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以AAV为媒介的基因尾酒增强了支持细胞重编程和毛细胞再生的功能

Liyan Zhang¹, Xin Chen¹, Xinlin Wang¹

¹State Key Laboratory of Digital Medical Engineering, Department of Otolaryngology-Head and Neck Surgery, Zhongda Hospital, School of Life Sciences and Technology, School of Medicine, Advanced Institute for Life and Health, Jiangsu Province High-Tech Key Laboratory for Bio-Medical Research, Southeast University, Nanjing, 210096, China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

|May 29, 2024

概括

科学家通过诱导支持细胞 (SC) 进行转基因分化,在小鼠中再生了听觉毛细胞 (HC). 这种基因治疗方法,使用AAV介导的转录因子 (GPAS) 传递,成功地恢复了功能性的内部HCs,为听力恢复提供了希望.

科学领域:

耳鼻神经科学耳鼻神经科学
再生医学是一种再生医学.
基因治疗基因治疗

背景情况:

哺乳动物耳毛细胞 (HCs) 对听力至关重要;它们的损伤导致不可逆转的听力损失.
从支持细胞 (SC) 中再生受损的HC是恢复听觉功能的关键策略.
识别促进HC再生的因素对于治疗开发至关重要.

研究的目的:

研究共同表达特定转录因子 (GPAS) 的有效性,以诱导耳支细胞转分化为毛细胞.
评估新产生的毛细胞的发育轨迹和功能特征.
评估这种基因治疗方法在小鼠模型中体内毛细胞再生的潜力.

主要方法:

基因相关病毒 (AAV) 载体传递以准内耳干细胞用于基因表达.
在支持细胞中,Atoh1与其共同调节剂Gfi1,Pou4f3和Six1 (GPAS) 共同表达.
单细胞核测序和谱系追踪以分析细胞分化.
补丁电生理学,以评估再生毛细胞的功能.
在耳损伤的小鼠模型中进行体内毛细胞再生评估.

主要成果:

通过AAV介导的GPAS表达,成功地将耳支细胞转化为毛细胞.
虽然Atoh1单独启动了分化,但GPAS显著增强了内部和外部毛细胞的生成.
新生成的内毛细胞表现出类似于本地内毛细胞的电生理特性.
在小鼠模型中,GPAS诱导的再生被证明具有受损的毛细胞.

结论:

由AAV介导的GPAS共同调节是哺乳动物尾细胞功能性毛细胞再生的有力策略.
这种方法对开发新型疗法来恢复头发细胞损失后的听力功能具有前景.
该研究强调了特定的转录因子组合对指导细胞命运和实现功能再生的重要性.

关键词:

在 AAV AAV AAV 中.头发细胞的再生再生.多基因共同调节的多基因共同调节

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