STAT6 controls the stability and suppressive function of regulatory T cells

Abstract: Signal transducer and activator of transcription 6 (STAT6) promotes tumorigenesis by decreasing the Forkhead box P3+ (Foxp3+) cell frequency allowing for the infiltration of inflammatory cells during the early stages of colitis‐associated cancer (CAC). In this study, we dissected the role of STAT6 in the generation of inducible in vitro regulatory T cells (iTregs) and peripheral in vivo Tregs (pTregs) under inflammatory conditions. In in vitro assays, when STAT6 was lacking, iTregs preserved a stable phenotype and expressed high levels of Foxp3 and CD25 during long expansion periods, even in the presence of IL‐6. This effect was associated with increased in vitro suppressive ability, over‐expression of programmed death‐1 (PD‐1), CTLA‐4, and Foxp3, and decreased IFN‐γ expression. Furthermore, iTregs developed during STAT6 deficiency showed a higher demethylation status for the FOXP3 Treg‐specific demethylated region (TSDR), coupled with lower DNA methyltransferase 1 (DNMT1) mRNA expression, suggesting that STAT6 may lead to Foxp3 silencing. Using a mouse model of CAC, the STAT6‐/‐ pTregs expressed a more activated phenotype at the intestine, had higher suppressive capacity, and expressed more significant levels of PD‐1 and latency‐associated peptide of TGF‐β (LAP) associated with their ability to attenuate tumor development. These data suggest that STAT6 signaling impairs the induction, stability, and suppressive capacity of Tregs developed in vitro or in vivo during gut inflammation.

Location
Deutsche Nationalbibliothek Frankfurt am Main
Extent
Online-Ressource
Language
Englisch

Bibliographic citation
STAT6 controls the stability and suppressive function of regulatory T cells ; day:03 ; month:03 ; year:2023 ; extent:17
European journal of immunology ; (03.03.2023) (gesamt 17)

Creator
Arroyo‐Olarte, Rubén D.
Rivera‐Rugeles, Ana
Nava‐Lira, Eduardo
Sánchez‐Barrera, Ángel
Ledesma‐Soto, Yadira
Saavedra, Rafael
Armas‐López, Leonel
Terrazas, Luis I.
Ávila‐Moreno, Federico
Leon‐Cabrera, Sonia

DOI
10.1002/eji.202250128
URN
urn:nbn:de:101:1-2023030314394470483722
Rights
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Last update
14.08.2025, 10:55 AM CEST

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Associated

  • Arroyo‐Olarte, Rubén D.
  • Rivera‐Rugeles, Ana
  • Nava‐Lira, Eduardo
  • Sánchez‐Barrera, Ángel
  • Ledesma‐Soto, Yadira
  • Saavedra, Rafael
  • Armas‐López, Leonel
  • Terrazas, Luis I.
  • Ávila‐Moreno, Federico
  • Leon‐Cabrera, Sonia

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