图像化毛细管异电聚焦方法开发用于高DARADC的电荷变体
Chuan Leng1, Shuwen Sun1, Wei Lin1
1Merck & Co., Inc., 126 East Lincoln Avenue, Rahway, NJ, 07065, United States.
Analytica chimica acta
|September 12, 2024
概括
开发强大的成像毛细管异电聚焦 (icIEF) 方法,用于高药对抗体比率 (DAR) 抗体-药物联合体 (ADC) 是至关重要的. 本研究提供了一个系统的策略,用于优化icIEF,以准确评估复杂的ADC中的电荷变量.
科学领域:
- 生物化学 生化学
- 分析化学 分析化学
- 制药科学 制药科学
背景情况:
- 电荷异质性是治疗生物制剂的关键质量属性,例如抗体-药物合物 (ADC).
- 开发强大的分析方法,如离子交换色谱 (IEX) 或成像毛细管异电聚焦 (icIEF),对于高药对抗体比率 (DAR) 的ADC是具有挑战性的,因为增加了疏水性,DAR异质性和有效载荷链接器不稳定性.
- 低于最佳的方法可能无法区分电荷和尺寸变异,影响稳定性指示能力.
研究的目的:
- 开发和优化 icIEF 方法,以在高 DAR ADC 中准确确定充电变量.
- 提高复杂ADC结构的icIEF方法的分辨率和稳定性指示能力.
- 根据ADC的物理化学特性,为选择合适的方法参数提供指导.
主要方法:
- 对高DARADCs (DAR 4-8) 的icIEF方法的系统开发和优化.
- 调查各种类型,比例和溶解剂和载体桃体的组合.
- 询问聚焦参数,包括异电聚焦时间.
- 评估缓冲系统的样本稳定性与不稳定的有效载荷连接器.
主要成果:
- 方法优化成功提高了高DARADC的分辨率和稳定性指示能力.
- 缓冲器,溶解剂和合体的选择是由链接器结构,DAR和有效载荷化学决定的.
- 与含PEG链接剂的高DARADCs相比,与链接剂相比,需要更强的变质剂/溶解剂.
- 缓冲系统提高了不稳定的有效载荷连接器的样本稳定性,确保了方法的稳定性.
- 与相应的抗体相比,ADCs需要更长的同电聚焦时间.
结论:
- 这项研究是首次对ICIEF方法开发进行全面的研究,用于分析高DARADC的电荷变量.
- 这些发现提供了有价值的见解和一个系统的战略,用于开发强大的ICIEF方法复杂的ADC具有独特的属性.
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