Oncothyreon announces initiation of Phase 3 trial of Stimuvax in breast cancer

June 24, 2009 by srrpenna

Oncothyreon Inc. announced that Merck KGaA has initiated a global Phase 3 trial of Stimuvax(R) (BLP25 liposome vaccine, L-BLP25) in patients with hormone receptor-positive, locally advanced, recurrent or metastatic breast cancer. The Phase 3 trial, named STRIDE (STimulating immune Response In aDvanced brEast cancer), is anticipated to enroll more than 900 patients at approximately 180 sites in over 30 countries - including North America, Europe, Asia and Australia. Patients with estrogen receptor-positive and/or progesterone receptor-positive, non-resectable locally advanced, recurrent or metastatic breast cancer receiving hormonal therapy will be randomized to receive either Stimuvax or a placebo in a 2:1 ratio. The primary endpoint of STRIDE is progression-free survival. Overall survival, quality of life, tumor response and safety will also be assessed in this study.

"Advanced-stage breast cancer remains a devastating and challenging disease and we urgently need new treatment options," said Dr. Larry Shulman, Chief Medical Officer and Senior Vice President for Medical Affairs, Dana-Farber Cancer Institute, Boston, Massachusetts, and Principal Investigator of STRIDE. "If the results from the Phase 3 STRIDE study prove positive, this could make a difference for patients with hormone receptor positive metastatic breast cancer."

About Stimuvax

Stimuvax is an investigational therapeutic cancer vaccine designed to induce an immune response to cancer cells that express MUC1, a glycoprotein antigen widely expressed on common cancers. MUC1 is over-expressed on many cancers such as lung cancer, breast cancer, prostate cancer and colorectal cancer. Stimuvax is thought to work by stimulating the body's immune system to identify and destroy cancer cells expressing MUC1.

In addition to STRIDE, Merck KGaA currently is conducting a global Phase 3 trial of Stimuvax known as START (Stimulating Targeted Antigenic Responses To NSCLC). START is a randomized, double-blind, placebo-controlled study that will evaluate patients with documented unresectable stage III NSCLC who have had a response or stable disease after at least two cycles of platinum-based chemo-radiotherapy. START is expected to enroll more than 1,300 patients in over 30 countries. For more information on the START trial log on to www.nsclcstudy.com or www.clinicaltrials.gov.

About Oncothyreon

Oncothyreon is a biotechnology company specializing in the development of innovative therapeutic products for the treatment of cancer. Oncothyreon's goal is to develop and commercialize novel synthetic vaccines and targeted small molecules that have the potential to improve the lives and outcomes of cancer patients. For more information, visit www.oncothyreon.com.

SOURCE: Oncothyreon Inc.

Investor and Media Relations Contact: Julie Rathbun, Rathbun Communications, (206)
769-9219, ir@oncothyreon.com

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