Focal Radiation With Pulsed Systemic Therapy of Abiraterone, Androgen Deprivation Therapy (ADT), Lynparza Towards Castration Sensitive Oligometastatic Prostate Cancer (FAALCON)

September 25, 2023 updated by: University of Michigan Rogel Cancer Center

Focal Radiation With Pulsed Systemic Therapy of Abiraterone, ADT, Lynparza Towards Castration Sensitive Oligometastatic Prostate Cancer (FAALCON): A Phase II, Single Arm, Single Institution Study

The purpose of this study is to assess the safety and effectiveness of radiation therapy with hormone therapy (ADT) and chemotherapy as an investigational study treatment for prostate cancer. This is a phase 2 study to deliver focal radiation with pulsed systemic therapy of Abiraterone, ADT and Lynparza (olaparib) in men with castration sensitive oligometastatic prostate cancer.

Study Overview

Study Type

Interventional

Enrollment (Estimated)

29

Phase

  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

    • Michigan
      • Ann Arbor, Michigan, United States, 48109
        • Recruiting
        • University of Michigan Rogel Cancer Center
        • Principal Investigator:
          • Zachary Reichert, MD, PhD
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

16 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Histologic or cytologic diagnosis of prostate adenocarcinoma (pure small cell or pure neuroendocrine prostate cancer are not allowed).
  • Prior radical prostatectomy OR external beam radiation with curative intent (e.g. HiFU or partial gland therapies are not acceptable) delivered to prostate. Patients with prior radical prostatectomy with positive margins must have undergone salvage or adjuvant radiation.
  • Have newly diagnosed oligometastatic prostate cancer based on molecular imaging (e.g. 68Ga-PSMA PET/CT or Axumin, excludes FDG-PET). Oligometastatic prostate cancer is between 1 and ≤ 5 radiation treatment sites. A site can be up to 5 cm and contain multiple lesions.
  • Newly diagnosed oligometastatic disease requires that no prior image guided radiation was given to sites outside of the prostate bed or pelvic lymph nodes that are typically treated in the salvage or adjuvant radiation setting.
  • Patients must have a PSA >0.2 ng/mL (confirmed ≥4 weeks later with subsequent rise) for those who underwent radical prostatectomy. For those with prior curative radiotherapy, they must meet the Phoenix criteria for progression (nadir of PSA + 2 ng/mL)
  • Medically fit for radiotherapy
  • All molecular positive disease is within an anatomic distribution that (in the view of the radiation oncologist) can be treated safely per standard radiation oncology principles
  • Candidate for androgen deprivation therapy (e.g. leuprolide, goserelin, degarelix) abiraterone therapy (financial and medical) in view of medical oncology using package insert for guidance
  • Patient must have normal organ and bone marrow function measured within 28 days prior to administration of study treatment as defined per protocol
  • Androgen deprivation therapy with or without second generation androgen receptor inhibitors or abiraterone (when given to optimize focal therapies like surgery or radiation) in the curative setting are allowed as long as testosterone has recovered to above 150 ng/dL.
  • Androgen deprivation therapy (with or without second generation androgen receptor inhibitors or abiraterone) for metastatic disease is allowed up to 4 weeks prior to registration. If previous ADT was used in curative setting, testosterone recovery must be documented (testosterone >150 ng/dL) OR >1 year elapsed from last administration of curative attempt ADT before recent ADT was resumed.
  • ECOG ≤1
  • Patients must use a condom during treatment and for 6 months after the last dose of olaparib or abiraterone when having sexual intercourse with a pregnant woman or with a woman of childbearing potential. Female partners of childbearing potential of patients on study should also use a highly effective form of contraception.
  • Capable of giving signed informed consent

Exclusion Criteria:

  • Prior orchiectomy
  • Prior exposure to PARP inhibitors, docetaxel or cabazitaxel.
  • Has a known additional malignancy within the past 3 years that has required treatment excluding superficial squamous skin cancer or carcinoma in situ of bladder or head and neck (those are permissible).
  • Life expectancy ≤3 years in view of treating provider
  • Presence of known parenchymal brain metastasis (imaging not required in absence of symptoms)
  • Symptoms of cord compression requiring immediate radiation.
  • Patients with myelodysplastic syndrome (MDS)/ acute myeloid leukemia (AML) or with features suggestive of MDS/AML per primary provider
  • Severe hepatic impairment (Child-Pugh Class C)
  • Patients with known active hepatitis infection (e.g. hepatitis B, or C)
  • Concurrent use of strong CYP3A inducers (e.g. phenytoin, carbamazepine, rifampin, rifabutin, rifapentine, phenobarbital, nevirapine, St. John's Wort) or moderate inducers (e.g bosentan, efavirenz or modafinil). The required washout period prior to starting olaparib is 5 weeks for phenobarbital or enzlautamide and 3 weeks for other agents. The washout requirement is measured from anticipated start of Olaparib, NOT from start of study.
  • Concomitant use of known strong CYP3A inhibitors (e.g. intraconazole, telithromycin, clarithromycin, protease inhibitors boosted with ritonavir or cobicistat, indinavir, saquinavir, nelfinavir, boveprevir, telaprevir) or moderate CYP3A inhibitors (e.g. ciprofloxacin, erythromycin, diltiazem, fluconazole, verapamil). The required washout period prior to starting olaparib is 2 weeks. The washout requirement is measured from anticipated start of olaparib, NOT from start of study.
  • Major surgery within 2 weeks of starting study treatment and patient must have recovered from any effects of any major surgery
  • Clinically significant cardiovascular disease as evidenced by:

    • myocardial infarction or arterial thrombotic events (e.g. stroke) in the past 6 months
    • resting EKG indicating uncontrolled, potentially reversible cardiac candiation, as judged by the investigator (e.g. unstable ischemia, uncontrolled symptomatic arrhythmia, QTc Fridericia prolongation >500 ms) or patients with congenital long QT syndrome
    • severe or unstable angina, uncontrolled atrial fibrillation (controlled atrial fibrillation is allowed) or other (non-atrial fibrillation) cardiac arrhythmia requiring therapy
    • Active New York Heart Association Class II-IV heart failure
    • if any prior history of CHF (regardless of New York Heart Association assignment), a cardiac ejection fraction measurement (by echocardiography or multigated acquisition scan) is required within 6 months and mush not be <50%.
  • Planned or scheduled cardiac surgery or percutaneous coronary intervention procedure
  • Prior revascularization procedure (coronary, carotid or peripheral artery stenosis) within the past 12 months
  • History of uncontrolled pituitary or adrenal dysfunction
  • Active infection or other medical condition that would make prednisone use contraindicated
  • Any chronic medical condition requiring a systemic dose of corticosteroid >10 mg prednisone daily
  • Prior allogeneic bone marrow transplant or double umbilical cord blood transplantation
  • Participation in another clinical study with an investigational product or investigational medical devices within 1 month of registration
  • Involvement in the planning and/or conduct of the study (applies to both AstraZeneca and Merck staff and/or staff at the University of Michigan).
  • Judgment by the investigator that the patient should not participate in the study if the patient is unlikely to comply with study procedures, restrictions and requirements.
  • Uncontrolled hypertension (systolic blood pressure ≥160 mmHg) of diastolic blood pressure ≥95 mmHg. Patients with documented white coat syndrome (with home blood pressure machine compared to office for calibration) are allowed if home blood pressure measured daily for a week meet eligibility
  • Known hypersensitivity to olaparib, abiraterone, planned ADT agent (e.g. leuprolide, goserelin, degarelix), any of the excipients of any of these agents (olaparib, abiraterone, planned ADT agent) or drugs with a similar chemical structure to them or class to agents (olaparib, abiraterone or planned ADT)
  • Immunocompromised patients
  • Patients who are considered a poor medical risk due to a serious uncontrolled medical disorder, non-malignant systemic disease or active, uncontrolled infection. Examples not discussed elsewhere include, but are not limited to uncontrolled seizure disorder, superior vena cava syndrome or any psychiatric disorder that prohibits informed consent
  • Persistent toxicities (CTCAE Grade ≥2) caused by previous cancer therapy, excluding alopecia or sensory peripheral neuropathy
  • Patients who are unable to swallow orally administered medication and patients with gastrointestinal disorders likely to interfere with absorption of the study medication

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Abiraterone, ADT, Radiation and Olaparib
Abiraterone, ADT, radiation to all metastases and Olaparib.
Abiraterone 1000 mg by mouth per day for approximately 6 months.
Other Names:
  • Zytiga
Prednisone 5 mg by mouth per day for approximately 6 months.
External beam radiotherapy, dose will depend on lesion location. Completed within 40 days of study start.
ADT by luteinizing hormone-releasing hormone (LHRH) agonist or antagonist for 6 months.
Olaparib tablets 300 mg by mouth twice a day for approximately 5 months.
Other Names:
  • Lynparza
  • AZD2281

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Percentage of patients without treatment failure at 24 months
Time Frame: 24 months after enrollment

Treatment failure is defined as one of the following:

  • New or progressive metastases on Computed Tomogrophy (CT)/Magnetic Resonance Imaging (MRI) per Response Evaluation Criteria In Solid Tumors (RECIST)
  • New lesion(s) on bone scan without alternate explanations (e.g. trauma, arthritis) in distribution consistent with prostate cancer metastases, by provider assessment
  • Clinical progression by provider assessment
  • Prostate Specific Antigen (PSA) doubling time under 6 months with an absolute final PSA over 1.5 ng/mL
24 months after enrollment

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Percentage of patients with undetectable PSA, testosterone >150 ng/dL and without treatment failure.
Time Frame: Up to 36 months after enrollment
The number of patients who achieve an undetectable PSA (PSA ≤ 0.2 ng/mL) AND have a testosterone >150 ng/dL will be divided by the number of patients treated in the study with a 95% confidence interval (CI). This will be analyzed at 12, 18, 24 and 36 months.
Up to 36 months after enrollment
Rate of obtaining an optimal PSA (PSA ≤ 0.2 ng/mL)
Time Frame: Up to 36 months months after enrollment
The number of patients who achieve an undetectable PSA (PSA ≤ 0.2 ng/mL) will be divided by the number of patients treated in the study with a 95% CI. This will be analyzed at 12, 18, 24 and 36 months.
Up to 36 months months after enrollment
Time to Androgen Deprivation Therapy (ADT) restart
Time Frame: Up to 36 months months after enrollment
Time to ADT restart is defined as time from day 0 to restarting of gonadotropin-releasing hormone (GNRH) agonist or antagonist. The time to ADT restart may be determined by Kaplan-Meier methods.
Up to 36 months months after enrollment
Time to subsequent therapy (e.g. ADT, radiation)
Time Frame: Up to 36 months after enrollment
Time to subsequent therapy (e.g. ADT or radiation) will be measured from day 0 to start of therapy and determined by Kaplan-Meier methods.
Up to 36 months after enrollment
Frequency of adverse events grade 3 or higher and attributable to study treatment
Time Frame: Up to 36 months after enrollment
Adverse events >= grade 3 and attributable to study treatment (possibly, probably, likely) will be reported by body system, severity and grade, and summarized by different levels of treatment exposure, per Common Terminology Criteria for Adverse Events (CTCAE) v.5.
Up to 36 months after enrollment

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Investigators

  • Principal Investigator: Zachery Reichert, MD, PhD, University of Michigan Rogel Cancer Center

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

May 28, 2021

Primary Completion (Estimated)

May 1, 2025

Study Completion (Estimated)

May 1, 2025

Study Registration Dates

First Submitted

February 5, 2021

First Submitted That Met QC Criteria

February 9, 2021

First Posted (Actual)

February 10, 2021

Study Record Updates

Last Update Posted (Actual)

September 28, 2023

Last Update Submitted That Met QC Criteria

September 25, 2023

Last Verified

September 1, 2023

More Information

Terms related to this study

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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