A Multi-Center Trial of Androgen Suppression With Abiraterone Acetate, Leuprolide, PARP Inhibition and Stereotactic Body Radiotherapy in Prostate Cancer

Running, not enrolling · Phase 1/Phase 2

Conditions studied: Prostate Cancer

In brief

The purpose of this study is to establish the maximum tolerable dose of niraparib when combined with prostate stereotactic body radiotherapy (SBRT), abiraterone, leuprolide, and prednisone (the phase 1 portion of the study) and determine 3-year biochemical PSA recurrence free-survival with this treatment approach (the phase 2 portion of the study).

Key facts

Study ID

NCT04194554

Run by

University of Michigan Rogel Cancer Center

People needed

102

Starts

2020-11-06

Expected to finish

2029-05-01

Last updated by the study team

2026-05-01

Who can join

Age: 18 and older. Sex: male. Healthy volunteers: not accepted.

You may qualify if…

• Pathologic biopsy proven adenocarcinoma of the prostate
• At least one of the following criteria:
• cN1 on conventional or PET imaging
• Grade group 5
• Grade group 4
• Grade group 3 and PSA ≥20 ng/mL
• High probability of Radiographic T3 on MRI AND Grade group ≥2
• Grade Group 3 AND PSA ≥10 ng/mL AND ≥50% positive biopsy cores
• Age ≥ 18
• ECOG < 1
• Adequate organ and marrow function as defined per protocol.
• Use of highly effective contraception (e.g. condoms) for the duration of treatment and a minimum of 120 days thereafter. Men must also agree not to donate sperm for the duration of the study participation, and for at least 120 days thereafter.
• International Prostate Symptoms Score (IPSS) ≤ 20
• Medically fit for treatment and agreeable to follow-up
• Ability to understand and the willingness to sign a written informed consent
• Tissue available for MiOncoSeq testing to assign DNA repair deficiency status

You may not qualify if…

• Clinical or radiographic evidence of distant metastatic disease by CT/bone scan
• Clinical or radiographic evidence of high probability of clinical T4 disease
• Prostate gland size >80 cc measured by ultrasound or MRI
• Prominent median lobe assessed by treating physician
• Lack of tissue from biopsy to be sent for correlative studies
• Any prior treatment for prostate cancer (incudes history of TURP within 5 years of enrollment, chemotherapy, radiation therapy, or anti-androgen therapy)
• Prohibited within 30 days prior to administration to study treatment: spironolactone and other investigational drug therapies.
• Prohibited 3 months before participant registration and during administration of study treatment: non-steroidal anti-androgens (e.g., bicalutamide, flutamide, nilutamide), steroidal antiandrogens (megestrol acetate, cyproterone acetate), oral ketoconazole, chemotherapy, immunotherapy, estrogens, radiopharmaceuticals.
• History of prior pelvic radiation therapy
• Concurrent treatment with strong CYP3A4 inducers such as phenytoin, carbamazepine, rifampin, rifabutin, rifapentine, phenobarbital
• Enrollment concurrently in another investigational drug study within 1 month of registration
• History of another active malignancy within the previous 3 years except for adequately treated skin cancer or superficial bladder cancer
• History of or active Crohn's disease or ulcerative colitis
• Contraindication to or inability to tolerate MRIs
• Patients with severe depression
• Uncontrolled diabetes or known HbA1c>10
• Any gastrointestinal disorder affecting absorption
• Active pituitary or adrenal dysfunction
• Patients with significant cardiovascular disease potentially including severe / unstable angina, recent history of myocardial infarction, clinically significant heart failure, cerebrovascular disease, venous thromboembolic events, clinically significant arrhythmias)
• Uncontrolled hypertension with persistently elevated systolic blood pressure >160 mmgHg or diastolic blood pressure >100 mmHg despite anti-hypertensive agents.
• Prolonged QTc >450 ms or any ECG changes that interfere with QT interval interpretation
• Major surgery within 1 month of registration
• History of myelodysplastic syndrome or leukemia
• A known hypersensitivity to niraparib, abiraterone acetate, leuprolide, and/or prednisone
• Active infection or other medical condition that would be a contraindication to prednisone use

Where it is running

• University of Michigan Rogel Cancer Center — Ann Arbor, Michigan, United States
• Mayo Clinic — Rochester, Minnesota, United States
• Cornell University — New York, New York, United States
• Weill Cornell Medicine — New York, New York, United States
• University Hospitals Seidman Cancer Center — Cleveland, Ohio, United States
• University of Texas Southwestern — Dallas, Texas, United States

Full record on ClinicalTrials.gov

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