Rescue of recombinant adenoviruses by CRISPR/Cas-mediated in vivo terminal resolution

Riedl, A., Fischer, J., Burgert, H-G. and Ruzsics, Z. 2022. Rescue of recombinant adenoviruses by CRISPR/Cas-mediated in vivo terminal resolution. Frontiers in Microbiology 13 , 854690. 10.3389/fmicb.2022.854690

PDF - Published Version Available under License Creative Commons Attribution. Download (1MB)

Abstract

Recombinant adenovirus (rAd) vectors represent one of the most frequently used vehicles for gene transfer applications in vitro and in vivo. rAd genomes are constructed in Escherichia coli where their genomes can be maintained, propagated, and modified in form of circular plasmids or bacterial artificial chromosomes. Although the rescue of rAds from their circular plasmid or bacmid forms is well established, it works with relatively low primary efficiency, preventing this technology for library applications. To overcome this barrier, we tested a novel strategy for the reconstitution of rAds that utilizes the CRISPR/Cas-machinery to cleave the circular rAd genomes in close proximity to their inverted terminal repeats (ITRs) within the producer cells upon transfection. This CRISPR/Cas-mediated in vivo terminal resolution allowed efficient rescue of vectors derived from different human adenovirus (HAdV) species. By this means, it was not only possible to increase the efficiency of virus rescue by about 50-fold, but the presented methodology appeared also remarkably simpler and faster than traditional rAd reconstitution methods.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Medicine
Publisher:	Frontiers Media
ISSN:	1664-302X
Date of First Compliant Deposit:	10 March 2026
Date of Acceptance:	3 February 2022
Last Modified:	10 Mar 2026 11:45
URI:	https://orca.cardiff.ac.uk/id/eprint/185643

Actions (repository staff only)

Edit Item