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- W2000608506 abstract "Alzheimer's disease and other related neurodegenerative disorders known as tauopathies are characterized by the accumulation of abnormally phosphorylated and aggregated forms of the microtubule-associated protein tau. Several laboratories have identified a 17 kD proteolytic fragment of tau in degenerating neurons and in numerous cell culture models that is generated by calpain cleavage and speculated to contribute to tau toxicity. In the current study, we employed a Drosophila tauopathy model to investigate the importance of calpain-mediated tau proteolysis in contributing to tau neurotoxicity in an animal model of human neurodegenerative disease. We found that mutations that disrupted endogenous calpainA or calpainB activity in transgenic flies suppressed tau toxicity. Expression of a calpain-resistant form of tau in Drosophila revealed that mutating the putative calpain cleavage sites that produce the 17 kD fragment was sufficient to abrogate tau toxicity in vivo. Furthermore, we found significant toxicity in the fly retina associated with expression of only the 17 kD tau fragment. Collectively, our data implicate calpain-mediated proteolysis of tau as an important pathway mediating tau neurotoxicity in vivo." @default.
- W2000608506 created "2016-06-24" @default.
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- W2000608506 date "2011-08-17" @default.
- W2000608506 modified "2023-10-14" @default.
- W2000608506 title "Implicating Calpain in Tau-Mediated Toxicity In Vivo" @default.
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- W2000608506 doi "https://doi.org/10.1371/journal.pone.0023865" @default.
- W2000608506 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3157467" @default.
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