期刊
NATURE METHODS
卷 16, 期 2, 页码 183-+出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41592-018-0305-7
关键词
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资金
- Prostate Cancer Foundation [15CHAL02]
- National Cancer Institute [1U54 CA199090-01]
- Jane Coffin Childs Postdoctoral Fellowship
- National Institutes of Health (NIH) [R35 CA197633]
- Parker Institute for Cancer Immunotherapy
- NIH/National Center for Advancing Translational Science UCLA CTSI grant [KL2TR001882]
T cell receptor (TCR) ligand discovery is essential for understanding and manipulating immune responses to tumors. We developed a cell-based selection platform for TCR ligand discovery that exploits a membrane transfer phenomenon called trogocytosis. We discovered that T cell membrane proteins are transferred specifically to target cells that present cognate peptide-major histocompatibility complex (MHC) molecules. Co-incubation of T cells expressing an orphan TCR with target cells collectively presenting a library of peptide-MHCs led to specific labeling of cognate target cells, enabling isolation of these target cells and sequencing of the cognate TCR ligand. We validated this method for two clinically employed TCRs and further used the platform to identify the cognate neoepitope for a subject-derived neoantigen-specific TCR. Thus, target cell trogocytosis is a robust tool for TCR ligand discovery that will be useful for studying basic tumor immunology and identifying new targets for immunotherapy.
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