稳定的Cas9表达通过促进mTORC2激活来调节细胞生长
Le Yu1,2, Yi Jin1,2, Jianfeng Chen1,2
1Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, United States.
Nucleic acids research
|September 29, 2025
概括
克里斯普尔基因编辑工具Cas9可以通过与核糖体蛋白相互作用激活mTORC2通路,无意中改变细胞生长. 这一发现强调了在研究和治疗中需要更安全的Cas9变体.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 遗传学 是一个遗传学.
背景情况:
- 克里斯普尔-Cas9是一种强大的基因编辑技术.
- Cas9表达对哺乳动物细胞行为的影响尚未完全理解.
- 了解Cas9的非目标效应对于安全应用至关重要.
研究的目的:
- 研究稳定的Cas9表达对各种癌症和非癌症细胞系细胞生长的影响.
- 阐明细胞生长中Cas9介导的改变背后的分子机制.
- 确定受Cas9.9影响的新型相互作用和信号通路.
主要方法:
- 在32个细胞系上对Cas9表达效应的系统分析.
- 蛋白质组分析以确定SpCas9互动组.
- RNA测序 (RNA-seq) 用于分析基因表达变化.
- 生物化学测试以验证蛋白相互作用和通路激活.
主要成果:
- 在测试细胞系的子集中,Cas9表达改变了细胞生长.
- 确定了核糖体蛋白质是SpCas9.9的关键相互作用体.
- Cas9表达激活PI3K信号传递和增强mTORC2通路活动.
- SpCas9充当了支架,稳定了核糖体蛋白和Sin1之间的相互作用,导致mTORC2激活的增加.
结论:
- 一个新的Cas9-ribosome-mTORC2信号轴促进细胞生长.
- 在CRISPR应用中,Cas9的意外细胞影响需要仔细考虑.
- 设计更安全的Cas9变种对于推动生物医学研究和临床疗法至关重要.
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