Transcriptional responses of cancer-related genes in turbot Scophthalmus maximus and mussels Mytilus edulis exposed to heavy fuel oil no. 6 and styrene.
Recent spills in European waters have released polycyclic aromatic hydrocarbons, important components of heavy fuel oil, and the hydrocarbon styrene. Heavy fuel oil and styrene are classified as potentially genotoxic and carcinogenic. Here we investigate transcription of genes involved in cancer development in the liver of juvenile turbots and in the digestive gland of mussels exposed to heavy fuel oil and to styrene and after a recovery period. In turbot, oil produced a significant up-regulation of p53 and gadd45α after 14 days exposure. cyclin G1 was up-regulated after 7 days treatment with styrene. In mussels, ras was down-regulated in both treatments after the recovery periods. No mutations in ras hotspots were detected in exposed mussels. gadd45α was up-regulated after the recovery period of the styrene experiment. Overall, transcriptional responses differed in mussels compared to turbot. Turbot responded to hydrocarbon exposure by triggering cell cycle arrest (p53) and DNA repair (gadd45α).
Laboratory of Cell Biology and Histology, Faculty of Science and Technology, University of the Basque Country UPV/EHU, Sarriena z/g, E-48940 Leioa, Basque Country, Spain.
Pamela
P
Ruiz
Amaia
A
Orbea
Jeanette M
JM
Rotchell
Miren P
MP
Cajaraville
D000818:Animals; D005412:Flatfishes / Q000502:physiology*; D005648:Fuel Oils / Q000633:toxicity*; D041981:Gastrointestinal Tract / Q000187:drug effects / Q000473:pathology; D015972:Gene Expression Regulation, Neoplastic / Q000187:drug effects*; D047908:Intracellular Signaling Peptides and Proteins; D008099:Liver / Q000187:drug effects / Q000473:pathology; D049880:Mytilus edulis / Q000502:physiology*; D009363:Neoplasm Proteins / Q000235:genetics*; D013045:Species Specificity; D020058:Styrene / Q000633:toxicity*; D016159:Tumor Suppressor Protein p53 / Q000235:genetics; D014874:Water Pollutants, Chemical / Q000633:toxicity*; D018631:ras Proteins / Q000235:genetics; D000097642:GADD45 Proteins
D005648:Fuel Oils; D047908:Intracellular Signaling Peptides and Proteins; D009363:Neoplasm Proteins; D020058:Styrene; D016159:Tumor Suppressor Protein p53; D014874:Water Pollutants, Chemical; D018631:ras Proteins; D000097642:GADD45 Proteins