cancer, in a sub-population of patients, wherein the target antigen is expressed at low levels in the target cell population, in particular, in patients refractory to treatment with an existing therapeutic antibody due to the low level of target antigen expression on the cancer or associated cells.
    • 本发明涉及具有变体Fc区的分子,其中所述变体Fc区包含相对于野生型Fc区的至少一个氨基酸修饰。 这些修饰的分子赋予分子的效应子功能,其中母体分子不可检测地表现出该效应子功能。 特别地,本发明的分子具有由FcγR介导的增强的效应细胞功能,例如但不限于ADCC。 在一个实施方案中,相对于包含野生型Fc区的可比分子,变体Fc区以更高的亲和力结合FcγRIIIA和/或FcγRIIA。 本发明的分子在患者的亚群中治疗,预防或治疗疾病或病症(例如癌症)具有特别的用途,其中目标抗原在靶细胞群体中以低水平表达,特别是, 在由于癌细胞或相关细胞上靶抗原表达水平低的现有治疗性抗体治疗难治的患者中。
    • 10. 发明申请
    • IDENTIFICATION AND ENGINEERING OF ANTIBODIES WITH VARIANT HEAVY CHAINS AND METHODS OF USING SAME
    • 具有不同重要链条的抗体的鉴定和工程及其使用方法
    • WO2007106707A8
    • 2009-07-23
    • PCT/US2007063548
    • 2007-03-08
    • MACROGENICS INCSTAVENHAGEN JEFFREY
    • STAVENHAGEN JEFFREY
    • G01N33/53C07H21/04C07K16/44C12N5/06
    • C07K16/44C07K16/283C07K16/2887C07K16/32C07K2317/24C07K2317/72C07K2317/732C07K2317/734Y02A90/26
    • The present invention relates to molecules, particularly polypeptides, more particularly immunoglobulins (e.g., antibodies), comprising a variant heavy chain, which variant heavy chain comprises constant domains from more than one IgG isotype. The variant heavy chain of the invention may further comprise at least one amino acid modification relative to the parental heavy chain, such that the Fc region of said variant heavy chain binds an Fc?R with an altered affinity relative to a comparable molecule comprising the wild-type heavy cahin. The molecules of the invention are particularly useful in preventing, treating, or ameliorating one or more symptoms associated with a disease, disorder, or infection. The molecules of the invention are particularly useful for the treatment or prevention of a disease or disorder where an enhanced efficacy of effector cell function (e.g., ADCC) mediated by Fc?R is desired, e.g., cancer, infectious disease, and in enhancing the therapeutic efficacy of therapeutic antibodies the effect of which is mediated by ADCC.
    • 本发明涉及包括变体重链的分子,特别是多肽,更特别是包含变体重链的免疫球蛋白(例如抗体),该变体重链包含来自多于一种IgG同种型的恒定结构域。 本发明的变体重链可以进一步包含相对于亲本重链的至少一个氨基酸修饰,使得所述变体重链的Fc区相对于包含野生型的可比较分子具有改变的亲和力结合FcγR 型重胡萝卜素。 本发明的分子特别可用于预防,治疗或改善与疾病,病症或感染相关的一种或多种症状。 本发明的分子特别可用于治疗或预防期望由FcγR介导的效应细胞功能增强的功效(例如ADCC)的疾病或病症,例如癌症,感染性疾病,以及在增强 治疗性抗体的治疗功效,其作用由ADCC介导。