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The effect of programmed death 1 (PD-1) on cytomegalovirus (CMV)-specific T cells has not been thoroughly examined. We evaluated the involvement of exhausted CMV-specific T cells in persistent CMV infection after allogeneic hematopoietic stem cell transplantation (HSCT). CMV-specific CD8 + T cells obtained from an HLA-A ∗ 24:02-positive patient, who failed to eliminate CMV for more...
A case of leukemia escape from an HLA-specific cytotoxic T lymphocyte (CTL) response in a recipient of bone marrow transplantation is presented. Only the expression of HLA-B51, which was a mismatched HLA locus in the graft-versus-host direction, was down-regulated in post-transplant leukemia blasts compared with that in pre-transplant blasts. All CTL clones, that were isolated from the recipient’s...
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