AI Article Synopsis
- The FDA has approved the first siRNA drug, marking a major advancement in RNA interference technology.
- Off-target gene silencing remains a challenge in siRNA therapy, raising concerns about unintended effects.
- A new strategy using AGO2 mutants was developed to identify siRNA off-targets, enhancing our understanding of siRNA interactions and improving design rules for future therapies.
Article Abstract
Recently, the US Food and Drug Administration (FDA) approved the first small interfering RNA (siRNA) drug, marking a significant milestone in the therapeutic use of RNA interference (RNAi) technology. However, off-target gene silencing by siRNA remains one of the major obstacles in siRNA therapy. Although siRNA off-target effects caused by a mechanism known for microRNA (miRNA)-mediated gene repression have been extensively discussed, whether RNAi can cause unintended cleavage through the effector protein AGO2 at sites harboring partially complementary sequences to the siRNA remains unknown. Here, we report a strategy to establish a comprehensive picture of siRNA cleaved and noncleaved off-targets by performing SpyCLIP using wild-type and catalytically inactive AGO2 mutants in parallel. Additionally, we investigated naturally occurring cleavage events mediated by endogenous miRNAs using the same strategy. Our results demonstrated that AGO2 SpyCLIP is a powerful method to identify both the cleaved and noncleaved targets of siRNAs, providing valuable information for improving siRNA design rules.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7666362 | PMC |
| http://dx.doi.org/10.1016/j.omtn.2020.10.009 | DOI Listing |
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