European Journal of Nutrition

, Volume 56, Issue 2, pp 557–567 | Cite as

Zinc enhances the number of regulatory T cells in allergen-stimulated cells from atopic subjects

  • Eva Rosenkranz
  • Ralf-Dieter Hilgers
  • Peter Uciechowski
  • Arnd Petersen
  • Birgit Plümäkers
  • Lothar Rink
Original Contribution



The trace element zinc is essential for immune function and its regulation. Since zinc deficiency and allergic hyperresponsive reactions are often accompanied, the influence of zinc on allergen-induced cell growth, CD4+ regulatory T (Treg) cell numbers and cytokine expression during allergic immune reactions was investigated.


Peripheral blood mononuclear cells (PBMCs) from non-atopic and atopic subjects were treated with timothy grass allergen pre-incubated with or without zinc. Proliferation was determined by analyzing the incorporation of 3H-thymidine. Intracellular zinc and Foxp3 levels and cell surface antigens were measured by FACS, cytokine expression by ELISA and real-time PCR.


Incubation with 50 μM zinc sulfate (Zn50) enhances cytosolic zinc concentrations in CD3+ T cells. The data also reveal that the combination of Zn50 plus allergen significantly reduces PBMC proliferation of atopic subjects. Additionally, Zn50 plus allergen enhances Th1 cytokine responses shown by increased interferon (IFN)-γ/interleukin (IL)-10 ratios as well as enhanced tumor necrosis factor-α release. In response to allergen, zinc increases Treg cells and upregulates the mRNA expression of cytotoxic T-lymphocyte antigen-4 in atopic subjects. Interestingly, Zn50 alone leads to an increase of CD4+CD25high(hi)+ cells in atopic and non-atopic subjects.


Zinc may regulate unwanted hyperresponsive immune reactions by suppressing proliferation through a significant shift from IL-10 to the Th1 cytokine IFN-γ, and enhanced regulatory T cell numbers. Therefore, zinc supplementation may be a promising tool for the therapy of allergies, without negatively affecting the immune system.


Zinc Nutritional immunology Allergy Regulatory T cells Treg Foxp3 



We acknowledge grant support SFB/TR22 A03 and Z01 from the Deutsche Forschungsgemeinschaft for A.P. L.R. is a member of the European COST action Zinc-Net (TDI304).

Compliance with ethical standards

The study was approved by the local ethical committee (No. AZ 016/09) and had therefore been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. All persons gave their informed consent prior to their inclusion in the study.

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Eva Rosenkranz
    • 1
  • Ralf-Dieter Hilgers
    • 2
  • Peter Uciechowski
    • 1
  • Arnd Petersen
    • 3
  • Birgit Plümäkers
    • 1
  • Lothar Rink
    • 1
  1. 1.Institute of Immunology, Faculty of MedicineUniversity Hospital, RWTH Aachen UniversityAachenGermany
  2. 2.Institute of Medical Statistics, Faculty of MedicineRWTH Aachen UniversityAachenGermany
  3. 3.Division of Clinical and Molecular Allergology, Research Center BorstelAirway Research Center North (ARCN)BorstelGermany

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