Active immunotherapy: oncolytic virus therapy using HSV-1.
Conditionally replicating herpes simplex viruses Type 1 (HSV-1) are promising therapeutic agents for glioma. They can replicate in situ, spread and exhibit oncolytic activity via a direct cytocidal effect. In addition, specific antitumor immunity is effectively induced in the course of oncolytic activities. G47Δ is a genetically engineered HSV-1 with triple mutations that realized augmented viral replication in tumor cells, strong induction of antitumor immunity and enhanced safety in normal tissues. A clinical trial of G47Δ in patients with recurrent glioblastoma has started in 2009. One of the advantages of HSV-1 is its capacity to incorporate large and/or multiple transgenes within the viral genome. In preclinical studies, "arming" of an oncolytic HSV-1 with transgenes encoding immunomodulatory molecules, such as interleukin 12, has been shown to greatly augment the efficacy of oncolytic HSV-1 therapy. Oncolytic virus therapy using HSV-1 may be a useful treatment for glioma that can also function as an efficient in situ tumor vaccination.
Department of Neurosurgery, The University of Tokyo, Tokyo, Japan. toudou-nsu@umin.ac.jp
Tomoki
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Todo
D001932:Brain Neoplasms / Q000276:immunology / Q000628:therapy* / Q000821:virology; D005818:Genetic Engineering; D005910:Glioma / Q000276:immunology / Q000628:therapy* / Q000821:virology; D018259:Herpesvirus 1, Human / Q000235:genetics / Q000276:immunology*; D006801:Humans; D016233:Immunotherapy, Active / Q000379:methods*; D009154:Mutation; D050130:Oncolytic Virotherapy / Q000379:methods*; D014779:Virus Replication / Q000187:drug effects / Q000276:immunology