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Recruiting Phase 1, Phase 2 NCT06395103

NCT06395103 Substudy 01A: Zilovertamab Vedotin in Pediatric and Young Adult Participants With Hematologic Malignancies or Solid Tumors (MK-9999-01A/LIGHTBEAM-U01)

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Clinical Trial Summary
NCT ID NCT06395103
Status Recruiting
Phase Phase 1, Phase 2
Sponsor Merck Sharp & Dohme LLC
Condition B-cell Acute Lymphoblastic Leukemia
Study Type INTERVENTIONAL
Enrollment 90 participants
Start Date 2024-08-16
Primary Completion 2029-03-31

Eligibility & Interventions

Sex All sexes
Min Age 6 Months
Max Age 25 Years
Study Type INTERVENTIONAL
Interventions
Zilovertamab vedotin

Eligibility Fast-Check

Enter your details for a quick preliminary check. This does not replace medical advice.

What to Expect as a Participant

You will actively receive the study intervention — which may be a drug, biologic, device, or procedure.

Phase 1 is the earliest stage of human testing — safety and dosage are the primary focus. Visits are frequent and medical supervision is intensive. You will be among the first people to receive this treatment.

This trial targets 90 participants in total. It began in 2024-08-16 with a primary completion date of 2029-03-31.

⚠ This information is for research awareness only. Always consult your physician before joining any clinical trial. Participation is voluntary and you may withdraw at any time.

Brief Summary

Substudy 01A is part of a platform study. The purpose of this study is to assess the efficacy and safety of zilovertamab vedotin in pediatric participants with relapsed or refractory B-cell acute lymphoblastic leukemia (B-ALL), diffuse large B-cell lymphoma (DLBCL)/Burkitt lymphoma, or neuroblastoma and in pediatric and young adult participants with Ewing sarcoma.

Eligibility Criteria

The main inclusion and exclusion criteria include but are not limited to the following: Inclusion Criteria: * For hematological malignancies: Confirmed diagnosis of B-precursor B-ALL or DLBCL/Burkitt lymphoma according to World Health Organization (WHO) classification of neoplasms of the lymphoid tissues. * For solid tumor malignancies: Histologically confirmed diagnosis of neuroblastoma or Ewing sarcoma. Exclusion Criteria: * History of solid organ transplant. * Clinically significant (ie, active) cardiovascular disease. * Known history of liver cirrhosis. * Ongoing Grade \>1 peripheral neuropathy. * Demyelinating form of Charcot-Marie-Tooth disease. * Diagnosed with Down syndrome. * Ongoing graft-versus-host disease (GVHD) of any grade or receiving systemic GVHD treatment or prophylaxis. * History of human immunodeficiency virus (HIV) infection. * Contraindication or hypersensitivity to any of the study intervention components. * Received prior radiotherapy within 4 weeks of start of study intervention. Participants must have recovered from all radiation-related toxicities. * Ongoing, chronic corticosteroid therapy (exceeding 10 mg daily of prednisone equivalent). Prednisone equivalent dosing must have been stable for at least 4 weeks before Cycle 1 Day 1 (C1D1). * Received a strong cytochrome P450 3A4 (CYP3A4) inhibitor within 7 days or a strong CYP3A4 inducer within 14 days before the start of study intervention or expected requirement for chronic use of a strong CYP3A4 inhibitor or inducer during the study intervention period and for 30 days after the last dose of study intervention * Received prior systemic anticancer therapy including investigational agents within 4 weeks before the first dose of study intervention (except for prophylactic intrathecal chemotherapy and/or cytoreductive therapy with steroids/hydroxyurea. * Received a live or live-attenuated vaccine within 30 days before the first dose of study intervention. Administration of killed vaccines is allowed. * Has received an investigational agent or has used an investigational device within 4 weeks prior to study intervention administration. * Known additional malignancy that is progressing or has required active treatment within the past 1 year. * Active infection requiring systemic therapy. * Known history of Hepatitis B or known active Hepatitis C virus infection. * Participants who have not adequately recovered from major surgery or have ongoing surgical complications.

Contact & Investigator

Central Contact

Toll Free Number

✉ Trialsites@msd.com

📞 1-888-577-8839

Principal Investigator

Medical Director

STUDY DIRECTOR

Merck Sharp & Dohme LLC

Frequently Asked Questions

Who can join the NCT06395103 clinical trial?

This trial is open to participants of all sexes, aged 6 Months or older, up to 25 Years, studying B-cell Acute Lymphoblastic Leukemia. Full inclusion and exclusion criteria are listed in the Eligibility Criteria section. Always confirm your eligibility with the research team before applying.

What phase is the NCT06395103 trial and what does that mean for participants?

Phase 1 trials are the first stage of human testing. The primary goal is to assess safety and determine appropriate dosage levels. Participants are closely monitored. These trials typically involve a small number of volunteers.

Is NCT06395103 currently recruiting?

Yes, NCT06395103 is actively recruiting participants. Contact the research team at Trialsites@msd.com for enrollment information.

Where is the NCT06395103 trial being conducted?

This trial is being conducted at Los Angeles, United States, Aurora, United States, New Haven, United States, St. Petersburg, United States and 11 additional locations.

Who is sponsoring the NCT06395103 clinical trial?

NCT06395103 is sponsored by Merck Sharp & Dohme LLC. The principal investigator is Medical Director at Merck Sharp & Dohme LLC. The trial plans to enroll 90 participants.

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ClinicalMetric — Independent clinical trial intelligence platform. Not affiliated with NIH, ClinicalTrials.gov, the U.S. FDA, or any pharmaceutical company, hospital, or clinical research organization. Trial data is sourced from ClinicalTrials.gov for informational purposes only and does not constitute medical advice. Do not make any treatment, enrollment, or health decisions based solely on information found here — always consult a qualified healthcare professional. Full Disclaimer  ·  Last Reviewed: April 2026  ·  Data Methodology