Volume 60, Issue 3 p. 661-671
Research Article

Zinc supplementation induces regulatory T cells by inhibition of Sirt-1 deacetylase in mixed lymphocyte cultures

Eva Rosenkranz

Eva Rosenkranz

Institute of Immunology, Faculty of Medicine, RWTH Aachen University, University Hospital, Aachen, Germany

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Claudia H.D. Metz

Claudia H.D. Metz

Institute of Immunology, Faculty of Medicine, RWTH Aachen University, University Hospital, Aachen, Germany

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Martina Maywald

Martina Maywald

Institute of Immunology, Faculty of Medicine, RWTH Aachen University, University Hospital, Aachen, Germany

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Ralf-Dieter Hilgers

Ralf-Dieter Hilgers

Institute of Medical Statistics, Faculty of Medicine, RWTH Aachen University, University Hospital, Aachen, Germany

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Inga Weßels

Inga Weßels

Institute of Immunology, Faculty of Medicine, RWTH Aachen University, University Hospital, Aachen, Germany

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Tina Senff

Tina Senff

Institute of Immunology, Faculty of Medicine, RWTH Aachen University, University Hospital, Aachen, Germany

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Hajo Haase

Hajo Haase

Institute of Immunology, Faculty of Medicine, RWTH Aachen University, University Hospital, Aachen, Germany

Department of Food Chemistry and Toxicology, Berlin Institute of Technology, Berlin, Germany

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Maximilian Jäger

Maximilian Jäger

Institute of Immunology, Faculty of Medicine, RWTH Aachen University, University Hospital, Aachen, Germany

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Melanie Ott

Melanie Ott

Gladstone Institute of Virology and Immunology, University of California, San Francisco, CA, USA

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Richard Aspinall

Richard Aspinall

Translational Medicine Group, Cranfield University, Cranfield, Bedfordshire, UK

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Birgit Plümäkers

Birgit Plümäkers

Institute of Immunology, Faculty of Medicine, RWTH Aachen University, University Hospital, Aachen, Germany

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Lothar Rink

Corresponding Author

Lothar Rink

Institute of Immunology, Faculty of Medicine, RWTH Aachen University, University Hospital, Aachen, Germany

Correspondence: Lothar Rink E-mail: [email protected]Search for more papers by this author
First published: 28 November 2015
Citations: 87

Abstract

Scope

Zinc is an essential trace element, regulating immune function. Its deficiency results in immune dysfunction and transplant rejection. In here, a benefit of zinc supplementation for the induction of tolerance was investigated, focusing on the TH1-dominated allogeneic immune reaction.

Methods and results

Allogeneic immune reaction was modeled by mixed lymphocyte culture (MLC). The effect of zinc supplementation was monitored via expression of cytokines and surface lineage markers using ELISA and flow cytometry. Epigenetic analyses were performed to investigate mechanisms underlying zinc-induced changes in regulatory T cell (Treg) activation. Results reveal that Tregs are induced when MLCs are treated with 50 μM zinc causing a decrease in IFNγ production. IL-2 and IL-10 expression were not affected. The teleology of this effect includes the inhibition of histone deacetylase Sirt-1-mediated Foxp3 deacetylation, resulting in its decreased degradation.

Conclusion

In conclusion, zinc should be considered to prevent graft-versus-host disease (GVHD) as it is capable of stabilizing iTregs, resulting in increased numbers of this cell type while not suppressing the immune system.

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