体树突转移CRISPR/Cas9等离子体DNA:优化和机制
Susanna Zamolo1, Elena Zakharova1, Lise Boursinhac2
1Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern Freiestrasse 3 3012 Bern Switzerland tamis.darbre@unibe.ch jean-louis.reymond@unibe.ch.
RSC chemical biology
|August 30, 2024
概括
这项研究引入了Z34,一种新型的型树突,用于将CRISPR/Cas9等离子体DNA输入细胞. Z34实现了高传染效率和功能性基因编辑,而不会损害细胞活力,提供了一个有前途的非病毒基因传递解决方案.
科学领域:
- 生物技术是生物技术.
- 分子生物学分子生物学
- 药物输送系统 药物输送系统
背景情况:
- 克里斯普尔/卡斯9基因编辑具有治疗前景,但在有效和安全的DNA传递方面面临挑战.
- 非病毒载体,特别是树体,被探索为替代病毒载体的等离子体DNA (pDNA) 转染.
- 结构-活性关系研究对于优化树枝状分子设计以提高基因传递效率至关重要.
研究的目的:
- 为了研究Z22的结构-活性关系,一个d-enantiomeric dendrimer,对于CRISPR/Cas9的pDNA转染.
- 识别关键的结构特征,如性和特定的氨基酸残留物,影响转化效率和功能.
- 为基因编辑应用开发一种优化的树突模拟物,以提高其性能.
主要方法:
- 合成和表征Z22 dendrimer类似物与性和氨基酸组成的变化.
- 评估pDNA结合亲和力和dendrimer-pDNA复合体的细胞吸收.
- 在HEK细胞中评估转染效率 (GFP表达) 和细胞活力.
- 确认功能性的CRISPR/Cas9介导的基因编辑后转移.
主要成果:
- 所有测试的树枝状分子类型都有效地结合了pDNA,并被细胞内化.
- 树突体的d-chirality对于成功的转染是必不可少的,可能是通过防止蛋白质分解和促进内分体逃逸和核入口.
- 通过去除非必不可少的氨酸残留物,获得了Z34,一种更活跃的类似物.
- Z34在HEK细胞中表现出超过83%的GFP转染效率,没有观察到毒性.
- Z34促进了功能性的CRISPR/Cas9基因编辑.
结论:
- 这种d-enantiomeric dendrimer Z34是一种非常有效的非病毒载体,用于CRISPR/Cas9的pDNA传递.
- Z34提供了一个安全有效的基因编辑平台,显示高转染率和功能基因修改.
- 固相合成的可访问性使Z34成为进一步治疗开发的有吸引力的候选人.
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