Glycogen synthase kinase 3 alteration in Alzheimer disease is related to neurofibrillary tangle formation - PubMed (original) (raw)

. 1996 Oct-Dec;29(2-3):253-61.

doi: 10.1007/BF02815006.

Affiliations

• PMID: 8971700
• DOI: 10.1007/BF02815006

Glycogen synthase kinase 3 alteration in Alzheimer disease is related to neurofibrillary tangle formation

L Baum et al. Mol Chem Neuropathol. 1996 Oct-Dec.

Abstract

Highly phosphorylated tau protein is the main component of paired helical filaments (PHF), which comprise the neurofibrillary tangles (NFT) in some neurons of patients with Alzheimer disease (AD). Glycogen synthase kinase 3 (GSK3) phosphorylates tau in vitro at several sites also found to be phosphorylated in PHF-tau; tau is phosphorylated at these sites in both AD and normal control (NC) brains, although the extent of phosphorylation is far greater in tau from AD. If GSK3 levels are increased in AD, then tau phosphorylation and perhaps PHF formation may occur. To quantify GSK3, blots of AD and NC brain supernatant and particulate fractions were probed with antibodies to GSK3. In particulate fractions of AD compared to NC, GSK3 alpha immunoreactivity did not increase, but in fact, decreased 40%, and GSK3 beta immunoreactivity decreased 30%. GSK3 alpha and GSK3 beta levels correlated well with each other. GSK3 levels correlated negatively with numbers of NFT.

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