在溶液和活细胞中关闭CRISPR-Cas9活动的基于生物对称化学策略
Bhoomika Pandit1, Sweta Vangaveti2, Justa F Sentre1
1Department of Chemistry, University at Albany, 1400 Washington Ave. Albany, NY 12208, United States.
NAR molecular medicine
|February 13, 2026
概括
研究人员开发了一种新的小分子方法来控制CRISPR-Cas9基因编辑. 该系统使用生物对等化学来调节CRISPR-Cas9活动,为基因编辑应用提供精确的控制.
科学领域:
- 分子生物学分子生物学
- 生物化学 生物化学
- 生物工程是生物工程.
背景情况:
- 克里斯普尔-Cas9是一种强大的基因编辑工具,具有广泛的应用.
- 精确控制CRISPR-Cas9活动对于治疗和研究用途至关重要.
- 现有的CRISPR-Cas9控制方法存在局限性.
研究的目的:
- 开发一种基于小分子的新型系统来控制CRISPR-Cas9活动.
- 为了实现CRISPR-Cas9核酶功能的精确和可逆调节.
- 证明开发系统的广泛适用性和治疗潜力.
主要方法:
- 采用了四素 (Tz) 和跨环烯 (TCO) 之间的生物对等化学反应.
- 用Tz标记特定站点的单向导RNA (sgRNA),而不会影响其活性.
- 合成的TCO修饰抑制剂,包括一个细胞透,以抑制CRISPR-Cas9.
- 通过流细胞计和基因向 (GFP,VEGFA) 验证了该系统在溶液和活HEK293细胞中的有效性.
主要成果:
- 确定了一个独特的sgRNA修饰部位用于Tz标记.
- 经TCO修饰的抑制剂有效抑制了CRISPR-Cas9核酶活性.
- 一种TCO修饰的抑制剂显示出出色的细胞透性和有效性.
- 该方法成功地应用于三个不同的sgRNA,并在活细胞中证明了这一点.
- 证明了针对GFP的CRISPR-Cas9的失活,以及针对VEGFA的治疗应用的潜力.
结论:
- 开发的方法提供了对CRISPR-Cas9活动的稳健和最小扰乱的控制.
- 该系统能够使用TCO抑制剂和Tz修饰的sgRNA精确调节基因编辑.
- 这种广泛适用的平台为体外和体外受控基因编辑提供了显著的潜力.
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