MicroRNA-responsive release of Cas9/sgRNA from DNA nanoflower for cytosolic protein delivery and enhanced genome editing.
basic_science · Level V
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- Record sourced from PubMed, PMID 32738651.
- Also identified by DOI 10.1016/j.biomaterials.2020.120221.
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Abstract
Nanoparticle-based CRISPR/Cas9 delivery systems hold great promise for specific and precise treatment of genetic disorder diseases. Herein, we developed a DNA nanoflower-based platform for microRNA-responsive cytosolic delivery of Cas9/sgRNA complex into tumor cells. The biocompatible DNA nano-vehicles can efficiently load Cas9/sgRNA by sequence hybridization. Importantly, this hybridization can be replaced by a tumor specific miRNA through toehold-mediated strand displacement process and achieve cell-type-specific release of Cas9/sgRNA from the DNA nanoflowers. We have verified that this miRNA-responsive releasing process can significantly improve the genome editing efficiency comparing with non-responsive control. This strategy suggests a versatile way for designing more specific and efficient CRISPR-based genome therapy system by incorporating stimuli-responsive Cas9/sgRNA release process.
Medical subject headings
- Gene Editing
- MicroRNAs