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    ABSTRACT: Eicosapentaenoic acid (EPA), abundant in oily fish, is reported to reduce skin inflammation and provide photoprotection, potential mechanisms include competition with arachidonic acid (AA) for metabolism by cyclooxygenases/lipoxygenases to less pro-inflammatory mediators. We thus examine impact of EPA intake on levels of AA, EPA and their resulting eicosanoids in human skin with or without ultraviolet radiation (UVR) challenge. In a double-blind randomised controlled study, 79 females took 5 g EPA-rich or control lipid for 12 wk. Pre- and post-supplementation, red blood cell and skin polyunsaturated fatty acids were assessed by GC, and eicosanoids from unexposed and UVR-exposed skin by LC-MS/MS. Active supplementation increased red blood cell and dermal EPA versus control (both p < 0.001), lowering relative AA:EPA content (4:1 versus 15:1 and 5:1 versus 11:1, respectively; both p < 0.001). Pre-supplementation, UVR increased PGE2 , 12-hydroxyeicosatetraenoic acids, 12-HEPE (all p < 0.001) and PGE3 (p < 0.05). Post-EPA, PGE2 was reduced in unchallenged skin (p < 0.05) while EPA-derived PGE3 (non-sign) and 12-HEPE (p < 0.01) were elevated post-UVR. Thus, post-EPA, PGE2 :PGE3 was lower in unchallenged (12:1 versus 28:1; p < 0.05) and UVR exposed (12:1 versus 54:1; p < 0.01) skin; 12-hydroxyeicosatetraenoic acids:12-HEPE was lower in UVR-exposed skin (3:1 versus 11:1; p < 0.001). Dietary EPA augments skin EPA:AA content, shifting eicosanoid synthesis towards less pro-inflammatory species, and promoting a regulatory milieu under basal conditions and in response to inflammatory insult.
    No preview · Article · Mar 2014 · Molecular Nutrition & Food Research
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    ABSTRACT: A 49-year-old Caucasian male was referred to the Manchester Psoriasis Service with a 21-year history of severe chronic plaque psoriasis refractory to therapy with topical agents, phototherapy (TL-01), systemic agents (methotrexate, ciclosporin and fumaderm) and the biologic agents adalimumab and ustekinumab, including with concurrent ciclosporin therapy. Relevant history included alcohol excess. There was no family history of demyelination. Following a flare of psoriasis in June 2011, treatment was changed from ustekinumab (90mg dosing regimen) with ciclosporin 2mg/kg/day, to infliximab IV (5mg/kg at week 0, 2, 6, thereafter at 8 week intervals). This article is protected by copyright. All rights reserved.
    Preview · Article · Jan 2014 · British Journal of Dermatology

  • No preview · Article · Dec 2013 · Nature
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