申请人:ImmunoGen, Inc.
公开号:US10913795B2
公开(公告)日:2021-02-09
Compositions and methods for minimizing antibody disulfide bond reduction are described. In one aspect, a composition is provided for culturing mammalian host cells to express an antibody including an anti-reduction agent that minimizes reduction of a disulfide bond in the antibody or fragment thereof. In some other aspects, methods for minimizing disulfide bond reduction; increasing production of an antibody or fragment thereof with intact native disulfide bonds; increasing a ratio of non-reduced to reduced antibody or fragment thereof; producing a therapeutic antibody or fragment thereof by adding a sufficient amount of an anti-reduction agent to a cell culture media, pre-harvest cell culture fluid, or harvest cell culture fluid are described. In another aspect, minimizing disulfide bond reduction in an antibody or fragment thereof culturing the host cell in a concentration of at least about 20% O2 is described.
本文描述了使抗体二硫键还原最小化的组合物和方法。在一个方面,提供了一种用于培养哺乳动物宿主细胞以表达抗体的组合物,该组合物包括一种抗还原剂,可最大程度地减少抗体或其片段中二硫键的还原。在其他一些方面,描述了使二硫键还原最小化的方法;提高具有完整原生二硫键的抗体或其片段的产量;提高非还原抗体或其片段与还原抗体或其片段的比例;通过向细胞培养基、收获前细胞培养液或收获细胞培养液中添加足量的抗还原剂来生产治疗性抗体或其片段。在另一个方面,描述了在至少约 20% 的氧气浓度下培养宿主细胞可最大程度地减少抗体或其片段中的二硫键还原。