基RNA编辑疗法可以治疗由OTOF基因突变引起的听力损失
Yuanyuan Xue1, Yong Tao2, Xing Wang3
1Department of Otolaryngology-Head and Neck Surgery, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200011, China; HuidaGene Therapeutics Co., Ltd., Shanghai 200131, China.
概括
一种新的基因编辑工具有效地恢复了Otoferlin (OTOF) 基因突变的小鼠的听力. 这种增强的迷你dCas13XRNA基编辑器 (emxABE) 为与OTOF相关的耳聋提供了一个有前途的治疗策略.
科学领域:
- 遗传学 遗传学 是一个
- 眼科医生 眼科 眼科
- 分子生物学分子生物学
背景情况:
- 奥托弗林 (OTOF) 基因突变是导致听力神经病变和聋的主要原因.
- 具体的c.2485C>T (p.Q829X) 变种占西班牙衰退性语言前聋症的3%左右.
- 以往基于AAV的OTOF过度表达策略显示治疗效果有限.
研究的目的:
- 开发和评估一个增强的迷你dCas13XRNA基编辑器 (emxABE),用于治疗OTOFQ829X引起的听力损失.
- 在小鼠模型中评估emxABE介导基因校正的效率和耐用性.
主要方法:
- 一个增强的迷你dCas13XRNA基编辑器 (emxABE) 被设计并通过AAV9变种交付.
- 该系统在内毛细胞中实现了高传染效率 (>90%).
- 在人性化OtofQ829X/Q829X小鼠中测量了氨酸转化为氨酸的效率.
主要成果:
- 在准OTOFQ829X时,emxABE显示了~80%的腺转化为氨酸的效率.
- 在新生小鼠中,单次的基层介质注射恢复了几乎所有内毛细胞中的OTOF表达.
- 听觉功能显著改善到野生类型的水平,持续至少7个月.
结论:
- 通过AAV9传递的emxABE提供了一个非常有效的策略来治疗与OTOF相关的听力损失.
- 治疗恢复了小鼠的听觉功能,证明了长期的疗效.
- emxABE代表了一种用于基因治疗的多功能平台,针对具有过早终止编码子的单基因疾病.
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