NCT06650579

Brief Summary

This phase III/IV trial compares the impact of leuprolide and abiraterone acetate (AA) versus relugolix and AA on the heart in hormone-naive patients with advanced prostate cancer receiving pelvic radiation therapy. Leuprolide is in a class of medications called gonadotropin-releasing hormone agonists (GNRHa). It prevents the body from making luteinizing hormone-releasing hormone (LHRH) and luteinizing hormone (LH). This causes the testicles to stop making testosterone (a male hormone) in men and may stop the growth of prostate tumor cells that need testosterone to grow. Abiraterone acetate, an androgen biosynthesis inhibitor, works by decreasing the amount of certain hormones in the body. Relugolix, a GNRH antagonist, works by decreasing the amount of testosterone produced by the body. This may slow or stop the spread of prostate tumor cells that need testosterone to grow. The use of hormone therapy with radiation therapy has been shown to improve survival, however, studies have suggested that the addition of hormone therapy may worsen heart (cardiac) disease and high blood pressure. In fact, studies have shown that the most common cause of death in prostate cancer patients is due to heart disease or heart attacks. Computed tomography (CT) scans create a series of detailed pictures of areas inside the body; the pictures are created by a computer linked to an x-ray machine. In this study, sophisticated cardiac CT images are used to take pictures of patients' heart and coronary arteries to help assess damage to the heart. Using cardiac CT and blood tests, this trial may help doctors determine which patients are at risk of cardiac disease when treated with combination hormone therapy, as well as the differential risk of leuprolide versus relugolix in combination with abiraterone acetate.

Trial Health

77
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
72

participants targeted

Target at below P25 for phase_3

Timeline
39mo left

Started Jan 2025

Typical duration for phase_3

Geographic Reach
1 country

4 active sites

Status
recruiting

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Progress29%
Jan 2025Jul 2029

First Submitted

Initial submission to the registry

October 18, 2024

Completed
3 days until next milestone

First Posted

Study publicly available on registry

October 21, 2024

Completed
3 months until next milestone

Study Start

First participant enrolled

January 31, 2025

Completed
4.4 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

July 1, 2029

Expected
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

July 1, 2029

Last Updated

February 24, 2026

Status Verified

February 1, 2026

Enrollment Period

4.4 years

First QC Date

October 18, 2024

Last Update Submit

February 22, 2026

Conditions

Keywords

node-positive prostate canceradvanced prostate cancervery-high-risk prostate cancer

Outcome Measures

Primary Outcomes (3)

  • Incidence of ambulatory systolic blood pressure (BP) > 140 or diastolic > 90 (measurement on 2 separate days)

    The change will be estimated and tested using paired tests (Wilcoxon signed rank test or McNemar test). The difference at each interval for the two groups will be tested using Fisher's exact test for binary endpoints or Wilcoxon rank-sum test for continuous. Data transformation to fit statistical assumptions will be done as needed. Multivariable models that control for potential confounders will be implemented using general linear and logistic regression.

    At baseline and up to 12 months

  • Need for new or escalated anti-hypertensive medication

    The change will be estimated and tested using paired tests (Wilcoxon signed rank test or McNemar test). The difference at each interval for the two groups will be tested using Fisher's exact test for binary endpoints or Wilcoxon rank-sum test for continuous. Data transformation to fit statistical assumptions will be done as needed. Multivariable models that control for potential confounders will be implemented using general linear and logistic regression.

    At baseline and up to 12 months

  • Incidence of moderate-to-severe atherosclerosis of major coronary vessels

    Defined as \> 50% luminal stenosis per the Society of Cardiac Computed Tomography. Change will be tested using paired tests (Wilcoxon signed rank test or McNemar test). Luminal stenosis will be measured on a per-vessel basis. Proportion of patients achieving \> 50% luminal stenosis of a major coronary vessel between each arm will be compared using Fisher's exact test. The percent change of maximal stenosis between the two arms will be tested using Wilcoxon signed rank test.

    From month 0 to month 12

Secondary Outcomes (5)

  • Total plaque volume

    From month 0 to month 12

  • Pre-existing genomic alterations promoting inflammatory immunity and associated with cardiovascular disease

    At baseline

  • Castration rate

    At study days 7, 30 and 90

  • Sustained castration

    At months 6 and 12

  • Testosterone recovery

    At day 30 and/or day 90 following completion of androgen deprivation therapy

Study Arms (2)

Arm I (leuprolide plus abiraterone acetate/prednisone)

EXPERIMENTAL

Patients receive leuprolide IM or SC injections every 3 to 6 months plus oral abiraterone acetate (AA) with prednisone daily for up to 24 months in the absence of disease progression or unacceptable toxicity. Patients also undergo standard of care radiation therapy.

Drug: Abiraterone AcetateDrug: BicalutamideProcedure: Biospecimen CollectionProcedure: Computed Tomography AngiographyDrug: LeuprolideDrug: PrednisoneRadiation: Radiation Therapy

Arm II (relugolix + abiraterone acetate/prednisone)

EXPERIMENTAL

Patients receive oral relugolix daily plus oral abiraterone acetate (AA) with prednisone daily for up to 24 months in the absence of disease progression or unacceptable toxicity. Patients also undergo standard of care radiation therapy.

Drug: Abiraterone AcetateProcedure: Biospecimen CollectionProcedure: Computed Tomography AngiographyDrug: PrednisoneRadiation: Radiation TherapyDrug: Relugolix

Interventions

Undergo CCTA

Also known as: CT ANGIOGRAPHY, CT Scan Angiography, CTA
Arm I (leuprolide plus abiraterone acetate/prednisone)Arm II (relugolix + abiraterone acetate/prednisone)

Given PO

Also known as: Casodex, Cassotide, Cosudex, ICI 176,334, ICI 176334, Utamide
Arm I (leuprolide plus abiraterone acetate/prednisone)

Given abiraterone acetate

Also known as: BR9004, BR9004-1, CB 7630, CB-7630, CB7630, JNJ-212082, Yonsa, Zytiga
Arm I (leuprolide plus abiraterone acetate/prednisone)Arm II (relugolix + abiraterone acetate/prednisone)

Undergo blood sample collection

Also known as: Biological Sample Collection, Biospecimen Collected, Specimen Collection
Arm I (leuprolide plus abiraterone acetate/prednisone)Arm II (relugolix + abiraterone acetate/prednisone)

Given IM or SC

Also known as: Leuprorelin
Arm I (leuprolide plus abiraterone acetate/prednisone)

Given prednisone

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
Arm I (leuprolide plus abiraterone acetate/prednisone)Arm II (relugolix + abiraterone acetate/prednisone)

Undergo standard of care radiation therapy

Also known as: Cancer Radiotherapy, Energy Type, ENERGY_TYPE, Irradiate, Irradiated, Irradiation, Radiation, Radiation Therapy, NOS, Radiotherapeutics, Radiotherapy, RT, Therapy, Radiation
Arm I (leuprolide plus abiraterone acetate/prednisone)Arm II (relugolix + abiraterone acetate/prednisone)

Given PO

Also known as: N-(4-(1-((2,6-Difluorophenyl)methyl)-5-((dimethylamino)methyl)-1,2,3,4-tetrahydro-3-(6-methoxy-3-pyridazinyl)-2,4-dioxothieno(2,3-d)pyrimidin-6-yl)phenyl)-N'-methoxyurea, Orgovyx, Relumina, TAK 385, TAK-385, TAK385
Arm II (relugolix + abiraterone acetate/prednisone)

Eligibility Criteria

Age18 Years+
Sexmale
Healthy VolunteersNo
Age GroupsAdult (18-64), Older Adult (65+)

You may qualify if:

  • Men ≥ 18 years old
  • Non-metastatic prostate cancer
  • Non-metastatic, biochemically recurrent prostate cancer
  • Plan to undergo curative-intent pelvic radiation therapy (photons or protons) with or without brachytherapy
  • Plan to undergo up to 24 months of combination androgen deprivation therapy (ADT) plus AA and prednisone

You may not qualify if:

  • Metastatic prostate cancer requiring indefinitive ADT or chemotherapy
  • Prior exposure to androgen deprivation therapy
  • Prior exposure to chemotherapy, immunotherapy, or radiation therapy
  • History of cardiac bypass surgery or percutaneous coronary intervention
  • History of cardiac pacemaker or defibrillator

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (4)

Emory Proton Therapy Center

Atlanta, Georgia, 30308, United States

RECRUITING

Winship at Emory Midtown

Atlanta, Georgia, 30308, United States

RECRUITING

Emory University Hospital/Winship Cancer Institute

Atlanta, Georgia, 30322, United States

RECRUITING

Emory Saint Joseph's Hospital

Atlanta, Georgia, 30342, United States

RECRUITING

MeSH Terms

Conditions

Prostatic Neoplasms

Interventions

Abiraterone AcetatebicalutamideSpecimen HandlingLeuprolidePrednisonedeltacorteneprednylideneRadiotherapyRadiationrelugolix

Condition Hierarchy (Ancestors)

Genital Neoplasms, MaleUrogenital NeoplasmsNeoplasms by SiteNeoplasmsGenital Diseases, MaleGenital DiseasesUrogenital DiseasesProstatic DiseasesMale Urogenital Diseases

Intervention Hierarchy (Ancestors)

AndrostenesAndrostanesSteroidsFused-Ring CompoundsPolycyclic CompoundsClinical Laboratory TechniquesDiagnostic Techniques and ProceduresDiagnosisInvestigative TechniquesGonadotropin-Releasing HormonePituitary Hormone-Releasing HormonesHypothalamic HormonesPeptide HormonesHormonesHormones, Hormone Substitutes, and Hormone AntagonistsNeuropeptidesPeptidesAmino Acids, Peptides, and ProteinsOligopeptidesNerve Tissue ProteinsProteinsPregnadienediolsPregnadienesPregnanesTherapeuticsPhysical Phenomena

Study Officials

  • Sagar A Patel, MD

    Emory University Hospital/Winship Cancer Institute

    PRINCIPAL INVESTIGATOR

Central Study Contacts

Study Design

Study Type
interventional
Phase
phase 3
Allocation
RANDOMIZED
Masking
DOUBLE
Who Masked
INVESTIGATOR, OUTCOMES ASSESSOR
Masking Details
All principal investigators and co-investigators will be blinded to randomization block. All cardiac computed tomography images will be analyzed by a blinded level 3 boarded cardiac imaging expert.
Purpose
TREATMENT
Intervention Model
PARALLEL
Sponsor Type
OTHER
Responsible Party
PRINCIPAL INVESTIGATOR
PI Title
Principal Investigator

Study Record Dates

First Submitted

October 18, 2024

First Posted

October 21, 2024

Study Start

January 31, 2025

Primary Completion (Estimated)

July 1, 2029

Study Completion (Estimated)

July 1, 2029

Last Updated

February 24, 2026

Record last verified: 2026-02

Locations