IL-2 Receptor Signaling Is Essential for the Development of Klrg1+ Terminally Differentiated T Regulatory Cells
- 15 August 2012
- journal article
- Published by The American Association of Immunologists in The Journal of Immunology
- Vol. 189 (4), 1780-1791
- https://doi.org/10.4049/jimmunol.1103768
Abstract
Thymic-derived natural T regulatory cells (Tregs) are characterized by functional and phenotypic heterogeneity. Recently, a small fraction of peripheral Tregs has been shown to express Klrg1, but it remains unclear as to what extent Klrg1 defines a unique Treg subset. In this study, we show that Klrg1+ Tregs represent a terminally differentiated Treg subset derived from Klrg1− Tregs. This subset is a recent Ag-responsive and highly activated short-lived Treg population that expresses enhanced levels of Treg suppressive molecules and that preferentially resides within mucosal tissues. The development of Klrg1+ Tregs also requires extensive IL-2R signaling. This activity represents a distinct function for IL-2, independent from its contribution to Treg homeostasis and competitive fitness. These and other properties are analogous to terminally differentiated short-lived CD8+ T effector cells. Our findings suggest that an important pathway driving Ag-activated conventional T lymphocytes also operates for Tregs.Keywords
This publication has 50 references indexed in Scilit:
- Response to self antigen imprints regulatory memory in tissuesNature, 2011
- Interleukin-2 Receptor Signaling: At the Interface between Tolerance and ImmunityImmunity, 2010
- The transcription factor T-bet controls regulatory T cell homeostasis and function during type 1 inflammationNature Immunology, 2009
- Regulatory T Cells Sequentially Migrate from Inflamed Tissues to Draining Lymph Nodes to Suppress the Alloimmune ResponseImmunity, 2009
- A Low Interleukin-2 Receptor Signaling Threshold Supports the Development and Homeostasis of T Regulatory CellsImmunity, 2009
- Regulatory T-cell suppressor program co-opts transcription factor IRF4 to control TH2 responsesNature, 2009
- Linked T Cell Receptor and Cytokine Signaling Govern the Development of the Regulatory T Cell RepertoireImmunity, 2008
- A Two-Step Process for Thymic Regulatory T Cell DevelopmentImmunity, 2008
- Heterogeneity and Cell-Fate Decisions in Effector and Memory CD8+ T Cell Differentiation during Viral InfectionImmunity, 2007
- Inflammation Directs Memory Precursor and Short-Lived Effector CD8+ T Cell Fates via the Graded Expression of T-bet Transcription FactorImmunity, 2007