Abstract
Zinc has been reported to play a key role in lipid metabolism as well as in defences against oxidative stress. The aim of this work was to investigate the fatty acid distribution (plasma, heart, kidney, liver) and peroxidation (plasma) in zinc-deficient rats fed with n-6 fatty acids (10% corn oil) or n3 fatty acid fish oil (10% Maxepa). Zinc deficiency led to a decreased tissular and plasma n-6/n-3 ratio both in triglycerides and phospholipids. This effect was more marked in the Maxepa group than in the corn oil group. In plasma, the TBARs/TG + PL ratio was significantly enhanced in zinc-deficient animals, especially in rats receiving Maxepa. With regard to these results, zinc deficiency could appear as an aggravating factor of oxidative risk when associated with a n-3 fatty acid-rich diet. This work draws attention to the harmful oxidative risk associated with patients' intake of fish oil concentrate, without taking into account their antioxidant dietary intakes and status.
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