在体内对人类造血干细胞和祖细胞进行基因编辑,使用外工程病毒样颗粒进行编辑
Vladimir V Botchkarev1, Sean Harrington1, Matteo Stoppato1
1Sana Biotechnology, Inc., Cambridge, MA, USA.
Nature biotechnology
|December 5, 2025
概括
工程病毒样颗粒 (VLPs) 提供了一种新的方法来编辑人类干细胞中的基因. 这些VLP通过精确向造血干细胞和原始细胞 (HSPCs) 来治疗遗传性血液疾病具有前途.
科学领域:
- 生物技术是生物技术.
- 基因治疗 基因治疗
- 血液学 血液学 血液学
背景情况:
- 人工病毒样颗粒 (VLPs) 正在探索在人类造血干细胞和祖先细胞 (HSPCs) 中进行基因编辑.
- 开发高效和特定的传递系统对于成功的体内基因编辑疗法至关重要.
研究的目的:
- 设计和评估两个新型的VLP包裹用于人体HSPCs的体外和体内基因编辑.
- 在相关模型中评估VLP介导的基因编辑的效率,特异性和安全性.
主要方法:
- 设计并测试了两种VLP包裹:一种优化内源逆转录病毒 (BaEVTR) 和一种针对CD133的包裹.
- 在实验室和体内对人HSPCs的评估VLP转导,对目标位点的基因编辑 (β2微球蛋白,BCL11A,HBG1/2).
- 在人性化的肝脏模型中评估VLP热带性,以评估肝细胞回避.
主要成果:
- 优化的BaEVTR VLP实现了长期人类HSPCs (31%的β2微球蛋白) 和血红蛋白病相关位点 (26%的BCL11A) 在体内显著的编辑.
- 与BaEVTR VLP相比,针对CD133的VLP显示了HSPCs在体内特异性的增强.
- 两种VLP设计都显示在人性化的肝脏模型中避免了人类肝细胞,这表明减少了目标外输送.
结论:
- 工程化VLP,特别是针对CD133的变异,代表了针对人类HSPCs的体内基因编辑的有希望的平台.
- 这些VLP显示出在遗传性血液疾病 (包括导致血红蛋白病变的疾病) 中具有治疗应用的潜力,在肝脏转导方面具有有利的安全性.
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