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. 2023 Jan:162:105454.
doi: 10.1016/j.neuint.2022.105454. Epub 2022 Nov 30.

The immediate effect of overnutrition and fluoxetine treatment during the critical period of development on the hippocampus

Severina Cassia de Andrade Silva  1 , Maria Daniele Teixeira de Lemos  2 , Osmar Henrique Santos-Junior  3 , Thyago de Oliveira Rodrigues  3 , Tercya Lucidi Silva  3 , Gabriel A Tavares  4 , Aline Isabel da Silva  5 , Claudia J Lagranha  6
Affiliations

The immediate effect of overnutrition and fluoxetine treatment during the critical period of development on the hippocampus

Severina Cassia de Andrade Silva et al. Neurochem Int. 2023 Jan.

Abstract

It is well known that overnutrition, overweight, and obesity in children can modulate brain mechanisms of plasticity, monoaminergic systems, and mitochondrial function. The immediate effect of overnutrition during the developmental period has not been thoroughly examined in rats until the present. This study sought to evaluate the impact on adult rats of early life overfeeding and fluoxetine treatment from post-natal day 1 (PND1) to post-natal day 21 (PND21) relative to mitochondrial function, oxidative balance, and expression of specific monoaminergic genes in the hippocampus. The following were evaluated: mitochondrial function markers, oxidative stress biomarkers, dopamine-and serotonin-related genes, and BDNF mRNA levels. Overfeeding during the lactation period deregulates cellular metabolism and the monoaminergic systems in the hippocampus. Strikingly, serotonin modulation by fluoxetine treatment protected against some of the effects of early overnutrition. We conclude that overfeeding during brain development induce detrimental effects in mitochondria and in the genes that regulate homeostatic status that can be the molecular mechanisms related to neurological diseases.

Keywords: Fluoxetine; Hippocampus; Mitochondrial function; Overfeeding; Oxidative balance.

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Conflict of interest statement

Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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