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Abstract
Interleukin 2 (IL-2) is a key homeostatic cytokine, with therapeutic applications in both immunogenic and tolerogenic immune modulation. Clinical use has been hampered by pleiotropic functionality and widespread receptor expression, with unexpected adverse events. Here, we developed a novel mouse strain to divert IL-2 production, allowing identification of contextual outcomes. Network analysis identified priority access for Tregs and a competitive fitness cost of IL-2 production among both Tregs and conventional CD4 T cells. CD8 T and NK cells, by contrast, exhibited a preference for autocrine IL-2 production. IL-2 sourced from dendritic cells amplified Tregs, whereas IL-2 produced by B cells induced two context-dependent circuits: dramatic expansion of CD8+ Tregs and ILC2 cells, the latter driving a downstream, IL-5-mediated, eosinophilic circuit. The source-specific effects demonstrate the contextual influence of IL-2 function and potentially explain adverse effects observed during clinical trials. Targeted IL-2 production therefore has the potential to amplify or quench particular circuits in the IL-2 network, based on clinical desirability.
Original language | English |
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Article number | e20212391 |
Number of pages | 30 |
Journal | The Journal of Experimental Medicine |
Volume | 219 |
Issue number | 7 |
Early online date | 14 Jun 2022 |
DOIs | |
Publication status | Published - 4 Jul 2022 |
Bibliographical note
© 2022 Whyte et al.Keywords
- Animals
- Immunity, Innate
- Interleukin-2/biosynthesis
- Killer Cells, Natural/immunology
- Mice
- T-Lymphocytes, Regulatory/immunology
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Negative feedback control of T cells in tolerance and cancer - from pathways to biomarkers
Bending, D. (Principal Investigator)
1/02/21 → 31/01/27
Project: Research Councils