Cited by 77Alzheimer's disease research and treatmentsNeuroscience and Neuropharmacology ResearchNeuroinflammation and Neurodegeneration Mechanisms

Alzheimer's Disease Risk Factor Pyk2 Mediates Amyloid-β-Induced Synaptic Dysfunction and Loss

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Salazar, Santiago V., Cox, Timothy O., Lee, Suho, Brody, A. Harrison, Chyung, Annabel S., Haas, Laura T., Strittmatter, Stephen M.·2019·The Journal of Neuroscience

Abstract

Dozens of genes have been implicated in late onset Alzheimer's disease (AD) risk, but none has a defined mechanism of action in neurons. Here, we show that the risk factor Pyk2 (PTK2B) localizes specifically to neurons in adult brain. Absence of Pyk2 has no major effect on synapse formation or the basal parameters of synaptic transmission in the hippocampal Schaffer collateral pathway. However, the induction of synaptic LTD is suppressed in Pyk2-null slices. In contrast, deletion of Pyk2 expression does not alter LTP under control conditions. Of relevance for AD pathophysiology, Pyk2−/−slices are protected from amyloid-β-oligomer (Aβo)-induced suppression of LTP in hippocampal slices. Acutely, a Pyk2 kinase inhibitor also prevents Aβo-induced suppression of LTP in WT slices. Female and male transgenic AD model mice expressing APPswe/PSEN1ΔE9 require Pyk2 for age-dependent loss of synaptic markers and for impairment of learning and memory. However, absence of Pyk2 does not alter Aβ accumulation or gliosis. Therefore, the Pyk2 risk gene is directly implicated in a neuronal Aβo signaling pathway impairing synaptic anatomy and function. SIGNIFICANCE STATEMENT Genetic variation at the Pyk2 (PTK2B) locus is a risk for late onset Alzheimer's disease (AD), but the pathophysiological role of Pyk2 is not clear. Here, we studied Pyk2 neuronal function in mice lacking expression with and without transgenes generating amyloid-β (Aβ) plaque pathology. Pyk2 is not required for basal synaptic transmission or LTP, but participates in LTD. Hippocampal slices lacking Pyk2 are protected from AD-related Aβ oligomer suppression of synaptic plasticity. In transgenic AD model mice, deletion of Pyk2 rescues synaptic loss and learning/memory deficits. Therefore, Pyk2 plays a central role in AD-related synaptic dysfunction mediating Aβ-triggered dysfunction.

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Cited by

Sorted by citations

Authors
Salazar, S. V., Cox, T. O., Lee, S., Brody, A. H., Chyung, A. S., Haas, L. T., & Strittmatter, S. M.
Affiliations
Yale University (US)
Venue
The Journal of Neuroscience
Published
2018-12-05
Volume
39
Issue
4
Pages
758-772
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2902154838
Cited by
77
References
9
Citations by year
2026: 9 · 2025: 5 · 2024: 5 · 2023: 8 · 2022: 14 · 2021: 19 · 2020: 9 · 2019: 8
FWCI
5.98
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute on Aging (RF1AG053000, P50AG047270, R01AG034924)
  • National Institute of Neurological Disorders and Stroke (R35NS097283, T32NS007224)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
Pyk2, Alzheimer's disease, amyloid-beta oligomers, synaptic dysfunction, synaptic loss, long-term depression, long-term potentiation, hippocampus, Schaffer collaterals, learning and memory impairment, neuronal signaling
MeSH terms
Alzheimer Disease, Animals, Behavior, Animal, Female, Gliosis, Learning, Male, Memory, Mice, Inbred C57BL, Mice, Transgenic, Risk Factors, Synapses, Signal Transduction, Amyloid beta-Peptides, Long-Term Potentiation, Mice, Knockout, Long-Term Synaptic Depression, Mice, Focal Adhesion Kinase 2

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