LIGHTBEAM-U01 Substudy 01B: A Phase 1/2 Substudy to Evaluate the Safety and Efficacy of Pembrolizumab in Combination With Investigational Agents in Pediatric and Young Adult Participants With Hematologic Malignancies or Solid Tumors

Description

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), or advanced melanoma. 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.The master screening protocol is MK-9999-U01.

Trial Eligibility

Inclusion Criteria: * Must have 1 of the following histologically or cytologically confirmed diagnosis of Relapsed or refractory classical Hodgkin lymphoma (cHL), advanced melanoma, 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

Study Info

Interventions

Locations Recruiting

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