A Study of JNJ-79032421 Targeting Mesothelin for Advanced Stage Solid Tumors

July 18, 2025 updated by: Janssen Research & Development, LLC

A Phase 1 Study of JNJ-79032421, a T-cell Redirecting Agent Targeting Mesothelin for Advanced Stage Solid Tumors

The purpose of this study is to determine recommended phase 2 dose(s) (RP2Ds) of JNJ-79032421 and to determine the safety and tolerability of JNJ-79032421 at the RP2D(s).

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
35

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • Spain
      • Barcelona, Spain, 08035
        • Hosp Univ Vall D Hebron
      • Madrid, Spain, 28040
        • Hosp Univ Fund Jimenez Diaz
      • Madrid, Spain, 28050
        • Hosp Univ Hm Sanchinarro

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Histologically or cytologically confirmed diagnosis of one of the following unresectable/locally advanced or metastatic solid tumors: a) Ovarian cancer includes high grade serous epithelial ovary, fallopian tube, or primary peritoneal cancer. Participants must have progressed after at least 2 prior lines of systemic therapy and have either, i) platinum-refractory disease (ie, persistent disease following completion of platinum-based primary chemotherapy); or ii) platinum-resistant recurrent disease; b) Primary pleural or peritoneal mesothelioma. Sarcomatoid and well differentiated papillary histologies are not allowed. Participants must have progressed after at least 1 prior line of systemic therapy; c) Pancreatic ductal adenocarcinoma. Other histologies and mixed histologies are not allowed. Participants must have progressed after at least 1 prior line of systemic therapy.
  • Measurable or evaluable disease: a) Part 1: Measurable or evaluable disease; b) Part 2: At least one measurable lesion per RECIST v1.1. Participants with mesothelioma must have disease measurable per mRECIST v1.1.
  • Can have a prior or concurrent second malignancy (other than the disease under study) whose natural history or treatment is unlikely to interfere with any study endpoints of safety or the efficacy of the study treatment(s)
  • Eastern Cooperative Oncology Group (ECOG) performance status grade of 0 or 1.
  • Selected participants in the pharmacokinetic and pharmacodynamic (PK/PD) cohorts (Part 1) as well as selected participants in Part 2 must agree to undergo mandatory tumor biopsies.

Exclusion Criteria:

  • History of known central nervous system (CNS) or leptomeningeal involvement.
  • Left ventricular ejection fraction on screening echocardiogram below normal institutional limits.
  • History of talc pleurodesis for pleural effusion within 3 months of starting study treatment.
  • Concurrent empyema of the lung pleural space requiring antibiotics or chest tube or evidence of resultant fistula formation.
  • History of hyperthermic intraperitoneal chemotherapy (HIPEC) within 6 months of starting study treatment.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Sequential Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Part 1 (Dose Escalation): JNJ-79032421
In Part 1 (Dose escalation), participants will receive JNJ-79032421. The dose will be escalated sequentially until the recommended phase 2 dose (RP2D) regimen(s) have been identified.
Drug: JNJ-79032421
JNJ-79032421 will be administered.
Drug: JNJ-79032421
JNJ-79032421 will be administered at RP2D regimen.
Experimental: Part 2 (Dose Expansion): JNJ-79032421
In Part 2 (Dose expansion), participants will receive JNJ-79032421 at the RP2D regimen(s) determined in Part 1.
Drug: JNJ-79032421
JNJ-79032421 will be administered.
Drug: JNJ-79032421
JNJ-79032421 will be administered at RP2D regimen.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Part 1: Number of Participants with Dose Limiting Toxicity (DLTs)
Time Frame: Up to first 21 days after first dose
The DLTs are adverse events including certain high grade non-hematologic or hematologic toxicities, or toxicities meeting other specific criteria.
Up to first 21 days after first dose
Part 1 and Part 2: Number of Participants with Adverse Events (AEs) by Severity
Time Frame: Up to 3 years
An AE is any untoward medical occurrence in a clinical study participant administered an investigational or non-investigational product and it does not necessarily have a causal relationship with the investigational product. 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 (ICANS), 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.
Up to 3 years

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Part 1 and Part 2: Serum Concentration of JNJ-79032421
Time Frame: Up to 3 years
Serum concentration of JNJ-79032421 will be reported.
Up to 3 years
Part 1 and Part 2: Maximum Observed Analyte Concentration (Cmax) of JNJ-79032421
Time Frame: Up to 3 years
Cmax is defined as maximum observed analyte concentration of JNJ-79032421.
Up to 3 years
Part 1 and Part 2: Time to Reach Maximum Observed Analyte Concentration (Tmax) of JNJ-79032421
Time Frame: Up to 3 years
Tmax is defined as the time to reach maximum observed analyte concentration of JNJ-79032421.
Up to 3 years
Part 1 and Part 2: Area Under the Curve from Time t1 to Time t2 (AUC[t1-t2]) of JNJ-79032421
Time Frame: Up to 3 years
AUC(t1-t2) is defined as area under the analyte concentration for a specific time interval defined by t1 and t2 (AUC[t1-t2]) of JNJ-79032421.
Up to 3 years
Part 1 and Part 2: Number of Participants with Presence of Anti-JNJ-79032421 Antibodies
Time Frame: Up to 3 years
The maximum titers of antibodies to JNJ-79032421 will be summarized for participants positive with antibodies to JNJ-79032421.
Up to 3 years
Part 1 and Part 2: Objective Response Rate (ORR)
Time Frame: Up to 3 years
ORR is defined as the percentage of participants with a best response of complete response or partial response according to Response Evaluation Criteria in Solid Tumors (RECIST v1.1), and revised mRECIST for assessment of malignant pleural mesothelioma.
Up to 3 years
Part 1 and Part 2: Duration of Response (DOR)
Time Frame: Up to 3 years
DOR is defined as the duration from the date of initial documentation of a response (PR or CR) to the date of first documented evidence of relapse or death according to RECIST v. 1.1, and revised mRECIST for malignant pleural mesothelioma.
Up to 3 years
Part 1 and Part 2: Cancer Antigen (CA) 125 Response Rate for Ovarian Cancer Only
Time Frame: Up to 3 years
CA 125 response rate is defined as the proportion of participants with ovarian cancer who achieved a partial response or complete response according to the Gynecologic Cancer Intergroup (GCIG) response criteria for CA 125. A CA 125 response is defined as at least 50 percentage (%) reduction in CA 125 levels from a pretreatment sample which must be confirmed and maintained for at least 28 days.
Up to 3 years

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Janssen Research & Development, LLC

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: Janssen Research & Development, LLC Clinical Trial, Janssen Research & Development, LLC

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
February 9, 2024

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
June 23, 2025

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
June 23, 2025

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
February 5, 2024

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
February 5, 2024

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
February 13, 2024

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
July 20, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 18, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
July 1, 2025

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • CR109341
  • 2023-504896-26-00 (Registry Identifier: EUCT number)
  • 79032421STM1001 (Other Identifier: Janssen Research & Development, LLC)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

The data sharing policy of the Janssen Pharmaceutical Companies of Johnson and Johnson is available at www.janssen.com/clinical-trials/transparency.

As noted on this site, requests for access to the study data can be submitted through Yale Open Data Access (YODA) Project site at yoda.yale.edu

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

Yes

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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Conditions

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Locations

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