Belgian FAMHP approves Oncolytics' Phase 3 combination trial of REOLYSIN in head and neck cancers

Jun 1 2010

Oncolytics Biotech Inc. ("Oncolytics") (TSX:ONC, NASDAQ:ONCY) today announced that it has received approval from the Belgian Federal Agency for Medicines and Health Products (FAMHP) to conduct its Phase 3 trial examining REOLYSIN in combination with paclitaxel and carboplatin in patients with platinum-refractory head and neck cancers. This is the same trial that was agreed to by U.S. Food and Drug Administration (FDA) under the Special Protocol Assessment (SPA) process and the U.K. Medicines and Healthcare products Regulatory Agency (MHRA).

"Obtaining approval to conduct this trial in Belgium will allow us to expand European enrollment in the study and to access leading head and neck specialists," said Dr. Brad Thompson, President and CEO of Oncolytics. "We expect to add Belgian centres over the next quarter as they become available for inclusion in the study."

As previously disclosed, the randomized, two-arm, double-blind, multicentre, two-stage, adaptive Phase 3 trial will assess the intravenous administration of REOLYSIN with the chemotherapy combination of paclitaxel and carboplatin versus the chemotherapy alone in patients with metastatic or recurrent squamous cell carcinoma of the head and neck, or squamous cell cancer of the nasopharynx, who have progressed on or after prior platinum-based chemotherapy. All patients will receive treatment every three weeks (21 day cycles) with paclitaxel and carboplatin and will also receive, on a blinded basis, either intravenous placebo or intravenous REOLYSIN. All dosing takes place in the first five days of each cycle with all patients receiving standard intravenous doses of paclitaxel and carboplatin on day one only, and on days one through five, either intravenous placebo or intravenous REOLYSIN at a dose of 3x10(10) TCID(50). Patients may continue to receive the trial combination therapy for up to eight, 21-day cycles and, thereafter, blinded placebo or blinded REOLYSIN until the patient has progressive disease or meets other criteria for removal from the trial. Oncolytics intends to conduct the first stage of the trial at approximately 25 centres in the U.S., U.K., and Belgium.

The primary endpoint for the trial is overall survival (OS); secondary endpoints include progression free survival (PFS), objective response rate (complete response (CR) + partial response (PR)) and duration of response, and safety and tolerability of REOLYSIN when administered in combination with paclitaxel and carboplatin. The first stage of the trial is designed to enroll 80 patients. The second stage is adaptive, and is designed to enroll between 100 and 400 patients with the most probable statistical enrolment being 195 patients in this stage. This adaptive trial design allows frequent data evaluation to determine if the probability of reaching a statistically significant endpoint has been achieved.

The decision to pursue a Phase 3 trial in head and neck cancers was predicated on positive results seen in the Company's U.K. Phase 1 and Phase 2 combination REOLYSIN and paclitaxel/carboplatin clinical trials, as well as significant preclinical work demonstrating synergy in combination with taxane or platinum-based drugs. Updated results from the U.K. Phase 1/2 trial reported in November 2009 demonstrated an overall response rate (PR and CR) of 42% and a total clinical benefit rate (PR + CR + stable disease) of 74%. The Company is currently conducting a confirmatory Phase 2 trial in the U.S. in patients with advanced head and neck cancers.