Cited by 3,506Alzheimer's disease research and treatmentsNeuroinflammation and Neurodegeneration MechanismsDementia and Cognitive Impairment Research

Diffusible, nonfibrillar ligands derived from Aβ 1–42 are potent central nervous system neurotoxins

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Lambert, M. P., Barlow, A. K., Chromy, B. A., Edwards, C., Freed, R., Liosatos, M., Morgan, T. E., Rozovsky, I. +7 more·1998·Proceedings of the National Academy of Sciences

Abstract

Abeta1-42 is a self-associating peptide whose neurotoxic derivatives are thought to play a role in Alzheimer's pathogenesis. Neurotoxicity of amyloid beta protein (Abeta) has been attributed to its fibrillar forms, but experiments presented here characterize neurotoxins that assemble when fibril formation is inhibited. These neurotoxins comprise small diffusible Abeta oligomers (referred to as ADDLs, for Abeta-derived diffusible ligands), which were found to kill mature neurons in organotypic central nervous system cultures at nanomolar concentrations. At cell surfaces, ADDLs bound to trypsin-sensitive sites and surface-derived tryptic peptides blocked binding and afforded neuroprotection. Germ-line knockout of Fyn, a protein tyrosine kinase linked to apoptosis and elevated in Alzheimer's disease, also was neuroprotective. Remarkably, neurological dysfunction evoked by ADDLs occurred well in advance of cellular degeneration. Without lag, and despite retention of evoked action potentials, ADDLs inhibited hippocampal long-term potentiation, indicating an immediate impact on signal transduction. We hypothesize that impaired synaptic plasticity and associated memory dysfunction during early stage Alzheimer's disease and severe cellular degeneration and dementia during end stage could be caused by the biphasic impact of Abeta-derived diffusible ligands acting upon particular neural signal transduction pathways.

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Crossref · 10.1073/pnas.95.11.6448

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Authors
Lambert, M. P., Barlow, A. K., Chromy, B. A., Edwards, C., Freed, R., Liosatos, M., Morgan, T. E., Rozovsky, I., Trommer, B., Viola, K. L., Wals, P., Zhang, C., Finch, C. E., Krafft, G. A., & Klein, W. L.
Affiliations
Northwestern University (US)
Venue
Proceedings of the National Academy of Sciences
Published
1998-05-26
Volume
95
Issue
11
Pages
6448-6453
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2165021720
Cited by
3,506
References
68
Citations by year
2026: 61 · 2025: 69 · 2024: 82 · 2023: 81 · 2022: 101 · 2021: 115 · 2020: 137 · 2019: 105 · 2018: 127 · 2017: 138 · 2016: 139 · 2015: 152 · 2014: 171 · 2013: 188 · 2012: 196
FWCI
29.85
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
Keywords
amyloid-beta 42, neurotoxicity, Alzheimer's disease, Fyn tyrosine kinase, neuroprotection, hippocampal long-term potentiation, synaptic plasticity, signal transduction, organotypic brain cultures
MeSH terms
Alzheimer Disease, Animals, Brain, Cell Membrane, Cells, Cultured, Ligands, Neurotoxins, Amyloid beta-Peptides, Cell Death, Mice

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