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• W4308289301 endingPage "100501" @default.
• W4308289301 startingPage "100501" @default.
• W4308289301 abstract "Aging has a significant impact on physiology with implications for central nervous system function coincident with increased vulnerability to stress exposures. A number of stress-sensitive molecular mechanisms are hypothesized to underpin age-related changes in brain function. Recent cumulative evidence also suggests that aging impacts gut microbiota composition. However, the impact of such effects on the ability of mammals to respond to stress in aging is still relatively unexplored. Therefore, in this study we assessed the ability of a microbiota-targeted intervention (the prebiotic FOS-Inulin) to alleviate age-related responses to stress. Exposure of aged C57BL/6 mice to social defeat led to an altered social interaction phenotype in the social interaction test, which was reversed by FOS-Inulin supplementation. Interestingly, this occured independent of affecting social defeat-induced elevations in the stress hormone corticosterone. Additionally, the behavioral modifications following FOS-Inulin supplementation were also not coincident with improvement of pro-inflammatory markers. Metabolomics analysis was performed and intriguingly, age associated metabolites were shown to be reduced in the prefrontal cortex of stressed aged mice and this deficit was recovered by FOS-Inulin supplementation. Taken together these results suggest that prebiotic dietary intervention rescued the behavioral response to stress in aged mice, not through amelioration of the inflammatory response, but by restoring the levels of key metabolites in the prefrontal cortex of aged animals. Therefore, dietary interventions could be a compelling avenue to improve the molecular and behavioral manifestations of chronic stress exposures in aging via targeting the microbiota-gut brain axis." @default.
• W4308289301 created "2022-11-10" @default.
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• W4308289301 date "2022-11-01" @default.
• W4308289301 modified "2023-10-17" @default.
• W4308289301 title "Prebiotic supplementation modulates selective effects of stress on behavior and brain metabolome in aged mice" @default.
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