Polymer-Enhanced Adenoviral Transduction of CAR-Negative Bladder Cancer Cells
The application of adenoviral gene therapy for cancer is limited by immune clearance of the virus as well as poor transduction efficiency, since the protein used for viral entry (CAR) serves physiological functions in adhesion and is frequently decreased among cancer cells. Cationic polymers have been used to enhance adenoviral gene delivery, but novel polymers with low toxicity are needed to realize this approach. We recently identified polymers that were characterized by high transfection efficiency of plasmid DNA and a low toxicity profile. In this study we evaluated the novel cationic polymer EGDE-3,3′ for its potential to increase adenoviral transduction of the CAR-negative bladder cancer cell line TCCSUP. The amount of adenovirus required to transduce 50-60% of the cells was reduced 100-fold when Ad.GFP was preincubated with the EGDE-3,3′ polymer. Polyethyleneimine (pEI), a positively charged polymer currently used as a standard for enhancing adenoviral transduction, also increased infectivity, but transgene expression was consistently higher with EGDE-3,3′. In addition, EGDE-3,3′-supplemented transduction of an adenovirus expressing an apoptosis inducing transgene, Ad.GFP-TRAIL, significantly enhanced the amount of cell death. Thus, our results indicate that novel biocompatible polymers may be useful in improving the delivery of adenoviral gene therapy.
L. M. Kasman et al., "Polymer-Enhanced Adenoviral Transduction of CAR-Negative Bladder Cancer Cells," Molecular Pharmaceutics, vol. 6, no. 5, pp. 1612 - 1619, American Chemical Society (ACS), Oct 2009.
The definitive version is available at https://doi.org/10.1021/mp9000958
Chemical and Biochemical Engineering
Keywords and Phrases
Adenovirus; Bladder cancer; Cancer; Gene therapy; Polymer
International Standard Serial Number (ISSN)
Article - Journal
© 2009 American Chemical Society (ACS), All rights reserved.
01 Oct 2009