Borgland, StephanieMackie, Yasmine Olga2016-07-082016-07-0820162016Mackie, Y. O. (2016). The Effects of High Sucrose or High Fat Diet on Brain Macrostructure, Cognition, and Expression of Phosphorylated Tau (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/28107http://hdl.handle.net/11023/3113Consumption of sucrose-rich and fat-rich foods poses an in increased risk of obesity, and has been shown to be associated with cognitive decline, reduced cortical volume, and dementia. The goal of this thesis was to determine the effect of diet on metabolic measures, gut microbiota, brain macrostructure, cognitive function, and dementia biomarker expression in middle-aged female mice. In Chapter 2, high sucrose diet exposure did not alter metabolism, but increased liver triglyceride concentration and altered gut microbiota relative abundance. We also show that sucrose fed mice experienced a significant decrease in the volume of the parietal temporal cortex, and a deficit in cognitive flexibility. In Chapter 3, high fat diet exposure induced significant differences in weight, glucose sensitivity and plasma leptin levels, without altering the expressions of phosphorylated tau. Together, these studies demonstrate that diet, without affecting metabolic measures, can alter cortical volume and cognitive function.engUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.Neurosciencemaster thesis10.11575/PRISM/28107