Cited by 98T-cell and B-cell ImmunologySirtuins and Resveratrol in MedicineFOXO transcription factor regulation

Analysis of sirtuin 1 expression reveals a molecular explanation of IL-2-mediated reversal of T-cell tolerance

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Gao, Beixue, Kong, Qingfei, Kemp, Kyeorda, Zhao, Yuan-Si, Fang, Deyu·2012·Proceedings of the National Academy of Sciences

Abstract

The type III histone deacetylase sirtuin 1 (Sirt1) is a suppressor of both innate and adoptive immune responses. We have recently found that Sirt1 expression is highly induced in anergic T cells. However, the transcriptional program to regulate Sirt1 expression in T cells remains uncharacterized. Here we report that the early responsive genes 2 and 3, which can be up-regulated by T-cell receptor-mediated activation of nuclear factor of activated T-cell transcription factors and are involved in peripheral T-cell tolerance, bind to the sirt1 promoter to transcript sirt1 mRNA. In addition, the forkhead transcription factor, FoxO3a, interacts with early responsive genes 2/3 on the sirt1 promoter to synergistically regulate Sirt1 expression. Interestingly, IL-2, a cytokine that can reverse T-cell anergy, suppresses sirt1 transcription by sequestering FoxO3a to the cytoplasm through activating the PI3K-AKT pathway. Expression of the constitutively active form of FoxO3a blocks IL-2–mediated reversal of T-cell tolerance by retaining sirt1 expression. Our findings here provide a molecular explanation of IL-2–mediated reversion of T-cell anergy.

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Crossref · 10.1073/pnas.1118462109

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  • Epigenetic factors including IKAROS (via acetylation) and Sirt1 participate in histone modifications that promote T cell anergy.

    “Epigenetic factors such as IKAROS (through acetylation) [25] and Sirt1 are involved in histone modifications that promote T cell anergy [26,27].”

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Authors
Gao, B., Kong, Q., Kemp, K., Zhao, Y.-S., & Fang, D.
Affiliations
Northwestern University (US)
Venue
Proceedings of the National Academy of Sciences
Published
2012-01-04
Volume
109
Issue
3
Pages
899-904
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W1998420407
Cited by
98
References
37
Citations by year
2026: 5 · 2025: 5 · 2024: 6 · 2023: 3 · 2022: 7 · 2021: 11 · 2020: 8 · 2019: 4 · 2018: 5 · 2017: 5 · 2016: 5 · 2015: 8 · 2014: 6 · 2013: 15 · 2012: 5
FWCI
4.76
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute of General Medical Sciences (K12GM088020)
  • National Institute of Allergy and Infectious Diseases (R01AI079056)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK083050, DP2DK083050)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
  • Health Sciences › Medicine › Geriatrics and Gerontology › Sirtuins and Resveratrol in Medicine
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › FOXO transcription factor regulation
Keywords
SIRT1, interleukin-2, T cell anergy, T cell tolerance, FOXO3, NFAT transcription factors, forkhead transcription factor, PI3K/Akt signaling, histone deacetylase, T cell receptor signaling
MeSH terms
Forkhead Box Protein O3, Animals, Base Sequence, Cells, Cultured, Gene Expression Regulation, Immune Tolerance, Interleukin-2, Molecular Sequence Data, Phosphorylation, Protein Binding, T-Lymphocytes, Transcription, Genetic, CD4-Positive T-Lymphocytes, Clonal Anergy, Models, Immunological, Mice, Early Growth Response Protein 2, Early Growth Response Protein 3, Forkhead Transcription Factors, Sirtuin 1

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