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Published on 13 February 2013

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Priority review to NDA for the investigational oncology compound radium-223 dichloride

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Bayer HealthCare announced today that the US Food and Drug Administration (FDA) has granted priority review to the New Drug Application (NDA) filed in December 2012 for the investigational oncology compound radium-223 dichloride (radium-223). The application is under review for the treatment of castration-resistant prostate cancer (CRPC) patients with bone metastases.
“We are pleased that the FDA has granted priority review status to radium-223 for the treatment of patients with CRPC that has metastasised to the bones as it supports our ongoing effort to make this compound available as early as possible for patients in need of new treatment options,” said Kemal Malik, MD, Member of the Bayer HealthCare Executive Committee and Head of Global Development.
The FDA grants priority review to medicines that offer major advances in care or that provide a treatment where no adequate therapy exists. Under the Prescription Drug User Fee Act (PDUFA), the FDA aims to complete its review within eight months from the submission of the NDA, rather than the standard 12-month review cycle.
The submission was based on data from the pivotal Phase III ALSYMPCA (ALpharadin in SYMptomatic Prostate CAncer) trial. In the study, radium-223 significantly increased overall survival by 44% (HR=0.695, p=0.00007), resulting in a 30.5% reduction in the risk of death compared to placebo. The median overall survival (OS) benefit in patients with radium-223 was 3.6 months, based on 14.9 months OS with radium-223 plus best standard of care (BSoC) versus 11.3 months with placebo plus BSoC. These updated results were presented at the 48th Annual Meeting of the American Society of Clinical Oncology (ASCO) in June 2012.
In January 2013, the US Nuclear Regulatory Commission (NRC) issued a licensing decision on the medical use of radium-223. The decision states that U.S. medical sites can procure and administer radium-223 under 10 CFR Part 35, Subpart E, which includes 10 CFR § 35.300.
About the ALSYMPCA Trial
The ALSYMPCA trial was a Phase III, randomised, double-blind, placebo-controlled international study comparing radium-223 dichloride vs. placebo in symptomatic CRPC patients with bone metastases treated with BSoC compared with placebo plus BSoC. The trial enrolled 921 patients in more than 100 centres in 19 countries. The study treatment consisted of up to six intravenous administrations of radium-223 or placebo each separated by an interval of four weeks.
The primary endpoint of the study was overall survival. Secondary endpoints included time to occurrence of skeletal related events (SRE), changes and time to progression in prostate-specific antigen (PSA) and alkaline phosphatase (ALP), safety, and impact on quality of life measures.


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