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Oxidative Medicine and Cellular Longevity
Volume 2016, Article ID 4018157, 12 pages
Research Article

High-Fat Diet Induces Oxidative Stress and MPK2 and HSP83 Gene Expression in Drosophila melanogaster

1Laboratório de Avaliações Farmacológicas e Toxicológicas Aplicadas às Moléculas Bioativas, Universidade Federal do Pampa (Unipampa), Campus Itaqui, 97650-000 Itaqui, RS, Brazil
2Programa de Pós Graduação em Ciências Biológicas: Bioquímica Toxicológica, Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
3Centro Interdisciplinar de Pesquisa em Biotecnologia (CIP/BIOTEC), Universidade Federal do Pampa, Campus São Gabriel, 97300 000 São Gabriel, RS, Brazil

Received 14 May 2016; Revised 26 June 2016; Accepted 30 June 2016

Academic Editor: Silvana Hrelia

Copyright © 2016 Mariane Trindade de Paula et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The consumption of a high-fat diet (HFD) causes alteration in normal metabolism affecting lifespan of flies; however molecular mechanism associated with this damage in flies is not well known. This study evaluates the effects of ingestion of a diet supplemented with 10% and 20% of coconut oil, which is rich in saturated fatty acids, on oxidative stress and cells stress signaling pathways. After exposure to the diet for seven days, cellular and mitochondrial viability, lipid peroxidation and antioxidant enzymes SOD and CAT activity, and mRNA expression of antioxidant enzymes HSP83 and MPK2 were analyzed. To confirm the damage effect of diet on flies, survival and lifespan were investigated. The results revealed that the HFD augmented the rate of lipid peroxidation and SOD and CAT activity and induced a higher expression of HSP83 and MPK2 mRNA. In parallel, levels of enzymes involved in lipid metabolism (ACSL1 and ACeCS1) were increased. Our data demonstrate that association among metabolic changes, oxidative stress, and protein signalization might be involved in shortening the lifespan of flies fed with a HFD.