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- W3138344250 abstract "Background: Social isolation (SI) and loneliness are risk factors for stroke. Epidemiological studies have shown that women tend to have a higher risk of stroke at later age and elderly women are more likely to be isolated. The mechanisms underlying the detrimental effects of SI have not been well studied in older females. We hypothesized that SI in aged female mice would lead to impaired post-stroke recovery and could lead to differential regulation of microRNAs (miRNAs). Methods: In this study, aged C57BL/6N female mice were subjected to a 60-minute middle cerebral artery occlusion (MCAO) and were randomly assigned to either single housing (SI) or continued pair housing (PH) immediately after stroke for 15 days. Infarct size, mortality and recovery was assessed using open field, the adhesive-tape removal task and the Y-maze test. MiRNAs were comprehensively analyzed by miRNAome analysis on stroke brain, and changes in hippocampal cell proliferation was assessed from perfused brain sections. Results: Importantly, SI immediately after stroke led to significantly larger tissue loss and higher mortality in aged females, it also significantly delayed motor/sensory recovery in the adhesive removal test and impaired overall locomotor activity. In addition, these mice also demonstrated worse post-stroke cognitive function. In parallel, brains of these mice showed reduced miR-297a-3p expression and increased miR-18a-3p and miR-200c-3p expression with SI compared to PH cohort and reduced hippocampal cell proliferation. Conclusion: The results from this study suggest that SI after stroke can increase mortality and significantly impair post-stroke recovery in aged female mice. These worse outcomes are in parallel to the significant changes in several miRNAs and reduced hippocampal cell proliferation." @default.
- W3138344250 created "2021-03-29" @default.
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- W3138344250 date "2021-03-01" @default.
- W3138344250 modified "2023-09-23" @default.
- W3138344250 title "Abstract P757: Social Isolation After Stroke Reduces Cell Proliferation and Alters Brain MiRNA Profiles in the Aged Female Mice" @default.
- W3138344250 doi "https://doi.org/10.1161/str.52.suppl_1.p757" @default.
- W3138344250 hasPublicationYear "2021" @default.
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