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25BT056: Basket Study of Viral Cytotoxic T Lymphocytes
Sponsor: Children's Hospital of Philadelphia
Summary
This study is evaluating the safety and effectiveness of virus-specific cytotoxic T lymphocytes (vCTLs) for treating difficult-to-control viral infections caused by cytomegalovirus (CMV), adenovirus (ADV), Epstein-Barr virus (EBV), or BK virus in children, adolescents, and young adults with weakened immune systems. Eligible participants include recipients of hematopoietic stem cell transplantation, solid organ transplantation, and patients with primary immunodeficiency disorders. vCTLs are immune cells collected from a related donor and selected to recognize and fight specific viruses. The cells are manufactured using the CliniMACS® Cytokine Capture System and administered by intravenous infusion. Additional infusions may be given if viral infection persists. The study will assess the safety of vCTL therapy, including the risk of graft-versus-host disease (GVHD) and infusion-related reactions, as well as its ability to reduce viral infection, improve clinical outcomes, and support survival. Participants will be monitored for approximately 12 weeks after their final vCTL infusion. Participants will all receive vCTLs; there is no comparison group. Participants will: 1. Have donor-derived vCTLs manufactured for infusion using the CliniMACS Cytokine Capture System 2. Receive the vCTLs through an intravenous infusion 3. Be monitored for side effects and infusion reactions, viral levels through blood testing, clinical outcomes, including response to treatment, survival, and time without detectable virus
Official title: 25BT056: Basket Study of Viral Cytotoxic T Lymphocytes in Children, Adolescents and Young Adults With Viral Infection Following Allogeneic Hematopoietic Stem Cell Transplant, Solid Organ Transplant or in Primary Immunodeficiencies
Key Details
Gender
All
Age Range
0 Years - 29 Years
Study Type
INTERVENTIONAL
Enrollment
35
Start Date
2026-11-01
Completion Date
2037-11
Last Updated
2026-10-14
Healthy Volunteers
No
Conditions
Interventions
Virus-Specific Cytotoxic T Lymphocytes (vCTLs)
Donor-derived virus-specific cytotoxic T lymphocytes (vCTLs) targeting one or more of cytomegalovirus (CMV), adenovirus (ADV), Epstein-Barr virus (EBV), and BK virus. Cells are manufactured using the CliniMACS® Prodigy and CliniMACS Cytokine Capture System (IFN-γ) following stimulation with virus-specific PepTivator® peptide pools. vCTLs are administered by IV infusion at a dose of 2-3 × 10\^4 CD3+ cells/kg recipient weight for HLA-matched related donors or 0.4-0.6 × 10\^4 CD3+ cells/kg recipient weight for HLA-mismatched related donors. Additional infusions of the same dose may be administered every 2 weeks in subjects with ongoing clinically significant viral infection who continue to meet infusion eligibility criteria, for up to 5 total infusions. The intervention is intended for treatment of refractory viral infections in patients with inherited or acquired immunodeficiencies, including recipients of hematopoietic stem cell transplant.