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- W4210403678 abstract "Introduction: Cerebral amyloid angiopathy (CAA) is a known cause of cognitive impairment and intracerebral hemorrhage in the elderly. Cerebral microbleeds (CMBs) detected on MRI are the diagnostic hallmarks of this disease. Recent studies have shown increased CMBs and worst cognition in female CAA mice as compared to males. The underlying mechanisms for this sexual dichotomy are unclear. We hypothesized that increased inflammatory response in females contributes to neuronal damage and cognitive decline in CAA. Methods: C57BL6 Tg-SwDI male and female mice (12 months) were used as a mouse model for CAA. Peripheral blood and brain tissues were collected and single cell suspensions were acquired for immunophenotyping using flow cytometry. We used CD45, CD11b, Ly6C and CD3 antibodies to gate for monocytes/macrophages (CD45 high CD11b + Ly6C + ) and T cells (CD45 high CD11b - CD3 + ) respectively. Data was analyzed using two sample t-test on GraphPad PRISM. Results: Our results demonstrated that in the peripheral blood, Tg-SwDI female mice had significantly increased frequency of monocytes/macrophages (CD45 + CD11b + Ly6C + ) as compared to males (females, 64±8.1%, n=10 vs. males, 33.9±6.9%, n=8, p=0.01). Similar to peripheral blood, there were significantly increased monocytes/macrophages (CD45 high CD11b + Ly6C + ) in the female brain (females, 36.5±6.3%, n=10, vs. males, 20.9±2.7%, n=8, p= 0.04). No significant differences were seen in T cells in the blood (females, 27±4.3% vs. males, 26.9±3.3%, p= 0.9) or brain (57.2±6.8% vs. 65.3±5.4%, p= 0.3). Conclusion: Recent studies suggest that vascular Aβ accumulation in CAA causes an innate inflammatory response, leading to further cognitive decline and CMB formation. Our results highlight a monocyte/macrophage driven pro-inflammatory milieu in female CAA mice which may contribute to worse outcomes. Regulation of monocytes/ macrophages and their cytokine-mediated inflammatory pathways may be a potential sex specific therapeutic target in CAA." @default.
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- W4210403678 date "2022-02-01" @default.
- W4210403678 modified "2023-09-27" @default.
- W4210403678 title "Abstract WMP23: Increased Central And Peripheral Monocytes/ Macrophages In Female Mice With Cerebral Amyloid Angiopathy" @default.
- W4210403678 doi "https://doi.org/10.1161/str.53.suppl_1.wmp23" @default.
- W4210403678 hasPublicationYear "2022" @default.
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