Clinical trial Recruiting at 4 sites Phase 1 Interventional Ages 18 and up Men only

JUR-003 in adults with advanced prostate cancer

Official title: A Phase 1a/1b Open Label, Multicenter, Dose Escalation and Dose Expansion Study of the Safety, Pharmacokinetics, Pharmacodynamics, and Activity of JUR-003 in Adult Patients With Metastatic Prostate Cancer

Run by TCG Labs Soleil · NCT07824349 · Data updated 2026-11-12

This first-in-human study tests JUR-003 to see if it is safe and tolerable and to get an early sense of activity in adults with metastatic or advanced prostate cancer.

Quick facts

PhasePhase 1
Study typeInterventional
Ages18 Years and up
SexMen only
Enrollment210 (estimated)
SponsorTCG Labs Soleil
Industry-sponsored
Drugs / interventionsimmunotherapy
Locations4 sites (Grand Rapids, Michigan and 3 other locations)
StatusRecruiting
StartedOctober 26, 2026
Main results expectedJune 2030
Study endsJune 2030
Registry record updatedNovember 4, 2026
Trial IDNCT07824349 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults (18+ years) with histologically or cytologically confirmed prostate adenocarcinoma, with measurable or evaluable disease; Part 2.1B expansion includes PSMA-avid disease by PSMA-PET in the setting of biochemical recurrence.

Probably not a fit

Patients with advanced disease who do not respond to JUR-003 or who experience intolerable toxicity may derive no direct benefit.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

JUR-003-ONC-101 is a two-part, open-label, multicenter Phase 1a/1b trial in adults with advanced prostate cancer. The study first progresses through a dose-escalation phase to identify tolerable doses, followed by a dose-expansion phase to further evaluate safety and initial anti-tumor signals. Participants have measurable or evaluable disease and may include patients with oligometastatic disease; PSMA-PET criteria are used for a specific expansion cohort. Key safety, pharmacokinetic, pharmacodynamic, and preliminary activity data will guide future development. Enrollment occurs at selected sites in the Midwest, New York, and Tennessee.

Why it matters

Potential benefit: If successful, JUR-003 could provide a new treatment option and help guide dosing for future studies in metastatic prostate cancer.

How similar studies have gone: Early-phase studies of similar targeted therapies in prostate cancer have shown safety signals and hints of activity, supporting continuation into expansion cohorts.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Must be ≥18 years of age at the time the informed consent form (ICF) is signed.
* Has a histologically or cytologically confirmed adenocarcinoma of the prostate.
* Has either of the following:

  1. Measurable disease per RECIST v1.1 (with PCWG3 modifications)
  2. Evaluable disease per PCWG4, as assessed by the local site Investigator/radiology
  3. For Part 2.1B (omPC expansion) only: PSMA-avid disease on PSMA-PET, defined as lesion(s) demonstrating uptake above blood pool (PSMA score ≥1) and assessed by the Investigator as consistent with metastatic prostate cancer, in the setting of biochemical recurrence (PSA ≥0.2 ng/mL).

Exclusion Criteria:

* Has a diagnosis of immunodeficiency.
* Has had a prior stem cell, bone marrow, or organ transplant.
* Has a known history of human immunodeficiency virus (HIV) infection.
* Has active or chronic hepatitis B virus (HBV), or hepatitis C virus (HCV) infection.
* Has an active autoimmune disease (non-immunotherapy induced conditions) that has required systemic treatment in the past 2 years (ie, with use of disease modifying agents, corticosteroids, or immunosuppressive drugs).
* Has a history of (noninfectious) pneumonitis that required steroids or current active organizing pneumonitis/interstitial lung disease.
* Has known active central nervous system (CNS) metastases and/or carcinomatous meningitis. Individuals with previously treated CNS metastases may participate in JUR-003 monotherapy cohorts (Parts 1.1, 2.1, and 1.3 where applicable) provided they are radiologically stable (ie, without evidence of progression for at least 2 weeks by repeat imaging \[note that the repeat imaging should be performed during study Screening\]), clinically stable, and without requirement of steroid treatment for at least 14 days prior to first dose of study drug.
* Has untreated spinal cord compression. Individuals must be neurologically stable off steroids for at least 4 weeks prior to first dose of study drug.
* Has a history of a previous secondary malignancy within 3 years of Screening (except basal cell or squamous cell carcinoma of the skin or carcinoma in situ treated with curative therapy or other localized, low-grade tumors deemed cured, or whose natural history does not have the potential to interfere with the safety or efficacy assessments of the current study and not treated with systemic anticancer therapy \[except hormonal therapy\]).
* Has a known psychiatric or substance abuse disorder that would interfere with the individuals' ability to cooperate with the requirements of the study.
* Has a history of venous thromboembolic events (eg, pulmonary embolism) within 1 month prior to the first dose of JUR-003. Uncomplicated (Grade ≤2) deep vein thrombosis is not considered exclusionary.

Where it's running

  • START Midwest
    Grand Rapids, Michigan, United States
    Recruiting
  • START New York
    Lake Success, New York, United States
    Recruiting
  • SCRI Oncology Partners
    Nashville, Tennessee, United States
    Recruiting
  • START San Antonio
    San Antonio, Texas, United States
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.