Cited by 1,265Alzheimer's disease research and treatmentsNeuroscience and Neuropharmacology ResearchNeuroinflammation and Neurodegeneration Mechanisms

Synaptic Activity Regulates Interstitial Fluid Amyloid-β Levels In Vivo

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Cirrito, John R., Yamada, Kelvin A., Finn, Mary Beth, Sloviter, Robert S., Bales, Kelly R., May, Patrick C., Schoepp, Darryle D., Paul, Steven M. +2 more·2005·Neuron

Abstract

Aggregation of the amyloid-beta (Abeta) peptide in the extracellular space of the brain is central to Alzheimer's disease pathogenesis. Abeta aggregation is concentration dependent and brain region specific. Utilizing in vivo microdialysis concurrently with field potential recordings, we demonstrate that Abeta levels in the brain interstitial fluid are dynamically and directly influenced by synaptic activity on a timescale of minutes to hours. Using an acute brain slice model, we show that the rapid effects of synaptic activity on Abeta levels are primarily related to synaptic vesicle exocytosis. These results suggest that synaptic activity may modulate a neurodegenerative disease process, in this case by influencing Abeta metabolism and ultimately region-specific Abeta deposition. The findings also have important implications for treatment development.

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Crossref · 10.1016/j.neuron.2005.10.028

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Authors
Cirrito, J. R., Yamada, K. A., Finn, M. B., Sloviter, R. S., Bales, K. R., May, P. C., Schoepp, D. D., Paul, S. M., Mennerick, S., & Holtzman, D. M.
Affiliations
  • Washington University in St. Louis (US)
  • University of Arizona (US)
  • Eli Lilly (United States) (US)
Corresponding author
Holtzman, David M.
Venue
Neuron
Publisher
Elsevier BV
Published
2005-12
Volume
48
Issue
6
Pages
913-922
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2046952010
Cited by
1,265
References
38
Citations by year
2026: 34 · 2025: 62 · 2024: 76 · 2023: 69 · 2022: 62 · 2021: 83 · 2020: 93 · 2019: 76 · 2018: 58 · 2017: 85 · 2016: 52 · 2015: 62 · 2014: 81 · 2013: 70 · 2012: 69
FWCI
15.98
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute on Aging (AG11355, AG13956, P01AG011355)
  • National Institute on Drug Abuse (DA70261)
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
amyloid-beta, synaptic activity, interstitial fluid, Alzheimer's disease, synaptic vesicle exocytosis, amyloid-beta metabolism, microdialysis, field potential recording
MeSH terms
Action Potentials, Alzheimer Disease, Animals, Brain, Exocytosis, Female, Hippocampus, Male, Mice, Inbred C57BL, Mice, Transgenic, Nerve Degeneration, Synaptic Transmission, Organ Culture Techniques, Synaptic Vesicles, Amyloid beta-Peptides, Microdialysis, Presynaptic Terminals, Mice, Knockout, Patch-Clamp Techniques, Perforant Pathway, Extracellular Fluid, Mice, Plaque, Amyloid

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