Oxidative stress response of scallop Aequipecten tehuelchus from Patagonia Argentina exposed to inorganic arsenic  

STURLA LOMPRÉ, JULIETA ; GIARRATANO, ERICA ; GIL, MÓNICA NOEMI; BERTRAND, LIDWINA; MALANGA, GABRIELA

Regional Studies in Marine Science

Elsevier

Año: 2023

2352-4855

aboratory studies were performed to assess the impact of acute arsenic exposure onthe Tehuelche scallop Aequipecten tehuelchus from San José gulf (Patagonia,Argentina). The arsenic accumulation in gills, digestive gland and muscle of A.tehuelchus was analyzed after 96 hours of exposure at different concentrations (0, 4,5, 6.3 and 7.9 mg As/L). Accumulation in all tissues increased linearly with theexposure concentration, evidencing no arsenic saturation. A 96 hour median lethalconcentration (LC50) value of 7.1 mg As/L was determined, characterizing this speciesas relatively tolerant to arsenic. The potential effects of arsenic were studied throughthe production of reactive species, enzymatic activities of catalase and glutathione-Stransferase, metallothioneins, lipid peroxidation, and lipid-soluble antioxidants. Inpresence of arsenic, the 2´,7´-dichlorodihydrofluorescein diacetate oxidation rate andthiobarbituric acid reactive substances content did not show changes in any tissues.Cat