RRC ID 2059
Author Mizuguchi H, Hayakawa T.
Title Enhanced antitumor effect and reduced vector dissemination with fiber-modified adenovirus vectors expressing herpes simplex virus thymidine kinase.
Journal Cancer Gene Ther.
Abstract There are at least two hurdles confronting the use of the adenovirus (Ad)-mediated herpes simplex virus thymidine kinase (HSVtk)/ganciclovir (GCV) system for the treatment of cancer. One is inefficient Ad vector-mediated gene transfer into tumor cells lacking the primary receptor, i.e., the coxsackievirus and adenovirus receptor (CAR). The other is hepatotoxicity due to unwanted vector spread into the liver, even when Ad vectors are injected intratumorally. Herein, we present an attractive strategy for overcoming such limitations based on use of a fiber-modified Ad vector containing an RGD peptide motif in the fiber knob. HSVtk-expressing Ad vectors containing mutant fiber (AdRGD-tk) or wild-type fiber (Ad-tk) were injected intratumorally into CAR-negative B16 melanoma cells inoculated into mice, after which GCV was injected intraperitoneally for 10 days. AdRGD-tk showed approximately 25 times more antitumor activity than Ad-tk. Histopathological studies suggested that liver damage in mice injected with AdRGD-tk was significantly lower than that in mice injected with Ad-tk. Intratumoral administration of luciferase-expressing Ad vectors containing the mutant fiber (AdRGD-L2) resulted in nearly 40 times more luciferase production in the tumor, but 8 times less production in the liver than the conventional Ad vectors (Ad-L2). These results indicate that combination of fiber-modified vectors and a HSVtk/GCV system is a potentially useful and safe approach for the treatment of tumors lacking CAR expression, and that fiber-modified vectors could be of great utility for gene therapy and gene transfer experiments.
Volume 9(3)
Pages 236-42
Published 2002-3
DOI 10.1038/sj.cgt.7700440
PMID 11896439
MeSH Adenoviridae / genetics* Animals Antiviral Agents / pharmacology Capsid / genetics* Capsid Proteins* Cell Survival / drug effects* Female Ganciclovir / pharmacology Genetic Therapy / methods* Genetic Vectors Humans Integrins / metabolism Liver / physiopathology* Luciferases / metabolism Melanoma, Experimental / physiopathology Melanoma, Experimental / therapy* Mice Mice, Inbred C57BL Mice, Nude Neoplasm Transplantation Oligopeptides / metabolism Receptors, Vitronectin* Simplexvirus / enzymology* Thymidine Kinase / genetics*
IF 4.044
Times Cited 39
DNA material pCM-TK (RDB01692)