A Multicenter Study of Active Specific Immunotherapy With OncoVax® in Patients With Stage II Colon Cancer

OncoVAX is an active specific immunotherapeutic (ASI) stimulating a patient's immune

response to autologous (patient-specific) tumor cells. It is comprised of sterile, live but

non-dividing tumor cells obtained following standard-of-care surgical tumor resection for

Stage II colon cancer. Within 35 days following surgery, patients are immunized with

OncoVAX to prevent disease recurrence, which is incurable and occurs in up to 35% of

patients. Patients are given three injections once per week for three weeks, followed

by a booster shot after six months. A previously completed Phase III trial

published in The Lancet showed that OncoVAX cut the risk of recurrence by 61% in

patients with Stage II colon cancer. The primary endpoint is Disease-Free Survival:

defined as the time from curative surgery to the objective test confirming tumor

recurrence or death due to any cause. The secondary endpoints are Overall Survival

and Recurrence-Free-Interval. An interim analysis will be performed at a significance

level of 0.005 once 2/3 of anticipated events have occurred, resulting in a significance

level of 0.0483 at the end of the study. A total of 550 patients is planned, randomized

1:1 to receive OncoVAX® plus surgery (n=275) or surgery alone (n=275).