Journal
NATURE BIOTECHNOLOGY
Volume 38, Issue 7, Pages 845-855Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41587-020-0565-5
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As CRISPR therapies move into clinical testing, David Schaffer and colleagues review a raft of different delivery technologies being road tested to address cargo capacity limitations, maximize potency, minimize off-target effects and avoid immunogenicity. Genome editing has the potential to treat an extensive range of incurable monogenic and complex diseases. In particular, advances in sequence-specific nuclease technologies have dramatically accelerated the development of therapeutic genome editing strategies that are based on either the knockout of disease-causing genes or the repair of endogenous mutated genes. These technologies are progressing into human clinical trials. However, challenges remain before the therapeutic potential of genome editing can be fully realized. Delivery technologies that have serendipitously been developed over the past couple decades in the protein and nucleic acid delivery fields have been crucial to genome editing success to date, including adeno-associated viral and lentiviral vectors for gene therapy and lipid nanoparticle and other non-viral vectors for nucleic acid and protein delivery. However, the efficiency and tissue targeting capabilities of these vehicles must be further improved. In addition, the genome editing enzymes themselves need to be optimized, and challenges regarding their editing efficiency, specificity and immunogenicity must be addressed. Emerging protein engineering and synthetic chemistry approaches can offer solutions and enable the development of safe and efficacious clinical genome editing.
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