title: A rapid and efficient method for purification of recombinant adenovirus with arginine-glycine-aspartic acid-modified fibers.
abstract: Recombinant adenoviral vectors (adenovectors) have been subject to various genetic modifications to improve their transduction efficiency and targeting capacity. Production and purification of adenovectors with modified capsid proteins can be problematic using conventional two-cycle CsCl gradient ultracentrifugation. We have developed a new method for purifying recombinant adenovectors in two steps: iodixanol discontinuous density gradient ultracentrifugation and size exclusion column chromatography. The purity and infectious activity of adenovectors isolated by the two methods were comparable. The new method yielded three to four times more adenovectors with arginine-glycine-aspartic acid (RGD)-modified fiber proteins than did the conventional CsCl method. For other fiber-modified and wild-type adenovectors, the yields of the two methods were comparable. Thus, the iodixanol-based method can be used not only to improve the production of RGD-modified adenovectors but also to purify adenovectors with or without fiber modifications. Moreover, the whole procedure can be completed in 3h. Therefore, this method is rapid and efficient for production of recombination adenovectors, especially those with RGD-modified fibers.
authors.affiliation: Department of Thoracic and Cardiovascular Surgery, University of Texas M. D. Anderson Cancer Center, Houston, TX 77030, USA.
authors.forename: Henry H
authors.initials: HH
authors.lastname: Peng
authors.forename: Shuhong
authors.initials: S
authors.lastname: Wu
authors.forename: John J
authors.initials: JJ
authors.lastname: Davis
authors.forename: Li
authors.initials: L
authors.lastname: Wang
authors.forename: Jack A
authors.initials: JA
authors.lastname: Roth
authors.forename: Frank C
authors.initials: FC
authors.lastname: Marini
authors.forename: Bingliang
authors.initials: B
authors.lastname: Fang
mesh_terms: D000256:Adenoviridae / Q000235:genetics / Q000302:isolation & purification*; D002478:Cells, Cultured; D002499:Centrifugation, Density Gradient / Q000379:methods*; D002850:Chromatography, Gel / Q000379:methods*; D003287:Contrast Media / Q000737:chemistry; D005822:Genetic Vectors / Q000302:isolation & purification*; D006801:Humans; D009842:Oligopeptides / Q000737:chemistry*; D014283:Triiodobenzoic Acids / Q000737:chemistry
chemical_list: D003287:Contrast Media; D009842:Oligopeptides; D014283:Triiodobenzoic Acids; C047981:arginyl-glycyl-aspartic acid; C044834:iodixanol