title: Antioxidant efficiency and detoxification enzymes in spotted dogfish Scyliorhinus canicula.
abstract: Although elasmobranchs are widely distributed species, commonly found on sandy, gravely or muddy bottoms, several biological aspects of their metabolism still remain poorly investigated. In this work the efficiency of antioxidant system and detoxification enzymes were investigated in the coastal spotted dogfish Scyliorhinus canicula and in the red mullet Mullus barbatus for comparison with a teleost species. Organisms were sampled during a bottom trawl survey and analyzed for the biotransformation activity (EROD), levels of metallothioneins, catalase, glutathione S-transferases and total oxyradical scavenging capacity (TOSC) toward peroxyl radicals and hydroxyl radicals. EROD activity in the elasmobranchs was more than one order of magnitude lower than in the red mullets, while similar levels of metallothioneins were measured in these species. S. canicula showed significantly lower antioxidant enzymes and a more reduced efficiency in neutralizing *OH; on the other hand the scavenging capability toward ROO* was comparable in S. canicula and M. barbatus.
authors.affiliation: Istituto di Biologia e Genetica, Università Politecnica delle Marche, Via Ranieri Monte D'Ago, 60100 Ancona, Italy.
authors.forename: Stefania
authors.initials: S
authors.lastname: Gorbi
authors.forename: David
authors.initials: D
authors.lastname: Pellegrini
authors.forename: Sara
authors.initials: S
authors.lastname: Tedesco
authors.forename: Francesco
authors.initials: F
authors.lastname: Regoli
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000378:metabolism*; D015415:Biomarkers / Q000032:analysis; D002374:Catalase / Q000378:metabolism; D019363:Cytochrome P-450 CYP1A1 / Q000378:metabolism; D004284:Dogfish / Q000378:metabolism* / Q000502:physiology; D016166:Free Radical Scavengers / Q000378:metabolism; D005982:Glutathione Transferase / Q000378:metabolism; D008658:Inactivation, Metabolic / Q000502:physiology; D008522:Mediterranean Sea; D008668:Metallothionein / Q000378:metabolism; D010473:Perciformes / Q000378:metabolism* / Q000502:physiology; D013053:Spectrophotometry
chemical_list: D000975:Antioxidants; D015415:Biomarkers; D016166:Free Radical Scavengers; D008668:Metallothionein; D002374:Catalase; D019363:Cytochrome P-450 CYP1A1; D005982:Glutathione Transferase