Abstract
RNA interference (RNAi), a natural gene silencing process, is a widely used technique in basic research, preclinical studies, and drug development strategies. Although the technique has great potential to generate new human therapiesand treat undruggable diseases, the clinical application of RNAi is still challenging primarily because of the delivery problem and potential off-target effects. Over the past two decades, great efforts have been undertaken to develop delivery agents and chemical modifications to overcome these challenges. Such advances in RNA delivery and chemical modifications have benefited researchers who are developing gene-editing therapies based on CRISPR-Cas9, an RNA-guided endonuclease, which is already having a major impact on biology and medicine. Here, I review the discovery of these two interference tools, identify the technical challenges yet to be overcome and provide some perspectives on how these two RNA-based technologies can be harnessed to treat human diseases.
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