4.5 Article

An Optimized CRISPR/Cas9 Adenovirus Vector (AdZ-CRISPR) for High-Throughput Cloning of sgRNA, Using Enhanced sgRNA and Cas9 Variants

Journal

HUMAN GENE THERAPY
Volume 33, Issue 17-18, Pages 990-1001

Publisher

MARY ANN LIEBERT, INC
DOI: 10.1089/hum.2021.120

Keywords

CRISPR; adenovirus vector; recombineering; sgRNA; Cas9; SniperCas9

Funding

  1. MRC [MR/S00971X/1]
  2. Wellcome Trust [204870/Z/16/Z]
  3. Wellcome Trust [204870/Z/16/Z] Funding Source: Wellcome Trust
  4. MRC [MR/S00971X/1] Funding Source: UKRI

Ask authors/readers for more resources

This study adapts the AdZ vector system for high-throughput cloning of CRISPR/Cas9 editing sequences. By optimizing the vectors and modifying the Cas9 and sgRNA sequences, efficient gene knockout and editing can be achieved.
Recombinant adenovirus vectors enable highly efficient gene delivery in vitro and in vivo. As a result, they are widely used in gene therapy, vaccination, and anticancer applications. We have previously developed the AdZ vector system, which uses recombineering to permit high-throughput cloning of transgenes into Adenovirus vectors, simplifies alteration of the vector backbone, and enables rapid recovery of infectious virus, even if a transgene is incompatible with vector replication. In this study, we adapt this vector system to enable high-throughput cloning of sequences for CRISPR/Cas9 editing. Vectors were optimized to ensure efficient cloning, and high editing efficiency using spCas9 and single guide RNA (sgRNA) sequences in a single vector. Using a multiplicity of infection of 50, knockout efficiencies of up to 80% could be achieved with a single sgRNA. Vectors were further enhanced by altering the spCas9 sequence to match that of SniperCas9, which has reduced off-target activity, but maintains on-target efficiency, and by applying modifications to the sgRNA sequence that significantly enhance editing efficiency. Thus, the AdZ-CRISPR vectors offer highly efficient knockout, even in hard to transfect cells, and enables large-scale CRISPR/Cas9 projects to be undertaken easily and quickly.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.5
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available