1. Highly aggressive behavior induced by social stress is associated to reduced cytochrome c oxidase activity in mice brain cortex
- Author
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Marcus F. Oliveira, Gabriel Melo de Oliveira, Ana Paula Miranda Mendonça, Viviane Muniz da Silva Fragoso, T. C. Araujo-Jorge, A. Gaviraghi, Renata Machado Felippe, and Luanda Yanaan Hoppe
- Subjects
Male ,0301 basic medicine ,medicine.medical_specialty ,Bioenergetics ,Cell Respiration ,Central nervous system ,Mitochondrion ,Electron Transport Complex IV ,Mice ,03 medical and health sciences ,Cellular and Molecular Neuroscience ,0302 clinical medicine ,Internal medicine ,medicine ,Animals ,Cytochrome c oxidase ,Social Behavior ,Prefrontal cortex ,Cerebral Cortex ,Social stress ,biology ,Adenine nucleotide translocator ,Cytochrome c ,Cell Biology ,Aggression ,Enzyme Activation ,030104 developmental biology ,Endocrinology ,medicine.anatomical_structure ,biology.protein ,Stress, Psychological ,030217 neurology & neurosurgery - Abstract
Violence and aggression represent severe social problems, with profound impacts on public health. Despite the development of experimental models to study aggressive behavior is highly appreciated, the underlying mechanisms remain poorly understood. Given the key contribution of mitochondria to central nervous system bioenergetics, we hypothesized that mitochondrial function in brain would be altered by social stress. Using a model of spontaneous aggression, we investigated here the effects of social stress on brain mitochondrial function in prefrontal cortex of Swiss mice. Animals were categorized as highly aggressive, subordinate and non-aggressive (harmonic) after stress induced by regrouping and compared them with non-regrouped animals. Despite social stress did not affect brain cortex oxygen consumption rates and NADH:cytochrome c oxidoreductase activity, cytochrome c oxidase expression and activity were significantly lower in highly aggressive animals compared to non-regrouped ones. These changes were not observed in ATP synthase and adenine nucleotide translocator content suggesting a selective effect of social stress on cytochrome c oxidase. Therefore, aggressive behavior generated upon social stress associates to selective reduction in cytochrome c oxidase activity, with potential detrimental effects on brain bioenergetics and function.
- Published
- 2019