Sarah A. Weiss, Amy Y. Huang, Megan E. Fung, Daniela Martinez, Alex C. Y. Chen, Thomas J. LaSalle, Brian C. Miller, Christopher D. Scharer, Mudra Hegde, Thao H. Nguyen, Jared H. Rowe, Jossef F. Osborn, Dillon G. Patterson, Natalia Sifnugel, C. Mei-An Nolan, Richard A. Davidson, Marc A. Schwartz, Alexander P. R. Bally, Dennis K. Neeld, Martin W. LaFleur, Jeremy M. Boss, John G. Doench, W. Nicholas Haining, Arlene H. Sharpe, Debattama R. Sen
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引用次数: 0
Abstract
PD-1 is a key negative regulator of CD8+ T cell activation and is highly expressed by exhausted T cells in cancer and chronic viral infection. Although PD-1 blockade can improve viral and tumor control, physiological PD-1 expression prevents immunopathology and improves memory formation. The mechanisms driving high PD-1 expression in exhaustion are not well understood and could be critical to disentangling its beneficial and detrimental effects. Here, we functionally interrogated the epigenetic regulation of PD-1 using a mouse model with deletion of an exhaustion-specific PD-1 enhancer. Enhancer deletion exclusively alters PD-1 expression in CD8+ T cells in chronic infection, creating a ‘sweet spot’ of intermediate expression where T cell function is optimized compared to wild-type and Pdcd1-knockout cells. This permits improved control of chronic infection without additional immunopathology. Together, these results demonstrate that tuning PD-1 via epigenetic editing can reduce CD8+ T cell dysfunction while avoiding excess immunopathology. PD-1 is a critical modulator of CD8+ T cell activation and exhaustion. Sen and colleagues show that a cell-state-specific enhancer tunes PD-1 expression exclusively in exhaustion and that deletion of this enhancer improves CD8+ T cell function.
期刊介绍:
Nature Immunology is a monthly journal that publishes the highest quality research in all areas of immunology. The editorial decisions are made by a team of full-time professional editors. The journal prioritizes work that provides translational and/or fundamental insight into the workings of the immune system. It covers a wide range of topics including innate immunity and inflammation, development, immune receptors, signaling and apoptosis, antigen presentation, gene regulation and recombination, cellular and systemic immunity, vaccines, immune tolerance, autoimmunity, tumor immunology, and microbial immunopathology. In addition to publishing significant original research, Nature Immunology also includes comments, News and Views, research highlights, matters arising from readers, and reviews of the literature. The journal serves as a major conduit of top-quality information for the immunology community.