Avène spring water (ASW) is commonly used in France for treating atopic dermatitis and psoriasis. Previous works demonstrated modulation of cell membrane fluidity by ASW. The aims of the present study were (a) to investigate a possible in vitro effect of ASW on Th1- and Th2-dependent cytokine production using peripheral blood mononuclear cells from healthy individuals and (b) to investigate both the in vitro effect of ASW on AD patients’ cells and the in vivo cellular and clinical modifications induced by a 3-week Avène Medical Spa water cure (AMSWC). The effect of ASW was tested on lymphocyte cultures, which were stimulated in vitro by various mitogens and a superantigen of staphylococcal origin. The lymphocyte proliferation and the production of the cytokines IL-2, IL-4 and IFN-γ were tested. The results showed that ASW-containing medium enhanced the lymphoproliferative response to some mitogens. IL-2 and IFN-γ production were also increased in stimulated culture supernatants. Conversely, ASW-containing medium induced a decrease in IL-4 production by normal peripheral blood lymphocytes. Furthermore, AMSWC was able to amend the clinical features as well as the immunological Th2 profile of atopic dermatitis.
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