A Study of JNJ-87189401 and JNJ-78278343 for Advanced Prostate Cancer

This study is looking at new combinations of medicines for men with advanced prostate cancer. It will test JNJ-87189401 and JNJ-78278343, sometimes with other approved drugs like apalutamide or Lutetium Lu-177 Vipivotide Tetraxetan, and also with JNJ-101556143. The main goal is to find out the safest dose of these combinations and to see how many side effects participants experience. To join, you must be a man aged 18 or older with prostate cancer that has been confirmed by a biopsy. The study is planned to include 355 participants, but its current status is unclear.

Study design
This is an interventional study with a planned enrollment of 355 participants. The study aims to determine recommended drug regimens and evaluate their safety.
What's involved
Not specified in the trial record.
Compensation
Not stated in the trial record.
Follow-up
Participants will be monitored for adverse events for up to 4 years and 8 months.

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NCT06095089

A Study of JNJ-87189401 Combined With JNJ-78278343 for Advanced Prostate Cancer

Recruiting
PHASE1Ages 18+InterventionalTreatment
Janssen Research & Development, LLC
~355 participants
Updated 2026-08-28 on ClinicalTrials.gov
What's tested:JNJ-78278343JNJ-87189401ApalutamideLutetium Lu-177 Vipivotide TetraxetanJNJ-101556143

At a glance

Recruiting sites
19 of 19 listed sites are recruiting right now
RecruitingSuspended, closed, or not yet open
What they're measuring
Parts 1, 2C, 3 and 4: Number of Participants With Dose Limiting Toxicity (DLT)
Measured over Up to 21 days after first combination dose of study drugs
+1 more outcome measured
Prostatic Neoplasms
19 sites across 15 states
France3
Texas2
Australia2
Colorado1
Georgia1
Minnesota1
New Jersey1
New York1
  • Janssen Research & Development, LLC Clinical Trial · STUDY_DIRECTOR · Janssen Research & Development, LLC

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Eligibility criteria

Inclusion

Histologically confirmed adenocarcinoma of the prostate. Adenocarcinoma with small cell or neuroendocrine (NE) features is permitted. However, small cell carcinoma, carcinoid tumor, mixed NE carcinoma, or large cell NE carcinoma is disallowed
Measurable or evaluable disease per PCWG3 criteria
Part 1, Parts 2A, 2B, 3 and 4: Prior orchiectomy or medical castration; participants who have not undergone orchiectomy, must be receiving ongoing androgen deprivation therapy with a gonadotropin releasing hormone (GnRH) analog (agonist or antagonist), prior to the first dose of study drug and must continue this therapy throughout the treatment phase
Have an Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1

Exclusion

History of an autoimmune disease within the 12 months prior to signing consent
Any of the following within 6 months prior to signature of informed consent: a. myocardial infarction, b. severe or unstable angina, c. clinically significant ventricular arrhythmias, d. congestive heart failure (New York Heart Association \[NYHA\] class II to IV), e. transient ischemic attack, and f. Cerebrovascular accident
  • Parts 1, 2C, 3 and 4: Number of Participants With Dose Limiting Toxicity (DLT)Up to 21 days after first combination dose of study drugs

    DLTs are specific adverse events (AEs) and are defined as any of the following: high grade non-hematologic toxicity or hematologic toxicity.

  • Number of Participants with Adverse Events (AEs) by SeverityUp to 4 years 8 months

    An AE is any untoward medical occurrence in a participant participating in a clinical study that does not necessarily have a causal relationship with the pharmaceutical/biological agent under study. Severity will be graded according to the National Cancer Institute Common Terminology Criteria for Adverse Events (NCI-CTCAE) version 5.0 with the exception of cytokine release syndrome (CRS) and immune effector cell-associated neurotoxicity syndrome events, which will be graded by American Society for Transplantation and Cellular Therapy (ASTCT) guidelines. Severity scale ranges from grade 1 (mild) to grade 5 (death). Grade 1= mild, Grade 2= moderate, Grade 3= severe, Grade 4= life-threatening and Grade 5= death related to adverse event.