特定物种的AAVR主导着腺相关病毒 (AAV) 载体的物种热带性
Mark Kay1, Yuqian Jiang1, Yiming Liu1
1Stanford University.
Research square
|December 11, 2025
概括
AAV载体转导因物种而异,阻碍了临床转化. 一种特定的囊体修饰 (265G插入) 和理解AAVR受体相互作用提高了跨物种基因治疗的可预测性.
科学领域:
- 分子生物学分子生物学
- 基因治疗 基因治疗
- 病毒学 病毒学
背景情况:
- 亚地诺相关病毒 (AAV) 载体转导效率因物种而异.
- 这种物种间的变异性使得临床前发现转化为人类临床试验变得复杂.
- 之前的工作引入了265G插入到AAV-LK03囊体 (AAV-AM) 进行增强的跨物种转导.
研究的目的:
- 为了研究AAV体物种特异性的cis介导性质.
- 阐明AAVR受体在调解物种特异转导中的作用.
- 为了确定影响AAV热带的关键序列变异.
主要方法:
- 对AAV体特性和表面暴露的分析.
- 在体外和体内实验中使用AAVR补充剂的实验.
- 序列交换实验,以评估氨基酸对热流的影响.
主要成果:
- AAV体的物种特异性是由内在决定的 (cis介导),而不是由外部因素决定的 (转补).
- 265G插入被表面暴露,增强与AAVR受体的结合.
- 人类AAVR (hAAVR) 补充在小鼠模型中恢复了AAV-LK03转导.
- 在PKD2域中的特定氨基酸变异,特别是I426V,显著影响AAV-LK03物种热带性.
结论:
- AAV囊转导效率受到AAVR蛋白中特定物种变异的严重影响.
- 了解这些AAVR-囊体相互作用对于优化AAV基因治疗翻译至关重要.
- 这项研究为跨物种开发更可预测和更有效的基于AAV的治疗方法提供了洞察力.
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