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- W2000655392 abstract "Recently, we have shown that the microtubule-associated protein tau is essential for β-amyloid (Aβ)-induced neurotoxicity in hippocampal neurons. However, the mechanisms by which tau mediates Aβ-induced neurite degeneration remain poorly understood. In the present study, we analyzed whether tau cleavage played a role in these events. Our results showed that pre-aggregated Aβ induced the generation of a 17 kDa tau fragment in cultured hippocampal neurons. The generation of this fragment was preceded by the activation of calpain-1. Conversely, inhibitors of this protease, but not of caspases, completely prevented tau proteolysis leading to the generation of the 17 kDa fragment and significantly reduced Aβ-induced neuronal death. Furthermore, the expression of this fragment in cultured hippocampal neurons induced the formation of numerous varicosity-bearing tortuous processes, as well as the complete degeneration of some of those neurite processes. These results suggest that Aβ-induced neurotoxicity may be mediated, at least in part, through the calpain-mediated generation of a toxic 17 kDa tau fragment. Collectively, these results provide insight into a novel mechanism by which tau could mediate Aβ-induced neurotoxicity." @default.
- W2000655392 created "2016-06-24" @default.
- W2000655392 creator A5039987199 @default.
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- W2000655392 date "2005-06-01" @default.
- W2000655392 modified "2023-10-16" @default.
- W2000655392 title "The Generation of a 17 kDa Neurotoxic Fragment: An Alternative Mechanism by which Tau Mediates β-Amyloid-Induced Neurodegeneration" @default.
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- W2000655392 doi "https://doi.org/10.1523/jneurosci.1125-05.2005" @default.
- W2000655392 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/1352316" @default.
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