RecruitingNot ApplicableNCT07488728

Letermovir Prophylaxis in Children With EBV-Positive T/NK-Cell Lymphoproliferative Disease and Refractory/Relapsed EBV-Associated Hemophagocytic Lymphohistiocytosis

Impact of Letermovir Prophylaxis on Viral Infections After Allogeneic Hematopoietic Stem Cell Transplantation in Children With EBV-Positive T/NK-Cell Lymphoproliferative Disease and Refractory/Relapsed EBV-Associated Hemophagocytic Lymphohistiocytosis

Sponsor

Beijing Children's Hospital

Enrollment

80 participants

Start Date

Oct 1, 2025

Study Type

INTERVENTIONAL

Conditions

EBV-associated T/NK-cell Lymphoproliferative Diseases Refractory/Relapsed EBV-related Hemophagocytic Lymphohistiocytosis Letermovir

Summary

This study investigates the impact of letermovir prophylaxis on viral infections (including CMV, EBV, BKV, HHV-6/7, RSV, ADV, HSV, etc.) following allogeneic hematopoietic stem cell transplantation in pediatric patients with EBV-associated T/NK-cell lymphoproliferative diseases and refractory/relapsed EBV-related hemophagocytic lymphohistiocytosis. Additionally, we examine its effects on other transplantation complications, including engraftment failure, graft-versus-host disease (GvHD), disease relapse, thrombotic microangiopathy (TMA), overall survival (OS), post-transplant lymphoproliferative disorder (PTLD) incidence, and immune reconstitution.

Eligibility

Max Age: 18 Years

Plain Language Summary

Simplified for easier understanding

This clinical trial is studying a drug called Letermovir for people with ebv-associated t/nk-cell lymphoproliferative diseases, letermovir, and other related conditions. The study is currently recruiting participants at 1 location. People eligible for this study include up to age 18 Years.

This summary was AI-generated to explain the trial in plain language. It is not medical advice. Always discuss eligibility with your doctor before enrolling in a clinical trial.

Interested in this trial?

Get notified about updates and connect with the research team.

Interventions

DRUGLetermovir

Arm 1 (Letermovir Prophylaxis): Pediatric patients receive oral letermovir once daily from day 0 to day 100 post-transplant. Prophylaxis may be extended to day 200 if high-risk factors persist (steroid use, poor immune reconstitution). Dosing: 480mg (≥30kg), 240mg (15-30kg), 120mg (7.5-15kg), 80mg (6-7.5kg); halved if co-administered with cyclosporine. Arm 2 (Control): Historical control cohort (2018-2023) receiving no routine CMV prophylaxis; preemptive therapy with ganciclovir/foscarnet initiated only when plasma PCR exceeds threshold.

Locations(1)

Beijing Children's Hospital, Capital Medical University

Beijing, Beijing Municipality, China

View Full Details on ClinicalTrials.gov

For the most up-to-date information, visit the official listing.

Visit

NCT07488728