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HIGH CONCENTRATIONS OF FRUCTOSE CAUSE BRAIN DAMAGE IN MICE.

Excessive fructose consumption is associated with the incidence of obesity and systemic inflammation, resulting in increased oxidative stress and damage to the function of brain structures. Thus, we hypothesized that fructose consumption will significantly increase inflammation, oxidative damage and mitochondrial dysfunction in the mouse brain and, consequently, memory damage. The effects of different fructose concentrations on inflammatory and biochemical parameters in the mouse brain were evaluated. Male Swiss mice were randomized into four groups: control, with exclusive water intake, 5%, 10% and 20% fructose group. The 10% and 20% fructose groups showed an increase in epididymal fat, in addition to higher food consumption. Inflammatory markers were increased in epididymal fat and in some brain structures. In the evaluation of oxidative stress, it was possible to observe significant increases in the hypothalamus, prefrontal cortex and hippocampus. In the epididymal fat and in the prefrontal cortex, there was a decrease in the activity of the mitochondrial respiratory chain complexes and an increase in the striatum. Furthermore, short memory was impaired in the 10% and 20% groups, but not for long memory. In conclusion, excess fructose consumption can cause fat accumulation, inflammation, oxidative damage and mitochondrial dysfunction, which can damage brain structures and consequently memory.

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