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Cabazitaxel +/- Carboplatin vs 177Lu-PSMA-617 in Metastatic Castrate-resistant Prostate Cancer

  • PhasePhase 2
  • StatusRecruiting
  • Planned enrollment44 people
  • Recruiting US sites1
  • SponsorCase Comprehensive Cancer Center
  • RegistryNCT06738303

Recruitment re-checked on ClinicalTrials.gov Oct 30, 2026. Public record; not medical advice.

Cabazitaxel +/- Carboplatin vs 177Lu-PSMA-617 in Metastatic Castrate-resistant Prostate Cancer: a one-minute explainerNCT067383031 min

Eligibility

Who can join

The film gives the main points. The full list below is copied from the registry; the study team makes the final decision.

  • Age19 Years to no maximum
  • SexAll
  • Healthy volunteersNo

You may be able to join if

  • Participants must have histologically or cytologically confirmed adenocarcinoma of prostate
  • Evidence of metastatic castrate-resistant prostate cancer that has previously been treated with an androgen receptor pathway inhibitor. Prior docetaxel exposure is recommended but not mandatory. Tissue is not mandatory, but a pathologic report is required at time of enrollment.
  • Patients must have a PSMA-positive 18F-rhPSMA-7.3 performed within 12 weeks from C1D1 with ≥1 site with SUVmax ≥10. An alternative PSMA PET tracer is permitted at baseline if performed within 8 weeks prior to randomization.
  • Eligible patients have evidence of mCRPC who have progressed on prior novel hormonal agent(s) to include at least one of the following:
  • Baseline PSMA SUVmean <10 OR
  • ≥1 visceral metastasis OR
  • ≥5 bone metastases OR one of the following (using Next Generation Sequencing on file within 5 years)
  • TP53
  • PTEN
  • mutation.
  • Age > 18 years.
  • ECOG performance status of 0 to 2.
  • Participants must have adequate organ and marrow function as defined below to be suitable for the randomized treatment outlined in this
  • Absolute neutrophil count >1000/μL; platelet count >90 000/μL; hemoglobin >8.5 g/dL) at screening.
  • Note: Participants must not have received any growth factors within 7 days or blood transfusions within 14 days prior to the hematologic laboratory values obtained at screening).
  • Total bilirubin (TBIL) <2.5 × the upper limit of normal (ULN) at screening, except participants with documented Gilbert syndrome who must have a TBIL <3 mg/dL
  • Alanine aminotransferase (ALT) and aspartate aminotransferase (AST) < 5 ULN at screening
  • Creatinine clearance ≥40 mL/min and/or estimated glomerular filtration rate (eGFR) ≥30
  • Albumin >30 g/L (3.0 g/dL) at screening
  • Participants receiving bisphosphonates or other approved bone-targeting therapy (e.g., denosumab) must be on a stable dose for at least 14 days before the start of study treatment.
  • Participants of child-producing potential agree to use highly effective contraceptive methods (i.e., barrier contraception measures such as a male condom with spermicide during intercourse) and avoid sperm donation during the study treatment and for 3 months after the last dose of study treatment. A man is considered to be of child-producing potential, unless he has had a bilateral vasectomy with documented aspermia or a bilateral orchiectomy. Partners of patients must also practice approved forms of birth control
  • Participants must have the ability to understand and the willingness to sign a written informed consent form (ICF).
  • Members of all races and ethnic groups are eligible for this trial

You cannot join if

  • Evidence of hormone-sensitive prostate cancer (HSPC)
  • Evidence of small cell prostate cancer
  • Participants receiving any other investigational agents.
  • Diagnosis of another clinically significant malignancy within the previous 2 years other than curatively treated non-melanomatous skin cancer or superficial urothelial carcinoma and other in situ or noninvasive malignancies, as determined by the PI or Co-PI.
  • Participants with brain metastases/central nervous system (CNS) disease that are treated prior to enrollment will be allowed in this clinical trial.
  • Known or suspected significant hypersensitivity to any components of the formulation used for Cabazitaxel, carboplatin or 177Lu-PSMA-617.
  • Uncontrolled intercurrent illness, including but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations considered by the Investigator to limit compliance with study requirements.
  • Prior treatment toxicities not resolved to ≤ Grade 2 according to NCI CTCAE Version 5.0

The treatment

How it is intended to work

This is how the treatment is meant to work. Whether it helps, and how safe it is, is what this trial is testing.

cabazitaxel. A semi-synthetic derivative of the natural taxoid 10-deacetylbaccatin III with potential antineoplastic activity. Cabazitaxel binds to and stabilizes tubulin, resulting in the inhibition of microtubule depolymerization and cell division, cell cycle arrest in the G2/M phase, and the inhibition of tumor cell proliferation. Unlike other taxane compounds, this agent is a poor substrate for the membrane-associated, multidrug resistance (MDR), P-glycoprotein (P-gp) efflux pump and may be useful for treating multidrug-resistant tumors. In addition, cabazitaxel penetrates the blood-brain barrier (BBB). NCI Drug Dictionary

bevacizumab/carboplatin/paclitaxel regimen. A regimen consisting of bevacizumab, carboplatin and paclitaxel that can be used in the treatment of endometrial, ovarian, fallopian tube and primary peritoneal, vulvar and cervical cancers and non-small cell lung cancer (NSCLC). NCI Drug Dictionary

lutetium Lu 177 vipivotide tetraxetan. A radioconjugate composed of PSMA-617, a human prostate-specific membrane antigen (PSMA)-targeting ligand, conjugated to the beta-emitting radioisotope lutetium Lu 177 (177Lu), with potential antineoplastic activity against PSMA-expressing tumor cells. Upon intravenous administration of lutetium Lu 177 vipivotide tetraxetan, vipivotide tetraxetan targets and binds to PSMA-expressing tumor cells. Upon binding, PSMA-expressing tumor cells are destroyed by 177Lu through the specific delivery of beta particle radiation. PSMA, a tumor-associated antigen and type II transmembrane protein, is expressed on the membrane of prostatic epithelial cells and overexpressed on prostate tumor cells. NCI Drug Dictionary

Treatments listed in the registry

  • Cabazitaxel and carboplatin (Drug): Given IV
  • Lu-PSMA-617 (Drug): Given IV

The study

Treatment groups

Randomized · Parallel · masking: None

Arm 1: Cabazitaxel and carboplatin (Experimental)

Cabazitaxel: Participants will receive cabazitaxel 20 mg/m2 as a one-hour intravenous infusion every three weeks for a total of 10 cycles or until disease progression, unacceptable toxicity. Carboplatin: Participants will receive carboplatin AUC 4 mg/mL/min every three weeks for a total of 10 cycles or until disease progression, unacceptable toxicity

Arm 2: Lu-PSMA-617 (Experimental)

Participants will receive 177Lu-PSMA-617 7.4 GBq IV on Day 1 (+/-1 week) of each 6-week cycle for up to 6 cycles or until disease progression, unacceptable toxicity

Goals

What the study measures

Main goals

  • PSA response rate as assessed by the change in PSA ratio (Baseline, 12 weeks post intervention)

Other goals

  • Progression Free Survival
  • Time to next systemic therapy

Planned enrollment: 44 (estimated).

Where

Recruiting US sites

  • Case Comprehensive Cancer Center, University Hospitals Cleveland Medical Center Seidman Cancer Center, Cleveland Clinic Taussig Cancer Center, Cleveland, Ohio

Site status as of Oct 30, 2026. Check the live record before contacting a site.

Sources

Where this comes from

Registry record reviewed as fetched Oct 30, 2026, last updated by the sponsor Oct 1, 2026. Public record; not medical advice.

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