High‐Fat and High‐Sucrose Diets Impair Time‐of‐Day Differences in Spatial Working Memory of Male Mice
Year: 2020
Type: article
Abstract: OBJECTIVE: This study aimed to investigate both the long-term and short-term impacts of high-fat diets (HFD) or high-sucrose diets (HSD) on the normal diurnal pattern of cognitive function, protein expression, and the molecular clock in mice. METHODS: This study used both 6-month and 4-week feeding strategies by providing male C57BL/6J mice access to either a standard chow, HFD, or HSD. Spatial working memory and synaptic plasticity were assessed both day and night, and hippocampal tissue was measured for changes in NMDA and AMPA receptor subunits (GluN2B, GluA1), as well as molecular clock gene expression. RESULTS: HFD and HSD both disrupted normal day/night fluctuations in spatial working memory and synaptic plasticity. Mice fed HFD altered their food intake to consume more calories during the day. Both diets disrupted normal hippocampal clock gene expression, and HFD reduced GluN2B levels in hippocampal tissue. CONCLUSIONS: Taken together, these results suggest that both HFD and HSD induce a loss of day/night performance in spatial working memory and synaptic plasticity as well as trigger a cascade of changes that include disruption to the hippocampal molecular clock.
Source: Obesity
DOI: 10.1002/oby.22983
Institutions: University of Alabama at Birmingham, UAB Medicine
Language: English
Subfield: Endocrine and Autonomic Systems
Field: Neuroscience
Domain: Life Sciences
Open Access status: green
Awards: G301048564, Glucagon Mediated Potentiation of Insulin Sensitivity in Glucose Metabolism, Circadian dysfunction and neurodegenerative disease, The Nigral Molecular Clock and Vulnerability to Neurodegeneration, Michigan Diabetes Research Center (MDRC), UAB Nutrition Obesity Research Center (NORC), UAB Diabetes Research Center, UAB Pre-Doctoral Training Program in Obesity-Related Research
OpenAlex ID: W3092199795