FDA Approves Genentech's Kadcyla for Adjuvant Treatment of People With HER2-Positive Early Breast Cancer With Residual Invasive Disease After Neoadjuvant Treatment

-- Approval based on data showing Kadcyla cut the risk of disease recurring by half compared to Herceptin in the adjuvant setting for specific patients with HER2-positive early breast cancer --

-- Application approved under FDA’s Real-Time Oncology Review pilot program –

SOUTH SAN FRANCISCO, CA, USA I May 03, 2019 I Genentech, a member of the Roche Group (SIX: RO, ROG; OTCQX: RHHBY), today announced that the U.S. Food and Drug Administration (FDA) has approved Kadcyla® (ado-trastuzumab emtansine) for adjuvant (after surgery) treatment of people with HER2-positive early breast cancer (EBC) who have residual invasive disease after neoadjuvant (before surgery) taxane and Herceptin® (trastuzumab)-based treatment.

“This approval is a significant treatment advance for HER2-positive early breast cancer. By working closely with the FDA and participating in the Real-Time Oncology Review pilot program, we are able to make Kadcyla available for people with residual invasive disease after neoadjuvant therapy much sooner than anticipated,” said Sandra Horning, M.D., chief medical officer and head of Global Product Development. “With every step forward in reducing the risk of disease recurrence, we come closer to the goal of helping each person with early breast cancer have the greatest opportunity for cure.”

The goal in treating EBC is to provide people with the best chance for a cure, which may involve treatment before and after surgery as part of a comprehensive treatment approach. While we come closer to this goal with each advance, many people still have a disease recurrence in the long term. Neoadjuvant treatment is given before surgery with the goal of shrinking tumors and helping to improve surgical outcomes. Adjuvant treatment is given after surgery and aims to eliminate any remaining cancer cells in the body to help reduce the risk of the cancer returning.

The FDA rapidly reviewed and approved the application under the FDA’s Real-Time Oncology Review (RTOR) and Assessment Aid pilot programs, leading to an approval 12 weeks after completing the submission. Kadcyla is the first Genentech medicine approved under the RTOR pilot program, which is exploring 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.

This approval 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% (HR=0.50, 95% CI 0.39-0.64, p<0.0001) compared to Herceptin as an adjuvant treatment in people with HER2-positive EBC who have residual invasive disease after neoadjuvant taxane and Herceptin-based treatment. At three years, 88.3% of people treated with Kadcyla did not have their breast cancer return compared to 77.0% treated with Herceptin, an absolute improvement of 11.3%. People who have residual disease after neoadjuvant treatment have a worse prognosis than those with no detectable disease.

The most common Grade 3 or higher side effects (>2%) with Kadcyla in the KATHERINE study were decreased platelet count and high blood pressure. The most common side effects (>25%) with Kadcyla were fatigue; nausea; increased blood levels of liver enzymes; musculoskeletal pain; bleeding; decreased platelet count; headache; numbness, tingling or pain in the hands or feet; and joint pain.

For those who qualify, Genentech offers patient assistance programs for people prescribed Kadcyla by their doctor. Please contact Genentech Access Solutions at (866) 422-2377 or visit http://www.Genentech-Access.com/Kadcyla for more information.

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 iDFS including second primary non-breast cancer, disease-free survival and overall survival.

KATHERINE Study Results
 

Kadcyla

n=743

Herceptin

n=743

Median follow-up 40 months
Invasive disease-free survival (iDFS)
Risk reduction HR=0.50, 95% CI 0.39-0.64, p<0.0001
3-year iDFS 88.3% 77.0%
11.3% absolute improvement
Adverse reactions (ARs)
Grade ≥3 AR 26% 15%
Most common Grade  3 ARs (>2%)
Thrombocytopenia  (decreased platelet count) 6% 0.3%
Hypertension  (high blood pressure) 2.0% 1.2%

About HER2-positive breast cancer 

Breast cancer is one of the most common cancers 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% 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 cancer 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 early and metastatic breast cancer. In the U.S., Genentech licenses technology for Kadcyla under an agreement with ImmunoGen, Inc.

Kadcyla Indication Statements

Kadcyla is approved as an adjuvant (after surgery) treatment for HER2-positive early breast cancer when the patient has taken neoadjuvant (before surgery) treatment including a taxane and trastuzumab (Herceptin) and there is cancer remaining in the tissue removed during surgery. Patients are selected for therapy based on an FDA-approved test for Kadcyla.

Kadcyla is approved to treat HER2-positive breast cancer that has spread to other parts of the body (metastatic breast cancer) after prior treatment with trastuzumab (Herceptin) and a taxane. Prior treatment could have been for the initial treatment of breast cancer or for the treatment of cancer that had spread to other parts of the body. Patients are selected for therapy based on an FDA-approved test for Kadcyla.

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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