在IAL-PiD2昆虫细胞中通过反应剂传递优化和细胞同步增强CRISPR同质定向修复
Bryce D Shirk1, Cecilia Z Rodriguez2, Marisa O Pacheco2
1J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL, 32611.
概括
这项研究在昆虫细胞中建立了CRISPR/Cas9同质导向修复 (HDR),用于精确的基因组编辑. 优化条件和细胞周期同步显著提高了非病毒基因传递的HDR效率.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 生物技术是生物技术.
背景情况:
- 克里斯普尔/卡斯9介导的同质导向修复 (HDR) 允许精确的基因组编辑,但在昆虫细胞系中未得到充分利用.
- 昆虫细胞系统对重组蛋白质生产有价值,并通过HDR提供了稳定,非病毒基因改造的潜力.
- 类飞的细胞系 *Plodia interpunctella* IAL-PiD2 对害虫管理和生物材料研究具有重要意义.
研究的目的:
- 在 *Plodia interpunctella* IAL-PiD2 昆虫细胞中建立一个强大的和可重复的 HDR 框架.
- 系统地评估影响这种昆虫细胞系的HDR效率的因素.
- 为了证明优化HDR对功能基因组学和昆虫应用目的的实用性.
主要方法:
- 对转染试剂的系统评价,Cas9:sgRNA分子比率,供体DNA度和同质手臂的长度.
- 优化核蛋白 (RNP) 复合体的形成和供体DNA模板的数量.
- 实施细胞循环同步使用基尿素以提高HDR效率.
主要成果:
- 一个Cas9:sgRNA核糖蛋白分子比为1:1和0.66 pmol的供体DNA模板最大限度地提高了整合效率.
- 细胞周期同步4小时后的基尿素治疗提高了HDR效率1.57-倍与异步细胞相比.
- 这项研究提供了细胞循环调节增强昆虫细胞HDR的第一个证据.
结论:
- 建立了成本效益高,可扩展的协议,用于在昆虫细胞中使用HDR传递非病毒基因.
- 将 IAL-PiD2 细胞定位为功能基因组学,精确害虫控制和重组蛋白质生产的多功能平台.
- 验证了HDR在昆虫中精确基因修饰的*in vivo*应用的潜力.
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