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重组腺相关病毒产生适应悬浮生长的细胞系的转录基因功能特征
Han-Jung Kuo1, Prahalad Srinivasan1, Yu-Chieh Lin1
1Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota, USA.
Biotechnology progress
|May 21, 2025
概括
合成生物学创造了HEK293细胞系,用于高复合腺相关病毒 (rAAV) 生产. 将这些细胞系适应悬浮生长减少了rAAV标位,但优化策略对可扩展的基因疗法载体制造有希望.
科学领域:
- 合成生物学 合成生物学
- 基因治疗载体生产生产的基因疗法.
- 细胞线工程 细胞线工程
背景情况:
- 复合腺相关病毒 (rAAV) 是基因治疗中的关键输送载体.
- 可扩展的生产方法对于临床基因疗法应用至关重要.
- HEK293细胞通常用于rAAV生产,但附着培养限制了可扩展性.
研究的目的:
- 开发一种合成生物学方法,用于使用工程HEK293细胞系生产高位数rAAV.
- 在保持rAAV生产率的同时,为可扩展的悬浮培养适应附着细胞系.
- 研究悬浮培养在rAAV生产期间对细胞反应的影响.
主要方法:
- 开发了工程HEK293细胞系,其中包含用于RAAV和辅助功能的综合基因元素.
- 附着细胞系适应了在无血清介质中的悬浮生长.
- 进行了转录组分析,以比较粘附和悬浮培养之间的细胞反应.
- 操纵培养条件以优化悬浮中的rAAV生产.
主要成果:
- 工程细胞系在附着培养中实现了高rAAV生产率.
- 适应悬浮生长最初导致显著减少病毒标位.
- 在动下恢复粘附介质,部分恢复了生产力 (25%-50%的粘附水平).
- 转录组分析揭示了在粘附与悬浮培养中对rAAV生产的明显细胞反应.
结论:
- 合成细胞系为rAAV生产提供了一个可行的平台.
- 悬浮培养物的适应对保持高rAAV标位提出了挑战.
- 需要进一步优化才能充分实现可扩展的,高滴度的rAAV在基因治疗中悬浮的生产.
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