Abstract |
The administration of iron induces liver oxidative stress and depletion of long-chain polyunsaturated fatty acids (LCPUFAs), n-6/n-3 LCPUFA ratio enhancement and fat accumulation, which may be prevented by antioxidant-rich extra virgin olive oil (AR-EVOO) supplementation. Male Wistar rats were subjected to a control diet (50 mg iron/kg diet) or iron-rich diet (IRD; 200 mg/kg diet) with alternate AR-EVOO for 21 days. Liver fatty acid (FA) analysis was performed by gas-liquid chromatography (GLC) after lipid extraction and fractionation, besides Δ-5 desaturase (Δ-5 D) and Δ6-D mRNA expression (qPCR) and activity (GLC) measurements. The IRD significantly (p < 0.05) increased hepatic total fat, triacylglycerols, free FA contents and serum transaminases levels, with diminution in those of n-6 and n-3 LCPUFAs, higher n-6/n-3 ratios, lower unsaturation index and Δ5-D and Δ6-D activities, whereas the mRNA expression of both desaturases was enhanced over control values, changes that were prevented by concomitant AR-EVOO supplementation. N-6 and n-3 LCPUFAs were also decreased by IRD in extrahepatic tissues and normalized by AR-EVOO. In conclusion, AR-EVOO supplementation prevents IRD-induced changes in parameters related to liver FA metabolism and steatosis, an effect that may have a significant impact in the treatment of iron-related pathologies or metabolic disorders such as non-alcoholic fatty liver disease.
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Authors | Cynthia Barrera, Rodrigo Valenzuela, Miguel A Rincón, Alejandra Espinosa, Sandra López-Arana, Daniel González-Mañan, Nalda Romero, Romina Vargas, Luis A Videla |
Journal | Prostaglandins, leukotrienes, and essential fatty acids
(Prostaglandins Leukot Essent Fatty Acids)
Vol. 153
Pg. 102058
(02 2020)
ISSN: 1532-2823 [Electronic] Scotland |
PMID | 32007744
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | Copyright © 2020 Elsevier Ltd. All rights reserved. |
Chemical References |
- Antioxidants
- Delta-5 Fatty Acid Desaturase
- Fatty Acids
- Olive Oil
- Iron
- Fatty Acid Desaturases
- Linoleoyl-CoA Desaturase
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Topics |
- Animals
- Antioxidants
(administration & dosage, chemistry, pharmacology)
- Chromatography, Gas
- Delta-5 Fatty Acid Desaturase
- Disease Models, Animal
- Fatty Acid Desaturases
(genetics)
- Fatty Acids
(analysis)
- Fatty Liver
(chemically induced, epidemiology, prevention & control)
- Gene Expression Regulation, Enzymologic
(drug effects)
- Iron
(adverse effects)
- Linoleoyl-CoA Desaturase
(genetics)
- Male
- Olive Oil
(administration & dosage, chemistry, pharmacology)
- Rats
- Rats, Wistar
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