title: Resveratrol modulates innate and inflammatory responses in fish leucocytes.
abstract: Resveratrol (RESV; trans-3,5,4'-trihydroxystilbene), a phytoalexin that is produced by some plants, among other effects has well-known antioxidant, anti-inflammatory and immunomodulatory activities in mammals. In the present study, the effects of RESV on several functions of turbot, Psetta maxima (L.), kidney leucocytes (KLs) related to the innate and inflammatory responses were investigated. RESV exerted a dose-dependent inhibitory effect on the migratory response and on the production of reactive oxygen species in KL, after stimulation of the respiratory burst activity with phorbol myristate acetate (PMA). RESV also significantly inhibited the generation of the pro-inflammatory mediator prostaglandin E(2) (PGE(2)) in the supernatant of KL cultures stimulated with acidic sulphated polysaccharides (ASPs) from the seaweed Ulva rigida. The effects of the polyphenol on enzymatic activity and on myeloperoxidase (MPO) gene expression in neutrophils were also tested. It was found that RESV strongly inhibited intracellular and extracellular MPO activity, behaving as a noncompetitive and reversible inhibitor, and also induced a decrease in MPO mRNA levels in turbot neutrophils. These findings indicate that RESV exerts important modulatory effects on inflammatory responses in fish, and considering the importance of innate immunity in these vertebrates and the similarities with mammals, it may be possible to use fish for analysis of the effects of different substances on inflammatory responses.
authors.affiliation: Departamento de Biología Celular y Ecología, Facultad de Biología, Universidad de Santiago de Compostela, 15782 Santiago de Compostela, Spain.
authors.forename: R
authors.initials: R
authors.lastname: Castro
authors.forename: J
authors.initials: J
authors.lastname: Lamas
authors.forename: P
authors.initials: P
authors.lastname: Morais
authors.forename: M L
authors.initials: ML
authors.lastname: Sanmartín
authors.forename: F
authors.initials: F
authors.lastname: Orallo
authors.forename: J
authors.initials: J
authors.lastname: Leiro
mesh_terms: D000818:Animals; D002465:Cell Movement / Q000187:drug effects; D002478:Cells, Cultured; D015232:Dinoprostone / Q000378:metabolism; D005412:Flatfishes; D005786:Gene Expression Regulation; D007113:Immunity, Innate / Q000187:drug effects*; D007249:Inflammation / Q000378:metabolism*; D007668:Kidney / Q000166:cytology; D007962:Leukocytes / Q000187:drug effects* / Q000276:immunology / Q000378:metabolism; D009195:Peroxidase / Q000235:genetics / Q000378:metabolism; D016897:Respiratory Burst / Q000187:drug effects; D000077185:Resveratrol; D013267:Stilbenes / Q000494:pharmacology*; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology
chemical_list: D013267:Stilbenes; D009195:Peroxidase; D015232:Dinoprostone; D013755:Tetradecanoylphorbol Acetate; D000077185:Resveratrol