一个在线缓冲区交换平台用于AAV和AAV抗体复合物的电荷检测质谱分析
Chen Du1, Victoria C Cotham1, Garima Thakur2
1Analytical Chemistry Group, Regeneron Pharmaceuticals Inc., Tarrytown, New York 10591, United States.
Journal of the American Society for Mass Spectrometry
|September 3, 2025
概括
基于尺寸排除色谱的新流注射与电荷检测质谱 (SEC-FI-CDMS) 自动化了腺相关病毒 (AAV) 的表征. 这种方法通过准确分析AAV和抗体装饰的AAV来增强基因治疗载体的发展.
科学领域:
- 生物技术和基因治疗
- 分析化学
- 质谱学
背景情况:
- 腺相关病毒 (AAV) 是基因治疗的关键载体,有望治疗各种疾病.
- 抗体重定位的AAV增强了特异性和安全性,但由于样本异质性,其表征存在挑战.
- 传统的鉴定方法与AAV和AAV-抗体复合物的复杂性作斗争,需要先进的技术.
研究的目的:
- 开发一种高分辨率的自动化技术,用于表征复杂的腺相关病毒 (AAV) 样本和AAV抗体复合物.
- 为了克服手动,静态输液方法在AAV分析中的电荷检测质谱 (CDMS) 的局限性.
- 支持下一代基因疗法的开发和制造,通过实现全面的AAV特征.
主要方法:
- 开发一个新的自动化平台:基于尺寸排除色谱的流量注入与电荷检测质谱 (SEC-FI-CDMS).
- 使用双流设置进行简化样本引入,包括在线脱盐和稳定注入用于基于Orbitrap的CDMS分析
- 直接测量离子电荷以分析AAV基因组包装比率,囊组合,有效载荷变化和抗体装饰.
主要成果:
- SEC-FI-CDMS平台准确地确定了AAV基因组包装比率和质量.
- 在AAV样本中成功区分了体组合和有效载荷变化.
- 在AAV-抗体复合体上有效解决了抗体装饰,提供了详细的结构洞察力.
结论:
- 自动化的SEC-FI-CDMS平台显著改善了复杂的AAV载体和抗体装饰的AAV的特征.
- 这种全面的分析能力支持AAV制造和开发的关键方面.
- 这项技术为未来的基因治疗应用提高了效率和安全性铺平了道路.
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