Cited by 2,336Alzheimer's disease research and treatmentsCurcumin's Biomedical ApplicationsDementia and Cognitive Impairment Research

Curcumin Inhibits Formation of Amyloid β Oligomers and Fibrils, Binds Plaques, and Reduces Amyloid in Vivo

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Yang, Fusheng, Lim, Giselle P., Begum, Aynun N., Ubeda, Oliver J., Simmons, Mychica R., Ambegaokar, Surendra S., Chen, Pingping P., Kayed, Rakez +3 more·2005·Journal of Biological Chemistry

Abstract

Alzheimer's disease (AD) involves amyloid beta (Abeta) accumulation, oxidative damage, and inflammation, and risk is reduced with increased antioxidant and anti-inflammatory consumption. The phenolic yellow curry pigment curcumin has potent anti-inflammatory and antioxidant activities and can suppress oxidative damage, inflammation, cognitive deficits, and amyloid accumulation. Since the molecular structure of curcumin suggested potential Abeta binding, we investigated whether its efficacy in AD models could be explained by effects on Abeta aggregation. Under aggregating conditions in vitro, curcumin inhibited aggregation (IC(50) = 0.8 microM) as well as disaggregated fibrillar Abeta40 (IC(50) = 1 microM), indicating favorable stoichiometry for inhibition. Curcumin was a better Abeta40 aggregation inhibitor than ibuprofen and naproxen, and prevented Abeta42 oligomer formation and toxicity between 0.1 and 1.0 microM. Under EM, curcumin decreased dose dependently Abeta fibril formation beginning with 0.125 microM. The effects of curcumin did not depend on Abeta sequence but on fibril-related conformation. AD and Tg2576 mice brain sections incubated with curcumin revealed preferential labeling of amyloid plaques. In vivo studies showed that curcumin injected peripherally into aged Tg mice crossed the blood-brain barrier and bound plaques. When fed to aged Tg2576 mice with advanced amyloid accumulation, curcumin labeled plaques and reduced amyloid levels and plaque burden. Hence, curcumin directly binds small beta-amyloid species to block aggregation and fibril formation in vitro and in vivo. These data suggest that low dose curcumin effectively disaggregates Abeta as well as prevents fibril and oligomer formation, supporting the rationale for curcumin use in clinical trials preventing or treating AD.

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Crossref · 10.1074/jbc.m404751200

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Authors
Yang, F., Lim, G. P., Begum, A. N., Ubeda, O. J., Simmons, M. R., Ambegaokar, S. S., Chen, P. P., Kayed, R., Glabe, C. G., Frautschy, S. A., & Cole, G. M.
Affiliations
  • University of California, Los Angeles (US)
  • University of California, Irvine (US)
Corresponding author
Cole, Gregory M.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2005-02
Volume
280
Issue
7
Pages
5892-5901
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2159879659
Cited by
2,336
References
62
Citations by year
2026: 67 · 2025: 100 · 2024: 83 · 2023: 111 · 2022: 117 · 2021: 127 · 2020: 136 · 2019: 129 · 2018: 120 · 2017: 131 · 2016: 141 · 2015: 126 · 2014: 122 · 2013: 130 · 2012: 139
FWCI
30.83
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • National Institute on Aging (P50AG016570, R01AG013741, R01AG010685)
  • National Institute of Neurological Disorders and Stroke (R01NS043946, NS43946)
  • National Center for Complementary and Integrative Health (R01AT003008)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Medicine › Curcumin's Biomedical Applications
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
Keywords
curcumin, amyloid-beta, Alzheimer's disease, amyloid aggregation inhibition, amyloid oligomers, fibril formation, amyloid plaques, Tg2576 mice, blood-brain barrier, anti-inflammatory activity, antioxidant activity, Aβ40, amyloid-beta 42
MeSH terms
Alzheimer Disease, Animals, Anti-Inflammatory Agents, Non-Steroidal, Benzoates, Biphenyl Compounds, Blood-Brain Barrier, Brain, Congo Red, Curcumin, Diamines, Humans, Ibuprofen, Mice, Transgenic, Naproxen, Peptide Fragments, Protein Binding, Protein Denaturation, Pyridazines, Solubility, Thiazoles, Amyloid beta-Peptides, Protein Structure, Quaternary, Cell Line, Tumor, Mice, Benzothiazoles, Plaque, Amyloid

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