JUR-003 in Adult Patients With Metastatic Prostate Cancer

November 3, 2026 updated by: Juri Biosciences, Inc.

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

JUR-003-ONC-101 is a first-in-human Phase 1a/1b open-label, multicenter study to evaluate the safety, tolerability, PK, pharmacodynamics, and preliminary anti-tumor activity of JUR-003 in patients with prostate cancer. This study is divided into 2 parts: Phase-1a Dose Escalation (Part 1), and Phase-1b Dose Expansion (Part 2). In each part, patients who meet specific eligibility criteria will be enrolled.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
210

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • United States
    • Michigan
      • Grand Rapids, Michigan, United States, 49546
        • Recruiting
        • START Midwest
    • New York
      • Lake Success, New York, United States, 11042
        • Recruiting
        • START New York
    • Tennessee
      • Nashville, Tennessee, United States, 37203
        • Recruiting
        • SCRI Oncology Partners
    • Texas
      • San Antonio, Texas, United States, 78229
        • Recruiting
        • START San Antonio

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

Male

Description

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.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Non-Randomized
  • Interventional Model: Sequential Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Part 1 (Dose Escalation)

Participants will receive JUR-003 to determine the recommended dose for expansion (RDE) regimen.
Biological: JUR-003

JUR-003 will be administered intravenously.
Experimental: Part 2 (Dose Expansion)

Participants will receive JUR-003 at the RDE as determined in Part 1 of the study to confirm the safety and anti-tumor activity.
Biological: JUR-003

JUR-003 will be administered intravenously.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Safety and Tolerability
Time Frame: 2 years

The safety and tolerability of JUR-003 in patients with prostate cancer measured by frequency and severity of treatment-emergent adverse events (TEAEs), serious adverse events (SAEs), dose-limiting toxicities (DLTs), adverse events of special interest (AESIs), adverse events (AEs) leading to dose interruption and of adverse events (AEs) leading to treatment discontinuation
2 years
Determine Recommended Dose for Expansion
Time Frame: 1 year

To determine the maximum tolerated dose (MTD) and/or select the recommended dose(s) for expansion (RDE[s]) of JUR-003
1 year
Characterize Pharmacokinetics
Time Frame: 2 years

To characterize the pharmacokinetics (PK) of JUR-003 with Cmax following administration
2 years

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Juri Biosciences, Inc.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
October 26, 2026

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
June 1, 2030

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
June 1, 2030

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
September 11, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
September 11, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
September 17, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
November 4, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
November 3, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
July 1, 2026

More Information

Terms related to this study

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • JUR-003-ONC-101

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Cookie Settings

We use cookies to ensure that we give you the best experience on our website. For more details carefully read our Privacy and Cookies Policy. ...>>>You can change your preferences or withdraw your consent at any time by deleting the cookies from your website or computer as described in the policy. Please accept it and choose your preferences by ticking the corresponding boxes in the "Manage Settings" section below. Please carefully read our Terms of Service before you proceed with using any part of this website.
«Manage Settings