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Guanidinium-Functionalized Interpolyelectrolyte Complexes Enabling RNAi in Resistant Insect Pests.
Biomacromolecules ( IF 5.5 ) Pub Date : 2018-03-04 , DOI: 10.1021/acs.biomac.7b01717
Keith H Parsons 1 , Mosharrof H Mondal 2 , Charles L McCormick 1, 3 , Alex S Flynt 2
Affiliation  

RNAi-based technologies are ideal for pest control as they can provide species specificity and spare nontarget organisms. However, in some pests biological barriers prevent use of RNAi, and therefore broad application. In this study we tested the ability of a synthetic cationic polymer, poly-[ N-(3-guanidinopropyl)methacrylamide] (pGPMA), that mimics arginine-rich cell penetrating peptides to trigger RNAi in an insensitive animal- Spodoptera frugiperda. Polymer-dsRNA interpolyelectrolyte complexes (IPECs) were found to be efficiently taken up by cells, and to drive highly efficient gene knockdown. These IPECs could also trigger target gene knockdown and moderate larval mortality when fed to S. frugiperda larvae. This effect was sequence specific, which is consistent with the low toxicity we found to be associated with this polymer. A method for oral delivery of dsRNA is critical to development of RNAi-based insecticides. Thus, this technology has the potential to make RNAi-based pest control useful for targeting numerous species and facilitate use of RNAi in pest management practices.

中文翻译:

在抗虫害中使RNAi活化的胍基官能化的聚电解质复合物。

基于RNAi的技术非常适合有害生物控制,因为它们可以提供物种特异性和多余的非目标生物。但是,在某些害虫中,生物屏障会阻止RNAi的使用,因此具有广泛的应用前景。在这项研究中,我们测试了合成阳离子聚合物聚[[N-(3-胍基丙基)甲基丙烯酰胺](pGPMA)的能力,该聚合物模仿富含精氨酸的细胞穿透肽在不敏感的动物斜纹夜蛾(Spodoptera frugiperda)中触发RNAi。发现聚合物-dsRNA聚合电解质复合物(IPEC)被细胞有效吸收,并驱动高效的基因敲低。这些IPECs喂食Srug frugiperda幼虫后还可能触发靶基因敲低和中度幼虫死亡率。该作用是序列特异性的,这与我们发现与该聚合物有关的低毒性相一致。dsRNA口服递送的方法对于开发基于RNAi的杀虫剂至关重要。因此,该技术具有使基于RNAi的害虫控制可用于靶向多种物种并促进RNAi在害虫管理实践中使用的潜力。
更新日期:2018-02-15
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