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Consumption of a palatable diet rich in simple sugars during development impairs memory of different degrees of emotionality and changes hippocampal plasticity according to the age of the rats
Author(s) -
Altermann Torre Viviane,
Machado Alessandra Gonçalves,
Sá CoutoPereira Natividade,
Mar Arcego Danusa,
Santos Vieira Aline,
Salerno Pamela Silva Vitória,
Santos Garcia Emily,
Lazzaretti Camilla,
Toniazzo Ana Paula,
Nedel Fernanda,
Noschang Cristie,
Schmitz Felipe,
Wyse Angela T. S.,
Dalmaz Carla,
Krolow Rachel
Publication year - 2020
Publication title -
international journal of developmental neuroscience
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.761
H-Index - 88
eISSN - 1873-474X
pISSN - 0736-5748
DOI - 10.1002/jdn.10032
Subject(s) - synaptophysin , hippocampal formation , hippocampus , endocrinology , medicine , environmental enrichment , neuroplasticity , emotionality , synaptic plasticity , psychology , prefrontal cortex , neuroscience , biology , cognition , immunohistochemistry , receptor
We investigated the effect of a chronic palatable diet rich in simple sugars on memory of different degrees of emotionality in male adult rats, and on hippocampal plasticity markers in different stages of development. On postnatal day (PND) 21, 45 male Wistar rats were divided in two groups, according to their diet: (1‐Control) receiving standard lab chow or (2‐Palatable Diet) receiving both standard chow plus palatable diet ad libitum. At PND 60, behavioral tests were performed to investigate memory in distinct tasks. Hippocampal plasticity markers were investigated at PND 28 in half of the animals, and after the behavioral tests. Palatable diet consumption induced an impairment in memory, aversive or not, and increased Na + , K + ‐ATPase activity, both at PND 28, and in the adulthood. Synaptophysin, brain‐derived neurotrophic factor (BDNF), and protein kinase B (AKT), and phosphorylated AKT were reduced in the hippocampus at PND 28. However, at PND 75, this diet consumption led to increased hippocampal levels of synaptophysin, spinophilin/neurabin‐II, and decreased BDNF and neuronal nitric oxide synthase. These results showed a strongly association of simple sugars‐rich diet consumption during the development with memory impairments. Plasticity markers are changed, with results that depend on the stage of development evaluated.