title: A real-time PCR method to rapidly titer adenovirus stocks.
abstract: A critical step in working with adenovirus (Ad) and its vectors is the accurate, reproducible, sensitive, and rapid measurement of the amount of virus present in a stock. Titration methods fall into one of two categories: determination of either the infectious or the particle (infectious plus noninfectious) titer. Determining the infectious titer of a virus stock by plaque assay has important limitations, including cell line-, researcher-, and laboratory-dependent variation in titer, and the length of time required to perform the assay (2-4 wk). A major drawback of particle titration methods is the lack of consistent correlation between the resultant titer and the infectious titer. To overcome these problems, a rapid, sensitive, and reproducible real-time polymerase chain reaction (PCR) assay was developed that detects encapsidated full-length genomes. Importantly, there is a linear correlation between the titer determined by the realtime PCR assay and the infectious titer determined by a plaque assay. This chapter provides step-by-step guidance for preparing viral DNA, conducting the real-time PCR assay, and using the resultant data to calculate a viral titer.
authors.affiliation: Department of Molecular Microbiology and Immunology, Saint Louis University School of Medicine, St. Louis, MO, USA.
authors.forename: Maria A
authors.initials: MA
authors.lastname: Thomas
authors.forename: Drew L
authors.initials: DL
authors.lastname: Lichtenstein
authors.forename: Peter
authors.initials: P
authors.lastname: Krajcsi
authors.forename: William S M
authors.initials: WS
authors.lastname: Wold
mesh_terms: D000256:Adenoviridae / Q000145:classification / Q000235:genetics*; D002460:Cell Line; D004279:DNA, Viral / Q000302:isolation & purification; D003851:Deoxyribonucleases; D016133:Polymerase Chain Reaction / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D010948:Viral Plaque Assay
chemical_list: D004279:DNA, Viral; D003851:Deoxyribonucleases