开发一种10g/L的工艺,用于一种难以表达的多种类型抗体格式,使用整体工艺开发方法
Mégane Peltret1, Patrick Vetsch1, Elodie Farvaque1
1Drug Substance Development, Ichnos Sciences, Switzerland.
Journal of biotechnology
|April 30, 2024
概括
研究人员优化了基于T细胞受体 (BEAT) 抗体的抗体对复杂双特异性参与的表达. 涉及分子生物学,细胞系发展和上游过程优化的整体方法显著增加了蛋白质标位.
科学领域:
- 生物技术是生物技术.
- 蛋白质工程是指蛋白质工程.
- 生物制药制造业 生物制药制造业
背景情况:
- 多特异性抗体格式,如基于T细胞受体 (BEAT) 抗体的抗体的双特异性参与,与传统单克隆抗体 (mAbs) 相比,存在表达挑战.
- 这些工程蛋白质的固有复杂性会导致表达度低,阻碍它们的治疗开发和制造.
研究的目的:
- 解决和克服与难以表达的双特异性双巴拉托普性BEAT抗体相关的表达限制.
- 开发一个强大的和可扩展的平台过程,以提高复杂的多特异性抗体的生产.
主要方法:
- 作为表达不良的根本原因,研究了子单元失衡.
- 优化信号和在单个基因矢量上使用双向量设计元素.
- 增强细胞群体选择,实施上游 (USP) 平台过程,并利用细胞培养温度变化.
- 开发了一种高密度播种工艺,用于强化细胞培养.
主要成果:
- 通过初始优化,对于难以表达的BEAT抗体,通过初始优化实现了高达6g/L的标位水平.
- 通过实施高密度播种过程,将BEAT抗体的标位提高到大约11g/L,这代表了十倍的改善.
- 成功地将开发的平台应用于三特异性抗体,达到10 g/L的标位水平.
结论:
- 综合分子生物学,细胞系发展,上游过程优化和过程强化,全面的平台过程有效地增强了具有挑战性的多特异性抗体的表达.
- 开发的策略为生产复杂抗体格式提供了可扩展的解决方案,为它们更广泛的治疗应用铺平了道路.
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