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Updated: Jul 14, 2025

07:12
Mouse Naïve CD4+ T Cell Isolation and In vitro Differentiation into T Cell Subsets
Published on: April 16, 2015
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IL-2-induced Stat3 Signaling is Critical for Effector Treg Cell Programming
Biorxiv : the Preprint Server for Biology
|October 9, 2023
Summary
Interleukin-2 (IL-2) signaling early in T cell development programs effector regulatory T (eTreg) cells to produce IL-10, crucial for gut immune tolerance. This IL-2-induced Stat3 pathway is vital for eTreg cell differentiation and IL-10 production.
Area of Science:
- Immunology
- Cell Biology
- Microbiome Research
Background:
- Immune homeostasis in the gut relies on effector regulatory T (eTreg) cells derived from induced (i)Treg cells.
- eTreg cells produce IL-10, essential for immune tolerance towards commensal microbes.
Approach:
- Investigated the role of IL-2-induced Stat3 signaling in iTreg cell programming for eTreg cell differentiation.
- Utilized an IL-2 mutein with reduced affinity for the IL-2Rγ chain to assess IL-2 signaling impact.
Key Points:
- IL-2 signaling, via Stat3, is necessary and sufficient for eTreg cell development and IL-10 production.
- Absence of IL-2-induced Stat3 signaling impairs eTreg cell differentiation and IL-10 production.
- Reduced IL-2Rγ affinity blunts IL-2R Stat3 output, hindering IL-10 transcriptional programming.
Conclusions:
- IL-2 signaling acts early to program subsequent IL-10 production by developing eTreg cells via Stat3.
- This pathway is critical for establishing immune tolerance to the gut microbiota.
- Findings have significant implications for IL-2-based therapies in immune-mediated diseases.
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