Abstract
There are conflicts between the effects of free radical over-production induced by exercise on neurotrophins and brain oxidative metabolism. The objective of this study was to investigate the effects of intense physical training on brain-derived neurotrophic factor (BDNF) levels, COX activity, and lipoperoxidation levels in mice brain cortex. Twenty-seven adult male CF1 mice were assigned to three groups: control untrained, intermittent treadmill exercise (3 × 15 min/day) and continuous treadmill exercise (45 min/day). Training significantly (P < 0.05) increased citrate synthase activity when compared to untrained control. Blood lactate levels classified the exercise as high intensity. The intermittent training significantly (P < 0.05) reduced in 6.5% the brain cortex COX activity when compared to the control group. BDNF levels significantly (P < 0.05) decreased in both exercise groups. Besides, continuous and intermittent exercise groups significantly (P < 0.05) increased thiobarbituric acid reactive species levels in the brain cortex. In summary, intense exercise promoted brain mitochondrial dysfunction due to decreased BDNF levels in the frontal cortex of mice.
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Abbreviations
- BDNF:
-
Brain-derived neurotrophic factor
- COX:
-
Cytochrome c oxidase
- CREB:
-
Cyclic AMP response element-binding protein
- CS:
-
Citrate synthase
- ETC:
-
Electron transport chain
- mRNA:
-
Messenger RNA
- mtDNA:
-
Mitochondrial DNA
- NMDA:
-
N-methyl-d-aspartate receptor
- TBARS:
-
Thiobarbituric acid reactive species
- ROS:
-
Reactive oxygen species
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This research was supported by grants from CNPq/MCT (Brazil), CAPES/MEC (Brazil), UNESC (Brazil) and FAPESC (Brazil).
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Aguiar, A.S., Tuon, T., Pinho, C.A. et al. Intense Exercise Induces Mitochondrial Dysfunction in Mice Brain. Neurochem Res 33, 51–58 (2008). https://doi.org/10.1007/s11064-007-9406-x
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DOI: https://doi.org/10.1007/s11064-007-9406-x