Cited by 635Alzheimer's disease research and treatmentsCellular transport and secretionNeuroinflammation and Neurodegeneration Mechanisms

Endocytosis Is Required for Synaptic Activity-Dependent Release of Amyloid-β In Vivo

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Cirrito, John R., Kang, Jae-Eun, Lee, Jiyeon, Stewart, Floy R., Verges, Deborah K., Silverio, Luz M., Bu, Guojun, Mennerick, Steven +1 more·2008·Neuron

Abstract

Aggregation of amyloid-beta (Abeta) peptide into soluble and insoluble forms within the brain extracellular space is central to the pathogenesis of Alzheimer's disease. Full-length amyloid precursor protein (APP) is endocytosed from the cell surface into endosomes where it is cleaved to produce Abeta. Abeta is subsequently released into the brain interstitial fluid (ISF). We hypothesized that synaptic transmission results in more APP endocytosis, thereby increasing Abeta generation and release into the ISF. We found that inhibition of clathrin-mediated endocytosis immediately lowers ISF Abeta levels in vivo. Two distinct methods that increased synaptic transmission resulted in an elevation of ISF Abeta levels. Inhibition of endocytosis, however, prevented the activity-dependent increase in Abeta. We estimate that approximately 70% of ISF Abeta arises from endocytosis-associated mechanisms, with the vast majority of this pool also dependent on synaptic activity. These findings have implications for AD pathogenesis and may provide insights into therapeutic intervention.

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Crossref · 10.1016/j.neuron.2008.02.003

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Authors
Cirrito, J. R., Kang, J.-E., Lee, J., Stewart, F. R., Verges, D. K., Silverio, L. M., Bu, G., Mennerick, S., & Holtzman, D. M.
Affiliations
Washington University in St. Louis (US)
Corresponding author
Cirrito, John R.
Venue
Neuron
Publisher
Elsevier BV
Published
2008-04
Volume
58
Issue
1
Pages
42-51
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2060351135
Cited by
635
References
51
Citations by year
2026: 12 · 2025: 24 · 2024: 26 · 2023: 34 · 2022: 23 · 2021: 46 · 2020: 29 · 2019: 37 · 2018: 33 · 2017: 42 · 2016: 29 · 2015: 34 · 2014: 44 · 2013: 47 · 2012: 49
FWCI
27.98
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • Rare & Special e-Zone (The Hong Kong University of Science and Technology) (submittedVersion)
Funders
  • Israel Science Foundation
  • National Institute on Aging (R01AG027924, R01AG013956, R37AG027924, AG027924, K01AG029524, R37AG013956, AG13956, AG029524)
  • National Institute of Mental Health (MH-78823, R01MH078823)
  • National Institute on Drug Abuse (DA07261, T32DA007261)
  • National Institute of Neurological Disorders and Stroke (NS-54174, R01NS054174, P30NS057105)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
amyloid-beta, endocytosis, clathrin-mediated endocytosis, amyloid precursor protein, synaptic transmission, brain interstitial fluid, Alzheimer's disease, endosomes, activity-dependent release, APP processing
MeSH terms
Alzheimer Disease, Animals, Endocytosis, Mice, Inbred C57BL, Mice, Transgenic, Synaptic Transmission, Synapses, Amyloid beta-Peptides, Mice

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