Biophysical and In Vivo Studies Identify a New Natural-Based Polyphenol, Counteracting Aβ Oligomerization In Vitro and Aβ Oligomer-Mediated Memory Impairment and Neuroinflammation in an Acute Mouse Model of Alzheimer's Disease
Abstract
In this study natural-based complex polyphenols, obtained through a smart synthetic approach, have been evaluated for their ability to inhibit the formation of Aβ 42 oligomers, the most toxic species causing synaptic dysfunction, neuroinflammation, and neuronal death leading to the onset and progression of Alzheimer’s disease. In vitro neurotoxicity tests on primary hippocampal neurons have been employed to select nontoxic candidates. Solution NMR and molecular docking studies have been performed to clarify the interaction mechanism of Aβ 42 with the synthesized polyphenol derivatives, and highlight the sterical and chemical requirements important for their antiaggregating activity. NMR results indicated that the selected polyphenolic compounds target Aβ 42 oligomeric species. Combined NMR and docking studies indicated that the Aβ 42 central hydrophobic core, namely, the 17–31 region, is the main interaction site. The length of the peptidomimetic scaffold and the presence of a guaiacol moiety were identified as important requirements for the antiaggregating activity. In vivo experiments on an Aβ 42 oligomer-induced acute mouse model highlighted that the most promising polyphenolic derivative (PP04) inhibits detrimental effects of Aβ 42 oligomers on memory and glial cell activation. NMR kinetic studies showed that PP04 is endowed with the chemical features of true inhibitors, strongly affecting both the Aβ 42 nucleation and growth rates, thus representing a promising candidate to be further developed into an effective drug against neurodegenerative diseases of the amyloid type.
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A guaiacol moiety is required for anti-aggregating activity of polyphenolic inhibitors.
“a guaiacol moiety is required for the anti-aggregating activity of polyphenolic inhibitors (Tomaselli et al., 2019)”
From Exploring the Therapeutic Potential of Phytochemicals in Alzheimer’s Disease: Focus on Polyphenols and Monoterpenes (2022) · cites this paper as Tomaselli et al., 2019
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Piccialli, I., Tedeschi, V., Caputo, L., D’Errico, S., Ciccone, R., De Feo, V., Secondo, A., & Pannaccione, A. (2022) · Frontiers in Pharmacology · doi:10.3389/fphar.2022.876614 · Cited by 73 · see citing works
- Authors
- Tomaselli, S., La Vitola, P., Pagano, K., Brandi, E., Santamaria, G., Galante, D., D’Arrigo, C., Moni, L., Lambruschini, C., Banfi, L., Lucchetti, J., Fracasso, C., Molinari, H., Forloni, G., Balducci, C., & Ragona, L.
- Affiliations
- Institute for Macromolecular Studies (IT)
- Department of Neuroscience, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milan 20156, Italy
- Mario Negri Institute for Pharmacological Research (IT)
- Istituto per lo Studio delle Macromolecole (ISMAC), CNR, Genoa 16149, Italy
- University of Genoa (IT)
- Corresponding author
- Balducci, Claudia
- Ragona, Laura
- ORCID
- Venue
- ACS Chemical Neuroscience
- Publisher
- American Chemical Society (ACS)
- Published
- 2019-10-11
- Volume
- 10
- Issue
- 11
- Pages
- 4462-4475
- ISSN
- 1948-7193 (ISSN-L)
- OpenAlex
- W2979957602
- Cited by
- 29
- References
- 56
- Citations by year
- 2024: 7 · 2023: 4 · 2022: 6 · 2021: 5 · 2020: 6 · 2019: 1
- FWCI
- 3.10
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- Locations
- ACS Chemical Neuroscience (publishedVersion)
- PubMed (publishedVersion)
- CINECA IRIS Institutial Research Information System (University of Genoa) (submittedVersion)
- Funders
- Alzheimer's Association (NIRG-14-321500)
- Fondazione Cariplo (2015-0503)
- Fondazione Antonio de Marco
- Topics
- Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
- Health Sciences › Medicine › Pharmacology › Cholinesterase and Neurodegenerative Diseases
- Health Sciences › Medicine › Complementary and alternative medicine › Medicinal Plants and Neuroprotection
- Keywords
- Alzheimer's disease, polyphenol derivatives, memory impairment, neuroinflammation, hippocampal neurons, guaiacol, nucleation and growth kinetics, glial activation
- MeSH terms
- Acute Disease, Alzheimer Disease, Animals, Cells, Cultured, Disease Models, Animal, Inflammation, Memory Disorders, Mice, Inbred C57BL, Peptide Fragments, Amyloid beta-Peptides, Protein Structure, Secondary, Mice, Polyphenols, Molecular Docking Simulation
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