Abstract
The major cause of death after allogeneic Hematopoietic Stem Cell Transplantation (HSCT) for acute myeloid leukemia (AML) is disease relapse. We investigated the expression of Inhibitory Receptors (IR; PD-1/CTLA-4/TIM-3/LAG-3/2B4/KLRG1/GITR) on T cells infiltrating the bone marrow (BM) of 32 AML patients relapsing (median 251 days) or maintaining complete remission (CR; median 1 year) after HSCT. A higher proportion of early-differentiated Memory Stem (TSCM) and Central Memory BM-T cells express multiple IR in relapsing patients than in CR patients. Exhausted BM-T cells at relapse display a restricted TCR repertoire, impaired effector functions and leukemia-reactive specificities. In 57 patients, early detection of severely exhausted (PD-1+Eomes+T-bet-) BM-TSCM predicts relapse. Accordingly, leukemia-specific T cells in patients prone to relapse display exhaustion markers, absent in patients maintaining long-term CR. These results highlight a wide, though reversible, immunological dysfunction in the BM of AML patients relapsing after HSCT and suggest new therapeutic opportunities for the disease.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Adult
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Antigens, CD / genetics
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Antigens, CD / immunology
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Antineoplastic Agents / therapeutic use
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Bone Marrow Cells / immunology
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Bone Marrow Cells / pathology
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CTLA-4 Antigen / genetics
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CTLA-4 Antigen / immunology
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Clonal Anergy*
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Female
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Gene Expression Regulation, Leukemic*
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Glucocorticoid-Induced TNFR-Related Protein / genetics
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Glucocorticoid-Induced TNFR-Related Protein / immunology
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Hematopoietic Stem Cell Transplantation*
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Hepatitis A Virus Cellular Receptor 2 / genetics
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Hepatitis A Virus Cellular Receptor 2 / immunology
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Humans
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Immunologic Memory / genetics*
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Leukemia, Myeloid, Acute / genetics
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Leukemia, Myeloid, Acute / immunology*
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Leukemia, Myeloid, Acute / pathology
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Leukemia, Myeloid, Acute / therapy
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Lymphocyte Activation Gene 3 Protein
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Male
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Middle Aged
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Programmed Cell Death 1 Receptor / genetics
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Programmed Cell Death 1 Receptor / immunology
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Receptors, KIR / genetics
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Receptors, KIR / immunology
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Recurrence
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Remission Induction
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Retrospective Studies
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Signal Transduction
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Signaling Lymphocytic Activation Molecule Family / genetics
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Signaling Lymphocytic Activation Molecule Family / immunology
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T-Lymphocytes / immunology*
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T-Lymphocytes / pathology
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Transplantation, Homologous
Substances
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Antigens, CD
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Antineoplastic Agents
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CD244 protein, human
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CTLA-4 Antigen
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Glucocorticoid-Induced TNFR-Related Protein
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HAVCR2 protein, human
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Hepatitis A Virus Cellular Receptor 2
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PDCD1 protein, human
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Programmed Cell Death 1 Receptor
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Receptors, KIR
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Signaling Lymphocytic Activation Molecule Family
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TNFRSF18 protein, human
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Lymphocyte Activation Gene 3 Protein
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Lag3 protein, human