Recruiting
Phase 2

BAT & RAD

Sponsor:

Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins

Code:

NCT04704505

Conditions

Prostate Adenocarcinoma

Metastatic Prostate Adenocarcinoma

Castration-resistant

Eligibility Criteria

Sex: Male

Age: 18+

Healthy Volunteers: Accepted

Interventions

radium-223

Bipolar Androgen Therapy (BAT)

Study Details

Brief summary:

This is a single-arm, multicenter open label, international, phase II study of Bipolar Androgen Therapy (BAT) plus Radium-223 (RAD) in men with metastatic castration-resistant prostate cancer (mCRPC). Men with mCRPC with progressive disease (radiographically and/or biochemically) who have been treated with gonadotropin-releasing hormone (GnRH)-analogue (LHRH agonists/antagonists) continuously or bilateral orchidectomy will be enrolled in this study. Previous antiandrogen therapies are permitted, but no more than one (such as abiraterone, enzalutamide, apalutamide, darolutamide). All patients will receive treatment with Radium-223 at a dose of 55 Kilobecquerel (kBq) per kilogram of body weight IV every 28 days, for 6 cycles, plus Testosterone Cypionate 400mg Intramuscular (IM) every 28 days, until progression or unacceptable toxicity.

Conditions

Prostate Adenocarcinoma

Metastatic Prostate Adenocarcinoma

Castration-resistant

Study ID

NCT04704505

Start date

Apr 28, 2022

Status verified date

Feb, 2026

Completion date

Feb, 2029

Anticipated

Primary completion date

Feb, 2028

Anticipated

Eligibility Criteria

Eligibility Criteria

Sex: Male

Age: 18+

Healthy Volunteers: Accepted

Inclusion Criteria:

  • Histologically documented adenocarcinoma of the prostate confirmed by pathology report from prostate biopsy or a radical prostatectomy specimen. If prostatic tumor is of mixed histology, > 50% of the tumor must be adenocarcinoma.
  • Bone metastases as manifested by one or more lesions on a Technetium 99m bone scan performed within 2 months of screening
  • Castrate-resistant prostate cancer, in the setting of castrate levels of testosterone (≤ 50 ng/dL), defined as current or historical evidence of disease progression concomitant with surgical castration or androgen deprivation therapy (ADT), as demonstrated by two consecutive rises in PSA OR new lesions on bone scan:
  • PSA progression will be defined as 2 rising PSA values compared to a reference value, measured at least 7 days apart and the second value is ≥ 2 ng/mL. Appearance of one or more new areas of abnormal uptake on bone scan when compared to imaging studies acquired during castration therapy or against the precastration studies if there was no response. Increased uptake of pre-existing lesions on bone scan does not constitute progression. It must be documented within 8 weeks of screening Documented bone lesions by the appearance of ≥ 2 new lesions by bone scintigraphy or dimensionally measurable soft tissue metastatic lesion assessed by CT or MRI.
  • Serum PSA ≥ 2.0 ng/mL
  • Patients must be on bone health agents, either zoledronic acid or denosumab, for at least 4 weeks before enrollment. These treatments must then be continued during the study.
  • Screening Eastern Cooperative Oncology Group (ECOG) performance status ≤ 1
  • Asymptomatic or minimally symptomatic disease (no opioids)
  • Prior treatment with no more than one novel AR targeted drug (abiraterone, enzalutamide, darolutamide or apalutamide) is permitted, but not required. Prior first-generation AR targeted therapies such as bicalutamide or nilutamide are permitted as previous therapy and does not count as novel AR targeted therapy.
  • Prior chemotherapy for hormone-sensitive prostate cancer (given ≥ 12 months prior to study entry) is allowed, but not necessary.
  • Adequate bone marrow, renal and liver function (Absolute Neutrophil count > 1,000, Platelets >100,000, Hemoglobin ≥ 9g/dL aspartate aminotransferase/ alanine amino transferase (AST)/(ALT) within normal limits (WNL); Total Bilirubin WNL.
  • No evidence (within 5 years) of prior malignancies (except successfully treated basal cell or squamous cell carcinoma of the skin).
  • All patients must have tissue for genomic analysis. A biopsy of a metastatic site may be done during the screening; however, archive tissue will be allowed. Prostate tissue from prostate biopsy will be allowed.

Exclusion Criteria:

  • The presence of known visceral metastasis, including lung, liver and brain metastases.
  • Spinal cord compression, imminent long bone fracture, or any other condition that, in the opinion of the investigator, is likely to require radiation therapy and/or steroids for pain control during the active phase.
  • Previous treatment with chemotherapy for mCRPC, or chemotherapy for any reason within 12 months prior to registration. (Chemotherapy in the adjuvant setting or for hormone-sensitive prostate cancer is permitted, as long as it was completed more than 6 months before registration).
  • History of radiation therapy, either via external beam or brachytherapy within 28 days prior to registration.
  • Systemic therapy with strontium-89, samarium-153, rhenium-186 or rhenium-188 for the treatment of bony metastases within previous 24 weeks
  • Use of opioid analgesics for cancer-related pain such as oxycodone, morphine or methadone. Weak opioid analgesics such as codeine or tramadol are permitted.
  • Use of experimental drug within 4 weeks of treatment.
  • Patients with an intact prostate AND urinary obstructive symptoms are excluded (which includes patients with urinary symptoms from benign prostatic hyperplasia (BPH).
  • Patients receiving anticoagulation therapy with warfarin are not eligible for study. Patients on other anticoagulants such as rivaroxaban, dabigatran, apixaban are permitted.
  • Symptomatic nodal disease, i.e. scrotal, penile or leg edema.
  • Poor medical risk due to a serious, uncontrolled medical disorder, non-malignant systemic disease, or active, uncontrolled infection or a disease that may compromise safety. Examples include, but are not limited to, diabetes, heart failure, chronic obstructive pulmonary disease (COPD), ulcerative colitis, or Crohn's disease, Paget's disease, ventricular arrhythmia, recent (within 12 months) myocardial infarction, thromboembolic events or any psychiatric disorder that prohibits obtaining informed consent. Any medical intervention, any other condition, or any other circumstance which, in the opinion of the investigator, could compromise adherence with study requirements or otherwise compromise the study's objectives.
  • Evidence of disease in sites or extent that, in the opinion of the investigator, would put the patient at risk from therapy with testosterone (e.g. femoral metastases with concern over fracture risk, severe and extensive spinal metastases with concern over spinal cord compression, etc). Patients with low volume visceral metastasis are permitted at the discretion of the investigator, however bone disease must be predominant.

Study Design

Enrollment

47 participants

Anticipated

Intervention Model

Single group

Primary purpose

Treatment

Interventions and Outcome Measures

Arms

experimental: Bipolar Androgen Therapy in addition to RADium-223 (RAD)

Participants will receive Bipolar Androgen Therapy (BAT) plus Radium-223 (RAD).

Interventions

radium-223

Radium-223 is an alpha-particle-emitting bone-targeted therapy. All patients will receive Treatment with Radium-223 at a dose of 55 kBq per kilogram of body weight IV every 28 days, for 6 cycles,

Bipolar Androgen Therapy (BAT)

All Patients will receiveTestosterone Cypionate 400mg IM every 28 days, until progression or unacceptable toxicity.

Primary outcome measure

  • Radiographic progression-free survival (rPFS) of BAT-RAD [ Time Frame: 24 months ]

Central Contacts and Locations

Central contacts

Rana Sullivan, RN

410-614-6337ProstateCancerClinicalTrials@live.johnshopkins.edu

Amber Michalik, BA

667-306-8336ProstateCancerClinicalTrials@live.johnshopkins.edu

Locations

Amber Michalik

Recruiting

Baltimore, Maryland, United States, 20707

Contacts

Amber Michalik, BA

667-306-8336amichal2@jhmi.edu

More Information

Sponsor

Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins

Last update posted

Feb 6, 2026

Last verified

Feb, 2026

Trial information was received from ClinicalTrials.gov and was last updated on 2026-09-10. This information was provided to ClinicalTrials.gov by Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins on 2026-02-06.