Genentech Submits Supplemental Biologics License Application to FDA for Kadcyla for Adjuvant Treatment of People With HER2-Positive Early Breast Cancer With Residual Disease After Neoadjuvant Treatment

– Application is being reviewed under FDA's Real-Time Oncology Review and Assessment Aid pilot programs –

– Kadcyla was granted Breakthrough Therapy Designation for this application –

SOUTH SAN FRANCISCO, CA, USA I February 5, 2019 I Genentech, a member of the Roche Group (SIX: RO, ROG; OTCQX: RHHBY), today announced completing the submission of a supplemental Biologics License Application to the U.S. Food and Drug Administration (FDA) for Kadcyla® (ado-trastuzumab emtansine) for adjuvant (after surgery) treatment of people with HER2-positive early breast cancer (EBC) with residual disease after neoadjuvant (before surgery) treatment. The FDA is reviewing the application under the Real-Time Oncology Review and Assessment Aid pilot programs, which aim to explore a more efficient review process to ensure safe and effective treatments are available to patients as early as possible. For this indication, Kadcyla was also granted Breakthrough Therapy Designation, which is designed to expedite the development and review of medicines intended to treat serious or life-threatening diseases.

“Kadcyla was granted Breakthrough Therapy Designation and is also the first Genentech medicine to be reviewed under the FDA’s Real-Time Oncology Review pilot program; both FDA initiatives aim to expedite reviews and bring medicines to patients sooner,” said Sandra Horning, M.D., chief medical officer and head of Global Product Development. “We are working closely with the FDA to bring Kadcyla to people with HER2-positive early breast cancer who have residual disease after neoadjuvant therapy as early as possible.”

This application is based on results of the Phase III KATHERINE study showing Kadcyla significantly reduced the risk of invasive breast cancer recurrence or death from any cause (invasive disease-free survival; iDFS) by 50 percent (HR=0.50, 95% CI 0.39-0.64, p<0.0001) compared to Herceptin® (trastuzumab) as an adjuvant treatment in people with HER2-positive EBC who have residual disease present following neoadjuvant treatment. People who have residual disease after neoadjuvant treatment have a worse prognosis than those with no detectable disease. At three years, 88.3 percent of people treated with Kadcyla did not have their breast cancer return compared to 77.0 percent treated with Herceptin, an absolute improvement of 11.3 percent.

The most common Grade 3-4 side effects (≥1 percent) with Kadcyla in the KATHERINE study were decreased platelet count; high blood pressure; radiation-induced skin injury; numbness, tingling or pain in the hands or feet; decreased neutrophil count; low blood potassium level; fatigue and decrease in red blood cells.

About the KATHERINE study

KATHERINE is an international, multi-center, two-arm, randomized, open-label, Phase III study evaluating the efficacy and safety of Kadcyla versus Herceptin as an adjuvant therapy in people with HER2-positive EBC who have pathological invasive residual disease in the breast and/or axillary lymph nodes following neoadjuvant therapy that included Herceptin and taxane-based chemotherapy. The primary endpoint of the study is iDFS, which in this study is defined as the time from randomization free from invasive breast cancer recurrence or death from any cause. Secondary endpoints include disease-free survival and overall survival.

About HER2-positive breast cancer

Breast cancer is the most common cancer among women worldwide. According to the American Cancer Society, approximately 271,000 people in the United States will be diagnosed with breast cancer, and more than 42,000 will die from the disease in 2019. Breast cancer is not one, but many diseases based on the biology of each tumor. In HER2-positive breast cancer, there is excess HER2 protein on the surface of tumor cells. Approximately 15-20 percent of breast cancers are HER2-positive based on the result of a diagnostic test.

About Kadcyla

Kadcyla is an antibody-drug conjugate (ADC) engineered to deliver potent chemotherapy directly to HER2-positive cells. It is designed to limit damage to healthy tissues, although it can still affect them. Kadcyla can cause serious side effects. It combines two anti-cancer agents using a stable linker: the HER2-targeting trastuzumab (the active ingredient in Herceptin) and the chemotherapy agent DM1. Kadcyla is the only ADC approved for the treatment of HER2-positive metastatic breast cancer. In the U.S., Genentech licenses technology for Kadcyla under an agreement with ImmunoGen, Inc.

Kadcyla Indication Statement

Kadcyla, as a single agent, is indicated for the treatment of patients with HER2-positive, metastatic breast cancer who previously received trastuzumab and a taxane, separately or in combination. Patients should have either:

  • Received prior therapy for metastatic disease, or
  • Developed disease recurrence during or within six months of completing adjuvant therapy.

About Genentech in breast cancer

Genentech has been advancing breast cancer research for more than 30 years with the goal of helping as many people with the disease as possible. Our medicines, along with companion diagnostic tests, have substantially improved outcomes for HER2-positive breast cancer. As our understanding of breast cancer biology rapidly improves, we are working to identify new biomarkers and approaches to treatment for other subtypes of the disease, including triple-negative and hormone receptor-positive.

About Genentech

Founded more than 40 years ago, Genentech is a leading biotechnology company that discovers, develops, manufactures and commercializes medicines to treat patients with serious and life-threatening medical conditions. The company, a member of the Roche Group, has headquarters in South San Francisco, California. For additional information about the company, please visit http://www.gene.com.

SOURCE: Genentech

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