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

Purpose

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 preliminary signs of clinical activity at the RP2D(s) in Part 2 (Dose Expansion).

Conditions

  • Prostatic Neoplasms
  • Adenocarcinoma

Eligibility

Eligible Ages
Over 18 Years
Eligible Genders
Male
Accepts Healthy Volunteers
No

Inclusion Criteria

  • Metastatic castration resistant prostate cancer (mCRPC) with histologic confirmation of adenocarcinoma (adenocarcinoma with small-cell or neuroendocrine features is allowed) with prior exposure to at least one androgen receptor (AR) targeted therapy (example, abiraterone acetate, enzalutamide, apalutamide, darolutamide). In addition: Part 1: prior taxane or other chemotherapy is acceptable but not required. Part 2a: prior taxane or other chemotherapy required, Part 2b: no prior taxane or other chemotherapy, Part 2c: mCRPC that has progressed after prior treatment with lutetium Lu-177 vipivotide tetraxetan - Prior orchiectomy or medical castration; or, for 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 - Palliative radiotherapy (for example [eg], soft tissue lesions) must be completed greater than (>) 2 weeks prior to start of study drug except for palliative radiotherapy for pain (eg, bone pain), which may be used any time prior to first dose - Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1 - Adequate organ functions as reflected in laboratory parameters

Exclusion Criteria

  • Prior treatment with radium Xofigo (Ra 223 dichloride), strontium, samarium, or other radioconjugate therapy. In addition: Part 2b: Prior treatment with chemotherapy (eg, docetaxel) or poly ADP ribose polymerase (PARP) inhibitors. Part 2c: Prior treatment with lutetium Lu-177 vipivotide tetraxetan is permitted - 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

Study Design

Phase
Phase 1
Study Type
Interventional
Allocation
Non-Randomized
Intervention Model
Sequential Assignment
Primary Purpose
Treatment
Masking
None (Open Label)

Arm Groups

ArmDescriptionAssigned Intervention
Experimental
Part 1: Dose Escalation
Participants will receive intravenous (IV) injection of JNJ-69086420 with one or multiple doses. The dose levels will be escalated based on the dose limiting toxicities (DLT) evaluation by Study Evaluation Team (SET) until the recommended Phase 2 Dose (RP2D) has been identified.
  • Drug: JNJ-69086420
    Participants will receive IV injection of JNJ-69086420.
    Other names:
    • Actinium-225-DOTA-h11B6
Experimental
Part 2: Dose Expansion
Participants in one or more cohorts will receive intravenous (IV) injection of JNJ-69086420 at the RP2D(s) determined in Part 1.
  • Drug: JNJ-69086420
    Participants will receive IV injection of JNJ-69086420.
    Other names:
    • Actinium-225-DOTA-h11B6

Recruiting Locations

Tulane School Of Medicine
New Orleans, Louisiana 70112

More Details

Status
Recruiting
Sponsor
Janssen Research & Development, LLC

Study Contact

Study Contact
844-434-4210
Participate-In-This-Study@its.jnj.com