JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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Delivery of an Artificial Transcription Regulator dCas9-VPR by Extracellular Vesicles for Therapeutic Gene Activation.

ACS Synthetic Biology 2018 December 22
The CRISPR/Cas system has been developed as a potent tool for genome engineering and transcription regulation. However, the efficiency of the delivery of the system into cells, particularly for therapeutic in vivo applications, remains a major bottleneck. Extracellular vesicles (EVs), released by eukaryotic cells, can mediate the transfer of various molecules, including nucleic acids and proteins. We show the packaging and delivery of the CRISPR/Cas system via EVs to the target cells, combining the advantages of both technological platforms. A genome editing with designed extracellular vesicles (GEDEX) system generated by the producer cells can transfer the designed transcriptional regulator dCas9-VPR complexed with appropriate targeting gRNAs enabling activation of gene transcription. We show functional delivery in mammalian cells as well in the animals. The therapeutic efficiency of in vivo delivery of dCas9-VPR/sgRNA GEDEX is demonstrated in a mouse model of liver damage counteracted by upregulation of the endogenous hepatocyte growth factor, demonstrating the potential for therapeutic applications.

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