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Polyvalent guide RNAs for CRISPR antivirals
iScience ( IF 4.6 ) Pub Date : 2022-10-13 , DOI: 10.1016/j.isci.2022.105333
Rammyani Bagchi 1 , Rachel Tinker-Kulberg 1 , Mohammad Salehin 1 , Tinku Supakar 1 , Sydney Chamberlain 2 , Ayalew Ligaba-Osena 2 , Eric A Josephs 1, 2
Affiliation  

CRISPR effector Cas13 recognizes and degrades RNA molecules that are complementary to its guide RNA (gRNA) and possesses potential as an antiviral biotechnology because it can degrade viral mRNA and RNA genomes. Because multiplexed targeting is a critical strategy to improve viral suppression, we developed a strategy to design of gRNAs where individual gRNAs have maximized activity at multiple viral targets, simultaneously, by exploiting the molecular biophysics of promiscuous target recognition by Cas13. These “polyvalent” gRNA sequences (“pgRNAs”) provide superior antiviral elimination across tissue/organ scales in a higher organism () compared to conventionally-designed gRNAs—reducing detectable viral RNA by >30-fold, despite lacking perfect complementarity with either of their targets and, when multiplexed, reducing viral RNA by >99.5%. Pairs of pgRNA-targetable sequences are abundant in the genomes of RNA viruses, and this work highlights the need for specific approaches to the challenges of targeting viruses in eukaryotes using CRISPR.

中文翻译:


用于 CRISPR 抗病毒药物的多价向导 RNA



CRISPR 效应子 Cas13 可识别并降解与其向导 RNA (gRNA) 互补的 RNA 分子,并具有作为抗病毒生物技术的潜力,因为它可以降解病毒 mRNA 和 RNA 基因组。由于多重靶向是改善病毒抑制的关键策略,我们开发了一种设计 gRNA 的策略,其中单个 gRNA 同时通过利用 Cas13 混杂靶标的分子生物物理学使多个病毒靶标的活性最大化。与传统设计的 gRNA 相比,这些“多价”gRNA 序列 (“pgRNA”) 在高等生物体 () 中提供了跨组织/器官规模的卓越抗病毒消除能力——尽管与它们的任何一个靶标缺乏完美的互补性,但可将可检测的病毒 RNA 减少 >30 倍,并且在多重检测时,病毒 RNA 减少 >99.5%。成对的 pgRNA 靶向序列在 RNA 病毒的基因组中丰富,这项工作强调了使用 CRISPR 靶向真核生物中病毒的挑战需要特定的方法。
更新日期:2022-10-13
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