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Active, not recruitingNCT03821792Updated Oct 7, 2026

Abiraterone Acetate, Prednisone, and Apalutamide in Treating Patients With Hormone-Naive Metastatic Prostate Cancer

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

Updated Oct 7, 2026Primary completion movedStudy completion movedGo to Updates ↓
Phase
Phase 2
Study type
Interventional
Enrollment
60
Allocation
Not applicable
Ages
18 Years and older
Sex
Male
01

Study summary

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.

Read the detailed description

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.

02

Conditions studied

  • Metastatic Prostate Carcinoma
  • Prostate Adenocarcinoma
  • Prostate Carcinoma Metastatic in the Bone
  • Stage IV Prostate Cancer AJCC v8
  • Stage IVA Prostate Cancer AJCC v8
  • Stage IVB Prostate Cancer AJCC v8

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03

In context

Prostatic Neoplasms

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 →

Lead sponsor

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.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
Male
Accepts healthy volunteers
No

Inclusion criteria

  • Histologically or cytologically confirmed adenocarcinoma of the prostate
  • At least 2 of the 3 following high-risk prognostic factors:

    • Gleason score of >= 8
    • Presence of 3 or more lesions on bone scan
    • Presence of measurable visceral (excluding lymph node disease) metastasis on computed tomography (CT) or magnetic resonance imaging (MRI) (Response Evaluation Criteria in Solid Tumors [RECIST] 1.1)
  • Eastern Cooperative Oncology Group (ECOG) performance status of =\< 2
  • Hemoglobin >= 9.0 g/dL independent of transfusion and/or growth factors within 3 months prior to enrollment
  • Platelet count >= 100,000/uL independent of transfusion and/or growth factors within 3 months prior to enrollment
  • Serum albumin >= 3.0 g/dL
  • Medications known to lower the seizure threshold must be discontinued or substituted at least 4 weeks prior to study entry
  • Absolute neutrophil count (ANC) >= 1,500/mm\^3
  • Calculated creatinine clearance (Cockcroft-Gault equation) >= 45 mL/min
  • Serum potassium >= 3.5 mEg/L
  • Serum magnesium >= 1.6 mg/dL
  • Serum bilirubin \< 1.5 x institutional upper limit of normal (IULN) (except for patients with known Gilbert's disease if total bilirubin is > 1.5 x ULN, measure direct and indirect bilirubin and if direct bilirubin is =\< 1.5 x ULN, subject may be eligible)
  • Serum aspartate aminotransferase (AST) or alanine aminotransferase (ALT) \< 2.5 x IULN for patients without liver metastases. (Note: In subjects with Gilbert's syndrome, if total bilirubin is > 1.5 x ULN, measure direct and indirect bilirubin and if direct bilirubin is =\< 1.5 x ULN, subject may be eligible. For patients with liver metastases AST or ALT \< 4 x IULN is allowed)
  • Able to swallow study drugs whole as a tablet/capsule
  • Agrees to use a condom (even men with vasectomies) and another effective method of birth control if he is having sex with a woman of childbearing potential or agrees to use a condom if he is having sex with a woman who is pregnant while on study drug and for 3 months following the last dose of study drug. Must also agree not to donate sperm during the study and for 3 months after receiving the last dose of study drug
  • Patients must agree to tissue collection for correlative studies at the specified time points

Exclusion criteria

Exclusion Criteria:

  • Small cell prostate cancer
  • 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:

    • Up to 3 months of antiandrogen therapy (ADT) with LHRH agonists or antagonists or orchiectomy with or without concurrent anti-androgens prior to cycle 1 day 1. Anti-androgens (flutamide, bicalutamide or nilutamide) for subjects receiving an LHRH agonist must be discontinued within 2 weeks of cycle 1 day 1, or subjects may have one course of palliative radiation or surgical therapy to treat symptoms resulting from metastatic disease (e.g., impending cord compression or obstructive symptoms) if it was administered at least 28 days prior to cycle 1 day 1. All adverse events associated with these procedures must be resolved at least to grade 1 by cycle 1 day 1, or
  • Any chronic medical condition requiring a higher dose of corticosteroid than 10 mg prednisone/prednisolone daily. Use of inhaled, intranasal, intra-articular and topical steroids are acceptable, as is a short course (i.e. =\< 1 day) of corticosteroids to prevent a reaction to the intravenous (IV) contrast used for CT scans
  • Active infection (requiring oral or IV antibiotics or antiviral therapy) or other medical condition that would make prednisone/prednisolone (corticosteroid) use contraindicated. Known history of testing positive for human immunodeficiency virus (HIV) or known acquired immunodeficiency syndrome (AIDS)
  • A malignancy (other than the one treated in this study) which required radiotherapy or systemic treatment within the past 5 years, or has a >= 30% probability of recurrence within 24 months (except for non-melanoma skin cancer or Ta urothelial carcinomas)
  • Chronically uncontrolled hypertension, defined conventionally as consistent systolic pressures above 170 or diastolic pressures above 110 despite anti-hypertensive therapy. Note that this is NOT a criterion related to particular blood pressure (BP) results at the time of assessment for eligibility, nor does it apply to acute BP excursions that are related to iatrogenic causes, acute pain or other transient, reversible causes. (For example doctor's visit related stress i.e. "white coat syndrome")
  • Prolonged corrected QT interval by Fridericia's formula (QTcF) interval on pre-entry electrocardiogram (>= 450 msec)
  • Known active or symptomatic viral hepatitis or chronic liver disease
  • Clinically significant heart disease as evidenced by myocardial infarction, or arterial thrombotic events in the past 6 months, severe or unstable angina, history of clinically significant ventricular arrhythmias (such as ventricular tachycardia, ventricular fibrillation, or Torsade de pointes), New York Heart Association class III-IV heart disease or cardiac ejection fraction measurement of \< 40% at baseline
  • Patients who have had a history of illness which put them at current risk for bowel perforation such as acute diverticulitis, intra-abdominal abscess, gastrointestinal (GI) obstruction and abdominal carcinomatosis
  • Baseline moderate and severe hepatic impairment (Child Pugh class B \& C)
  • Seizure or known condition that may pre-dispose to seizure (e.g. prior stroke within 1 year to randomization, brain arteriovenous malformation, Schwannoma, meningioma, or other benign central nervous system [CNS] or meningeal disease which may require treatment with surgery or radiation therapy)
  • Gastrointestinal disorder affecting absorption
  • Untreated symptomatic spinal cord compression
  • Any underlying medical or psychiatric condition, which in the opinion of the investigator, will make the administration of study drug hazardous or obscure the interpretation of adverse events
05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
60 participants (estimated)

Study arms

  • Experimental
    Treatment (abiraterone acetate, prednisone, apalutamide)

    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

Interventions

  • DrugAbiraterone Acetate

    Given PO

    Also known as: CB7630, Yonsa, Zytiga

  • DrugApalutamide

    Given PO

    Also known as: ARN 509, ARN-509, ARN509, Erleada, JNJ 56021927, JNJ-56021927

  • DrugPrednisone

    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

06

What researchers measure

Primary outcomes

  1. Time on treatment

    Calculated as the time from start of protocol treatment

    Time frame: Up to 6 months

Secondary outcomes

  1. 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

  2. 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

  3. Efficacy assessed

    prostate specific antigen, bone specific alkaline phosphatase, and urine n-telopeptides

    Time frame: Up to 6 months

  4. 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

  5. Overall survival

    Time from start of protocol treatment until death or last contact

    Time frame: up to 6 months

07

Study locations

1 site
  • M D Anderson Cancer Center
    Houston, Texas 77030, United States
08

References and documents

09

Updates

2 registry updates since Sep 25, 2026
Primary completion
Oct 11, 2026→Oct 11, 2028
Oct 7, 2026
Study completion
Oct 11, 2026→Oct 11, 2028
Oct 7, 2026
Show all 2 updates
  1. Oct 7, 2026
    Primary completion Oct 11, 2026→Oct 11, 2028
    Study completion Oct 11, 2026→Oct 11, 2028
  2. Oct 6, 2026
    Minor edits only
    + 1 other change: verification date

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 ↗

10

Registry details

Key details

Study ID
NCT03821792
Lead sponsor
M.D. Anderson Cancer Center
Collaborators
National Cancer Institute (NCI)
Responsible party
Sponsor
First posted
Jan 30, 2019
Start date
Jul 22, 2019
Primary completion
Oct 11, 2028 (estimated)
Completion
Oct 11, 2028 (estimated)
Last update
Oct 7, 2026

Study contacts

Paul Corn
principal investigator · M.D. Anderson Cancer Center

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

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