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NCT06039371 · University of Washington

Supraphysiological Androgen to Enhance Treatment Activity in Metastatic Castration-Resistant Prostate Cancer, SPECTRA Study

What this study is about

This phase II trial studies how well giving testosterone at levels higher than normally found in the body (supraphysiological) works to enhance chemotherapy treatment, and Lutetium 177Lu-prostate specific-membrane antigen (PSMA)-617 (LuPSMA) in patients with prostate cancer that has progressed despite being previously treated with androgen therapies and has spread from where it first started (prostate) to other places in the body (metastatic castration-resistant prostate cancer). In patients that have developed progressive cancer in spite of standard hormonal treatment, administering supraphysiological testosterone may result in regression of tumors by causing deoxyribonucleic acid (DNA) damage in tumor cells that have adapted to low testosterone conditions. Carboplatin is in a class of medications known as platinum-containing compounds. Carboplatin works by killing, stopping or slowing the growth of tumor cells. Etoposide is in a class of medications known as podophyllotoxin derivatives. It blocks a certain enzyme needed for cell division and DNA repair and may kill tumor cells. Radioactive drugs, such as LuPSMA, may carry radiation directly to tumor cells and not harm normal cells. Giving supraphysiological levels of testosterone and carboplatin or etoposide or LuPSMA together may be an effective treatment for metastatic castration-resistant prostate cancer.

View original scientific description

This phase II trial studies how well giving testosterone at levels higher than normally found in the body (supraphysiological) works to enhance chemotherapy treatment, and Lutetium 177Lu-prostate specific-membrane antigen (PSMA)-617 (LuPSMA) in patients with prostate cancer that has progressed despite being previously treated with androgen therapies and has spread from where it first started (prostate) to other places in the body (metastatic castration-resistant prostate cancer). In patients that have developed progressive cancer in spite of standard hormonal treatment, administering supraphysiological testosterone may result in regression of tumors by causing deoxyribonucleic acid (DNA) damage in tumor cells that have adapted to low testosterone conditions. Carboplatin is in a class of medications known as platinum-containing compounds. Carboplatin works by killing, stopping or slowing the growth of tumor cells. Etoposide is in a class of medications known as podophyllotoxin derivatives. It blocks a certain enzyme needed for cell division and DNA repair and may kill tumor cells. Radioactive drugs, such as LuPSMA, may carry radiation directly to tumor cells and not harm normal cells. Giving supraphysiological levels of testosterone and carboplatin or etoposide or LuPSMA together may be an effective treatment for metastatic castration-resistant prostate cancer.

Interventions

PROCEDURE

Biopsy Procedure

Undergo a biopsy

PROCEDURE

Biospecimen Collection

Undergo blood sample collection

PROCEDURE

Bone Scan

Undergo bone scan

DRUG

Carboplatin

Given IV

PROCEDURE

Computed Tomography

Undergo CT

DRUG

Etoposide

Given PO

OTHER

Quality-of-Life Assessment

Ancillary studies

OTHER

Questionnaire Administration

Ancillary studies

DRUG

Testosterone Cypionate

Given IM

OTHER

Radioconjugate

Given LuPSMA IV

PROCEDURE

Dual X-ray Absorptiometry

Undergo DEXA

OTHER

Gallium Ga 68-PSMA-617

Given gallium 68Ga-PSMA-617

PROCEDURE

Positron Emission Tomography

Undergo 68Ga-PSMA PET

PROCEDURE

Single Photon Emission Computed Tomography

Undergo SPECT/CT

Primary outcome measures

Greater than or equal to 50% decline in prostate-specific antigen from baseline (PSA50) response rate

Time frame: From baseline up to 3 years

Will assess \>= 50% decline in PSA following treatment with combination bipolar androgen therapy (BAT) and genotoxic chemotherapy (at least 12 weeks of total therapy). Will be calculated as the percentage with 95% confidence interval (CI) of the total number of subjects that achieved a PSA50 response.

Who can participate

This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.

Inclusion criteria

  • Must be willing to provide informed consent prior to any study specific procedures
  • Age \>= 18 years
  • Documented histologically confirmed adenocarcinoma of the prostate
  • Patient must have evidence of castration resistant prostate cancer as evidenced by PSA progression (per Prostate Cancer Working Group 3 \[PCWG3\] criteria) and a castrate serum testosterone level (i.e., =\< 50 mg/dL)
  • PSA must be at least 2 ng/ml and rising on two successive measurements at least two weeks apart
  • Patients must have progressed on at least one prior next-generation androgen receptor-signalling inhibitor (e.g., abiraterone, enzalutamide, etc.). There must be at least a 2-week washout period after stopping the most recent approved therapy for metastatic castration-resistant prostate cancer (mCRPC) (e.g., abiraterone, enzalutamide, Ra-223, sipuleucel-t) prior to cycle 1, day 1. If applicable, patients should be weaned off steroids at least 1 week prior to starting treatment
  • Subjects enrolling to Cohort 3 must demonstrate evidence of PSMA expression on 68Ga-PSMA-11 PET as defined in the VISION trial
  • No prior chemotherapy for the treatment of mCRPC. Patients may have received docetaxel for the treatment of hormone-sensitive prostate cancer
  • Prior treatment with non-chemotherapy investigational agents is permitted. There must be at least a 2-week washout period after stopping any investigational cancer agent prior to cycle 1, day 1
  • Hemoglobin \>= 9 g/dL with no blood transfusion in the past 28 days (within 30 days prior to administration of study treatment)
  • Absolute neutrophil count (ANC) \>= 1.5 x 10\^9/L (within 30 days prior to administration of study treatment)
  • Platelet count \>= 100 x 10\^9/L (within 30 days prior to administration of study treatment)
  • Total bilirubin =\< 1.5 x institutional upper limit of normal (ULN) (within 30 days prior to administration of study treatment)
  • Aspartate aminotransferase (AST) (serum glutamic oxaloacetic transaminase \[SGOT\]) / alanine aminotransferase (ALT) (serum glutamic pyruvate transaminase \[SGPT\]) =\< 2.5 x institutional upper limit of normal unless liver metastases are present in which case they must be =\< 5x ULN (within 30 days prior to administration of study treatment)
  • Patients must have creatinine clearance estimated using the Cockcroft-Gault equation or based on 24 hour urine test of \>= 51 mL/min (within 30 days prior to administration of study treatment)
  • Eastern Cooperative Oncology Group (ECOG) performance status =\< 2
  • Patients must have a life expectancy \>= 16 weeks
  • Patient is willing and able to comply with the protocol for the duration of the study including undergoing treatment and scheduled visits and examinations
  • At least one lesion (measurable and/or non-measurable) that can be accurately assessed at baseline by CT, positron emission tomography (PET), magnetic resonance imaging (MRI) and/or bone scan and is suitable for repeated assessment
  • Must be willing to undergo metastatic biopsy and have a lesion amenable for biopsy
  • Male patients and their partners, who are sexually active and of childbearing potential, must agree to the use of two highly effective forms of contraception in combination, throughout the period of taking study treatment and for 6 months after last dose of study drug(s) to prevent pregnancy in a partner

Exclusion criteria

  • Involvement in the planning and/or conduct of the study
  • Other malignancy unless curatively treated with no evidence of disease for \>= 2 years except: adequately treated non-melanoma skin cancer, non-muscle invasive bladder cancer
  • Persistent toxicities (Common Terminology Criteria for Adverse Event (CTCAE) grade \> 2) caused by previous cancer therapy, excluding alopecia
  • Patients with symptomatic uncontrolled brain metastases. A scan to confirm the absence of brain metastases is not required. Patients with spinal cord compression unless considered to have received definitive treatment for this and evidence of clinically stable disease for 28 days
  • Use of corticosteroids at a dose equivalent to \> 10 mg of prednisone daily
  • Planning to receive concurrent treatment with another systemic cancer therapy, aside from a luteinizing hormone releasing hormone (LHRH) analogue
  • Use of warfarin is not permitted. Low-molecular weight heparin and direct oral anticoagulants are allowed, but their use should be discussed with the principal investigator (PI) first
  • Major surgery within 2 weeks of starting study treatment and patients must have recovered from any effects of any major surgery
  • Patients considered a poor medical risk due to a serious, uncontrolled medical disorder, non-malignant systemic disease or active, uncontrolled infection. Examples include, but are not limited to, uncontrolled ventricular arrhythmia, uncontrolled major seizure disorder, uncontrolled hypertension (blood pressure \[BP\] \>= 165/100), history of prior stroke, unstable spinal cord compression, superior vena cava syndrome, extensive interstitial bilateral lung disease or any psychiatric disorder that prohibits obtaining informed consent
  • Patients with a known hypersensitivity to the testosterone cypionate, etoposide, carboplatin or any of the excipients of these products
  • Patients with known active hepatitis (i.e., hepatitis B or C) due to risk of transmitting the infection through blood or other body fluids
  • Evidence of serious and/or unstable pre-existing medical, psychiatric or other condition (including laboratory abnormalities) that could interfere with patient safety or provision of informed consent to participate in this study
  • Any psychological, familial, sociological, or geographical condition that could potentially interfere with compliance with the study protocol and follow-up schedule
  • Evidence of disease that, in the opinion of the investigator, would put the patient at risk from testosterone therapy (e.g. femoral metastases with concern over fracture risk, spinal metastases with concern over spinal cord compression, lymph node disease with concern for ureteral obstruction)
  • Patients with pain attributable to their prostate cancer.
  • Excluded due to concern for pain flare due to testosterone supplementation
  • Tumor causing urinary outlet obstruction that requires catheterization for voiding. Patients that require catheterization to void secondary to benign strictures or other non-cancer causes will be permitted to enroll. Patients with percutaneous nephrostomy tubes will also be permitted to enroll
  • Prior history of deep venous thrombosis or pulmonary embolism within 5 years prior to enrollment in the study and not currently on systemic anticoagulation.
  • Excluded due to risk of venous thromboembolism from hormone supplementation
  • Patients with NYHA (New York Heart Association) class III or IV heart failure or history of a prior myocardial infarction (MI) within 5 years of enrollment to the study.
  • Excluded due to increased risk of cardiovascular events with testosterone supplementation

Where

  • Seattle, Washington

Collaborators

National Cancer Institute (NCI)

Related conditions & keywords

Castration-Resistant Prostate CarcinomaMetastatic Prostate AdenocarcinomaStage IVB Prostate Cancer AJCC v8

Frequently asked questions

What is a clinical trial?

A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.

Is it safe to participate?

Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.

Will I be compensated?

Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.

Will I receive a placebo instead of treatment?

When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.

Can I leave a trial if I change my mind?

Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.

How long does a clinical trial last?

Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.

Data: ClinicalTrials.gov · synced Jan 14, 2026 · Source of record for eligibility and locations

📊
1 of 69 participants interested
1% interest

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RECRUITING

Seattle

Washington

Location available

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What participation can include

  • Study-related care provided by the research team
  • Close monitoring by medical professionals
  • Possible compensation for time and travel*
  • The option to withdraw at any time
  • Contributing to medical research that may help future patients

*Compensation varies by study. Confirm details with coordinator.

Typical next steps

  1. 1.Submit this form
  2. 2.Phone screening
  3. 3.In-person assessment if eligible
  4. 4.Begin participation

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Looking for Castration-Resistant Prostate Carcinoma Treatment in Seattle?

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Castration-Resistant Prostate Carcinoma Treatment Options in Seattle, Washington

If you're searching for Castration-Resistant Prostate Carcinoma treatment in Seattle, participating in a clinical research study may provide access to innovative approaches under expert medical supervision. This study is actively recruiting participants in Seattle and surrounding areas.

Clinical trials offer participants the opportunity to receive cutting-edge treatments while contributing to medical research that may help future patients with Castration-Resistant Prostate Carcinoma. All study-related care is provided at no cost to participants.

Local Sites
1 locations in Washington
Now Enrolling
Up to 69 participants
Quick Start
Screening available now

Why Consider a Clinical Trial for Castration-Resistant Prostate Carcinoma?

Potential Benefits

  • Access to new treatment approaches before public availability
  • Close monitoring by experienced medical professionals
  • Study-related care provided at no cost
  • Contribute to medical research for Castration-Resistant Prostate Carcinoma

What to Expect

  • Initial screening to determine eligibility
  • Regular check-ups and monitoring visits
  • Possible compensation for time and travel
  • You can withdraw at any time

Frequently Asked Questions About This Castration-Resistant Prostate Carcinoma Study

Important Clinical Trial Information

This information is provided for educational purposes and does not constitute medical advice. Clinical trial participation involves potential risks and benefits. Eligibility requirements apply and will be assessed during the screening process.

Study identifier: NCT06039371. For complete study details, visit ClinicalTrials.gov. Always consult with your healthcare provider before making decisions about your medical care or participating in clinical research.