A Study of JNJ-78278343, a T-Cell-Redirecting Agent Targeting Human Kallikrein 2 (KLK2), for Advanced Prostate Cancer

• Sponsor: Janssen Research & Development, LLC (Industry)
• Overall Status: Recruiting
• CT.gov ID: NCT04898634
• Collaborator: (none)
• Enrollment: 110
• Locations: 11
• Arm: 1
• Anticipated Duration (Months): 29.6
• Patients Per Site: 10
• Patients Per Site Per Month: 0.3

Study Details

Study Description

Brief Summary

The purpose of this study is to determine the recommended phase 2 dose(s) (RP2Ds) of JNJ-78278343 in Part 1 (Dose Escalation) and the safety at the RP2Ds in Part 2 (Dose Expansion).

Condition or Disease	Intervention/Treatment	Phase
Prostatic Neoplasms	Drug: JNJ-78278343	Phase 1

Detailed Description

JNJ-78278343 is a humanized immunoglobulin (Ig)G1-based bispecific antibody designed to direct T lymphocytes (T cells) to human kallikrein 2 (hK2or KLK2) positive target tumor cells. One arm of JNJ-78278343 binds to the cluster of differentiation (CD)3 receptor complex present on T cells and the other arm binds to KLK2 present on target tumor cells leading to the activation of the T cells and T-cell-mediated lysis of the KLK2 bearing tumor cells. JNJ-78278343 is being developed for the treatment of metastatic castration-resistant prostate cancer (mCRPC). KLK2 expression is highly restricted in normal tissues and highly enriched in prostate adenocarcinoma and its expression is mostly maintained throughout disease progression, making KLK2 an attractive target for therapy. This study will be conducted in 2 phases: a Screening Phase (up to 30 days), a Treatment Phase (start of study drug administration) with an end of treatment (EOT) visit (up to 30 plus 14 days after last dose of study drug or prior to the start of a new anticancer therapy), whichever comes first). The total duration of the study is up to 1 year and 10 months. Safety assessment will include adverse events (AEs) including dose-limiting toxicity (DLT), serious adverse events (SAEs), physical examination, vital signs, electrocardiogram, clinical safety laboratory assessments, Eastern Cooperative Oncology Group (ECOG) performance status, and neurologic examination.

Study Design

• Study Type: Interventional
• Anticipated Enrollment: 110 participants
• Allocation: N/A
• Intervention Model: Sequential Assignment
• Masking: None (Open Label)
• Primary Purpose: Treatment
• Official Title: A Phase 1 Study of JNJ-78278343, a T-Cell-Redirecting Agent Targeting Human Kallikrein 2 (KLK2), for Advanced Prostate Cancer
• Actual Study Start Date: Jul 13, 2021
• Anticipated Primary Completion Date: May 20, 2023
• Anticipated Study Completion Date: Dec 30, 2023

Arms and Interventions

Arm	Intervention/Treatment
Experimental: JNJ-78278343 Participants will receive JNJ-78278343 subcutaneously (SC). The dose levels will be escalated based on the dose limiting toxicities (DLT) evaluation by the study evaluation team (SET) in Part 1 (dose escalation). In Part 2 (dose expansion), participants will receive JNJ-78278343 SC at recommended phase 2 dose (RP2D) as determined in Part 1.	Drug: JNJ-78278343; JNJ-78278343 will be administered subcutaneously.

Outcome Measures

Primary Outcome Measures

1. Part 1 and 2: Number of Participants With Adverse Events (AEs) [Up to 1 year and 10 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.

2. Part 1 and 2: Number of Participants With AEs by Severity [Up to 1 year and 10 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. Cytokine release syndrome (CRS) will be graded according to the American Society for Transplantation and Cellular Therapy (ASTCT) guidelines.

3. Part 1: Number of Participants With Dose-Limiting Toxicity (DLT) [Up to 1 year and 10 months]

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

Secondary Outcome Measures

1. Serum Concentration of JNJ-78278343 [Up to 1 year and 10 months]

   Serum concentrations of JNJ-78278343 will be determined.

2. Systemic Cytokine Concentrations [Up to 1 year and 10 months]

   Cytokine concentrations will be determined for biomarker assessment.

3. Serum Prostate Specific Antigen (PSA) Concentration [Up to 1 year and 10 months]

   Serum PSA concentration will be measured.

4. Number of Participants With Anti-JNJ-78278343 Antibodies [Up to 1 year and 10 months]

   Serum samples will be analyzed for the detection of anti-JNJ-78278343 antibodies using a validated assay method.

5. Objective Response Rate (ORR) [Up to 1 year and 10 months]

   ORR is defined as the percentage of participants who have a partial response (PR) or better according to the response evaluation criteria in solid tumors (RECIST) version 1.1 response criteria without evidence of bone progression according to prostate cancer working group 3 (PCWG3).

6. PSA Response Rate [Up to 1 year and 10 months]

   PSA response rate is defined as the percentage of participants with a decline of PSA of 50 percent (%) or more from baseline. The maximum reduction from baseline in PSA will also be calculated during the treatment.

7. Duration of Response (DOR) [Up to 1 year and 10 months]

   DOR will be calculated among responders (PR or better) from the date of initial documentation of a response (PR or better) to the date of first documented evidence of progressive disease, as defined in the PCWG3 or RECIST version 1.1 response criteria, or death due to any cause, whichever occurs first.

Eligibility Criteria

Criteria

• Ages Eligible for Study: 18 Years and Older
• Sexes Eligible for Study: Male
• Accepts Healthy Volunteers: No

Inclusion Criteria:

• Confirmed adenocarcinoma of the prostate which has spread to other body parts

• Prior treatment with at least 1 prior novel androgen receptor (AR)-targeted therapy or chemotherapy

• Measurable or evaluable disease

• Concurrent use of any other anticancer treatment must be discontinued for at least 2 weeks before the first dose of study drug

• Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1

• Prior surgical removal of testicles; or, for participants who have not undergone surgical removal of testicles, must be receiving ongoing androgen deprivation therapy (ADT) with a gonadotropin releasing hormone analog

Exclusion Criteria:

Disease conditions

• Active central nervous system (CNS) involvement

• Toxicity related to prior anticancer therapy has not adequately recovered

Prior/Concomitant Therapy

• Prior treatment with human kallikrein (KLK) 2-targeted therapy

• Received, or are receiving, medications that suppress the immune system within 3 days prior to the first dose of study drug

• Received or plans to receive any live, attenuated vaccine within 4 weeks prior to the first dose of study drug

Prior/Concurrent Medical Conditions

• Diagnosis of cancer other than prostate cancer within 2 years prior to the first dose of study drug

• Solid organ or bone marrow transplantation

• Major clotting diseases within one month prior to the first dose of study drug

• Active autoimmune disease within 12 months prior to the first dose of study drug

• Active infection

• Major diseases of heart and blood vessels within 6 months prior to the first dose of study drug

• Clinically significant lung diseases

• Active or chronic hepatitis B or hepatitis C infection

• Known positive test result for human immunodeficiency virus (unless stable on antiretroviral therapy with undetectable viral load)

• Any serious underlying medical conditions or other issue that would impair the ability of the participant to receive or tolerate the planned treatment

Contacts and Locations

Locations

	Site	City	State	Country	Postal Code
1	Columbia University Medical Center, Herbert Irving Pavilion	New York	New York	United States	10032
2	Memorial Sloan Kettering Cancer Center	New York	New York	United States	10065
3	University of Washington	Seattle	Washington	United States	98195-9472
4	Centre Leon Bérard	Lyon Cedex 8		France	69373
5	APHM Hopital Timone	Marseille		France	13005
6	Institut Gustave Roussy	Villejuif		France	94800
7	NKI-AVL, Amsterdam	Amsterdam		Netherlands	1066 CX
8	Erasmus MC	Rotterdam		Netherlands	3015 GD
9	Hosp. Univ. Fund. Jimenez Diaz	Madrid		Spain	28040
10	Hosp. Univ. Hm Sanchinarro	Madrid		Spain	28050
11	Hosp. Virgen de La Victoria	Málaga		Spain	29010

Sponsors and Collaborators

• Janssen Research & Development, LLC

Investigators

• Study Director: Janssen Research & Development, LLC Clinical Trial, Janssen Research & Development, LLC

Study Documents (Full-Text)

None provided.

More Information

Publications

None provided.

• Responsible Party: Janssen Research & Development, LLC
• ClinicalTrials.gov Identifier: NCT04898634
• Other Study ID Numbers: CR108958; 2020-005970-83; 78278343PCR1001
• First Posted: May 24, 2021
• Last Update Posted: Aug 3, 2022
• Last Verified: Aug 1, 2022

• Individual Participant Data (IPD) Sharing Statement: Yes
• Plan to Share IPD: Yes
• 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
• Keywords provided by Janssen Research & Development, LLC: Metastatic castration-resistant prostate cancer (mCRPC)
• Additional relevant MeSH terms: Prostatic Neoplasms

Study Results

No Results Posted as of Aug 3, 2022