A Study of Pembrolizumab in Combination With Investigational Agents in Pediatric and Young Adult Participants With Hematologic Malignancies or Solid Tumors (MK-9999-01B/LIGHTBEAM-U01)

NCT ID: NCT06395090

Last Updated: 2025-04-08

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

WITHDRAWN

Clinical Phase

PHASE1/PHASE2

Study Classification

INTERVENTIONAL

Study Start Date

2025-01-15

Study Completion Date

2029-06-30

Brief Summary

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This study is a rolling arm study of pembrolizumab in combination with investigational agents in pediatric participants with relapsed or refractory classical Hodgkin lymphoma (cHL) solid tumors with microsatellite instability-high (MSI-H)/mismatch repair deficient (dMMR) or tumor mutational burden-high (TMB-H). This study will have 2 parts: a safety lead-in to demonstrate a tolerable safety profile and confirm a preliminary recommended phase 2 dose (RP2D) (Part 1) followed by an efficacy evaluation (Part 2). Participants will be assigned to a treatment arm (either Part 1 or Part 2) that is open for enrollment.

There will be no hypothesis testing in this study.

Detailed Description

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The master screening protocol is MK-9999-U01.

Conditions

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Neoplasm Metastasis

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Favezelimab + Pembrolizumab

Participants will receive pembrolizumab and favezelimab via an intravenous (IV) infusion every 3 weeks (Q3W) for up to 35 cycles. Each cycle is 21 days.

Group Type EXPERIMENTAL

Pembrolizumab

Intervention Type BIOLOGICAL

IV infusion

Favezelimab

Intervention Type BIOLOGICAL

IV infusion

Favezelimab/Pembrolizumab

Participants will receive coformulated favezelimab/pembrolizumab via an IV infusion Q3W for up to 35 cycles. Each cycle is 21 days.

Group Type EXPERIMENTAL

Favezelimab/Pembrolizumab

Intervention Type BIOLOGICAL

IV infusion

Pembrolizumab + Vibostolimab

Participants will receive pembrolizumab and vibostolimab via an IV infusion Q3W for up to 35 cycles. Each cycle is 21 days.

Group Type EXPERIMENTAL

Pembrolizumab

Intervention Type BIOLOGICAL

IV infusion

Vibostolimab

Intervention Type BIOLOGICAL

IV infusion

Pembrolizumab/Vibostolimab

Participants will receive coformulated pembrolizumab/vibostolimab via an IV infusion Q3W for up to 35 cycles. Each cycle is 21 days.

Group Type EXPERIMENTAL

Pembrolizumab/Vibostolimab

Intervention Type BIOLOGICAL

IV infusion

Interventions

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Pembrolizumab

IV infusion

Intervention Type BIOLOGICAL

Favezelimab

IV infusion

Intervention Type BIOLOGICAL

Favezelimab/Pembrolizumab

IV infusion

Intervention Type BIOLOGICAL

Vibostolimab

IV infusion

Intervention Type BIOLOGICAL

Pembrolizumab/Vibostolimab

IV infusion

Intervention Type BIOLOGICAL

Other Intervention Names

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MK-3475 MK-4280A MK-7684A

Eligibility Criteria

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Inclusion Criteria

* Must have 1 of the following histologically or cytologically confirmed diagnosis of Relapsed or refractory classical Hodgkin lymphoma (cHL) solid tumors that are microsatellite instability-high (MSI-H)/mismatch repair deficient (dMMR), or solid tumors that are tumor mutational burden-high (TMB-H)
* Must have recovered from all AEs from previous anticancer therapies
* Human immunodeficiency virus (HIV)-infected participants have well controlled HIV on antiretroviral therapy (ART)

Exclusion Criteria

* HIV-infected participants with a history of Kaposi's sarcoma and/or Multicentric Castleman's Disease
* Received prior systemic anticancer therapy including investigational agents within 4 weeks before the first dose of study intervention
* Received prior radiotherapy within 2 weeks of start of study intervention, or has radiation-related toxicities, requiring corticosteroids
* Received a live or live-attenuated vaccine within 30 days before the first dose of study intervention
* Received prior anticancer therapy with an anti-PD-1, anti-programmed cell death ligand 1 (PD-L1), or anti-programmed cell death ligand 2 (anti-PD-L2) in combination with either an Anti- lymphocyte-activation gene 3 (LAG-3) agent or an Anti- T-cell immunoreceptor with immunoglobulin (Ig) and ITIM domains (TIGIT) agent
* Diagnosis of immunodeficiency or is receiving chronic systemic steroid therapy (in dosing exceeding 10 mg daily of prednisone equivalent) or any other form of immunosuppressive therapy within 7 days prior to the first dose of study intervention
* Known additional malignancy that is progressing or has required active treatment within the past 1 year
* Known active central nervous system (CNS) metastases and/or carcinomatous meningitis
* Active autoimmune disease that has required systemic treatment in the past 2 years
* History of (noninfectious) pneumonitis/interstitial lung disease that required steroids or has current pneumonitis/interstitial lung disease
* Active infection requiring systemic therapy
* Concurrent active Hepatitis B and Hepatitis C virus infection
* History of allogenic tissue/solid organ transplant
* Has symptoms of or is being treated for graft versus host disease (GVHD)
* Has not adequately recovered from major surgery or have ongoing surgical complications
* Known tumors involving the brainstem
Maximum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Merck Sharp & Dohme LLC

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Medical Director

Role: STUDY_DIRECTOR

Merck Sharp & Dohme LLC

Locations

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Yale-New Haven Hospital ( Site 2012)

New Haven, Connecticut, United States

Site Status

University of Iowa-Holden Comprehensive Cancer Center ( Site 2017)

Iowa City, Iowa, United States

Site Status

Children's Mercy Hospital ( Site 2024)

Kansas City, Missouri, United States

Site Status

Rutgers Cancer Institute of New Jersey ( Site 2008)

New Brunswick, New Jersey, United States

Site Status

New York Medical College ( Site 2023)

Valhalla, New York, United States

Site Status

Sanford Fargo Medical Center-Roger Maris Cancer Center ( Site 2003)

Fargo, North Dakota, United States

Site Status

Children's Hospital of Philadelphia (CHOP) ( Site 2021)

Philadelphia, Pennsylvania, United States

Site Status

Sanford Children's Hospital-Sanford Children's Specialty Clinic ( Site 2015)

Sioux Falls, South Dakota, United States

Site Status

Intermountain - Primary Children's Hospital ( Site 2014)

Salt Lake City, Utah, United States

Site Status

Seoul National University Hospital-Pediatrics ( Site 2972)

Seoul, , South Korea

Site Status

Asan Medical Center-Pediatrics - Pedicatric Oncology ( Site 2973)

Seoul, , South Korea

Site Status

National Taiwan University Hospital ( Site 2983)

Taipei, , Taiwan

Site Status

Countries

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United States South Korea Taiwan

Related Links

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Other Identifiers

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MK-9999-01B

Identifier Type: OTHER

Identifier Source: secondary_id

LIGHTBEAM-U01

Identifier Type: OTHER

Identifier Source: secondary_id

2023-507179-23

Identifier Type: REGISTRY

Identifier Source: secondary_id

U1111-1295-3472

Identifier Type: REGISTRY

Identifier Source: secondary_id

9999-01B

Identifier Type: -

Identifier Source: org_study_id

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