Consumo em excesso de sacarose na forma de açúcar cristal ou açúcar mascavo: Avaliação do estresse oxidativo em Drosophila melanogaster

Abstract

The fruit fly, Drosophila melanogaster (DM), has been considered a suitable model organism to study metabolic, development, as well as human health dysfunctions. In this work, adult Drosophila melanogaster was used to evaluate markers of oxidative stress against a diet enriched with sucrose in the form of crystal sugar or brown sugar. Experiments were performed on adult larvae flies (1-5 days) after a light / dark 15-day cycle. The larvae were treated or not with sucrose-rich diets using brown sugar or crystal sugar for each concentration: 5, 10, 20, 30 and 40%. The newly hatched larvae were used for the analysis of oxidative stress, biochemical parameter and iron dosage in the treatment with brown sugar. The treatment of the two diets in high concentrations of brown sugar or crystal sugar increased SOD activity as crystal sugar concentration increased, in greater prominence, compared to control in males and females. There was a decrease in catalase activity with increased brown sugar concentration for both genders. Ingestion of this diet caused an increase in the results of oxidative stress markers (TBARS and Protein Carbonylation) in male and female DM for both sugars. In general, through these results, we highlight that Drosophila melanogaster is an effective model for investigating conditions related to metabolic disorders linked to excessive consumption of sucrose.