Cited by 154Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchNeuroinflammation and Neurodegeneration Mechanisms

A Synthetic Peptide Blocking the Apolipoprotein E/β-Amyloid Binding Mitigates β-Amyloid Toxicity and Fibril Formation in Vitro and Reduces β-Amyloid Plaques in Transgenic Mice

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Sadowski, Marcin, Pankiewicz, Joanna, Scholtzova, Henrieta, Ripellino, James A., Li, Yongsheng, Schmidt, Stephen D., Mathews, Paul M., Fryer, John D. +3 more·2004·The American Journal of Pathology

Abstract

Alzheimer's disease (AD) is associated with accumulation of beta-amyloid (Abeta). A major genetic risk factor for sporadic AD is inheritance of the apolipoprotein (apo) E4 allele. ApoE can act as a pathological chaperone of Abeta, promoting its conformational transformation from soluble Abeta into toxic aggregates. We determined if blocking the apoE/Abeta interaction reduces Abeta load in transgenic (Tg) AD mice. The binding site of apoE on Abeta corresponds to residues 12 to 28. To block binding, we synthesized a peptide containing these residues, but substituted valine at position 18 to proline (Abeta12-28P). This changed the peptide's properties, making it non-fibrillogenic and non-toxic. Abeta12-28P competitively blocks binding of full-length Abeta to apoE (IC50 = 36.7 nmol). Furthermore, Abeta12-28P reduces Abeta fibrillogenesis in the presence of apoE, and Abeta/apoE toxicity in cell culture. Abeta12-28P is blood-brain barrier-permeable and in AD Tg mice inhibits Abeta deposition. Tg mice treated with Abeta12-28P for 1 month had a 63.3% reduction in Abeta load in the cortex (P = 0.0043) and a 59.5% (P = 0.0087) reduction in the hippocampus comparing to age-matched control Tg mice. Antibodies against Abeta were not detected in sera of treated mice; therefore the observed therapeutic effect of Abeta12-28P cannot be attributed to an antibody clearance response. Our experiments demonstrate that compounds blocking the interaction between Abeta and its pathological chaperones may be beneficial for treatment of beta-amyloid deposition in AD.

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Authors
Sadowski, M., Pankiewicz, J., Scholtzova, H., Ripellino, J. A., Li, Y., Schmidt, S. D., Mathews, P. M., Fryer, J. D., Holtzman, D. M., Sigurdsson, E. M., & Wisniewski, T.
Affiliations
  • New York University (US)
  • Nathan Kline Institute for Psychiatric Research (US)
  • Washington University in St. Louis (US)
Venue
The American Journal of Pathology
Publisher
Elsevier BV
Published
2004-09
Volume
165
Issue
3
Pages
937-948
ISSN
0002-9440 (ISSN-L)
OpenAlex
W2164642027
Cited by
154
References
87
Citations by year
2026: 6 · 2025: 6 · 2024: 5 · 2023: 4 · 2022: 9 · 2021: 5 · 2020: 7 · 2019: 6 · 2018: 2 · 2017: 1 · 2016: 2 · 2015: 4 · 2014: 9 · 2013: 8 · 2012: 10
FWCI
7.20
Type
journal article
Language
en
Open access
Locations
  • American Journal Of Pathology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institutes of Health (AG15408, AG20747, AG13956)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
Alzheimer's disease, amyloid-beta, apolipoprotein E, APOE ε4, peptide antagonists, amyloid fibril formation, amyloid plaques, transgenic mice, blood-brain barrier permeability, amyloid deposition
MeSH terms
Alzheimer Disease, Animals, Apolipoproteins E, Astrocytes, Binding Sites, Blood-Brain Barrier, Brain, Competitive Bidding, Female, Half-Life, Humans, Male, Membrane Proteins, Mice, Inbred C57BL, Mice, Transgenic, Mutation, Neuroblastoma, Peptide Fragments, Protein Binding, Tumor Cells, Cultured, Amyloid beta-Peptides, Mice, Knockout, Mice, Presenilin-1

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