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- W4318470708 abstract "The zinc-binding protein S100β has been identified as an interacting partner with the microtubule-associated protein tau. Both proteins are individually affected in Alzheimer9s disease (AD). S100β, is overexpressed in the disease, whereas hyperphosphorylated tau constitutes the primary component of neurofibrillary tangles. In this study, we examine factors that modulate their binding and the potential role the complex may play in AD pathogenesis. Zinc was identified as a critical component in the binding process and a primary modulator of S100β-associated cellular responses. Abnormally phosphorylated tau extracted from AD tissue displayed a dramatically reduced capacity to bind S100β, which was restored by pretreatment with alkaline phosphatase. In differentiated SH-SY5Y cells, exogenous S100β was internalized and colocalized with tau consistent with an intracellular association. This was enhanced by the addition of zinc and eliminated by divalent metal chelators. S100β uptake was also accompanied by extensive neurite outgrowth that may be mediated by its interaction with tau. S100β-tau binding may represent a key pathway for neurite development, possibly through S100β modulation of tau phosphorylation and/or functional stabilization of microtubules and process formation. S100β–tau interaction may be disrupted by hyperphosphorylation and/or imbalances in zinc metabolism, and this may contribute to the neurite dystrophy associated with AD." @default.
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- W4318470708 date "2001-04-01" @default.
- W4318470708 modified "2023-10-17" @default.
- W4318470708 title "S100β Interaction with Tau Is Promoted by Zinc and Inhibited by Hyperphosphorylation in Alzheimer's Disease" @default.
- W4318470708 doi "https://doi.org/10.1523/jneurosci.21-07-02240.2001" @default.
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