一种腺相关病毒变体,能够在物种之间有效的眼球导向基因传递
Shuang Luo1,2,3, Hao Jiang1,3, Qingwei Li1,3
1Chengdu Origen Biotechnology Co. Ltd, Chengdu, 610036, China.
Nature communications
|May 6, 2024
概括
一种新的腺相关病毒 (AAVv128) 载体在动物模型中显示,对视网膜细胞的基因传递得到改善. 这种新型的载体显示出治疗新血管与年龄相关的黄斑退行症的希望,使用suprachoroidal交付.
科学领域:
- 眼科医生 眼科 眼科
- 基因治疗 基因治疗
- 分子生物学分子生物学
背景情况:
- 再组合腺相关病毒 (rAAVs) 是有效的基因治疗载体,但高剂量引发了安全问题.
- 超冠状腺注射用于非人类灵长类动物 (NHPs) 的眼部基因疗法,通常需要更高的剂量.
- 开发更安全,更有效的眼部基因治疗载体对于治疗视网膜疾病至关重要.
研究的目的:
- 为了介绍和描述一种新的腺相关病毒 (AAV) 囊体,AAVv128.8.
- 在不同的动物模型中评估AAVv128在不同眼睛组织中的转导效率和组织分布.
- 评估AAVv128在使用超冠状腺输送途径治疗新血管与年龄相关的黄斑变性 (nAMD) 的治疗潜力.
主要方法:
- 一种新型AAV囊体 (AAVv128) 的开发和表征.
- 在老鼠,子和NHP中注射AAVv128以评估转导效率和组织分布.
- 在激光诱导胆道新血管化 (CNV) NHP模型中评估AAVv128-anti-VEGF载体的疗效.
- 用冷电子显微镜 (cryo-EM) 分析AAVv128的结构.
主要成果:
- AAVv128在光受体和视网膜色素上皮细胞 (RPE) 中显著提高了转导效率.
- 在多种动物模型中观察到AAVv128在视网膜层中的更广泛分布.
- 在一个nAMD NHP模型中,AAVv128-anti-VEGF的超冠状腺输送完全抑制了IV级病变.
- 冷EM揭示了AAVv128的增强结合,核吸收和内体细胞逃脱能力.
结论:
- AAVv128是一种高效的下一代眼睛基因治疗载体.
- 与AAVv128相结合的超冠状腺输送途径显示出对nAMD的显著治疗潜力.
- 改善的AAVv128生物特性为眼部基因疗法应用提供了优势.
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