Bayer Pharmaceuticals Corporation and Onyx Pharmaceuticals, Inc have announced that the European Commission has granted marketing authorization to Nexavar (sorafenib) tablets for the treatment of patients with advanced renal cell carcinoma who have failed prior interferon- alpha or interleukin-2 based therapy or are considered unsuitable for such therapy.
Bayer will commercialize Nexavar in Europe.
"Today's approval of Nexavar, which has shown to double progression-free survival, is a significant advance in the fight against kidney cancer," said Dr. Gunnar Riemann, Head of Bayer HealthCare's Pharmaceuticals Division. "For more than a decade, Europeans with kidney cancer have not had a new approved treatment. We are pleased to play a part in addressing this unmet medical need."
The decision by the European Commission to grant marketing authorization to Nexavar followed a positive opinion issued by the European Medicines Agency's Committee on Medicinal Products for Human Use (CHMP) in April this year. Nexavar was approved by the U.S. Food and Drug Administration (FDA) in December 2005 and has since been approved in Switzerland, Mexico, Chile, Brazil, Korea, and Argentina. Regulatory filings have been completed in several countries, including Australia, Canada, Turkey, and Japan.
"Nexavar delays the progression of kidney cancer and is generally well tolerated," said Dr. Escudier, head of Immunotherapy and Innovative Therapy Unit at the Gustave-Roussy Institute in Paris, France, and co-principal investigator of the pivotal study that led to the approval of Nexavar by the European Commission.
Every year, more than 200,000 people around the world are diagnosed with kidney cancer and more than 102,000 die from the disease. In Europe, there are more than 46,000 new cases of kidney cancer annually. At the time of diagnosis, the cancer has already metastasized (spread to distant body locations) in about one-third of people with kidney cancer.
Nexavar EMEA approval was based on Phase III data from the largest randomized, placebo-controlled trial ever conducted in patients with advanced renal cell carcinoma. In the Phase III study, Nexavar doubled progression- free survival (PFS) in previously treated patients when compared to placebo. Progression-free survival measures the time that a patient lives without evident tumor growth. In this study, PFS was doubled to a median value of six months in patients receiving Nexavar as compared to three months for patients receiving placebo (p-value < 0.000001). All subgroups examined, including patients who had not received conventional treatment with biologics, such as interleukin-2 or interferon-alpha, appeared to benefit as well.
In April 2005, Bayer and Onyx discussed the clinical and statistical significance of this analysis with the principal investigators, an independent data monitoring committee (DMC), and with regulatory authorities and decided that it would not be ethical to continue the study with a placebo-control arm. The companies immediately recommended that all patients in the trial be offered access to Nexavar. In parallel, an interim analysis of overall survival (OS) was conducted. The median overall survival for placebo was 14.7 months, while the median OS survival for Nexavar had not been reached (p=0.018, hazard ratio 0.72).