This submission is based on Phase 3 data from the pivotal ARN-509-003 (SPARTAN) clinical trial, which assessed the safety and efficacy of apalutamide versus placebo, in men with non-metastatic CRPC who have a rapidly rising prostate specific antigen (PSA) despite receiving continuous androgen deprivation therapy (ADT).1 Men with non-metastatic CRPC with a rapidly rising PSA are at high-risk for developing metastatic disease.2,3 The primary endpoint of this study was metastasis free survival (MFS).1 MFS is the time from randomization to first evidence of confirmed metastasis, or time to death.4 The SPARTAN study results will be presented at a future medical meeting.
“The SPARTAN data lead the path towards a new approach to treating men with prostate cancer earlier in the disease course. We have demonstrated that treating patients before the disease has metastasized improves outcomes,” said Peter Lebowitz, M.D., Ph.D., Global Therapeutic Area Head of Oncology at Janssen. “We are thrilled to have completed our submission of the SPARTAN data to the FDA and we look forward to a promising treatment that can provide new hope and expectations for men facing this disease.”Prostate cancer is the most common cancer among American men, other than skin cancer.5 According to the American Cancer Society, more than 161,000 men are estimated to be diagnosed with prostate cancer in 2017.5 Patients with non-metastatic prostate cancer receiving ADT will eventually become resistant to ADT, developing castration-resistant prostate cancer (CRPC). Data has estimated 10% to 20% of patients diagnosed with prostate cancer may develop CRPC within approximately 5 years.6
1 Clinical trials gov. A Study of Apalutamide (ARN-509) in Men with Non-Metastatic Castration-Resistant Prostate Cancer (SPARTAN). Available at: https://clinicaltrials.gov/ct2/show/NCT01946204. Accessed September 2017.
2 Smith MR, et al. Natural history of rising serum prostate-specific antigen in men with castrate nonmetastatic prostate cancer. J Clin Oncol. 2005;23:2918-2925.
3 Lin JH, et al. Association of prostate specific-antigen doubling time (PSADT) with metastasis-free survival (MFS) and overall survival (OS) in non-metastatic castration-resistent prostate cancer (nmCRPC). J Clin Oncol 2017;35(15 suppl). Abstract e16525.
4 Xie W, et al. Metastasis-Free Survival Is a Strong Surrogate of Overall Survival in Localized Prostate Cancer. Journal of Clinical Oncology. 2017; 0732-183X/17/3599-1.
5 American Cancer Society. Key Statistics for Prostate Cancer.
6 Kirby M, Hirst C, Crawford ED. Characterising the castration-resistant prostate cancer population: a systematic review. Int J Clin Pract. 2011;65:1180-1192.
7 Scher HI, et al. Design and end points of clinical trials for patients with progressive prostate cancer and castrate levels of testosterone: recommendations of the Prostate Cancer Clinical Trials Working Group. J Clin Oncol. 2008;26:1148-1159.
8 Scher HI, et al. Trial Design and Objectives for Castration-Resistant Prostate Cancer: Updated Recommendations From the Prostate Cancer Clinical Trials Working Group 3. J Clin Oncol. 2016;34:1402-1418.
9 Virgo K, et al. Second-Line Hormonal Therapy for Men With Chemotherapy-Naïve, Castration-Resistant Prostate Cancer: American Society of Clinical Oncology Provisional Clinical Opinion. Journal of Clinical Oncology. 2017; 0732-183X/17/3599-1.
10 Modern Medicine. “Treatment of Nonmetastatic Castration-Resistant Prostate Cancer.”