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- W2021986444 abstract "Abstract To determine whether the leukemia-associated Wilms tumor antigen (WT1) contributes to a graft-versus-leukemia (GVL) effect after allogeneic stem-cell transplantation (SCT) for acute lymphoblastic leukemia (ALL), we studied CD8+ T-cell responses to WT1 in 10 human lymphocyte antigen (HLA)–A*0201–positive ALL patients during the early phase of immune recovery after SCT (days 30-120). Seven of 10 patients had detectable WT1 expression in their peripheral blood (PB) before SCT by quantitative reverse-transcription polymerase chain reaction. Using WT1/HLA-A*0201 tetramers and intracellular interferon-γ (IFN-γ) staining, WT1+ CD8+ T-cell responses after SCT were found only in patients with detectable WT1 expression before SCT (5 of 7 vs. 0 of 3; P < .05). To monitor the kinetics of WT1+ CD8+ T-cell responses and disease regression after SCT, absolute WT1+ CD8+ T-cell numbers and WT1 expression were studied for each time point. The emergence of WT1+ CD8+ T cells was associated with a decrease in WT1 expression, suggesting a WT1-driven GVL effect. Loss of WT1+ CD8+ T-cell responses was associated with reappearance of WT1 transcripts, consistent with a molecular relapse (P < .001). WT1+ CD8+ T cells had a predominantly effector–memory phenotype (CD45RO+ CD27−CD57+) and produced IFN-γ. Our results support the immunogenicity of WT1 after SCT for ALL and highlight the potential for WT1 vaccines to boost GVL after SCT for ALL." @default.
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- W2021986444 date "2007-09-15" @default.
- W2021986444 modified "2023-10-02" @default.
- W2021986444 title "Graft-versus-leukemia effects associated with detectable Wilms tumor-1–specific T lymphocytes after allogeneic stem-cell transplantation for acute lymphoblastic leukemia" @default.
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- W2021986444 doi "https://doi.org/10.1182/blood-2007-03-076844" @default.
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