title: [Novel qPCR strategy for quantification of recombinant adeno-associated virus serotype 2 vector genome-titer].
abstract: Adeno-associated virus (AAV) has many advantages for gene therapy over other vector systems. However, after the production of recombinant AAV (Raav) vectors, the biological titration of rAAV stocks is still cumbersome. Different investigators used laboratory-specific methods or internal reference standards that may limit preclinical and clinical applications. The inverted terminal repeats (ITR) sequences are the only cis-regulated viral elements required for rAAV packaging and remain within viral vector genomes. ITR is the excellent target sequences for qPCR quantification of rAAV titer. In this study, we developed a novel qPCR strategy to quantify rAAVs' vector genome titer via targeting the ITR2 or ITR2-CMV element. In conclusion, the method is fast and accurate for the titration of rAAV2-derived vector genomes. It will promote the standardization of rAAV titration in the future.
authors.affiliation: Suzhou Municipal Key Laboratory of Molecular Diagnostics and Therapeutics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou 215163, Jiangsu, China.
authors.forename: Qinglin
authors.initials: Q
authors.lastname: Meng
authors.forename: Binbin
authors.initials: B
authors.lastname: Zhang
authors.forename: Chun
authors.initials: C
authors.lastname: Zhang
mesh_terms: D000229:Dependovirus / Q000145:classification / Q000235:genetics*; D005822:Genetic Vectors / Q000235:genetics; D016679:Genome, Viral / Q000235:genetics*; D016133:Polymerase Chain Reaction / Q000379:methods*; D011995:Recombination, Genetic; D012703:Serotyping; D020079:Terminal Repeat Sequences / Q000235:genetics*; D014161:Transduction, Genetic