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Mol Ther. 2014 May;22(5):1056-62. doi: 10.1038/mt.2014.21. Epub 2014 Feb 20.

Phase 1 clinical trial of intratumoral reovirus infusion for the treatment of recurrent malignant gliomas in adults.

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Department of Surgery, Division of Neurosurgery, University of Alabama, Birmingham, Birmingham, Alabama, USA.
Department of Neurosurgery, Brigham and Women's Hospital, Boston, Massachusetts, USA.
Department of Neurosurgery, Cedars-Sinai, West Hollywood, California, USA.
Oncolytics Biotech, Calgary, Alberta, Canada.


Reovirus, an oncolytic RNA virus exhibiting antiglioma activity, was shown in a previous single institution phase 1 study found that the inoculation of the virus to be well tolerated in patients with recurrent malignant glioma (MG). The goals of multicenter study reported herein were to determine the dose-limiting toxicity, maximum tolerated dose, and target lesion response rate when reovirus was administered in a novel fashion via intratumoral infusion for 72 hours in patients with recurrent malignant glioma. Fifteen adult patients were treated in a dose escalation study ranging from 1 × 10(8) to 1 × 10(10) tissue culture infectious dose 50, tentimes the dose achieved in the previous trial. Neurological, functional examinations, and imaging studies were completed pre- and postinfusion. There was one grade 3 adverse event (convulsions) felt to be possibly related to treatment, but no grade 4 adverse events considered probably or definitely related to treatment. Dose-limiting toxicity were not identified and a maximum tolerated dose was not reached. Evidence of antiglioma activity was seen in some patients. This first report of intratumoral infusion of reovirus in patients with recurrent malignant glioma demonstrated the approach to be safe and well tolerated, warranting further studies.

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