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Energy metabolism and behavioral parameters in female mice subjected to obesity and offspring deprivation stress

2023; Elsevier BV; Volume: 451; Linguagem: Inglês

10.1016/j.bbr.2023.114526

1872-7549

Kenia L.O. Cruz, Daniéle Hendler Salla, Mariana Pacheco de Oliveira, Larissa Espindola da Silva, Larissa Marques Dela Vedova, Talita Farias Mendes, Catarina Barbosa Chaves Bressan, Mariella Reinol da Silva, Sheila M.L. Santos, Hevylin Jacinto Soares, Rayane Luiz Mendes, Camila Nandi Vernke, Marina Goulart da Silva, Ana Olívia Martins Laurentino, Fabiana Durante de Medeiros, Thais Ceresér Vilela, Isabela da Silva Lemos, Rafael Mariano de Bitencourt, Gislaine Z. Réus, Emílio L. Streck, Aline Haas de Mello, Gislaine Tezza Rezin,

Tryptophan and brain disorders

This study aimed to evaluate the behavioral and energy metabolism parameters in female mice subjected to obesity and offspring deprivation (OD) stress. Eighty female Swiss mice, 40 days old, were weighed and divided into two groups: Control group (control diet, n = 40) and Obese group (high-fat diet, n = 40), for induction of the animal model of obesity, the protocol was based on the consumption of a high-fat diet and lasted 8 weeks. Subsequently, the females were subjected to pregnancy, after the birth of the offspring, were divided again into the following groups (n = 20): Control non-deprived (ND), Control + OD, Obese ND, and Obese + OD, for induction of the stress protocol by OD. After the offspring were 21 days old, weaning was performed and the dams were subjected to behavioral tests. The animals were humanely sacrificed, the brain was removed, and brain structures were isolated to assess energy metabolism. Both obesity and OD led to anhedonia in the dams. It was shown that the structures most affected by obesity and OD are the hypothalamus and hippocampus, as evidenced by the mitochondrial dysfunction found in these structures. When analyzing the groups separately, it was observed that OD led to more pronounced mitochondrial damage; however, the association of obesity with OD, as well as obesity alone, also generated damage. Thus, it is concluded that obesity and OD lead to anhedonia in animals and to mitochondrial dysfunction in the hypothalamus and hippocampus, which may lead to losses in feeding control and cognition of the dams.