在双特异抗体中自由光链杂质的表征
Monica Sadek1, Neelima Mantha2, Steffen Lippold1
1Analytical Development, Genentech Inc., South San Francisco, CA, USA.
mAbs
|July 3, 2025
概括
使用蛋白质L染色学净化双特异抗体 (bsAbs) 可以导致自由光链 (LC) 杂质. 这些自由的LC可以在压力下形成寡合体,影响产品的安全性和有效性.
科学领域:
- 生物制药制造业 生物制药制造业
- 蛋白质化学 蛋白质化学
- 分析化学是一种分析化学.
背景情况:
- 双特异性抗体 (bsAbs) 提供了新的治疗机制,但由于结构复杂性和异质性,存在制造挑战.
- 标准的净化方法可能对bsAbs不够,需要独特的策略,可以引入新的杂质.
- 识别和描述新杂质对于确保产品的安全性和有效性至关重要.
研究的目的:
- 为了评估二特异性抗体 (bsAb) 净化中的蛋白质L亲和染色学.
- 为了识别和描述产品相关的杂质,由这种净化方法产生的.
- 作为一种新型杂质,研究自由轻链 (LC) 寡合物的形成和行为.
主要方法:
- 蛋白质L亲和染色法用于bsAb净化.
- 使用加速压力条件来诱导杂质的形成.
- 一套分析技术包括染色学,电泳和质谱学被用于表征.
- 对安全性,免疫性,药理动力学和生物活性进行了影响评估.
主要成果:
- 蛋白质L染色学导致最终bsAb产品中高水平的自由光链 (LC).
- 观察到,在加速应力下,自由LC以度,时间和温度依赖的方式形成寡合体.
- 这项研究首次报告了自由LC寡合体作为一种与产品相关的新杂质.
- 综合性表征为这些杂质的形成和行为提供了洞察力.
结论:
- 对于bsAb净化的蛋白质L亲和色谱可以导致生成自由LC及其随后的寡合化.
- 自由LC寡合体代表了bsAb制造中的新类产品相关杂质.
- 彻底的表征和影响评估对于理解和减轻与这些新杂质相关的风险至关重要.
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