title: Hepatic gene expression profile in brown trout (Salmo trutta) exposed to traffic related contaminants.
abstract: In recent decades there has been growing concern about highway runoff as a potential threat and a significant source of diffuse pollution to the aquatic environment. However, identifying ecotoxicological effects might be challenging, especially at sites where the traffic density is modest to low. Hence, there is a need for alternatives e.g. small-scale toxicity tests using conventional endpoints such as mortality and growth. The present paper presents result from a transcriptional (microarray) screening performed on liver from brown trout (Salmo trutta) acutely exposed (4h) to traffic-related contaminants during washing of a highway tunnel outside the city of Oslo, Norway. The results demonstrated that traffic-related contaminants caused a plethora of molecular changes that persisted several hours after the exposure (i.e. during recovery). Beside an evident transcriptional up-regulation of e.g. cytochrome P450 1A1 (CYP1A1), cytochrome P450 1B1 (CYP1B1), and cytosolic sulfotransferase (SULT) involved in xenobiotic biotransformation, the observed responses were predominantly associated with immunosuppression, oxidative damage, and endocrine modulation. The observed responses were likely caused by an interaction of several contaminants including trace metals and organic micro-pollutants such as PAHs.
authors.affiliation: Norwegian University of Life Sciences (UMB), Department of Plant and Environmental Sciences, P.O. Box 5003, N-1432 Ås, Norway. sonmel@vegvesen.no
authors.forename: Sondre
authors.initials: S
authors.lastname: Meland
authors.forename: Eivind
authors.initials: E
authors.lastname: Farmen
authors.forename: Lene S
authors.initials: LS
authors.lastname: Heier
authors.forename: Bjørn Olav
authors.initials: BO
authors.lastname: Rosseland
authors.forename: Brit
authors.initials: B
authors.lastname: Salbu
authors.forename: You
authors.initials: Y
authors.lastname: Song
authors.forename: Knut Erik
authors.initials: KE
authors.lastname: Tollefsen
mesh_terms: D000818:Animals; D019363:Cytochrome P-450 CYP1A1 / Q000235:genetics / Q000378:metabolism; D003600:Cytosol / Q000378:metabolism; D005618:Fresh Water / Q000737:chemistry; D015870:Gene Expression / Q000187:drug effects*; D020869:Gene Expression Profiling; D008099:Liver / Q000378:metabolism*; D008670:Metals / Q000032:analysis / Q000633:toxicity; D018384:Oxidative Stress; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis / Q000633:toxicity; D015238:Sulfotransferases / Q000235:genetics / Q000378:metabolism; D014337:Trout / Q000235:genetics* / Q000378:metabolism; D001335:Vehicle Emissions / Q000032:analysis / Q000633:toxicity*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000633:toxicity*
chemical_list: D008670:Metals; D011084:Polycyclic Aromatic Hydrocarbons; D001335:Vehicle Emissions; D014874:Water Pollutants, Chemical; D019363:Cytochrome P-450 CYP1A1; D015238:Sulfotransferases