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Regulatory T cells: Therapeutic Potential for Treating Transplant Rejection and Type I Diabetes
16:26

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Published on: August 20, 2007

Negative regulators take center stage.

Silvia Monticelli1, Federica Sallusto

  • 1Institute for Research in Biomedicine, Bellinzona, Switzerland. silvia.monticelli@irb.usi.ch

Nature Immunology
|July 21, 2012
PubMed
Summary
This summary is machine-generated.

The transcription factor Aiolos, regulated by STAT3 and AhR, silences interleukin 2 gene expression in T cells. This epigenetic mechanism safeguards T helper 17 cell differentiation.

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10:44

In Vitro Selection of Engineered Transcriptional Repressors for Targeted Epigenetic Silencing

Published on: May 5, 2023

Area of Science:

  • Immunology
  • Molecular Biology
  • Epigenetics

Background:

  • T helper cell differentiation is crucial for adaptive immunity.
  • Interleukin 2 (IL-2) plays a key role in T cell regulation.
  • Aberrant T cell differentiation contributes to autoimmune diseases.

Purpose of the Study:

  • To investigate the role of the transcription factor Aiolos in T helper cell differentiation.
  • To elucidate the regulatory mechanisms controlling Aiolos expression and function.
  • To understand how Aiolos influences interleukin 2 gene expression and TH17 cell development.

Main Methods:

  • Analysis of T lymphocyte populations.
  • Quantitative PCR and Western blotting to assess gene and protein expression.
  • Chromatin immunoprecipitation assays to study epigenetic modifications.
  • Flow cytometry to determine T cell subset differentiation.

Main Results:

  • Aiolos expression is upregulated in T lymphocytes.
  • Aiolos upregulation is dependent on STAT3 and AhR transcription factors.
  • Aiolos induces epigenetic silencing of the interleukin 2 gene.
  • This silencing acts as a safeguard for TH17 cell differentiation.

Conclusions:

  • Aiolos functions as a critical regulator of T helper cell differentiation.
  • The STAT3/AhR-Aiolos pathway epigenetically controls IL-2 expression.
  • This mechanism ensures proper development of the TH17 cell subset, preventing immune dysregulation.