期刊
NATURE COMMUNICATIONS
卷 12, 期 1, 页码 -出版社
NATURE PORTFOLIO
DOI: 10.1038/s41467-021-26134-w
关键词
-
资金
- German Research Council [335447717, RI 2952/1-1, RI 2616/3-1, 240245660, FOR2879 TO235/11-1]
- Hamburg State Excellence Research Program
- Werner Otto Foundation
- UKE intramural programs FFM
- University of Hamburg
Immune cells at sites of inflammation are continuously activated by local antigens and cytokines, and regulatory mechanisms must be enacted to control inflammation. Human effector CD8 T cells contribute to adenosine production by releasing CD73-containing extracellular vesicles, which suppress immune responses independently of regulatory T cells. The study suggests that these extracellular vesicles derived from CD8 T cells serve as intrinsic regulators of immune responses in inflamed tissues.
Immune cells at sites of inflammation are continuously activated by local antigens and cytokines, and regulatory mechanisms must be enacted to control inflammation. The stepwise hydrolysis of extracellular ATP by ectonucleotidases CD39 and CD73 generates adenosine, a potent immune suppressor. Here we report that human effector CD8 T cells contribute to adenosine production by releasing CD73-containing extracellular vesicles upon activation. These extracellular vesicles have AMPase activity, and the resulting adenosine mediates immune suppression independently of regulatory T cells. In addition, we show that extracellular vesicles isolated from the synovial fluid of patients with juvenile idiopathic arthritis contribute to T cell suppression in a CD73-dependent manner. Our results suggest that the generation of adenosine upon T cell activation is an intrinsic mechanism of human effector T cells that complements regulatory T cell-mediated suppression in the inflamed tissue. Finally, our data underscore the role of immune cell-derived extracellular vesicles in the control of immune responses. Ectonucleotidases associated to regulatory T cells are known modulators in the inflammatory environment. Here the authors describe CD8 T cell-derived extracellular vesicles bearing CD73 and suggest they function as an additional intrinsic modulator of immune responses.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据