CRISPR/dCas9-mediated transposition with specificity and efficiency of site-directed genomic insertions.

Autor: Goshayeshi L; Division of Biotechnology, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran.; Stem Cell Biology and Regenerative Medicine Research Group, Research Institute of Biotechnology, Ferdowsi University of Mashhad, Mashhad, Iran., Yousefi Taemeh S; Division of Biotechnology, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran.; Stem Cell Biology and Regenerative Medicine Research Group, Research Institute of Biotechnology, Ferdowsi University of Mashhad, Mashhad, Iran., Dehdilani N; Division of Biotechnology, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran.; Stem Cell Biology and Regenerative Medicine Research Group, Research Institute of Biotechnology, Ferdowsi University of Mashhad, Mashhad, Iran., Nasiri M; Recombinant Proteins Research Group, Research Institute of Biotechnology, Ferdowsi University of Mashhad, Mashhad, Iran.; Department of Animal Science, Ferdowsi University of Mashhad, Mashhad, Iran., Ghahramani Seno MM; Division of Biotechnology, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran.; Department of Basic Sciences, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran., Dehghani H; Division of Biotechnology, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran.; Stem Cell Biology and Regenerative Medicine Research Group, Research Institute of Biotechnology, Ferdowsi University of Mashhad, Mashhad, Iran.; Department of Basic Sciences, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran.
Jazyk: angličtina
Zdroj: FASEB journal : official publication of the Federation of American Societies for Experimental Biology [FASEB J] 2021 Feb; Vol. 35 (2), pp. e21359.
DOI: 10.1096/fj.202001830RR
Abstrakt: The ability and efficiency of targeted nucleases to perform sequence replacements or insertions into the genome are limited. This limited efficiency for sequence replacements or insertions can be explained by the dependency on DNA repair pathways, the possibility of cellular toxicity, and unwanted activation of proto-oncogenes. The piggyBac (PB) transposase uses a very efficient enzymatic mechanism to integrate DNA fragments into the genome in a random manner. In this study, we fused an RNA-guided catalytically inactive Cas9 (dCas9) to the PB transposase and used dual sgRNAs to localize this molecule to specific genomic targets. We designed and used a promoter/reporter complementation assay to register and recover cells harboring-specific integrations, where only by complementation upon correct genomic integration, the reporter can be activated. Using an RNA-guided piggyBac transposase and dual sgRNAs, we were able to achieve site-directed integrations in the human ROSA26 safe harbor region in 0.32% of cells. These findings show that the methodology used in this study can be used for targeting genomic regions. An application for this finding could be in cancer cells to insert sequences into specific target regions that are intended to be destroyed, or to place promoter cargos behind the tumor suppressor genes to activate them.
(© 2021 Federation of American Societies for Experimental Biology.)
Databáze: MEDLINE
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