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Eicosapentaenoic acid modulates CyA-induced proinflammatory cytokine over-expression in osteoblastic cells in vitro
Vol 26, Issue 4, 2012
Abstract
Several adverse outcomes are reported in subjects undergoing long term Cyclosporin A (CyA) treatment. Severe osteopenia has been described in clinical and experimental reports, while beneficial effects of n-3 polyunsaturated fatty acids (PUFAs) on bone metabolism are recognized. In the present study we investigated the effects of n-3 versus n-6 PUFAs on osteoblastic cells treated with CyA, evaluating the expression of interleukin (IL)-1ß, interleukin-6 (IL-6), inducible nitric oxide synthase (iNOS), and cyclooxygenase-2 (COX-2) in two different experimental protocols and the production of IL-6, IL-1ß, and tumor necrosis factor alpha (TNFalpha) in cells challenged simultaneously with CyA and eicosapentaenoic acid (EPA) for 48h. IL-1ß and IL-6 up-regulation, induced by CyA, was counteracted by the addition of EPA in both protocols; on the contrary, arachidonic acid (AA) magnified CyA the effects. COX-2 and iNOS levels were not modified by CyA treatment. These in vitro results, that substantiate clinical reports of CyA-induced osteopenia, demonstrate a beneficial effect of EPA on CyA-altered cytokine profile, opening new perspectives in the non-pharmacological management of adverse outcomes in CyA-treated patients.
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Copyright (c) 2012 E. Musacchio, G. Priante, C. Valvason, B. Baggio, L. Sartori
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Medical Genetics, University of Torino Medical School, Italy

Department of Biomedical, Surgical and Dental Sciences, University of Milan, Italy