Two Studies for Patients With High Risk Prostate Cancer Testing Less Intense Treatment for Patients With a Low Gene Risk Score and Testing a More Intense Treatment for Patients With a High Gene Risk Score, The PREDICT-RT Trial
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ClinicalTrials.gov Identifier: NCT04513717 |
Recruitment Status :
Recruiting
First Posted : August 14, 2020
Last Update Posted : April 12, 2022
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Condition or disease | Intervention/treatment | Phase |
---|---|---|
Metastatic Malignant Neoplasm in the Bone Prostate Adenocarcinoma Stage III Prostate Cancer AJCC v8 Stage IIIA Prostate Cancer AJCC v8 Stage IIIB Prostate Cancer AJCC v8 Stage IIIC Prostate Cancer AJCC v8 Stage IVA Prostate Cancer AJCC v8 | Drug: Apalutamide Drug: Bicalutamide Drug: Buserelin Drug: Degarelix Drug: Flutamide Drug: Goserelin Drug: Histrelin Drug: Leuprolide Other: Quality-of-Life Assessment Other: Questionnaire Administration Radiation: Radiation Therapy Drug: Triptorelin | Phase 3 |

Study Type : | Interventional (Clinical Trial) |
Estimated Enrollment : | 2478 participants |
Allocation: | Randomized |
Intervention Model: | Parallel Assignment |
Masking: | None (Open Label) |
Primary Purpose: | Treatment |
Official Title: | Parallel Phase III Randomized Trials for High Risk Prostate Cancer Evaluating De-Intensification for Lower Genomic Risk and Intensification of Concurrent Therapy for Higher Genomic Risk With Radiation (PREDICT-RT*) |
Actual Study Start Date : | December 15, 2020 |
Estimated Primary Completion Date : | December 31, 2033 |
Estimated Study Completion Date : | December 31, 2033 |

Arm | Intervention/treatment |
---|---|
Active Comparator: Arm I (de-intensification study)
Patients undergo RT over 2-11 weeks and receive ADT (consisting of either leuprolide, goserelin, triptorelin, degarelix, buserelin or histrelin and bicalutamide or flutamide) for 24 months in the absence of disease progression or unacceptable toxicity.
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Drug: Bicalutamide
Antiandrogen
Other Names:
Drug: Buserelin Luteinizing hormone-releasing hormone (LHRH) agonist
Other Names:
Drug: Degarelix Gonadotropin-releasing hormone (GnRH) antagonist
Other Names:
Drug: Flutamide Antiandrogen
Other Names:
Drug: Goserelin Gonadotropin-releasing hormone (GnRH) agonist
Other Name: ICI-118630 Drug: Histrelin Gonadotropin-releasing hormone (GnRH) agonist Drug: Leuprolide Gonadotropin-releasing hormone (GnRH) agonist
Other Name: Leuprorelin Other: Quality-of-Life Assessment Ancillary studies
Other Name: Quality of Life Assessment Other: Questionnaire Administration Ancillary studies Radiation: Radiation Therapy Undergo radiation therapy
Other Names:
Drug: Triptorelin Gonadotropin-releasing hormone (GnRH) agonist
Other Names:
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Experimental: Arm II (de-intensification study)
Patients undergo RT over 2-11 weeks and receive ADT (consisting of either leuprolide, goserelin, triptorelin, degarelix, buserelin or histrelin and bicalutamide or flutamide) for 12 months in the absence of disease progression or unacceptable toxicity.
|
Drug: Bicalutamide
Antiandrogen
Other Names:
Drug: Buserelin Luteinizing hormone-releasing hormone (LHRH) agonist
Other Names:
Drug: Degarelix Gonadotropin-releasing hormone (GnRH) antagonist
Other Names:
Drug: Flutamide Antiandrogen
Other Names:
Drug: Goserelin Gonadotropin-releasing hormone (GnRH) agonist
Other Name: ICI-118630 Drug: Histrelin Gonadotropin-releasing hormone (GnRH) agonist Drug: Leuprolide Gonadotropin-releasing hormone (GnRH) agonist
Other Name: Leuprorelin Other: Quality-of-Life Assessment Ancillary studies
Other Name: Quality of Life Assessment Other: Questionnaire Administration Ancillary studies Radiation: Radiation Therapy Undergo radiation therapy
Other Names:
Drug: Triptorelin Gonadotropin-releasing hormone (GnRH) agonist
Other Names:
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Active Comparator: Arm III (intensification study)
Patients undergo RT over 2-11 weeks and receive ADT as in Arm I.
|
Drug: Bicalutamide
Antiandrogen
Other Names:
Drug: Buserelin Luteinizing hormone-releasing hormone (LHRH) agonist
Other Names:
Drug: Degarelix Gonadotropin-releasing hormone (GnRH) antagonist
Other Names:
Drug: Flutamide Antiandrogen
Other Names:
Drug: Goserelin Gonadotropin-releasing hormone (GnRH) agonist
Other Name: ICI-118630 Drug: Histrelin Gonadotropin-releasing hormone (GnRH) agonist Drug: Leuprolide Gonadotropin-releasing hormone (GnRH) agonist
Other Name: Leuprorelin Other: Quality-of-Life Assessment Ancillary studies
Other Name: Quality of Life Assessment Other: Questionnaire Administration Ancillary studies Radiation: Radiation Therapy Undergo radiation therapy
Other Names:
Drug: Triptorelin Gonadotropin-releasing hormone (GnRH) agonist
Other Names:
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Experimental: Arm IV (intensification study)
Patients undergo RT over 2-11 weeks and receive ADT (consisting of either leuprolide, goserelin, triptorelin, degarelix, buserelin or histrelin) for 24 months in the absence of disease progression or unacceptable toxicity. Patients also receive apalutamide PO QD. Treatment repeats every 90 days for up to 8 cycles (24 months) in the absence of disease progression or unacceptable toxicity.
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Drug: Apalutamide
Nonsteroidal Antiandrogen
Other Names:
Drug: Buserelin Luteinizing hormone-releasing hormone (LHRH) agonist
Other Names:
Drug: Degarelix Gonadotropin-releasing hormone (GnRH) antagonist
Other Names:
Drug: Goserelin Gonadotropin-releasing hormone (GnRH) agonist
Other Name: ICI-118630 Drug: Histrelin Gonadotropin-releasing hormone (GnRH) agonist Drug: Leuprolide Gonadotropin-releasing hormone (GnRH) agonist
Other Name: Leuprorelin Other: Quality-of-Life Assessment Ancillary studies
Other Name: Quality of Life Assessment Other: Questionnaire Administration Ancillary studies Radiation: Radiation Therapy Undergo radiation therapy
Other Names:
Drug: Triptorelin Gonadotropin-releasing hormone (GnRH) agonist
Other Names:
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- Metastasis-free survival (MFS) [ Time Frame: From randomization to the date of detection of distant metastasis on standard imaging or date of death from any cause, assessed up to 13 years ]Assessed based on conventional imaging. MFS will be estimated using the Kaplan-Meier method (Kaplan 1958).
- MFS [ Time Frame: From randomization to the date of detection of distant metastasis on standard imaging or date of death from any cause, assessed up to 13 years ]Assessed based on standard or molecular, if available, imaging. MFS will be estimated using the Kaplan-Meier method (Kaplan 1958)
- Overall survival [ Time Frame: From the date of randomization to the date of death or last known follow-up date, with patients alive at the last known follow-up time treated as censored, assessed up to 13 years ]Will be estimated using the Kaplan-Meier method and treatment arms compared using the stratified log-rank test (Kaplan 1958).
- Prostate cancer specific mortality (PCSM) [ Time Frame: From the date of randomization to the date of prostate cancer death, assessed up to 13 years ]
- Prostate specific antigen (PSA) failure-free survival with non-castrate testosterone and no additional therapies [ Time Frame: From the date of randomization to the date event, or death or censored at the last known follow-up date, assessed up to 13 years ]PSA failure-free survival will be estimated using the Kaplan-Meier method and treatment arms compared using the stratified log-rank test (Kaplan 1958).
- Time to testosterone recovery [ Time Frame: Up to 13 years ]Defined as testosterone that is non-castrate.
- Time to PSA failure or salvage therapy [ Time Frame: Up to 13 years ]
- Testosterone levels at the time of PSA failure and metastases [ Time Frame: Up to 13 years ]
- Incidence of adverse events [ Time Frame: Up to 13 years ]Measured by the Common Terminology Criteria for Adverse Events (CTCAE ) version (v) 5.0 and Patient Reported Outcomes (PRO)-CTCAE.
- Cardio-metabolic markers including body mass index and waist circumference [ Time Frame: Up to 13 years ]
- Machine learning/artificial intelligence algorithm [ Time Frame: Up to 13 years ]
- Bowel and urinary quality of life (De-intensification study) [ Time Frame: Up to 13 years ]Measured by EPIC-26 bowel and urinary domains.
- Cognition (De-intensification study) [ Time Frame: Up to 13 years ]Measured by the Functional Assessment of Chronic Illness Therapy-Cognition (FACIT-Cog) perceived cognitive abilities subscale.
- Sexual, hormonal, bowel, and urinary quality of life (Intensification study) [ Time Frame: Up to 13 years ]Measured by Expanded Prostate Cancer Index Composite-26.
- Cognition (Intensification study) [ Time Frame: Up to 13 years ]Measured by the FACIT-Cog perceived cognitive abilities subscale.

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.
Ages Eligible for Study: | 18 Years and older (Adult, Older Adult) |
Sexes Eligible for Study: | Male |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
- PRIOR TO STEP 1 REGISTRATION
- Pathologically proven diagnosis of adenocarcinoma of prostate cancer within 180 days prior to registration
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High-risk disease defined as having at least one or more of the following:
- PSA > 20 ng/mL prior to starting ADT
- cT3a-T4 by digital exam or imaging (American Joint Committee on Cancer [AJCC] 8th edition [Ed.])
- Gleason score of 8-10
- Node positive by conventional imaging with a short axis of at least 1.0 cm
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Appropriate stage for study entry based on the following diagnostic workup:
- History/physical examination within 120 days prior to registration;
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Bone imaging within 120 days prior to registration;
- Note: To be eligible, patient must have no definitive evidence of bone metastases (M0) on bone scan or sodium fluoride (NaF) PET within 120 days prior to registration (negative NaF PET/CT or negative Axumin or choline PET or negative fluciclovine, choline or prostate-specific membrane antigen (PSMA) PET within 120 days prior to registration is an acceptable substitute if they have been performed). Patients who have bone metastases established only fluciclovine, choline, or PSMA PET but not definitive on bone scan or NaF PET will still be eligible
- CT or MRI of the pelvis within 120 days prior to registration (negative fluciclovine, choline, or PSMA PET within 120 days prior to registration is an acceptable substitute). As with bone staging, nodal staging for trial purposes will be based off of conventional imaging findings only
- Patients with confirmed N1 metastases on conventional imaging (CT/MRI) as defined by >= 10 mm on short axis are eligible but will be automatically assigned to the intensification study. Patients who are positive by fluciclovine, choline, or PSMA PET (i.e. N1), but whose nodes do not meet traditional size criteria for positivity (i.e. they measure =< 10 mm on either the CT or MRI portion of the PET or on a dedicated CT or MRI) will not be considered N1 for the trial and will not automatically be assigned to the intensification study
- Age >= 18
- Eastern Cooperative Oncology Group (ECOG) performance status of 0-2 within 120 days prior to registration
- Hemoglobin >= 9.0 g/dL, independent of transfusion and/or growth factors (within 120 days prior to registration)
- Platelet count >= 100,000 x 10^9/uL independent of transfusion and/or growth factors (within 120 days prior to registration)
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Creatinine clearance (CrCl) >= 30 mL/min estimated by Cockcroft-Gault equation (within 120 days prior to registration)
- For Black patients whose renal function is not considered adequate by Cockcroft-Gault formula, an alternative formula that takes race into account (Chronic Kidney Disease Epidemiology Collaboration CKD-EPI formula) may be used for calculating creatinine clearance for trial eligibility
- Either a CrCl >= 30 ml/min or calculated glomerular filtration rate (GFR) >= 30 will make a patient eligible
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Total bilirubin =< 1.5 x institutional upper limit of normal (ULN) (within 120 days prior to registration)
- 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 is eligible
- Aspartate aminotransferase (AST) (serum glutamic-oxaloacetic transaminase [SGOT]) or alanine aminotransferase (ALT) (serum glutamate pyruvate transaminase [SGPT]) =< 2.5 x institutional ULN (within 120 days prior to registration)
- Serum albumin >= 3.0 g/dL (within 120 days prior to registration)
- The patient must agree 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 agree 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
- Human immunodeficiency virus (HIV)-infected patients on effective anti-retroviral therapy with undetectable viral load within 6 months are eligible for this trial and have a CD4 count >= 200 cells/microliter within 60 days prior to registration. Note: HIV testing is not required for eligibility for this protocol. Of note, for patients with HIV in the intensification trial randomized to apalutamide, highly active antiretroviral therapy (HAART) may need to be adjusted to medications that do not interact with apalutamide
- For patients with evidence of chronic hepatitis B virus (HBV) infection, the HBV viral load must be undetectable after or on suppressive therapy within 60 days prior to registration, if indicated. Note: HBV viral testing is not required for eligibility for this protocol
- Patients with a prior or concurrent malignancy whose natural history or treatment does not have the potential to interfere with the safety or efficacy assessment of the investigational regimen are eligible for this trial. Note: Any patient with a cancer (other than keratinocyte carcinoma or carcinoma in situ or low-grade non-muscle invasive bladder cancer) who has been disease-free for less than 3 years must contact the principal investigator
- The patient or a legally authorized representative must provide study-specific informed consent prior to study entry
- PRIOR TO STEP 2 RANDOMIZATION
- Confirmation of Decipher score
- Patients with a history of hepatitis C virus (HCV) infection must have been treated and cured. For patients with HCV infection who are currently on treatment, they are eligible if they have an undetectable HCV viral load within 60 days prior. Note: Apalutamide may interfere with HCV drugs. Patients on HCV medications should alert their infectious diseases physician if they get randomized to apalutamide due to the possibility that apalutamide can affect the bioavailability of some HCV medications. HCV viral testing is not required for eligibility for this protocol
- For patients entering the Intensification Cohort ONLY: Patients must discontinue or substitute concomitant medications known to lower the seizure threshold at least 30 days prior to Step 2 randomization
Exclusion Criteria:
- PRIOR TO STEP 1 REGISTRATION:
- Definitive radiologic evidence of metastatic disease outside of the pelvic nodes (M1a, M1b or M1c) on conventional imaging (i.e. bone scan, CT scan, MRI)
- Prior systemic chemotherapy within =< 3 years prior to registration; note that prior chemotherapy for a different cancer is allowed (completed > 3 years prior to registration
- Prior radical prostatectomy
- Prior radiotherapy to the region of the study cancer that would result in overlap of radiation therapy fields
- Current use of 5-alpha reductase inhibitor. NOTE: If the alpha reductase inhibitor is stopped prior to randomization the patient is eligible
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History of any of the following:
- Seizure disorder
- Current severe or unstable angina
- New York Heart Association Functional Classification III/IV (Note: Patients with known history or current symptoms of cardiac disease, or history of treatment with cardiotoxic agents, should have a clinical risk assessment of cardiac function using the New York Heart Association Functional Classification.)
- History of any condition that in the opinion of the investigator, would preclude participation in this study
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Evidence of any of the following at registration:
- Active uncontrolled infection requiring IV antibiotics
- Baseline severe hepatic impairment (Child Pugh Class C)
- Inability to swallow oral pills
- Any current condition that in the opinion of the investigator, would preclude participation in this study
- Prior pharmacologic androgen ablation for prostate cancer is allowed only if the onset of androgen ablation (both luteinizing hormone-releasing hormone [LHRH] agonist and oral anti-androgen) is =< 60 days prior to registration; Please note: baseline PSA must be obtained prior to the start of any ADT
- PRIOR TO STEP 2 RANDOMIZATION:
- Evidence of known gastrointestinal disorder affecting absorption of oral medications at registration
- For patients entering the Intensification Cohort ONLY: Presence of uncontrolled hypertension (persistent systolic blood pressure [BP] >= 160 mmHg or diastolic BP >= 100 mmHg). Subjects with a history of hypertension are allowed, provided that BP is controlled to within these limits by anti-hypertensive treatment

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04513717

Principal Investigator: | Paul L Nguyen | NRG Oncology |
Responsible Party: | NRG Oncology |
ClinicalTrials.gov Identifier: | NCT04513717 |
Other Study ID Numbers: |
NRG-GU009 NCI-2020-04705 ( Registry Identifier: CTRP (Clinical Trial Reporting Program) ) NRG-GU009 ( Other Identifier: NRG Oncology ) NRG-GU009 ( Other Identifier: CTEP ) U10CA180868 ( U.S. NIH Grant/Contract ) |
First Posted: | August 14, 2020 Key Record Dates |
Last Update Posted: | April 12, 2022 |
Last Verified: | April 2022 |
Studies a U.S. FDA-regulated Drug Product: | Yes |
Studies a U.S. FDA-regulated Device Product: | No |
Prostatic Neoplasms Neoplasms Genital Neoplasms, Male Urogenital Neoplasms Neoplasms by Site Prostatic Diseases Leuprolide Goserelin Triptorelin Pamoate Flutamide Bicalutamide Tryptophan Buserelin Hormones Hormones, Hormone Substitutes, and Hormone Antagonists |
Physiological Effects of Drugs Fertility Agents, Female Fertility Agents Reproductive Control Agents Antineoplastic Agents, Hormonal Antineoplastic Agents Androgen Antagonists Hormone Antagonists Luteolytic Agents Contraceptive Agents, Female Contraceptive Agents Contraceptive Agents, Hormonal Antidepressive Agents, Second-Generation Antidepressive Agents Psychotropic Drugs |