Cited by 44Nicotinic Acetylcholine Receptors StudyAlzheimer's disease research and treatmentsNeuroscience and Neuropharmacology Research

Peptide Blockers of the Inhibition of Neuronal Nicotinic Acetylcholine Receptors by Amyloid β

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Magdesian, Margaret H., Nery, Arthur A., Martins, A. Henrique B., Juliano, Maria Aparecida, Juliano, Luiz, Ulrich, Henning, Ferreira, Sérgio T.·2005·Journal of Biological Chemistry

Abstract

Alzheimer disease (AD) is characterized by accumulation of the neurotoxic amyloid beta peptide (Abeta) and by the loss of cholinergic neurons and nicotinic acetylcholine receptors (nAChRs) throughout the brain. Direct inhibition of nAChRs by Abeta has also been suggested to contribute to cholinergic dysfunction in AD. In an effort to find ligands capable of blocking Abeta-induced inhibition of nAChRs, we have screened a phage display library to identify peptides that bind to Abeta. Using this approach, we identified a heptapeptide denoted IQ, which binds with nanomolar affinity to Abeta and is homologous to the acetylcholine-binding protein and to most subtypes of nAChRs. Rapid kinetic whole-cell current-recording measurements showed that Abeta inhibits nAChR function in a dose-dependent manner in neuronal differentiated PC12 cells and that nanomolar concentrations of IQ completely block the inhibition by Abeta. These results indicate that the Abeta binding site in nAChRs is homologous to the IQ peptide and that this is a relevant target for Abeta neurotoxicity in AD and, more generally, for the regulation of nAChR function by soluble Abeta in a physiological context. Furthermore, the results suggest that the IQ peptide may be a lead for the development of novel drugs to block the inhibition of nAChRs in AD.

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Crossref · 10.1074/jbc.m502406200

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  • Other putative receptors/co-receptors involved in neuronal binding of Aβ oligomers include the p75 neurotrophin receptor, RAGE, nicotinic acetylcholine receptors and Frizzled.

    “Other putative receptors/co-receptors involved in neuronal binding of Aβ oligomers include the p75 neurotrophin receptor (p75NTR) (Knowles et al., 2009), the receptor for advanced glycation end products (RAGE) (Sturchler et al., 2008), nicotinic acetylcholine receptors (Magdesian et al., 2005) and Frizzled (Magdesian et al., 2008).”

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Authors
Magdesian, M. H., Nery, A. A., Martins, A. H. B., Juliano, M. A., Juliano, L., Ulrich, H., & Ferreira, S. T.
Affiliations
  • Universidade Federal do Rio de Janeiro (BR)
  • Universidade de São Paulo (BR)
  • Universidade Federal de São Paulo (BR)
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2005-09
Volume
280
Issue
35
Pages
31085-31090
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1986686062
Cited by
44
References
35
Citations by year
2026: 1 · 2024: 3 · 2023: 1 · 2022: 2 · 2021: 1 · 2020: 2 · 2019: 2 · 2017: 1 · 2016: 1 · 2015: 1 · 2014: 1 · 2013: 4 · 2012: 3
FWCI
1.38
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Americanae (AECID Library) (publishedVersion, other-oa)
  • LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) (submittedVersion, other-oa)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Nicotinic Acetylcholine Receptors Study
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
amyloid-beta, neuronal nicotinic acetylcholine receptors, Alzheimer's disease, peptide antagonists, phage display, acetylcholine binding protein, receptor binding sites, cholinergic dysfunction, PC12 cells, neurotoxicity
MeSH terms
Alzheimer Disease, Amino Acid Sequence, Animals, Carbachol, Electrophysiology, Humans, Models, Molecular, Neurons, Peptides, Receptors, Nicotinic, Amyloid beta-Peptides, Sequence Alignment, PC12 Cells, Protein Structure, Tertiary, Cholinergic Agonists, Peptide Library, Rats

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