T reg cell-intrinsic requirements for ST2 signaling in health and neuroinflammation.
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 γδT 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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Related Subject Headings
- T-Lymphocytes, Regulatory
- Signal Transduction
- Neurons
- Mice
- Male
- Interleukin-33
- Interleukin-17
- Interleukin-1 Receptor-Like 1 Protein
- Inflammation
- Immunology
Citation
Published In
DOI
EISSN
Publication Date
Volume
Issue
Location
Related Subject Headings
- T-Lymphocytes, Regulatory
- Signal Transduction
- Neurons
- Mice
- Male
- Interleukin-33
- Interleukin-17
- Interleukin-1 Receptor-Like 1 Protein
- Inflammation
- Immunology