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Neurosci Lett. 1992 Nov 23;147(1):58-62.

Glycogen synthase kinase-3 induces Alzheimer's disease-like phosphorylation of tau: generation of paired helical filament epitopes and neuronal localisation of the kinase.

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Department of Neuroscience, Institute of Psychiatry, London, UK.


Glycogen synthase kinase-3 (GSK-3) reduced the mobility of human tau on SDS-PAGE, prevented binding of the monoclonal antibody (mAb), Tau.1, and induced binding of the mAb 8D8. Recombinant tau phosphorylated by GSK-3 aligned on SDS-PAGE with the abnormally phosphorylated tau (PHF-tau) associated with the paired helical filaments in Alzheimer's disease brain. Phosphorylated serine396 (numbering of the largest human brain tau isoform) was identified as a binding site on tau for mAb 8D8. The localisation of GSK-3 within granular structures in pyramidal cells indicates that GSK-3 alpha and GSK-3 beta may have a role in the production of PHF-tau in Alzheimer's disease.

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