New hope for advanced prostate cancer? early trial tests targeted combo therapy
NCT ID NCT05818683
First seen Jun 27, 2026 · Last updated Aug 28, 2026 · Updated 3 times
Summary
This early-phase study is testing a new drug called pasritamig (JNJ-78278343) combined with other treatments for men with metastatic prostate cancer that no longer responds to hormone therapy. The goal is to find the safest and most effective dose. About 300 participants will be enrolled to monitor side effects and see if the combination can shrink tumors or lower PSA levels.
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
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Phase 1
The first testing in people. Mainly checks safety and dose, usually in a small group.
- Participants
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About 300 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Apr 2023
- Expected to finish
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May 2028
An estimate. End dates often move.
- Lead sponsor
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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
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18 years and older
- Sex
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Male participants only
- Healthy volunteers
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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 Hide 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.
Inclusion Criteria: * Part 1 A-G, 1I, 1J, and 1K (all combination treatments) and Parts 2B-C (cabazitaxel, docetaxel): Metastatic castration-resistant prostate cancer (mCRPC) with confirmed adenocarcinoma of the prostate as defined by prostate cancer working group 3 (PCWG3); Parts 2D-G, 2I, 2J, and 2K (apalutamide, enzalutamide, darolutamide, abiraterone acetate + prednisone \[AAP\], lutetium Lu-177 vipivotide tetraxetan, JNJ-101556143): mCRPC: Histologically confirmed adenocarcinoma of the prostate as defined by PCWG3, with a minimum PSA of 2 nanogram \[ng\]/milliliter (mL); Part 2H (apalutamide): metastatic hormone-sensitive prostate cancer(mHSPC) with PSA greater than (\>) 0.2 ng/mL on 6 to 24 months of treatment with a next generation ARPI (apalutamide, enzalutamide, darolutamide, or abiraterone) * Measurable or evaluable disease, except for Part 2H * (a) Part 1A (cetrelimab) - Prior treatment for mCRPC with at least 1 prior androgen receptor pathway inhibitors (ARPI) (that is, abiraterone acetate, apalutamide, enzalutamide, darolutamide), or chemotherapy (example, docetaxel). (b) Part 1C and 2C (docetaxel), Part 1D (apalutamide), Part 1E and 2E (enzalutamide), Part 1F and 2F (darolutamide), and Part 1G, 2G (AAP), and Part 1K \& 2K (JNJ-101556143)- Prior treatment with at least 1 prior ARPI (that is, apalutamide, enzalutamide, darolutamide, or abiraterone acetate). (C) Part 1B and 2B (cabazitaxel) - Prior treatment with at least 1 prior ARPI (ie, abiraterone acetate, apalutamide, enzalutamide, darolutamide) and docetaxel. (d) Part 2D (apalutamide) - Prior treatment with at least 1 prior ARPI (e) Part 2H (apalutamide)- Participant may have received up to 6 cycles of docetaxel. The last dose of docetaxel must be administered at least 2 months prior to enrollment (f) Parts 1I, 1J, 2I \& 2J (lutetium Lu-177 vipivotide tetraxetan)- Prior treatment with at least 1 ARPI (abiraterone acetate, enzalutamide, darolutamide, or apalutamide). Participant must not have received prior cytotoxic chemotherapy or prior radioligand therapy (RLT) for mCRPC * Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1 * Adequate organ functions Exclusion Criteria: * Active autoimmune disease within the 12 months prior to signing consent that requires systemic immunosuppressive medications * Toxicity related to prior anticancer therapy that has not returned to Grade less than or equal to (\<=) 1 or baseline levels (except for alopecia, vitiligo, Grade \<=2 peripheral neuropathy) * Solid organ or bone marrow transplantation * Known allergies, or intolerance to any of the components (example, excipients) of pasritamig, cetrelimab (Part 1A), cabazitaxel, Part 1B and 2B , docetaxel Part 1C and 2C , apalutamide (Part 1D and 2D and Part 2H), enzalutamide (Part 1E and 2E), darolutamide (Part 1F and 2F), or AAP (Part 1G and 2G), lutetium Lu-177 vipivotide tetraxetan (Parts 1I, 1J, 2I, and 2J), or JNJ-101556143 (Parts 1K \& 2K) * Significant infections or serious lung, heart or other medical conditions
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
15 sites in 3 countries. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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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
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Florida Cancer Specialists
RECRUITINGSarasota, Florida, 34232, United States
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Hosp Univ Fund Jimenez Diaz
RECRUITINGMadrid, 28040, Spain
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Hosp Univ Hm Sanchinarro
RECRUITINGMadrid, 28050, Spain
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Hosp Univ Vall D Hebron
RECRUITINGBarcelona, 8035, Spain
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Hosp. Univ. 12 de Octubre
RECRUITINGMadrid, 28041, Spain
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Icon Cancer Centre Kurralta Park
RECRUITINGKurralta Park, 5037, Australia
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Laura & Isaac Perlmutter Cancer Center at NYU Langone Hospital - Long Island
RECRUITINGMineola, New York, 11501, United States
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Macquarie University
RECRUITINGMacquarie University, 2109, Australia
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NYU Langone Health
RECRUITINGNew York, New York, 10016, United States
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Perlmutter Cancer Center at NYU Langone Brooklyn
RECRUITINGBrooklyn, New York, 11223, United States
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Peter MacCallum Cancer Centre
RECRUITINGMelbourne, 3000, Australia
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Princess Alexandra Hospital
RECRUITINGWoolloongabba, 4102, Australia
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Sidney Kimmel Cancer Center - Jefferson Health
RECRUITINGPhiladelphia, Pennsylvania, 19107, United States
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Start Midwest
RECRUITINGGrand Rapids, Michigan, 49546, United States
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Washington University School Of Medicine
RECRUITINGSt Louis, Missouri, 63110, United States
More trials for these conditions
Other studies related to the condition(s) this trial covers.
- First-in-Human biologic JUR-003 put to the test against metastatic prostate cancer
- New drug combo targets CD46 in aggressive prostate cancer
- Can a Hormone-Blocking drug boost chemotherapy against prostate cancer?
- Can a Cancer-Targeting drug slow advanced prostate cancer?
- Can a smart radiation drug hunt down prostate cancer cells?
- Can a new daily pill slow advanced prostate cancer?