for males ages 18 years and up (full criteria)
at San Francisco, California and other locations
study started
estimated completion



The purpose of this study is to determine the recommended Phase 2 dose(s) (RP2D[s]) of JNJ-69086420 in Part 1 (Dose Escalation) and to determine safety and and preliminary signs of clinical activity at the RP2D(s) in Part 2 (Dose Expansion).

Official Title

A Phase 1 Study of JNJ-69086420, an Actinium-225-Labeled Antibody Targeting Human Kallikrein-2 (hK2) for Advanced Prostate Cancer


Prostatic Neoplasms Adenocarcinoma JNJ-69086420


You can join if…

Open to males ages 18 years and up

  • Histologic: metastatic castration-resistant prostate cancer (mCRPC) with histologic confirmation of adenocarcinoma. Adenocarcinoma with small-cell or neuroendocrine features is allowed
  • Must have had prior exposure to at least one novel androgen receptor (AR) targeted therapy (example, abiraterone acetate, enzalutamide, apalutamide, darolutamide); prior taxane or other chemotherapy is acceptable but not required
  • Treatment with other agents for prostate cancer, if received, must have been discontinued greater than or equal to (>=) 2 weeks prior to first dose of study drug.
  • Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1
  • Adequate organ functions as reflected in laboratory parameters

You CAN'T join if...

  • Part 1: Prior treatment with radium Xofigo (Ra 223 dichloride), strontium, or samarium therapy or radioconjugate therapy
  • Known history of myelodysplastic syndrome, leukemia, or hematological malignancy with features suggestive of myelodysplastic syndrome/acute myeloid leukemia at any timepoint
  • Toxicity from prior anticancer therapy has not resolved to baseline levels or to Grade less than or equal to <= 1 (except alopecia, radiation tissue fibrosis, or peripheral neuropathy)
  • Known allergies, hypersensitivity, or intolerance to JNJ-69086420 or its excipients and protein therapeutics
  • Active or chronic hepatitis B or hepatitis C infection.


  • University of California San Francisco not yet accepting patients
    San Francisco California 94158-2549 United States
  • City of Hope accepting new patients
    Duarte California 91010 United States


accepting new patients
Start Date
Completion Date
Janssen Research & Development, LLC
To learn how to participate in this trial please click here.
Phase 1
Study Type
Last Updated