双重AAV介导的人类奥托费林表达的恢复动力学
Jonathan B Sellon1, Kathy S So1,2, Andrew D'Arcangelo1
1Decibel Therapeutics, Inc., Boston, MA, United States.
Frontiers in molecular neuroscience
|July 2, 2024
概括
双重腺相关病毒 (AAV) 载体可以恢复头发细胞中的奥托弗林 (OTOF) 表达. 这项研究用一种对治疗聋至关重要的ex vivo模型来描述OTOF表达的时间和动力学.
科学领域:
- 遗传学 是一个遗传学.
- 耳鼻喉科 耳鼻喉科 耳鼻喉科
- 分子生物学分子生物学
背景情况:
- 遗传性聋通常是由奥托弗林 (OTOF) 基因突变引起的.
- 双腺相关病毒 (AAV) 基因疗法是治疗OTOF缺陷的前临床方法.
- 双重AAV介导的OTOF表达的动力学仍然没有特征.
研究的目的:
- 建立一种ex vivo测定方法,以确定小鼠毛细胞中双AAV介导的OTOF表达的动力学.
- 为了描述转导,mRNA重组和蛋白质表达的时间.
- 评估载体比率和促进体特异性的影响.
主要方法:
- 开发了一种使用双重重组合AAV载体 (DB-OTO) 向OTOF的ex vivo测定.
- 利用Myo15促进剂进行毛细胞特异性表达.
- 在OTOF缺乏的小鼠模型中研究了剂量反应,载体比和表达动力学.
- 确定表达平原时间 (14-21天活体).
主要成果:
- 在ex vivo毛细胞中双重AAV介导的OTOF表达的确立动力学.
- 在毛细胞中证明了Myo15促进体特异性和AAV1耐受性.
- 发现非等分向量比对OTOF重组的影响很小.
- 在体外14-21天内确定了OTOF mRNA和蛋白质表达的平原.
结论:
- 一个ex vivo模型系统有效地描述了OTOF的双AAV表达动力学.
- 表达动力学和恢复时间在ex vivo和in vivo模型之间是可比的.
- 这些发现支持开发基于AAV的基因疗法来治疗与OTOF相关的聋.
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