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JNJ-75229414

Phase 1

Prostatic Neoplasms | Small molecule | Oncology |Johnson & Johnson|Last Updated: Apr 17, 2026

Success Probability

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Market & Valuation

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Trial Design

CONTROLLED
Total Trials1
Total Enrollment15

FDA Designations

No designations recorded

Clinical trial landscape

JNJ-75229414 · 1 trial · 1 indication

Phase 1 1
NCT05022849A Study of JNJ-75229414 for Metastatic Castration-resistant Prostate Cancer ParticipantsProstatic Neoplasms
COMPLETED15 Analytics
PHASE1COMPLETED
A Study of JNJ-75229414 for Metastatic Castration-resistant Prostate Cancer Participants
Prostatic NeoplasmsUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of Participants With Adverse Events (AEs)
Up to 15 years 9 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.

Number of Participants with AEs by Severity
Up to 15 years 9 months

Severity will be graded according to the National Cancer Institute Common Terminology Criteria for Adverse Events (NCI-CTCAE) version 5.0. 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.

Part 1: Number of Participants with Dose-limiting Toxicity (DLT)
Up to 28 days

Number of participants with DLT will be assessed. The DLTs are specific adverse events and are defined as any of the following: high grade non-hematologic toxicity, or hematologic toxicity.

Secondary Endpoints

Maximum Observe Plasma Concentration (Cmax) of JNJ-75229414
Up to 15 years 9 months
Time to Reach Maximum Observed Plasma Concentration (Tmax) of JNJ-75229414
Up to 15 years 9 months
Area Under Plasma Concentration Versus Time Curve from Time Zero to t Time (AUC[0-t]) of JNJ-75229414
Up to 15 years 9 months
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeOTHER

Treatment Arms

ArmTypeDescription
Part 1: Dose EscalationEXPERIMENTALParticipants will receive a conditioning regimen of cyclophosphamide and fludarabine intravenously (IV) followed by JNJ-75229414 IV infusion escalated sequentially with a targeted dose consistent with the dose required by the cohort being enrolled to determine recommended Phase 2 dose (RP2D) regimen(s). Additional, intermediate dose levels may be implemented based on the review of all available data including, but not limited to, safety, efficacy, pharmacokinetics (PK), and pharmacodynamics (PD) by the study evaluation team (SET). Participants may receive bridging therapy (anti-androgen receptor agents \[example, abiraterone, enzalutamide\] and radiotherapy, or chemotherapy \[example, docetaxel\]) if clinically indicated to maintain disease stability.
Part 2: Dose ExpansionEXPERIMENTALParticipants will receive JNJ-75229414 for each RP2D regimen determined in Part 1.

Interventions

NameTypeDescription
JNJ-75229414DRUGJNJ-75229414 infusion will be administered intravenously.
Bridging TherapyDRUGBridging therapy including Anti-AR agents (example, abiraterone, enzalutamide) will be administered orally and radiotherapy, or chemotherapy (example, docetaxel) will be administered intravenously.
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Eligibility Criteria

Age Range18 Years to N/A
SexMALE
Healthy VolunteersNo
Study Sites8

Inclusion Criteria: * Histology: Metastatic CRPC (mCRPC) with histologic confirmation of adenocarcinoma. Metastatic CRPC with neuroendocrine features or mixed histology is excluded * Prior Therapy: Prior treatment with at least 1 prior novel androgen receptor AR-targeted therapy (that is, abiratero...

Countries:United States
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Frequently asked questions about JNJ-75229414

What is JNJ-75229414 used for?

JNJ-75229414 is an investigational small molecule being studied for the treatment of prostatic neoplasms, specifically metastatic castration-resistant prostate cancer. It is currently in Phase 1 clinical development and is not yet approved by regulatory authorities.

Who makes JNJ-75229414?

JNJ-75229414 is being developed by Johnson & Johnson, a pharmaceutical company traded on the New York Stock Exchange under the ticker symbol JNJ. The drug is currently in Phase 1 clinical trials for prostate cancer.

What phase is JNJ-75229414 in?

JNJ-75229414 is in Phase 1 clinical development. It is an investigational drug and has not been approved by the FDA or any other regulatory agency. A Phase 1 study for metastatic castration-resistant prostate cancer has been completed.

What clinical trials is JNJ-75229414 in?

JNJ-75229414 has one completed Phase 1 clinical trial, NCT05022849, which studied the drug in 15 male participants with metastatic castration-resistant prostate cancer in the United States. The trial was a controlled, non-randomized study.

Is JNJ-75229414 FDA approved?

JNJ-75229414 is not FDA approved. It is an investigational drug currently in Phase 1 clinical development for prostate cancer. The completed Phase 1 trial, NCT05022849, evaluated the drug in 15 participants with metastatic castration-resistant prostate cancer.