在iPSC衍生的神经元中通过个性化基层编辑建模和纠正蛋白质构造性疾病
bioRxiv : the preprint server for biology
|January 31, 2024
概括
基因编辑纠正了导致神经塞尔纳入体 (FENIB) 的家族脑病变的突变. 这种方法减少了细胞模型中的有毒蛋白聚合物,为FENIB和类似的神经退行性疾病提供了潜在的治疗方法.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 遗传学 是一个
- 分子生物学分子生物学
背景情况:
- 改变的蛋白质构造是神经退行性疾病的基础.
- 在SERPINI1基因的突变导致神经胺聚合,导致神经元死亡在家族脑病与神经胺含体 (FENIB).
研究的目的:
- 开发和验证FENIB的腺基编辑器 (ABE) 介导的基因校正策略.
- 评估ABE在纠正致病性SERPINI1变体和恢复神经元功能的有效性.
- 为在神经退行性疾病中的潜在临床应用优化ABE交付.
主要方法:
- 开发FENIB的HEK293T和诱导多能干细胞 (iPSC) 模型.
- 使用个性化的腺基编辑器 (ABE) 来纠正致病性SERPINI1变种.
- 采用一种可诱导突变神经-GFP (MUT NS-GFP) 神经元系统来研究蛋白质聚合.
- 设计了神经元特定的病毒样颗粒,以增强ABE传递.
主要成果:
- 在FENIB模型中,ABE介导的校正恢复了神经元树突形态.
- ABE治疗显著降低了神经塞尔内置的数量和大小.
- 早期预防有毒蛋白质表达促进了聚合物的清除,而晚期预防则阻止了聚合.
- 神经元特异性病毒载体提高了ABE传递效率.
结论:
- 个性化的ABE介导基因校正是FENIB的一个有前途的策略.
- 这种方法显示出治疗其他由蛋白质错误折叠引起的神经退行性疾病的潜力,例如阿尔茨海默氏症和亨廷顿氏症.
- 优化病毒传递系统对于基因编辑疗法的临床转化至关重要.
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