转录水平和序列匹配是RNAi中非目标效应的关键决定因素
Jiasheng Chen1, Cheng-Wang Sheng1, Yingchuan Peng2
1Anhui Province Key Laboratory of Integrated Pest Management on Crops, School of Plant Protection, Anhui Agricultural University, Hefei 230036, China.
Journal of agricultural and food chemistry
|December 22, 2023
概括
双链RNA (dsRNA) 农药依赖于RNA干扰 (RNAi). 这项研究揭示了转录水平和序列匹配极大地影响dsrna的目标外效应,指导更安全的害虫控制应用.
科学领域:
- 农业科学 农业科学
- 分子生物学分子生物学
- 生物技术是生物技术.
背景情况:
- 使用双链RNA (dsRNA) 的RNA干扰 (RNAi) 显示出对害虫控制的前景.
- dsRNA的非目标效应限制了RNAi的应用,并引发了生态方面的担忧.
- 了解影响dsrna非目标效应的因素对于安全实施至关重要.
研究的目的:
- 研究调节dSRNA在基于RNAi的害虫控制中的非目标效应的关键因素.
- 确定基因表达水平,序列标识和dsRNA疗效之间的关系.
- 为设计更具特异性和效率的dsRNA农药提供指导方针.
主要方法:
- 与目标基因转录水平相关的dsRNA目标外影响的分析.
- 确定关键序列识别值,以实现目标外结合.
- 对连续匹配序列长度和不匹配容忍度的评估.
- 对dsRNA剂量对非目标效应的影响的评估.
主要成果:
- 非目标效应通过转录水平和序列匹配来调节.
- 与高度表达的基因相比,低表达的基因表现出较少的淘汰.
- 确定了大约80%的关键序列标识.
- 非目标效应是由连续匹配>15 nt或接近完美的匹配与1-2不匹配>19 nt.
- 增加dsRNA剂量会加剧非目标效应.
结论:
- 转录水平和序列特征是dsRNA目标外效应的关键决定因素.
- 特定的序列长度和身份参数可以预测和减轻非目标结合.
- 这些发现促进了选择性dsRNA农药的合理设计,以提高RNAi的有效性和安全性.
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