期刊
NATURE MEDICINE
卷 24, 期 9, 页码 1459-+出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41591-018-0135-2
关键词
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资金
- institutional start-up funds from Duke University Medical Center
- Sontag Foundation Distinguished Scientist Award
- National Institutes of Health [R01NS099096]
T cell dysfunction contributes to tumor immune escape in patients with cancer and is particularly severe amidst glioblastoma (GBM). Among other defects, T cell lymphopenia is characteristic, yet often attributed to treatment. We reveal that even treatment-naive subjects and mice with GBM can harbor AIDS-level CD4 counts, as well as contracted, T cell-deficient lymphoid organs. Missing naive T cells are instead found sequestered in large numbers in the bone marrow. This phenomenon characterizes not only GBM but a variety of other cancers, although only when tumors are introduced into the intracranial compartment. T cell sequestration is accompanied by tumor-imposed loss of S1P1 from the T cell surface and is reversible upon precluding S1P1 internalization. In murine models of GBM, hindering S1P1 internalization and reversing sequestration licenses T cell-activating therapies that were previously ineffective. Sequestration of T cells in bone marrow is therefore a tumor-adaptive mode of T cell dysfunction, whose reversal may constitute a promising immunotherapeutic adjunct.
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