Journal
JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY
Volume 125, Issue 1, Pages 60-68Publisher
MOSBY-ELSEVIER
DOI: 10.1016/j.jaci.2009.11.020
Keywords
Natural killer cells; skin; allergy; autoimmunity
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Funding
- Ministry of Culture, Higher Education, and Research (MCESR), Luxembourg
- National Research Fund (FNR), Luxembourg
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Natural killer (NK) cells are best known for their ability to recognize and kill tumor cells and virally infected cells and for their ability to produce large amounts of some cytokines, such as IEFN-gamma. Recent research has substantially expanded our view on the function of NK cells in the immune system in health and disease. In addition to the better-studied functions in cancer and autoimmunity, contributions from NK cells to allergies and various skin diseases have emerged. We briefly recount the traditional NK cell functions before focusing on their roles in atopic dermatitis, psoriasis, alopecia areata, and pemphigus vulgaris. Although this field is still developing, strong data are available that indicate NK cell involvement. In patients with allergic diseases, the production of T(H)2 cytokines by NK cells contributes to the known immune deviation. In patients with psoriasis, their pathophysiologic role seems to be especially the production of IFN-gamma. NK cell overactivation can be found in patients with alopecia areata and pemphigus vulgaris. Many details are still unclear; however, we believe that there is solid evidence that NK cells actively participate in a number of diseases that have not been traditionally linked to this type of lymphocyte. (J Allergy Clin Immunol 2010;125:60-8.)
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