title: Immune evasion strategies of pediatric precursor-B acute lymphoblastic leukemia after allogeneic bone marrow transplantation-a case study.
abstract: Bone marrow transplantation (BMT) is the primary curative option for refractory/relapsed pediatric acute lymphoblastic leukemia. Although post-transplantation relapse remains a frequent cause of transplantation failure, the mechanisms underlying this are poorly understood. In this study, we compared allogeneic T cell stimulation induced by sequentially obtained precursor-B acute lymphoblastic leukemia (ALL) samples from a single patient with overt graft versus leukemia (GVL) activity. We observed a loss of T cell stimulatory capacity by post-transplantation relapse samples and changes in expression of MHC and the costimulatory molecule CD137 ligand. This study suggests that escape from immune mechanisms after withdrawal of immune suppression is important to ALL progression.
authors.affiliation: Department of Pediatrics, Division of Hematology/Oncology/Bone Marrow Transplantation, University of British Columbia and British Columbia's Children's Hospital, Vancouver, BC, Canada.
authors.forename: Draga
authors.initials: D
authors.lastname: Barbaric
authors.forename: Kristin
authors.initials: K
authors.lastname: Wynne
authors.forename: Soudabeh
authors.initials: S
authors.lastname: Aslanian
authors.forename: Mason
authors.initials: M
authors.lastname: Bond
authors.forename: Gregor S D
authors.initials: GS
authors.lastname: Reid
mesh_terms: D000293:Adolescent; D015703:Antigens, CD; D016026:Bone Marrow Transplantation / Q000009:adverse effects* / Q000276:immunology; D017809:Fatal Outcome; D006801:Humans; D008297:Male; D015452:Precursor B-Cell Lymphoblastic Leukemia-Lymphoma / Q000150:complications* / Q000175:diagnosis / Q000276:immunology*; D017475:Receptors, Nerve Growth Factor / Q000276:immunology; D018124:Receptors, Tumor Necrosis Factor / Q000276:immunology; D012008:Recurrence; D013601:T-Lymphocytes / Q000276:immunology; D019139:Tumor Escape / Q000276:immunology*; D053261:Tumor Necrosis Factor Receptor Superfamily, Member 9
chemical_list: D015703:Antigens, CD; D017475:Receptors, Nerve Growth Factor; D018124:Receptors, Tumor Necrosis Factor; C505714:TNFRSF9 protein, human; D053261:Tumor Necrosis Factor Receptor Superfamily, Member 9