期刊
JOURNAL OF EXPERIMENTAL MEDICINE
卷 218, 期 2, 页码 -出版社
ROCKEFELLER UNIV PRESS
DOI: 10.1084/jem.20201234
关键词
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资金
- National Institutes of Health/National Cancer Institute [P30 CA008748]
- National Institutes of Health [AI034206]
- Ludwig Center at the Memorial Sloan Kettering Cancer Center
The study suggests that ST2 expression on regulatory T cells is not essential for their accumulation and residence in nonlymphoid organs, but cell-intrinsic sensing of IL-33 contributes to cytokine production in certain tissues. Additionally, regulatory T cells play a crucial role in limiting IL-17A-producing gammadelta T cells in the central nervous system.
ST2, the receptor for the alarmin IL-33, is expressed by a subset of regulatory T (T reg) cells residing in nonlymphoid tissues, and these cells can potently expand upon provision of exogenous IL-33. Whether the accumulation and residence of T reg cells in tissues requires their cell-intrinsic expression of and signaling by ST2, or whether indirect IL-33 signaling acting on other cells suffices, has been a matter of contention. Here, we report that ST2 expression on T reg cells is largely dispensable for their accumulation and residence in nonlymphoid organs, including the visceral adipose tissue (VAT), even though cell-intrinsic sensing of IL-33 promotes type 2 cytokine production by VAT-residing T reg cells. In addition, we uncovered a novel ST2-dependent role for T reg cells in limiting the size of IL-17A-producing gamma delta T cells in the CNS in a mouse model of neuroinflammation, experimental autoimmune encephalomyelitis (EAE). Finally, ST2 deficiency limited to T reg cells led to disease exacerbation in EAE.
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