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Enzalutamide Significantly Reduces Morbidities Associated With Bone Metastases in Men With Metastatic Castration-Resistant Prostate Cancer


News provided by

Astellas Pharma EMEA

05 Sep, 2014, 12:47 GMT

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Astellas Pharma Europe Logo (PRNewsFoto/Astellas Pharma Europe)

CHERTSEY, England and SAN FRANCISCO, September 5, 2014 /PRNewswire/ --

- New Results From the AFFIRM Trial Published in Lancet Oncology

Enzalutamide (XTANDI™) reduces the risk of skeletal-related events compared with placebo, as well as reducing pain and increasing quality of life in men with metastatic castration-resistant prostate cancer (mCRPC) according to new results from the AFFIRM study published in Lancet Oncology.[1]

     (Logo: http://photos.prnewswire.com/prnh/20140522/689211 )

Bone is the most common site of spread in prostate cancer, accounting for about 90% of metastases, resulting in some of the most painful and functionally compromising complications of the disease.[1]

Professor Johann De Bono, Professor of Experimental Cancer Medicine at The Institute of Cancer Research London, and Head of the Drug Development Unit at The Royal Marsden NHS Foundation Trust, comments:  "These quality of life data endorse the fact that enzalutamide is a major advance in the treatment of prostate cancer."

Enzalutamide is a novel, once-daily, oral androgen receptor signalling inhibitor for the treatment of men with mCRPC whose disease has progressed on or after docetaxel therapy.[3] Prospective analyses of secondary endpoints in the Phase III AFFIRM trial examined first skeletal-related events and investigated several measures of pain control and patient-reported health related quality of life (HRQoL).[1] Researchers found that:[1]

  • Enzalutamide reduced the risk of skeletal-related events (such as radiation treatment to the bone and spinal cord compression) by 31% versus placebo (p=0.0001). The time to first skeletal-related event was significantly longer for patients on enzalutamide compared to placebo (16·7 months vs. 13·3 months; hazard ratio 0·69; p=0·0001).
  • Enzalutamide significantly improved both pain severity and interference from baseline to week 13  compared with placebo (p<0·0001), as well as reducing the risk of pain progression (p=0.0018).
  • Compared to the placebo group, a significantly higher percentage of patients on enzalutamide reported improvements in quality of life measured by FACT-P, a questionnaire used in prostate cancer studies which includes physical, emotional and functional wellbeing. Patients in the enzalutamide group had a significantly longer time to HRQoL deterioration than those in the placebo group (9·0 months vs. 3·7 months; HR 0·45; p<0·0001).

Prostate cancer is the most common cancer in men in Europe, accounting for over 20% of all cancer diagnoses (excluding non-melanoma skin cancer) and is the third most common cause of cancer death in Europe.[4] Up to 40% of men with prostate cancer develop metastatic disease and a high number of these men eventually fail androgen deprivation treatment, which is called castration-resistant prostate cancer (CRPC).[5]

Notes to Editors

About AFFIRM[2],[6]

The phase III AFFIRM trial is a randomised, double-blind, placebo-controlled, multinational trial evaluating enzalutamide (160 mg/day) versus placebo in 1,199 men with progressive metastatic castration-resistant prostate cancer who were previously treated with docetaxel- based chemotherapy. Enrolment was completed in November 2010 and the interim analysis was triggered at 520 events. The median age of study participants was 69 years at baseline.  

The AFFIRM study was conducted at sites in the United States, Canada, Europe, Australia, South America and South Africa. The primary endpoint of the AFFIRM trial was overall survival. Key secondary endpoints included time to prostate-specific antigen (PSA) progression, radiographic progression free survival (rPFS) and time to first skeletal-related event (SRE).

In the phase III AFFIRM trial, enzalutamide was generally well tolerated. The most common adverse reactions were hot flushes and headache. Seizure was reported in 0.8% of enzalutamide-treated patients. Serious adverse events, adverse events causing patients to stop treatment, and adverse events causing death were all lower in the enzalutamide group than in the placebo group.

About XTANDI  

XTANDI (enzalutamide) is a novel, oral, once-daily androgen receptor signalling inhibitor which works in three distinct ways: it inhibits testosterone binding to androgen receptors, nuclear translocation of androgen receptors; and DNA binding and activation by androgen receptors.

Xtandi is currently licensed in Europe for the treatment of adult men with mCRPC whose disease has progressed on or after docetaxel therapy.Marketing authorisation was granted by the European Commission on June 21, 2013.

About Astellas Pharma EMEA  

Astellas Pharma EMEA operates in 40 countries across Europe, the Middle East and Africa, and is the EMEA regional business of Tokyo-based Astellas Pharma Inc. Astellas is a pharmaceutical company dedicated to improving the health of people around the world through the provision of innovative and reliable pharmaceuticals. The organisation's focus is to deliver outstanding R&D and marketing to continue growing in the world pharmaceutical market. Astellas presence in Europe also includes an R&D site and three manufacturing plants. The company employs over 4,500 people across the EMEA region. In 2013 Astellas was awarded SCRIP Pharmaceutical Company of the Year in recognition of its commercial success and pipeline development.

About Astellas Pharma Inc.  

Astellas Pharma Inc. is a pharmaceutical company dedicated to improving the health of people around the world through provision of innovative and reliable pharmaceuticals. The organisation is committed to being a global category leader in Oncology and Urology, and has several oncology compounds in development in addition to enzalutamide.

For more information on Astellas Pharma Inc., please visit our website at http://www.astellas.com/en.  

About Medivation    

Medivation, Inc. is a biopharmaceutical company focused on the rapid development of novel small

molecule drugs to treat serious diseases for which there are limited treatment options. Medivation aims to transform the treatment of these diseases and offer hope to critically ill patients and their families.

For more information, please visit us at http://www.medivation.com.  

About the Medivation/Astellas Collaboration  

In October 2009, Medivation and Astellas entered into a global agreement to jointly develop and

commercialise enzalutamide (formerly MDV3100).The companies are collaborating on a comprehensive development programme that includes studies to develop enzalutamide across the full spectrum of advanced prostate cancer. The companies are jointly commercialising enzalutamide in the United States and Astellas will have responsibility for commercialising enzalutamide outside the U.S, pending further regulatory authorisation. To date, enzalutamide has been filed in Japan, Switzerland and Brazil, and has received authorisation in the US, Canada and the EU.  

References 

1. Fizazi K, Scher HI, Miller K et al. Effect of enzalutamide on time to first skeletal-related event, pain, and quality of life in men with castration-resistant prostate cancer: results from the randomised, phase 3 AFFIRM trial. Lancet Oncology, Volume 15, Issue 10. Pages 1147-1156, September 2014. doi:10.1016/S1470-2045(14)70303-1

2. Scher HI, Fizazi K, Saad F et al, for the AFFIRM Investigators. Increased Survival with Enzalutamide in Prostate Cancer  after Chemotherapy. N Engl J Med 2012;367:1187-97.

3. European Medicines Agency, XTANDI, (enzalutamide) Summary of Product Characteristics, 2013. https://www.medicines.org.uk/emc/medicine/27912/SPC/Xtandi+40mg+soft+capsules/ Last Accessed: 01 September 2014.

4. Ferlay J, Shin HR, Bray F et al. Globocan 2008 v2.0, cancer incidence and mortality worldwide. IARC CancerBase No. 10 [Internet]. Lyon, France: International Agency for Research on Cancer 2010. Available from: http://globocan.iarc.fr. Last accessed March 2014.

5. Beltran H, Beer TM, Carducci MA et al. New therapies for castration-resistant prostate cancer: Efficacy and safety. Eur Urol 2011; 60 (2): 279-290.

6. Scher H I, et al. MDV3100, an Androgen Receptor Signaling Inhibitor (ARSI), Improves Overall Survival in Patients With Prostate Cancer Post Docetaxel; Results From the Phase 3 Affirm Study. Presented at ASCO-GU, 02 February 2012.

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