Cited by 81Alzheimer's disease research and treatmentsProtein Kinase Regulation and GTPase SignalingNeurobiology and Insect Physiology Research

Activation of PAR-1 Kinase and Stimulation of Tau Phosphorylation by Diverse Signals Require the Tumor Suppressor Protein LKB1

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Wang, Ji-Wu, Imai, Yuzuru, Lu, Bingwei·2007·The Journal of Neuroscience

Abstract

Aberrant phosphorylation of tau is associated with a number of neurodegenerative diseases, including Alzheimer's disease (AD). The molecular mechanisms by which tau phosphorylation is regulated under normal and disease conditions are not well understood. Microtubule affinity regulating kinase (MARK) and PAR-1 have been identified as physiological tau kinases, and aberrant phosphorylation of MARK/PAR-1 target sites in tau has been observed in AD patients and animal models. Here we show that phosphorylation of PAR-1 by the tumor suppressor protein LKB1 is required for PAR-1 activation, which in turn promotes tau phosphorylation in Drosophila. Diverse stress stimuli, such as high osmolarity and overexpression of the human beta-amyloid precursor protein, can promote PAR-1 activation and tau phosphorylation in an LKB1-dependent manner. These results reveal a new function for the tumor suppressor protein LKB1 in a signaling cascade through which the phosphorylation and function of tau is regulated by diverse signals under physiological and pathological conditions.

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Crossref · 10.1523/jneurosci.5094-06.2007

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Authors
Wang, J.-W., Imai, Y., & Lu, B.
Affiliations
VA Palo Alto Health Care System (US)
Corresponding author
Lu, Bingwei
Venue
The Journal of Neuroscience
Published
2007-01-17
Volume
27
Issue
3
Pages
574-581
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2051978668
Cited by
80
References
51
Citations by year
2026: 5 · 2024: 2 · 2023: 1 · 2022: 5 · 2021: 1 · 2020: 5 · 2019: 5 · 2018: 2 · 2017: 7 · 2016: 4 · 2015: 4 · 2014: 6 · 2013: 4 · 2012: 4
FWCI
3.35
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • McKnight Foundation
  • National Institutes of Health
  • National Institute of Neurological Disorders and Stroke (NS043167, R01NS043167)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurobiology and Insect Physiology Research
Keywords
LKB1, tau phosphorylation, Mark, Alzheimer's disease, tumor suppressor proteins, kinase activation, osmotic stress, amyloid precursor protein, Drosophila, neurodegeneration, signaling pathways
MeSH terms
AMP-Activated Protein Kinase Kinases, Animals, Drosophila, Enzyme Activation, Gene Expression Regulation, Humans, Phosphorylation, Protein Kinases, Signal Transduction, tau Proteins, Protein Serine-Threonine Kinases, Tauopathies, Tumor Suppressor Proteins, Drosophila Proteins, Animals, Genetically Modified, Glycogen Synthase Kinase 3

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