Investor Update

Basel, 07 November 2012

FDA grants Roche's trastuzumab emtansine (T-DM1) Priority Review for HER2-positive metastatic breast cancer

Roche (SIX: RO, ROG; OTCQX: RHHBY) today announced that the U.S. Food and Drug Administration (FDA) has accepted the company’s Biologics License Application (BLA) for trastuzumab emtansine (T-DM1) and granted Priority Review.  Trastuzumab emtansine’s proposed indication is for the treatment of people with HER2-positive, unresectable locally advanced or metastatic breast cancer (mBC) who have received prior treatment with Herceptin (trastuzumab) and a taxane chemotherapy.  The FDA confirmed the action date is February 26, 2013.

“We are very pleased that the FDA has granted trastuzumab emtansine a Priority Review, as we know people with HER2-positive metastatic breast cancer still need new treatment options,” said Hal Barron, M.D., chief medical officer and head, Global Product Development.

Roche’s Marketing Authorisation Application for trastuzumab emtansine for people with HER2-positive mBC has also been accepted for review by the European Medicines Agency (EMA).

Genentech licenses technology for trastuzumab emtansine under an agreement with ImmunoGen, Inc.

Building on the results of trastuzumab emtansine studies to date, there are approximately 25 antibody-drug conjugates in Roche’s pipeline.

About Trastuzumab Emtansine (T-DM1)

Trastuzumab emtansine is an antibody-drug conjugate (ADC) being studied in HER2-positive cancers.  It is comprised of the antibody trastuzumab and the chemotherapy DM1 attached together using a stable linker.  Trastuzumab emtansine is designed to target and inhibit HER2 signalling and deliver the chemotherapy DM1 directly inside HER2-positive cancer cells.  Trastuzumab emtansine binds to HER2-positive cancer cells and is thought to block out-of-control signals that make the cancer grow while also calling on the body’s immune system to attack the cancer cells.  Once trastuzumab emtansine is taken up by those cancer cells, it is designed to destroy them by releasing the DM1.

About Breast Cancer

Breast cancer is the most common cancer among women worldwide1. Each year about 1.4 million new cases of breast cancer are diagnosed worldwide, and over 450,000 women will die of the disease annually1. In HER2-positive breast cancer, increased quantities of the human epidermal growth factor receptor 2 (HER2) are present on the surface of the tumour cells. This is known as “HER2 positivity” and affects approximately 15-20 percent of women with breast cancer2. HER2-positive cancer is a particularly aggressive form of breast cancer3.

About Roche

Headquartered in Basel, Switzerland, Roche is a leader in research-focused healthcare with combined strengths in pharmaceuticals and diagnostics. Roche is the world’s largest biotech company with truly differentiated medicines in oncology, virology, inflammation, metabolism and CNS. Roche is also the world leader in in-vitro diagnostics, tissue-based cancer diagnostics and a pioneer in diabetes management. Roche’s personalized healthcare strategy aims at providing medicines and diagnostic tools that enable tangible improvements in the health, quality of life and survival of patients. In 2011, Roche had over 80,000 employees worldwide and invested over 8 billion Swiss francs in R&D. The Group posted sales of 42.5 billion Swiss francs. Genentech, United States, is a wholly owned member of the Roche Group. Roche has a majority stake in Chugai Pharmaceutical, Japan. For more information: www.roche.com.

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References:
1) Ferlay J, Shin HR, Bray F, Forman D, Mathers C and Parkin DM GLOBOCAN 2008, Cancer Incidence and Mortality Worldwide: IARC Cancer Base No. 10 [Internet]. Lyon, France: International Agency for Research on Cancer; 2010. Available from: http://globocan.iarc.fr.
2) Wolff A.C et al. American Society of Clinical Oncology/College of American Pathologists Guideline Recommendations for Human Epidermal Growth Factor Receptor 2 Testing in Breast Cancer. Arch Pathol Lab Med 2007: 131.
3)Slamon D et al. Adjuvant Trastuzumab in HER2-Positive Breast Cancer. N Engl J Med 2011; 365:1273-83.