Author
Listed:
- Martin G. Scherm
(Helmholtz Diabetes Center at Helmholtz Zentrum München
Deutsches Zentrum für Diabetesforschung (DZD))
- Isabelle Serr
(Helmholtz Diabetes Center at Helmholtz Zentrum München
Deutsches Zentrum für Diabetesforschung (DZD))
- Adam M. Zahm
(University of Pennsylvania)
- Jonathan Schug
(University of Pennsylvania)
- Saverio Bellusci
(Universities of Giessen and Marburg Lung Center)
- Rossella Manfredini
(University of Modena and Reggio Emilia)
- Victoria K. Salb
(Helmholtz Diabetes Center at Helmholtz Zentrum München
Deutsches Zentrum für Diabetesforschung (DZD))
- Katharina Gerlach
(University of Erlangen-Nuremberg)
- Benno Weigmann
(University of Erlangen-Nuremberg)
- Anette-Gabriele Ziegler
(Institute of Diabetes Research, Helmholtz Zentrum München, German Research Center for Environmental Health
Technical University Munich, at Klinikum rechts der Isar)
- Klaus H. Kaestner
(University of Pennsylvania)
- Carolin Daniel
(Helmholtz Diabetes Center at Helmholtz Zentrum München
Deutsches Zentrum für Diabetesforschung (DZD)
Ludwig-Maximilians-Universität München)
Abstract
In type 1 diabetes, the appearance of islet autoantibodies indicates the onset of islet autoimmunity, often many years before clinical symptoms arise. While T cells play a major role in the destruction of pancreatic beta cells, molecular underpinnings promoting aberrant T cell activation remain poorly understood. Here, we show that during islet autoimmunity an miR142-3p/Tet2/Foxp3 axis interferes with the efficient induction of regulatory T (Treg) cells, resulting in impaired Treg stability in mouse and human. Specifically, we demonstrate that miR142-3p is induced in islet autoimmunity and that its inhibition enhances Treg induction and stability, leading to reduced islet autoimmunity in non-obese diabetic mice. Using various cellular and molecular approaches we identify Tet2 as a direct target of miR142-3p, thereby linking high miR142-3p levels to epigenetic remodeling in Tregs. These findings offer a mechanistic model where during islet autoimmunity miR142-3p/Tet2-mediated Treg instability contributes to autoimmune activation and progression.
Suggested Citation
Martin G. Scherm & Isabelle Serr & Adam M. Zahm & Jonathan Schug & Saverio Bellusci & Rossella Manfredini & Victoria K. Salb & Katharina Gerlach & Benno Weigmann & Anette-Gabriele Ziegler & Klaus H. K, 2019.
"miRNA142-3p targets Tet2 and impairs Treg differentiation and stability in models of type 1 diabetes,"
Nature Communications, Nature, vol. 10(1), pages 1-15, December.
Handle:
RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-13587-3
DOI: 10.1038/s41467-019-13587-3
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