A Phase 2 interventional study of Abiraterone Acetate and Apalutamide in Metastatic Prostate Carcinoma, Prostate Adenocarcinoma and Prostate Carcinoma Metastatic in the Bone, sponsored by M.D. Anderson Cancer Center. Active, not recruiting at 1 site in United States. Open to male participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-10-07.
Sponsored by M.D. Anderson Cancer Center · Phase 2, Interventional, and Treatment
This phase II trial studies how well abiraterone acetate, prednisone, and apalutamide work in treating patients with hormone-naive prostate cancer that has spread to other places in the body. Androgen can cause the growth of prostate cancer cells. Antihormone therapy, such as abiraterone acetate and apalutamide may lessen the amount of androgen made by the body.
PRIMARY OBJECTIVES:
I. Determine if a baseline molecular-pathologic androgen receptor response (AR-response) signature predicts efficacy to abiraterone plus apalutamide in patients with hormone-naive metastatic prostate cancer (HNMPCa).
SECONDARY OBJECTIVES:
I. Evaluate the efficacy of abiraterone acetate plus apalutamide in patients with HNMPCa.
II. Evaluate the safety of abiraterone acetate plus apalutamide in patients with HNMPCa.
III. Explore the relationship between molecular markers and clinical efficacy outcomes.
OUTLINE:
Patient receive abiraterone acetate orally (PO) daily, prednisone PO twice daily (BID), and apalutamide PO daily. Cycles repeat every 28 days for 1 year in the absence of disease progression or unacceptable toxicity.
After completion of study treatment, patients are followed up at 30 days and then for up to 6 months.
6,370 studies on the registry are indexed under Prostatic Neoplasms; 1,400 are open to participants now.
This study's planned enrollment of 60 is close to the median of 58 across 4,822 interventional studies indexed under Prostatic Neoplasms.
Browse Prostatic Neoplasms studies →M.D. Anderson Cancer Center is the lead sponsor of 2,999 studies on the registry; 581 are open to participants now.
Of its 599 completed or terminated interventional studies of FDA-regulated products, 402 (67%) have results posted.
Counted across the registry records on this site, refreshed daily.
At least 2 of the 3 following high-risk prognostic factors:
Exclusion Criteria:
Treatment within 28 days of cycle 1 day 1: Any prior pharmacotherapy, radiation therapy, or surgery for metastatic prostate cancer. The following exceptions are permitted:
Patient receive abiraterone acetate PO daily, prednisone PO BID, and apalutamide PO daily. Cycles repeat every 28 days for 1 year in the absence of disease progression or unacceptable toxicity.
Drug: Abiraterone Acetate · Drug: Apalutamide · Drug: Prednisone
Given PO
Also known as: CB7630, Yonsa, Zytiga
Given PO
Also known as: ARN 509, ARN-509, ARN509, Erleada, JNJ 56021927, JNJ-56021927
Given PO
Also known as: .delta.1-Cortisone, 1, 2-Dehydrocortisone, Adasone, Cortancyl, Dacortin, DeCortin, Decortisyl, Decorton, Delta 1-Cortisone, Delta-Dome, Deltacortene, Deltacortisone, Deltadehydrocortisone, Deltasone, Deltison, Deltra, Econosone, Lisacort, Meprosona-F, Metacortandracin, Meticorten, Ofisolona, Orasone, Panafcort, Panasol-S, Paracort, Perrigo Prednisone, PRED, Predicor, Predicorten, Prednicen-M, Prednicort, Prednidib, Prednilonga, Predniment, Prednisone Intensol, Prednisonum, Prednitone, Promifen, Rayos, Servisone, SK-Prednisone
Time on treatment
Calculated as the time from start of protocol treatment
Time frame: Up to 6 months
Progression free survival (PFS)
Median PFS and 95% confidence interval will be presented for all patients and by the androgen receptor molecular-pathologic responsiveness signature.
Time frame: Time from starting treatment until progression, assessed up to 6 months
Incidence of adverse events
Will be assessed by National Cancer Institute Common Terminology Criteria for Adverse Events version 5.0.
Time frame: Up to 6 months
Efficacy assessed
prostate specific antigen, bone specific alkaline phosphatase, and urine n-telopeptides
Time frame: Up to 6 months
Expression of candidate markers
Candidate markers for different biologic domains by immunohistochemistry, mass spectrometry (for steroid metabolome) and genomic profiling. Markers will encompass bone remodeling (e.g. integrin signaling), steroid metabolome (e.g. glucocorticoid receptor) and tumor immunoprofile (e.g. PD-1, PDL-1).
Time frame: Up to 6 months
Overall survival
Time from start of protocol treatment until death or last contact
Time frame: up to 6 months
From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗
This study is active, not recruiting, as verified in Oct 2026. You cannot join it, but the record below documents what was studied.
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M.D. Anderson Cancer Center