Time-course evaluation of ROS-mediated toxicity in mussels, Mytilus galloprovincialis, during a field translocation experiment.
Harbours can be considered as model environments for developing and validating field monitoring procedures and to investigate mechanistic relationships between different biological responses. In this study several biomarkers were investigated in marine mussels caged for 4 weeks (June-July 2001) into an industrialized harbour of NW Italy. Organisms were collected at different time-intervals to better characterize the sensitivity, temporal variations and interactions of analysed responses. Besides single antioxidants the total oxyradical scavenging capacity (TOSC) assay was used to analyse the capability of the whole antioxidant system to neutralize specific forms of radicals: these data were further integrated by measurement of DNA integrity, oxidized bases and the impairment of lysosomal membrane stability in haemocytes. Results showed a biphasic trend for single antioxidants and TOSC, with an increase during the first 2 weeks of exposure to the polluted site followed by a progressive decrease up to a severe depletion in the final part of the experiment.
Frenzilli
Giada
G
Dipartimento di Morfologia Umana e Biologia Applicata, Università di Pisa, Italy.
Bocchetti
Raffaella
R
Pagliarecci
Massimiliano
M
Nigro
Marco
M
Annarumma
Francesca
F
Scarcelli
Vittoria
V
Fattorini
Daniele
D
Regoli
Francesco
F
D000704:Analysis of Variance; D000818:Animals; D000975:Antioxidants / Q000032:analysis; D015415:Biomarkers; D049872:Bivalvia / Q000187:drug effects* / Q000378:metabolism*; D002374:Catalase / Q000378:metabolism; D002849:Chromatography, Gas; D020552:Comet Assay; D004249:DNA Damage / Q000187:drug effects; D004781:Environmental Exposure; D004784:Environmental Monitoring; D016166:Free Radical Scavengers / Q000378:metabolism; D005982:Glutathione Transferase / Q000378:metabolism; D006434:Hemocytes / Q000166:cytology / Q000187:drug effects; D007558:Italy; D008099:Liver / Q000378:metabolism; D008247:Lysosomes / Q000187:drug effects / Q000473:pathology; D019216:Metals, Heavy / Q000032:analysis / Q000633:toxicity; D009499:Neutral Red; D017382:Reactive Oxygen Species / Q000378:metabolism*; D012623:Seawater; D013053:Spectrophotometry; D013054:Spectrophotometry, Atomic; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000633:toxicity*
D000975:Antioxidants; D015415:Biomarkers; D016166:Free Radical Scavengers; D019216:Metals, Heavy; D017382:Reactive Oxygen Species; D014874:Water Pollutants, Chemical; D009499:Neutral Red; D002374:Catalase; D005982:Glutathione Transferase