Abstract
Checkpoint blockade immunotherapies, such as anti-programmed death-1 (PD-1), unleash anti-tumor CD8+ T cell responses but may also induce immunosuppressive regulatory T cells (Tregs). In this issue of Cancer Cell, Geels et al. uncover that anti-PD-1 leads to Treg expansion via interleukin-2 (IL-2)-producing CD8+ T cells. Combining anti-PD-1 with anti-ICOSL interrupts this crosstalk, thereby enhancing tumor control.
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MeSH terms
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Animals
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CD8-Positive T-Lymphocytes* / immunology
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Humans
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Immune Checkpoint Inhibitors / pharmacology
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Immune Checkpoint Inhibitors / therapeutic use
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Immunotherapy / methods
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Interleukin-2 / immunology
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Neoplasms / immunology
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Programmed Cell Death 1 Receptor / antagonists & inhibitors
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Programmed Cell Death 1 Receptor / immunology
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T-Lymphocytes, Regulatory* / immunology
Substances
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Programmed Cell Death 1 Receptor
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Interleukin-2
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Immune Checkpoint Inhibitors