腺基编辑器纠正了hiPSC和脏器官的ADPKD点突变
Jingwen Wang1, Yanling Qiu1, Lei Zhang2
1MOE Key Laboratory of Gene Function and Regulation, State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-Sen University, Guangzhou, Guangdong, 510275, China.
Advanced biotechnology
|January 30, 2025
概括
使用腺基编辑器 (ABE) 的基因治疗成功地纠正了PKD1突变,在一种自体主导多性病 (ADPKD) 模型中. 这种方法防止了脏器官中的囊形成,为ADPKD提供了一个有前途的新治疗策略.
科学领域:
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
- 再生医学是一种再生医学.
背景情况:
- 自体主导多囊性病 (ADPKD) 是一种由PKD1突变引起的遗传疾病,导致功能衰竭.
- 目前对ADPKD的治疗方法有限,并且没有基因治疗方法来纠正潜在的遗传缺陷.
研究的目的:
- 调查腺基编辑器 (ABE) 技术在纠正与ADPKD相关的特定PKD1突变方面的潜力.
- 开发和验证使用患者衍生的诱导多能干细胞 (iPSC) 和器官的ADPKD体外模型.
- 评估ABE介导的基因编辑作为ADPKD的治疗策略.
主要方法:
- 在PKD1基因中确定了两个ADPKD相关突变位点 (c.1198C>T和c.8311G>A).
- 在记者细胞系中测试了ABE变异校正效率,并从患者的外周血液单核细胞 (PBMC) 中生成iPSC.
- 将iPSCs分化为脏器官,使用福斯科林诱导囊性表型,并应用双重AAV分割-ABEmax系统进行基因编辑.
主要成果:
- 针对PKD1突变的ABE变体表现出不同的校正效率.
- 来自患者的iPSC器官在cAMP刺激时表现出类似ADPKD的囊性扩张,在ABE纠正的器官中可以阻止这种情况.
- 双AAV分割-ABEmax系统在脏器官中实现了约6.56%的平均编辑效率.
结论:
- ABE单基编辑为纠正ADPKD中的病原性PKD1突变提供了可行的框架.
- 经过ABE校正的iPSC衍生器官成功模拟了ADPKD,并证明了基因编辑的治疗潜力.
- 这项研究为ADPKD建立了一个有前途的基因治疗策略,有可能在未来临床转化.
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