Biology of Sex Differences | |
Sex differences in the effects of high fat diet on underlying neuropathology in a mouse model of VCID | |
Research | |
Gabrielle Fredman1  Ashley M. Kopec2  Richard D. Kelly2  David Riccio2  Kristen L. Zuloaga2  Abigail E. Salinero2  Sophie Belin2  David Kordit2  Olivia J. Gannon2  Charly Abi-Ghanem2  Nyi-Rein Kyaw2  Yannick Poitelon2  Febronia M. Mansour2  Harini Venkataganesh2  Lisa S. Robison3  | |
[1] Department Molecular and Cellular Physiology, Albany Medical College, 47 New Scotland Avenue, MC-136, 12208, Albany, NY, USA;Department of Neuroscience & Experimental Therapeutics, Albany Medical College, 47 New Scotland Avenue, MC-136, 12208, Albany, NY, USA;Department of Psychology & Neuroscience, Nova Southeastern University, 3301 College Avenue, 33314, Fort Lauderdale, FL, USA; | |
关键词: Diet-induced obesity; High fat diet; Prediabetes; Sex; Vascular contributions to cognitive impairment and dementia; White matter; Neuroinflammation; | |
DOI : 10.1186/s13293-023-00513-y | |
received in 2023-01-09, accepted in 2023-04-17, 发布年份 2023 | |
来源: Springer | |
【 摘 要 】
BackgroundDamage to the cerebral vasculature can lead to vascular contributions to cognitive impairment and dementia (VCID). A reduction in blood flow to the brain leads to neuropathology, including neuroinflammation and white matter lesions that are a hallmark of VCID. Mid-life metabolic disease (obesity, prediabetes, or diabetes) is a risk factor for VCID which may be sex-dependent (female bias).MethodsWe compared the effects of mid-life metabolic disease between males and females in a chronic cerebral hypoperfusion mouse model of VCID. C57BL/6J mice were fed a control or high fat (HF) diet starting at ~ 8.5 months of age. Three months after diet initiation, sham or unilateral carotid artery occlusion surgery (VCID model) was performed. Three months later, mice underwent behavior testing and brains were collected to assess pathology.ResultsWe have previously shown that in this VCID model, HF diet causes greater metabolic impairment and a wider array of cognitive deficits in females compared to males. Here, we report on sex differences in the underlying neuropathology, specifically white matter changes and neuroinflammation in several areas of the brain. White matter was negatively impacted by VCID in males and HF diet in females, with greater metabolic impairment correlating with less myelin markers in females only. High fat diet led to an increase in microglia activation in males but not in females. Further, HF diet led to a decrease in proinflammatory cytokines and pro-resolving mediator mRNA expression in females but not males.ConclusionsThe current study adds to our understanding of sex differences in underlying neuropathology of VCID in the presence of a common risk factor (obesity/prediabetes). This information is crucial for the development of effective, sex-specific therapeutic interventions for VCID.
【 授权许可】
CC BY
© The Author(s) 2023
【 预 览 】
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