Here, the authors use a mouse model of multiple sclerosis to show that CD38+Foxp3+ Treg cells persist in postinflammatory CNS tissues and are needed for maintaining immune homeostasis. These localized stress-tolerant Treg cells have developed mechanisms to exploit the limited availability of IL-2 in this tissue.
- Hsin-Hsiang Chen
- Sofia Tyystjärvi
- Thomas Korn