Effect of cadmium exposure on essential omega-3 fatty acids in the edible bivalve Donax trunculus.
Fiche publication
Date publication
juillet 2018
Journal
Environmental science and pollution research international
Auteurs
Membres identifiés du Cancéropôle Est :
Pr KAHN Naim, Dr HICHAMI Aziz
Tous les auteurs :
Merad I, Bellenger S, Hichami A, Khan NA, Soltani N
Lien Pubmed
Résumé
Donax trunculus is the most consumed bivalve by the local population of the Northeast Algeria for its nutritional value. Therefore, the aim of the current study was to determine the effects of cadmium (Cd), a known toxic metal, on the alterations in main essential omega-3 fatty acids, i.e., eicosapentaenoic acid (EPA; C20:5n-3) and docosahexaenoic acid (DHA; C22:6n-3), in male and female gonads of D. trunculus during the reproduction period at spring (before spawning). Additionally, this work seeks to describe the relation between EPA and DHA with non-methylene-interrupted dienoic (NMID) fatty acids, and explores their possible contribution of to protect against Cd stress. The samples were collected at El Battah, a relatively clean sea shore, and reared in the laboratory. Physico-chemical parameters such as temperature, pH, salinity, and dissolved oxygen were measured. Cd was added to the rearing water at two sublethal concentrations (LC and LC-96h, as determined previously). A two-way ANOVA analysis indicated significant effects of concentrations and genders for both fatty acids. Our results showed a significant reduction in EPA and DHA concentrations in the both genders, with a strong effect in females. There was also a negative correlation between NMID fatty acids and the two essential omega-3 fatty acids for each gender.
Mots clés
Cadmium, DHA, Donax trunculus, EPA, Omega-3 fatty acids
Référence
Environ Sci Pollut Res Int. 2018 Jul;25(19):18242-18250