MiR-ON-CRISPR:微RNA激活的CRISPR-dCas9系统用于活细胞和败血症小鼠模型中的精确基因治疗
Wen-Jie Shu1,2, Zhe Ma2, Lijun Jia1
1Department of Medical Oncology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710004, China.
Nucleic acids research
|October 21, 2025
概括
我们开发了一种新的微RNA激活的CRISPR-dCas9系统 (miR-ON-CRISPR),用于精确控制基因表达. 这一系统显示了针对性基因疗法和疾病治疗的前景.
科学领域:
- 分子生物学分子生物学
- 基因编辑技术 基因编辑技术
- 生物医学应用 生物医学应用
背景情况:
- 克里斯普尔-dCas9技术提供了强大的基因操纵能力.
- 控制CRISPR-dCas9活动对于安全性和更广泛的应用至关重要.
- 微RNAs (miRNAs) 是基因表达的关键调节者.
研究的目的:
- 设计和验证一个微RNA激活的CRISPR-dCas9系统 (miR-ON-CRISPR).
- 为了实现对基因表达的精确,依赖miRNA的控制.
- 探索这种可控制的基因编辑系统的治疗应用.
主要方法:
- 设计的dCas9和sgRNA组件对内源性miRNAs有反应.
- 开发了一个AND/OR门系统,用于同时检测两个miRNAs.
- 在体内利用该系统激活细胞特异性杀伤基因 (DTA,BAX) 和Nrf2.
- 在败血症的小鼠模型中测试了该系统.
主要成果:
- miR-ON-CRISPR成功地可视化了miRNA活动和神经细胞分化.
- 证明了两个不同的miRNAs的同时检测.
- 在小鼠中实现了细胞类型特定的杀死和减轻了败血症引起的肝损伤.
- 通过Nrf2激活,通过Nrf2激活显示氧化和内细胞网膜应激的减少.
结论:
- 该miR-ON-CRISPR系统为miRNA调节的基因表达控制提供了一种新的方法.
- 这项技术可以实现特定细胞类型的CRISPR-dCas9活性.
- 验证了遗传疾病和败血症治疗的潜在治疗应用.
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