在Sf9系统中探索AAV生产的综合Kozak序列景观
Oleksandr Kondratov1, Sergei Zolotukhin1
1Division of Cellular and Molecular Therapy, Department of Pediatrics, College of Medicine, University of Florida, Gainesville, FL 32610, USA.
Viruses
|October 28, 2023
概括
我们开发了一种新的定向进化协议,以改善重组腺相关病毒 (rAAV) 的产生. 这种方法提高了基因治疗应用的产量和传染性.
科学领域:
- 生物技术和基因疗法
- 病毒学 病毒学
- 分子生物学分子生物学
背景情况:
- 再组合腺相关病毒 (rAAV) 对于基因疗法至关重要,需要可扩展的制造.
- 百科病毒/Sf9系统提供了高产量,但由于改变了囊体静态度,通常会导致较低的生物效能.
- 优化rAAV体组成是提高生产产量和传染性的关键.
研究的目的:
- 通过包装和转导效率来定义的腺相关病毒 (AAV) 囊体的"适应性"概念.
- 开发一种新的定向进化 (DE) 协议,以优化Sf9制造的rAAV的结构和生物适应性.
- 为了确定最佳的AAV囊组合物,以改善基因治疗载体的生产.
主要方法:
- 开发了一种使用昆虫Sf9细胞用于rAAV生产的定向进化 (DE) 协议.
- 创建了一个组合式囊库,用于在Sf9细胞中包装.
- 在人类C12细胞中选了图书馆的高传染性,随后进行了下一代测序 (NGS) 和分析.
主要成果:
- 通过DE协议,成功地确定了具有高产量和优异传导效率的"合适"AAV体.
- 单一轮的DE选择,结合NGS和in silico分析,精确地确定了最佳的VP1翻译启动地点 (Kozak序列).
- 这种方法可以为特定的血清型优化rAAV囊.
结论:
- 新的DE协议有效地提高了在昆虫细胞中产生的rAAV的结构和生物适应性.
- 通过DE优化AAV囊体积测量对于改善基因疗法载体强度至关重要.
- 这一策略为基因治疗的可扩展和高效的rAAV制造提供了一个强大的工具.
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