Pharmacologic indicators of antitumor efficacy for oncolytic virotherapy.
2003
Central to the development of oncolytic virotherapies for cancer will be a better understanding of the parameters that influence the outcome of virotherapy to treat disseminated cancer by i.v. administration versus regional disease by local treatment. Intratumoral administration of 01/PEME, an oncolytic adenovirus, required ∼1000-fold less dose than i.v. administration to induce similar tumor growth inhibition. Despite the short ( 1000-fold increase in virus DNA copies over time. There were doses of 01/PEME for which the virus DNA concentration in the tumor increased over time but did not result in antitumor efficacy. Oncolytic virus replication at a tumor site may not be a relevant indication of antitumor efficacy. Efficient distribution to the tumor site may be one of the most critical parameters for antitumor efficacy with oncolytic virotherapy.
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