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Initial studies have demonstrated the therapeutic efficacy for cancer treatment of in vivo transfer of the herpes simplex virus thymidine kinase gene followed by ganciclovir (GCV) treatment. However, recent studies have questioned the validity of this approach. Using retroviral vector-producing cells (VPC) as a source for in vivo gene transfer, we evaluated(More)
Tumor cells transduced with retrovirus carrying the herpes simplex-1 virus thymidine kinase (HSV-tk) are capable of transforming the antiviral drug ganciclovir (GVC) into a metabolic form only toxic to dividing cells. The efficiency of this suicide gene therapy is increased by a "bystander" effect resulting not only in the death of the recipient cell, but(More)
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