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A Study of Pasritamig With Docetaxel Versus Docetaxel in Participants With Metastatic Castration-Resistant Prostate Cancer

A Phase 3 Randomized, Open-label Study of Pasritamig (JNJ-78278343), a T-cell-redirecting Agent Targeting Human Kallikrein 2, With Docetaxel Versus Docetaxel for Metastatic Castration-resistant Prostate Cancer - KLK2-PASenger

Status
Active, not recruiting
Phases
Phase 3
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCT2031250582
Enrollment
800
Registered
2025-12-18
Start date
2026-02-27
Completion date
Unknown
Last updated
2026-05-25

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Prostatic Neoplasms, Castration-Resistant

Interventions

[Arms] Experimental: Pasritamig+Docetaxel Participants will receive pasritamig along with docetaxel until the end of trial (EOT) visit or until confirmed radiographic progression by blinded independen

Sponsors

Fujikawa Ei
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: - Have histologically confirmed adenocarcinoma of the prostate - Have disease that is metastatic at the time of the screening as determined by the investigator - Participants must receive ongoing androgen deprivation therapy (ADT) with a gonadotropin releasing hormone (GnRH) analog throughout the treatment or have had prior bilateral orchiectomy, and have serum testosterone less than or equal to (<=) 50 nanogram per milliliter (ng/dL) (<= 1.73 nanomoles per Liter [nmol/L]) at screening - Have progressed on at least 1 novel androgen receptor pathway inhibition (ARPI) but received no more than 2 different ARPI for any stage of disease. Must have discontinued ARPI before randomization into the study - Have an eastern cooperative oncology group (ECOG) performance status of 0 to 1

Exclusion criteria

Exclusion criteria: - Known history of either brain or leptomeningeal prostate cancer metastases - Participants with known breast cancer gene 1/2 (BRCA 1/2) mutations (germline or somatic) who have not received treatment with a poly (ADP-ribose) polymerase (PARP) inhibitor, unless not available or contraindicated - Prior or concurrent second malignancy (other than the disease under study) because the natural history or treatment could interfere with study endpoints - Received cytotoxic chemotherapy for prostate cancer in any setting - Received prior treatment with human kallikrein 2 (KLK-2) directed therapies

Design outcomes

Primary

MeasureTime frame
1. Radiographic Progression-Free Survival (rPFS) Assessed by BICR rPFS is assessed by BICR and is defined as the time from the date of randomization to the first date of radiographic disease progression, or death due to any cause, whichever occurs first. [Time Frame: Up to approximately 1 years 10 months]

Secondary

MeasureTime frame
Refer to Appendix

Contacts

Public ContactMedical Information Center

Janssen Pharmaceutical K.K.

DL-JANJP-JCO_TL_TSG_EMP@its.jnj.com+81-120-183-275

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: May 30, 2026