使用含有视网膜AAV的纤维素水凝植入物进行视网膜基因治疗
Brittni A Scruggs1,2, Aubrey Berger1,3, Travis Knudsen1
1Department of Ophthalmology, Mayo Clinic, Rochester, MN, USA.
Science advances
|September 5, 2025
概括
携带腺相关病毒 (AAV) 基因疗法的经皮膜水凝是一种更安全,更有效的替代品. 这种新的方法可以扩大视网膜色素表皮的传导,而不会引起炎症或缩.
科学领域:
- 眼科 眼科
- 基因治疗
- 生物材料
背景情况:
- 腺关联病毒 (AAV) 的视网膜下注射是视网膜基因治疗的常见途径,但可能导致胆管缩等不良事件.
- 目前的亚内输送方法往往导致局部转导,限制治疗疗效.
- 内注射虽然不那么侵入性,但通常会导致转导不足和炎症.
研究的目的:
- 开发和评估用于AAV基因治疗的新型视网膜水凝输送系统.
- 通过视网膜注射水凝的疗效和安全性与传统的内膜注射方法进行比较.
- 评估这种新技术在治疗视网膜退化方面的潜力.
主要方法:
- 制造了高度纤维素水凝以封装携带绿色光蛋白 (AAV2- GFP) 的腺相关病毒血清型2.
- 这些水凝以AAV分布,机械性能和传染性为特征.
- 在动物模型中进行了AAV2- GFP的视膜外,视膜下和视膜内放置 (分别为n=11,n=5和n=3).
主要成果:
- 在两例中,子视网膜注射导致不一致的视网膜色素表皮 (RPE) 转导,局部分娩和严重缩.
- 静脉内注射显示出弱转导和诱导炎症.
- 在几天内降解以获得广泛的RPE转导,没有观察到的缩或炎症.
结论:
- 在视网膜上放置纤维素-AAV水凝为视网膜基因治疗提供了一个有前途的替代方案.
- 这种方法克服了内注射和内注射的局限性,提高了安全性和有效性.
- 这项技术有可能为各种眼睛和全身疾病提供治疗.
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