Phase 3 Study Comparing Intravenous Brincidofovir to Intravenous Cidofovir for Adenovirus Infection Treatment After Allogeneic Stem Cell Transplant in Children and Adults

What this Trial Is About

Researchers are evaluating intravenous brincidofovir IV BCV compared to intravenous cidofovir IV CDV for treating adenovirus infection in children and adults who have received allogeneic hematopoietic cell transplants allo-HCT. This Phase 3, multi-center, randomized, open-label study focuses on patients with adenovirus viremia, aiming to assess the effectiveness of these treatments in clearing the virus. The study uses a virologic response-driven approach to determine treatment duration, following ECIL guidelines for high-risk patients. Participants will be randomly assigned to receive either IV BCV or IV CDV. Treatment will continue until adenovirus DNA in plasma is undetectable for two consecutive tests spaced 7 days apart or until a maximum of 12 weeks of therapy is reached, whichever occurs first. Subjects who clear the virus may stop treatment but can be retreated with their assigned drug if adenovirus viremia recurs at defined levels. The study prohibits switching between the two drugs. Safety will be monitored by an independent board during enrollment. Throughout the study, participants will be assessed weekly until the end of treatment, with additional evaluations at 4 weeks after the last dose and at 12 and 24 weeks post-randomization. Researchers will collect plasma samples to measure drug concentrations and monitor viral response and safety. All participants will be followed for a total of 24 weeks regardless of treatment duration, ensuring comprehensive monitoring of efficacy and safety during and after therapy.

A Phase 3 Trial to Compare IV BCV Versus IV CDV for Treatment of Adenovirus Infection After Allo-HCT