对腺相关病毒生产系统的比较转录组和蛋白组动力学分析
Yu-Chieh Lin1, Min Lu1, Wen Cai1
1Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue S.E, Minneapolis, MN, 55455-0132, USA.
Applied microbiology and biotechnology
|June 19, 2024
概括
合成复合腺相关病毒 (rAAV) 细胞系显示囊体的产量低于野生类型系统. 提高囊体合成和包装对于提高rAAV载体的生产率和质量至关重要.
科学领域:
- 生物技术是生物技术.
- 分子生物学分子生物学
- 基因治疗 基因治疗
背景情况:
- 复合腺相关病毒 (rAAV) 是基因传递的关键载体.
- 稳定的生产细胞线为rAAV制造提供了优势.
- 优化rAAV生产需要了解细胞和病毒因素.
研究的目的:
- 为了比较合成rAAV生产细胞系 (GX2) 与野生类型AAV (wtAAV) 生产系统的生产率和载体质量.
- 确定限制合成细胞系中rAAV生产的关键因素.
- 通过多omics分析,获得提高rAAV生产力和矢量质量的见解.
主要方法:
- 构建一个稳定的基于HEK293的合成rAAV生产细胞系 (GX2) 带有可诱导的促进剂.
- 对GX2的比较转录和蛋白质组分析与通过共感染和多等离子体转染产生wtAAV.
- 病毒基因组,囊位和蛋白质表达水平的量化.
主要成果:
- 虽然GX2产生了类似的AAV基因组,但其囊位数比wtAAV系统要低一个数量级.
- 基因组包装效率在GX2中较低,尽管Rep52蛋白质水平较高.
- 野生类型系统显示出更高的病毒蛋白 (VP) 积累;GX2表现出高载荷基因表达,并诱导宿主反应,如炎症和改变线粒体功能.
结论:
- 野生型AAV感染在产生完整的病毒颗粒方面比合成细胞系GX2.2更有效.
- 没有足够的囊蛋白合成,基因组复制或包装效率可能会限制GX2.2中的rAAV产生.
- 无论是GX2中的rAAV生产还是wtAAV感染,都会触发类似的宿主细胞反应,包括免疫激活和代谢变化.
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