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Author Spotlight: Achieving High-Purity In Vitro Differentiation of Th17 Cells Using Cytokine Concentration Modulation
Published on: October 25, 2024
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AIM2 promotes TH17 cells differentiation by regulating RORγt transcription activity
Jefferson Antônio Leite1,2,3, Luísa Menezes2, Eloisa Martins2,4
1Department of Biochemistry and Immunology, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.
Iscience
|October 23, 2023
Summary
AIM2 protein promotes Th17 cell differentiation by enhancing RORγt activity. Its absence impairs Th17 cell function and reduces inflammatory disease, suggesting AIM2 as a therapeutic target.
Area of Science:
- Immunology
- Molecular Biology
Background:
- AIM2 (Absent in Melanoma 2) is an interferon-inducible DNA sensor involved in innate immunity.
- Previous research indicated AIM2's roles in regulatory T cells (Treg) and follicular T cells (Tfh).
- The function of AIM2 in T helper 17 (Th17) cell differentiation was previously unknown.
Purpose of the Study:
- To investigate the role of AIM2 in Th17 cell differentiation.
- To elucidate the molecular mechanisms by which AIM2 influences Th17 cell development.
- To assess the impact of AIM2 on Th17 cell-mediated inflammatory conditions.
Main Methods:
- Analysis of AIM2 expression in Th17 cells.
- Assessment of IL-17A production and Th17-associated protein levels (RORγt, IL-1R1, IL-23R) in AIM2-deficient cells.
- Nuclear localization and RORγt interaction studies of AIM2.
- In vivo studies using Rag1-/- mice to evaluate colitis induction.
Main Results:
- AIM2 significantly promotes Th17 cell differentiation.
- AIM2 deficiency led to decreased IL-17A production and reduced expression of RORγt, IL-1R1, and IL-23R.
- AIM2 was found in the nucleus of Th17 cells, where it enhances RORγt binding to the Il17a promoter.
- Lack of AIM2 impaired Th17 cell differentiation and reduced colitis development in vivo.
Conclusions:
- AIM2 acts as a key regulator of Th17 cell transcriptional programming.
- AIM2's function in promoting Th17 cell differentiation highlights its potential as a therapeutic target for inflammatory diseases driven by Th17 cells.
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