title: Biological effects of diethylene glycol (DEG) and produced waters (PWs) released from offshore activities: a multi-biomarker approach with the sea bass Dicentrarchus labrax.
abstract: Diethylene glycol (DEG) is largely used during oil and gas exploitation by offshore platforms. The aim of this work was to investigate if this compound induces direct molecular/cellular effects in marine organisms, or indirectly modulate those of produced waters (PWs). Sea bass (Dicentrarchus labrax) were exposed to DEG dosed alone or in combination with PWs from an Adriatic platform. A wide array of analysed biomarkers included cytochrome P450-dependent enzymatic activity, bile metabolites, glutathione S-transferases, acetylcholinesterase, peroxisomal proliferation, antioxidant defences (catalase, glutathione reductase, glutathione peroxidases, glutathione), total oxyradical scavenging capacity, malondialdehyde and DNA integrity (single strand breaks and frequency of micronuclei). Results did not reveal marked effects of DEG, while PWs influenced the biotransformation system, the oxidative status and the onset of genotoxic damages. Co-exposures caused only limited differences of biomarker responses at some experimental conditions, overall suggesting a limited biological impact of DEG at levels normally deriving from offshore activities.
authors.affiliation: Dipartimento di Biochimica, Biologia e Genetica, Università Politecnica delle Marche, Ancona, Italy.
authors.forename: Gorbi
authors.initials: G
authors.lastname: Stefania
authors.forename: Benedetti
authors.initials: B
authors.lastname: Maura
authors.forename: Virno Lamberti
authors.initials: VL
authors.lastname: Claudia
authors.forename: Pisanelli
authors.initials: P
authors.lastname: Barbara
authors.forename: Moltedo
authors.initials: M
authors.lastname: Ginevra
authors.forename: Regoli
authors.initials: R
authors.lastname: Francesco
mesh_terms: D000818:Animals; D001492:Bass / Q000235:genetics / Q000378:metabolism*; D015415:Biomarkers / Q000032:analysis* / Q000378:metabolism; D001711:Biotransformation / Q000187:drug effects; D004249:DNA Damage / Q000187:drug effects; D004784:Environmental Monitoring; D005026:Ethylene Glycols / Q000494:pharmacology*; D029941:Fish Proteins / Q000235:genetics / Q000378:metabolism; D015870:Gene Expression / Q000187:drug effects; D014874:Water Pollutants, Chemical / Q000494:pharmacology*
chemical_list: D015415:Biomarkers; D005026:Ethylene Glycols; D029941:Fish Proteins; D014874:Water Pollutants, Chemical; C013484:diethylene glycol