Roasted Coffee Reduces β‐Amyloid Production by Increasing Proteasomal β‐Secretase Degradation in Human Neuroblastoma SH‐SY5Y Cells
Abstract
SCOPE: Epidemiological studies have shown that coffee consumption may be associated with a lower risk of developing several neurological disorders, including Alzheimer's disease (AD). Caffeine is a prominent candidate component underlying the preventive effects of coffee; however, the contribution of other constituents is unclear. To clarify this issue, the effect of roasting coffee beans on β-secretase (BACE1) expression in human neuroblastoma SH-SY5Y cells is investigated. METHODS AND RESULTS: Coffee (2%) reduces Aβ accumulation in culture medium to 80% of control levels after 24 h. Accordingly, BACE1 expression is decreased to 70% of control levels at 12 h. Experiments using cycloheximide and MG132, a proteasome inhibitor, reveal that coffee enhanced BACE1 degradation through activation of proteasomal activity. Furthermore, coffee activates cAMP-dependent protein kinase, and consequently, phosphorylation of a serine residue of proteasome 26S subunit, non-ATPase 11 (PSMD11). Pyrocatechol, a strong antioxidant known as catechol or 1,2-dihydroxybenzene, produced from chlorogenic acid during roasting, also reduces BACE1 expression by activation of proteasomal activity. Furthermore, pyrocatechol reduces Aβ production in SH-SY5Y cells. CONCLUSION: The data suggest that the roasting process may be crucial for the protective effects of coffee consumption in AD.
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The fraction of phenolic compounds, consisting mainly of caffeic acid, quinic acid, and the chlorogenic acids family, is suggested to be the main compounds responsible for the antioxidant and anti-inflammatory properties of coffee ground extracts.
“It is suggested that the fraction of phenolic compounds, consisting mainly of caffeic acid (CA), quinic acid (QA), and the chlorogenic acids family, are the main compounds responsible for these properties [145,146,147,148,149,150,151].”
From Multi-Target Mechanisms of Phytochemicals in Alzheimer’s Disease: Effects on Oxidative Stress, Neuroinflammation and Protein Aggregation (2022) · cites this paper as [148]
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- Authors
- Fukuyama, K., Kakio, S., Nakazawa, Y., Kobata, K., Funakoshi‐Tago, M., Suzuki, T., & Tamura, H.
- Affiliations
- Keio University (JP)
- Josai University (JP)
- Hokkaido University (JP)
- Corresponding author
- Tamura, Hiroomi
- Venue
- Molecular Nutrition & Food Research
- Publisher
- Wiley
- Published
- 2018-09-09
- Volume
- 62
- Issue
- 21
- Pages
- e1800238-e1800238
- ISSN
- 1613-4125 (ISSN-L)
- 1613-4133
- OpenAlex
- W2888681038
- Cited by
- 22
- References
- 25
- Citations by year
- 2025: 1 · 2024: 1 · 2023: 3 · 2022: 4 · 2021: 4 · 2020: 6 · 2019: 3
- FWCI
- 2.23
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Molecular Nutrition & Food Research (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Japan Society for the Promotion of Science (15K00883)
- Topics
- Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
- Health Sciences › Medicine › Pharmacology › Coffee research and impacts
- Health Sciences › Medicine › Complementary and alternative medicine › Medicinal Plants and Neuroprotection
- Keywords
- coffee roasting, amyloid-beta, BACE1, proteasomal degradation, Alzheimer's disease, catechol, chlorogenic acid, protein kinase A, neuroprotection, SH-SY5Y cells, coffee constituents
- MeSH terms
- Alzheimer Disease, Catechols, Coffee, Food Handling, Humans, Neuroblastoma, Plant Extracts, Amyloid beta-Peptides, Aspartic Acid Endopeptidases, Cyclic AMP-Dependent Protein Kinases, Cell Line, Tumor, Proteasome Endopeptidase Complex, Amyloid Precursor Protein Secretases, Proteolysis
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