通过强离子交换色谱学准备剂丰富完整的AAV体
Suriyasri Subramanian1, Marcin Dembek2, Nadia Auchus1
1Purification Process Sciences, Biopharmaceutical Development, BioPharmaceuticals R&D, AstraZeneca, Gaithersburg, Maryland, USA.
Biotechnology progress
|August 14, 2025
概括
制造复合腺相关病毒 (rAAV) 载体需要将空体与满体分开. 这项研究提出了一种高效的同位素化方法,使用Capto QTM树脂来改善rAAV的净化和回收.
科学领域:
- 生物技术是生物技术.
- 基因治疗 基因治疗
- 生物加工是一种生物加工.
背景情况:
- 再组合腺相关病毒 (rAAV) 载体对于体内基因治疗至关重要.
- 在rAAV制造中,一个重大挑战是将空体与含有基因组的完整体分开.
- 目前的方法,如线性渐变离子交换色谱,难以扩展,导致完全体的回收率很低.
研究的目的:
- 开发一种替代性的,可扩展的下游净化工作流程,用于分离空和满的rAAV囊.
- 优化使用Capto QTM树脂的同位素化方法,以提高净化效率.
- 通过使用开发的方法来评估完整的rAAV体的回收和纯度.
主要方法:
- 开发了一种使用Capto QTM树脂与同位素解的工作流程.
- 预先的导电性选确定了最佳的盐度,用于清除空体.
- 实施了两步化策略,并使用不同的rAAV血清型进行了测试.
主要成果:
- 该方法实现了大约65%的完整rAAV8和rAAV9体的回收,其纯度分别超过80%和90%.
- 对rAAV6.2的工艺开发需要调整,包括修改的化盐和增加的MgCl2度.
- 一个针对rAAV6.2的优化方案,使得68%的完整体在纯度>80%的情况下得到回收.
结论:
- 开发的同位素化工作流提供了一个可行的替代方案,用于分离空和满的rAAV囊.
- 与传统技术相比,这种方法表明了可扩展性和改善的回收率.
- 工作流可以适应不同的rAAV血清型,解决一个关键的制造瓶.
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