Bi-allelic Homology-Directed Repair with Helper-Dependent Adenoviruses
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We describe a strategy to achieve footprintless bi-allelic homology-directed repair (HDR) using helper-dependent adenoviruses (HDAds). This approach utilizes two HDAds to deliver the donor DNA. These two HDAds are identical except for their selectable marker. One expresses the puromycin N-acetyltransferase-herpes simplex virus I thymidine kinase fusion gene (PACTk), while the other expresses the hygromycin phosphotransferase-herpes simplex virus I thymidine kinase fusion gene (HyTk). Therefore, puromycin and hygromycin double resistance can be used to select for targeted HDAd integration into both alleles. Subsequently, piggyBac-mediated excision of both PACTk and HyTk will confer resistance to gancyclovir, resulting in footprintless HDR at both alleles. However, gene-targeting frequency was not high enough to achieve simultaneous targeting at both alleles. Instead, sequential targeting, whereby the two alleles were targeted one at a time, was required in order to achieve bi-allelic HDR with HDAd.
Construction and application of adenoviral vectors.
Zhang H, Wang H, An Y, Chen Z Mol Ther Nucleic Acids. 2023; 34:102027.
PMID: 37808925 PMC: 10556817. DOI: 10.1016/j.omtn.2023.09.004.
Hunt M, Yang S, Mortensen E, Boukhris A, Buckner J, Cook P Mol Ther. 2023; 31(10):2872-2886.
PMID: 37481700 PMC: 10556186. DOI: 10.1016/j.ymthe.2023.07.016.
Novel vectors and approaches for gene therapy in liver diseases.
Maestro S, Weber N, Zabaleta N, Aldabe R, Gonzalez-Aseguinolaza G JHEP Rep. 2021; 3(4):100300.
PMID: 34159305 PMC: 8203845. DOI: 10.1016/j.jhepr.2021.100300.
High-Capacity Adenoviral Vectors: Expanding the Scope of Gene Therapy.
Ricobaraza A, Gonzalez-Aparicio M, Mora-Jimenez L, Lumbreras S, Hernandez-Alcoceba R Int J Mol Sci. 2020; 21(10).
PMID: 32455640 PMC: 7279171. DOI: 10.3390/ijms21103643.
Palmer D, Turner D, Ng P Mol Ther Methods Clin Dev. 2020; 17:441-447.
PMID: 32154329 PMC: 7058846. DOI: 10.1016/j.omtm.2020.01.014.