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• W1667036300 abstract "The relationship between the pathogenic amyloid β-peptide species Aβ1–42 and tau pathology has been well studied and suggests that Aβ1–42 can accelerate tau pathology in vitro and in vivo. The manners if any in which Aβ1–40 interacts with tau remains poorly understood. In order to answer this question, we used cell-based system, transgenic fly and transgenic mice as models to study the interaction between Aβ1–42 and Aβ1–40. In our established cellular model, live cell imaging (using confocal microscopy) combined with biochemical data showed that exposure to Aβ1–42 induced cleavage, phosphorylation and aggregation of wild-type/full length tau while exposure to Aβ1–40 didn’t. Functional studies with Aβ1–40 were carried out in tau-GFP transgenic flies and showed that Aβ1–42, as previously reported, disrupted cytoskeletal structure while Aβ1–40 had no effect at same dose. To further explore how Aβ1–40 affects tau pathology in vivo, P301S mice (tau transgenic mice) were injected intracerebrally with either Aβ1–42 or Aβ1–40. We found that treatment with Aβ1–42 induced tau phosphorylation, cleavage and aggregation of tau in P301S mice. By contrast, Aβ1–40 injection didn’t alter total tau, phospho-tau (recognized by PHF-1) or cleavage of tau, but interestingly, phosphorylation at Ser262 was shown to be significantly decreased after direct inject of Aβ1–40 into the entorhinal cortex of P301S mice. These results demonstrate that Aβ1–40 plays different role in tau pathogenesis compared to Aβ1–42. Aβ1–40 may have a protective role in tau pathogenesis by reducing phosphorylation at Ser262, which has been shown to be neurotoxic." @default.
• W1667036300 created "2016-06-24" @default.
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• W1667036300 date "2014-01-01" @default.
• W1667036300 modified "2023-10-02" @default.
• W1667036300 title "Tau pathogenesis is promoted by Aβ1-42 but not Aβ1-40" @default.
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• W1667036300 doi "https://doi.org/10.1186/1750-1326-9-52" @default.
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