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- W2005076304 abstract "Inflammation has been argued to play a primary role in the pathogenesis of Alzheimer's disease (AD). Lipopolysaccharide (LPS) activates the innate immune system, triggering gliosis and inflammation when injected in the central nervous system. In studies described here, APP transgenic mice were injected intrahippocampally with 4 or 10 μg of LPS and evaluated 1, 3, 7, 14, or 28 days later. Aβ load was significantly reduced at 3, 7, and 14 days but surprisingly returned near baseline 28 days after the injection. No effects of LPS on congophilic amyloid deposits could be detected. LPS also activated both microglia and astrocytes in a time-dependent manner. The GFAP astrocyte reaction and the Fcγ receptor microglial reaction peaked at 7 days after LPS injection, returning to baseline by 2 weeks postinjection. When stained for CD45, microglial activation was detected at all time points, although the morphology of these cells transitioned from an ameboid to a ramified and bushy appearance between 7 and 14 days postinjection. These results indicate that activation of brain glia can rapidly and transiently clear diffuse Aβ deposits but has no effect on compacted fibrillar amyloid." @default.
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- W2005076304 date "2004-11-01" @default.
- W2005076304 modified "2023-09-26" @default.
- W2005076304 title "Time-dependent reduction in Aβ levels after intracranial LPS administration in APP transgenic mice" @default.
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- W2005076304 doi "https://doi.org/10.1016/j.expneurol.2004.07.007" @default.
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