Clinical trial Recruiting at 6 sites Phase 1 Interventional Ages 18 and up Men only

JANX014 for metastatic castration-resistant prostate cancer

Official title: A Phase 1 Open-Label, Multicenter Study of JANX014 in Participants With Prostate Cancer

Run by Janux Therapeutics · NCT07545811 · Data updated 2026-11-12

This trial will test whether JANX014 is safe, how your body handles it, and whether it shows signs of benefit in adults with metastatic castration-resistant prostate cancer who have already had anti-androgen therapy and typically a taxane.

Quick facts

PhasePhase 1
Study typeInterventional
Ages18 Years and up
SexMen only
Enrollment43 (estimated)
SponsorJanux Therapeutics
Industry-sponsored
Drugs / interventionsCAR-T
Locations6 sites (La Jolla, California and 5 other locations)
StatusRecruiting
StartedApril 15, 2026
Main results expectedMay 2028
Study endsMarch 2029
Registry record updatedSeptember 3, 2026
Trial IDNCT07545811 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Men aged 18 or older with histologically confirmed metastatic castration-resistant prostate cancer who progressed after at least one novel anti-androgen and typically one taxane regimen (or who refused/are ineligible for taxane) with adequate organ function are the intended candidates.

Probably not a fit

Patients with prior CAR-T or approved/investigational T-cell engager therapy, prior radioligand therapy, prior solid organ transplant, or clinically significant cardiovascular disease are excluded and therefore unlikely to benefit from participating.

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

What this trial studies

This first-in-human, open-label Phase 1 study gives JANX014 to adults with metastatic castration-resistant prostate cancer to define safety, tolerability, pharmacokinetics, pharmacodynamics, and preliminary signs of anti-tumor activity. The study uses a dose-escalation phase to identify a tolerable dose and a dose-expansion phase to further characterize safety and early efficacy signals. Eligible participants generally must have progressed after at least one novel anti-androgen and typically a prior taxane regimen, although those who refused or cannot receive taxane may qualify. The trial excludes patients with prior CAR-T or T-cell engager therapy, prior radioligand therapy, prior solid organ transplant, or significant cardiovascular disease and is conducted at a research site in Nashville, Tennessee.

Why it matters

Potential benefit: If successful, JANX014 could offer a new treatment option that slows disease progression for some men with advanced castration-resistant prostate cancer who have limited options.

How similar studies have gone: This is a first-in-human trial of JANX014, and while other immune- or cell-based approaches in prostate cancer have shown limited early signals, there is no established precedent of a broadly effective immune cure in mCRPC.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Male ≥18 years of age at the time of signing informed consent
* Histologically or cytologically confirmed adenocarcinoma of the prostate
* For Dose Escalation: Having mCRPC that progressed after at least one novel anti-androgen therapy and at least one taxane containing regimen. Participants who have actively refused a taxane containing regimen or are medically unsuitable to receive taxane are eligible.
* Adequate organ function
* For Dose Expansion Part: Have received ≤ 2 anti-androgen therapies in either the HSPC or CRPC setting and no more than 1 prior taxane regimen in the HSPC setting. Participants who have actively refused a taxane regimen or are medically unsuitable to receive taxane are eligible.

Exclusion Criteria:

* Prior solid organ transplant
* Prior treatment with any CAR-T cell therapy, approved or investigational T-cell engager therapy, and prior receipt of radioligand therapy
* Clinically significant cardiovascular disease

Where it's running

  • UC San Diego Moores Cancer Center
    La Jolla, California, United States
    Recruiting
  • Washington University School of Medicine
    St Louis, Missouri, United States
    Recruiting
  • Medical University of South Carolina - Hollings Cancer Center
    Charleston, South Carolina, United States
    Recruiting
  • Prisma Health Cancer Institute
    Greenville, South Carolina, United States
    Recruiting
  • SCRI Oncology Partners
    Nashville, Tennessee, United States
    Recruiting
  • SCRI at Mary Crowley
    Dallas, Texas, United States
    Recruiting

Study contacts

Similar studies

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

  • MRT-2359 plus apalutamide in advanced prostate cancer

    This Phase 2 trial tests whether taking MRT-2359 with apalutamide can lower PSA in men with castration-resistant prostate cancer.

    Recruiting at 7 sites Phase 2 Monte Rosa Therapeutics, Inc · Los Angeles, California and 13 other locations · NCT07745361

  • Docetaxel and SX-682 in head and neck cancers and prostate cancer

    This trial tests a new drug SX-682 together with docetaxel in adults whose head and neck cancers or prostate cancer have returned or spread.

    Recruiting Phase 1/2 National Institutes of Health Clinical Center (CC) · Bethesda, Maryland · NCT07667400

  • Actinium (225Ac) PSMA therapy for castration‑resistant prostate cancer after Lutetium

    This trial will test whether an injectable Actinium-225 PSMA treatment can control advanced prostate cancer in men whose disease progressed after Lutetium‑PSMA therapy.

    Recruiting Phase 1/2 University College, London · London · NCT07414940

  • A-CAR032 CAR-T therapy for metastatic castration-resistant prostate cancer

    This early-phase treatment will try A-CAR032, a CAR-T cell therapy, in adults with metastatic castration‑resistant prostate cancer who progressed after ARPI and are not eligible for standard treatment.

    Recruiting at 2 sites Phase 1 Shanghai AbelZeta Ltd. · Beijing, Beijing Municipality and 3 other locations · NCT07344311

  • ASP5541 with prednisone and ADT for Chinese men with prostate cancer

    This study tests whether giving ASP5541 together with prednisone and ongoing androgen-deprivation therapy is safe and how the medicine behaves in Chinese men with metastatic prostate cancer.

    Recruiting Phase 1 Astellas Pharma Inc · Beijing, Beijing Municipality · NCT07339267

  • Phase 2 test of ASP5541 for men with advanced prostate cancer

    This study will test whether an injectable form of abiraterone (ASP5541) is safe and works as well or better than the standard oral abiraterone for men with metastatic prostate cancer who are on hormone therapy, with or without prednisone.

    Recruiting at 54 sites Phase 2 Astellas Pharma Inc · Huntsville, Alabama and 53 other locations · NCT07005154

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.