在CRISPR-Cas9中介的dsRNase淘汰中,提高了秋季军的RNAi效率
Jinmo Koo1, Guan-Heng Zhu1, Subba Reddy Palli1
1Department of Entomology, College of Agriculture, University of Kentucky, Lexington, KY 40546, USA.
Pesticide biochemistry and physiology
|April 6, 2024
概括
像秋季军虫 (FAW) 这样的虫昆虫对RNA干扰 (RNAi) 具有抗性,这是由于中肠酶降解双链RNA (dsRNA) 的原因. 删除这些dsRNase基因可以提高FAW中的RNAi疗效.
科学领域:
- 昆虫学 昆虫学是一门学科.
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 类昆虫对RNA干扰 (RNAi) 具有抗性,特别是在使用口服输送的双链RNA (dsRNA) 时.
- 中肠光线中的高核酶活性是这种RNAi不敏感的首要原因.
- 秋季军 (FAW),Spodoptera frugiperda,是一个重要的农业害虫,改善RNAi策略至关重要.
研究的目的:
- 为了研究中肠dSRNases在Lepidopteran昆虫的RNAi耐火性质中的作用.
- 开发一种方法,通过向dSRNase活动来提高秋季军中的RNAi效率.
主要方法:
- 在FAW中肠中,鉴定和表征了三个高度表达的dsRNase基因.
- 使用CRISPR-Cas9基因编辑创建一个同卵性突变FAW线,删除已识别的dsRNase基因.
- 评估突变型幼虫与野生类型幼虫的中肠光中的dsRNA降解水平.
- 评估向突变型和野生型FAW中抑制细胞灭亡 (IAP) 基因的RNAi的疗效.
主要成果:
- 确定了三种dsRNase基因,并发现它们在FAW中肠中表达高.
- 这三种dsRNase基因的CRISPR-Cas9调节删除导致突变幼虫的中肠膜中dsRNA降解的减少.
- 向IAP基因的RNAi导致突变FAW幼虫的目标基因敲除率显著提高,死亡率增加,与野生类型相比.
- 这些发现表明,中肠dSRNases是FAW中RNAi低效的关键贡献者.
结论:
- 中肠dSRNases在秋季军中观察到的RNAi缺陷表型中发挥着关键作用.
- 基因组编辑以去除dsRNase基因可以增强类昆虫的RNAi有效性.
- 开发可以防止酶降解的dsRNA配方可以改善FAW和其他类动物的基于RNAi的害虫控制策略.
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