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New Immune-Boosting drug combo targets Hard-to-Treat cancers

NCT ID NCT07594106

Disease control Sponsor: Regeneron Pharmaceuticals Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Sep 11, 2026 · Updated 3 times

Summary

This early-stage trial tests a new drug, REGN15505, alone or with other drugs, in adults with advanced prostate or kidney cancer that has spread. The goal is to help the immune system attack cancer cells. About 265 participants will be enrolled to check safety, side effects, and how well the treatment works.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 1/2

Runs two stages together: safety and dose first, then whether the treatment works.

Participants

About 265 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jul 2026

Expected to finish

Oct 2030

An estimate. End dates often move.

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Key Inclusion Criteria: Participants with mCRPC: 1. Men with histologically or cytologically confirmed adenocarcinoma of the prostate without pure small cell carcinoma 2. mCRPC with PSA value at screening ≥4 ng/mL and that has progressed within 6 months prior to screening as described in the protocol 3. Has received ≥2 lines of prior systemic therapy approved in the metastatic and/or castration-resistant setting as described in the protocol 4. Have had either Orchiectomy or be on Luteinizing Hormone-Releasing Hormone (LHRH) agonist or antagonist therapy with serum testosterone \<50 ng/dL AND agree to stay on LHRH agonist or antagonist therapy during the study Participants with ccRCC: 5. Men and women with histologically or cytologically confirmed Renal Cell Carcinoma (RCC) with a clear-cell component 6. Diagnosis of metastatic ccRCC with at least 1 measurable lesion via Response evaluation criteria in solid tumors (RECIST) 1.1 criteria 7. Has progressed on or after ≥1 line of prior systemic therapy approved in the metastatic setting. Prior treatment must include an Anti Program Cell Death 1 (PD-1)/ Program Death Ligand 1 (PD-L1) therapy and either ipilimumab and/or a Tyrosine Kinase Inhibitor (TKI) Key Exclusion Criteria: For Both mCRPC and ccRCC Cohorts: 1. Has received treatment with an approved systemic therapy (including sipuleucel-T for mCRPC patients) within 3 weeks of dosing or has not yet recovered (ie, grade ≤1 or baseline) from any acute toxicities except for laboratory changes as described in the protocol mCRPC Cohort Only: 2. Has received prior Prostate Specific Membrane Antigen (PSMA)-targeting therapy with the exception of a PSMA-targeting radioligand (eg, 177Lu-PSMA-617) Note: Other protocol defined inclusion/exclusion criteria apply

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Conditions

The condition(s) this trial relates to.

castration-resistant prostate carcinoma clear cell renal carcinoma metastatic prostate carcinoma nonpapillary renal cell carcinoma renal cell carcinoma

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Clear cell renal cell carcinoma (CCRCC) Metastatic castration-resistant prostate cancer (MCRPC)

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    5 sites. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • City of Hope

    RECRUITING

    Duarte, California, 91010, United States

  • City of Hope Chicago, City of Hope Cancer Center Chicago

    RECRUITING

    Zion, Illinois, 60099, United States

  • City of Hope Phoenix

    RECRUITING

    Goodyear, Arizona, 85338, United States

  • H. Lee Moffitt Cancer Center

    RECRUITING

    Tampa, Florida, 33612, United States

  • The University of Texas MD Anderson Cancer Center

    RECRUITING

    Houston, Texas, 77030, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.