Cited by 337Alzheimer's disease research and treatmentsNanoparticle-Based Drug DeliveryTea Polyphenols and Effects

Dual-drug loaded nanoparticles of Epigallocatechin-3-gallate (EGCG)/Ascorbic acid enhance therapeutic efficacy of EGCG in a APPswe/PS1dE9 Alzheimer's disease mice model

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Cano, Amanda, Ettcheto, Miren, Chang, Jui-Hsien, Barroso, Emma, Espina, Marta, Kühne, Britta A., Barenys, Marta, Auladell, Carmen +5 more·2019·Journal of Controlled Release

Abstract

Epigallocatechin-3-gallate (EGCG) is a candidate for treatment of Alzheimer's disease (AD) but its inherent instability limits bioavailability and effectiveness. We found that EGCG displayed increased stability when formulated as dual-drug loaded PEGylated PLGA nanoparticles (EGCG/AA NPs). Oral administration of EGCG/AA NPs in mice resulted in EGCG accumulation in all major organs, including the brain. Pharmacokinetic comparison of plasma and brain accumulation following oral administration of free or EGCG/AA NPs showed that, whilst in both cases initial EGCG concentrations were similar, long-term (5–25 h) concentrations were ca. 5 fold higher with EGCG/AA NPs. No evidence was found that EGCG/AA NPs utilised a specific pathway across the blood-brain barrier (BBB). However, EGCG, empty NPs and EGCG/AA NPs all induced tight junction disruption and opened the BBB in vitro and ex vivo. Oral treatment of APPswe/PS1dE9 (APP/PS1) mice, a familial model of AD, with EGCG/AA NPs resulted in a marked increase in synapses, as judged by synaptophysin (SYP) expression, and reduction of neuroinflammation as well as amyloid β (Aβ) plaque burden and cortical levels of soluble and insoluble Aβ(1-42) peptide. These morphological changes were accompanied by significantly enhanced spatial learning and memory. Mechanistically, we propose that stabilisation of EGCG in NPs complexes and a destabilized BBB led to higher therapeutic EGCG concentrations in the brain. Thus EGCG/AA NPs have the potential to be developed as a safe and strategy for the treatment of AD.

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Authors
Cano, A., Ettcheto, M., Chang, J.-H., Barroso, E., Espina, M., Kühne, B. A., Barenys, M., Auladell, C., Folch, J., Souto, E. B., Camins, A., Turowski, P., & García, M. L.
Affiliations
  • Biomedical Research Networking Center on Neurodegenerative Diseases (ES)
  • University College London (GB)
  • Hospital Sant Joan de Déu Barcelona (ES)
  • Institut de Nanociència i Nanotecnologia de la Universitat de Barcelona (ES)
  • Universitat de Barcelona (ES)
  • University of Coimbra (PT)
Corresponding author
  • Turowski, Patric
  • García, Maria Luisa
Venue
Journal of Controlled Release
Publisher
Elsevier BV
Published
2019-05
Volume
301
Pages
62-75
ISSN
0168-3659 (ISSN-L)
OpenAlex
W2920901214
Cited by
337
References
87
Citations by year
2026: 31 · 2025: 55 · 2024: 45 · 2023: 52 · 2022: 58 · 2021: 49 · 2020: 38 · 2019: 8
FWCI
26.22
Type
journal article
Language
en
Open access
Locations
  • Journal of Controlled Release (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Dipòsit Digital de la Universitat de Barcelona (Universitat de Barcelona) (submittedVersion, cc-by-nc-nd)
  • UCL Discovery (University College London) (submittedVersion)
Funders
  • British Heart Foundation (FS/16/26/32193)
  • Ministerio de Ciencia e Innovación (PI2016/01, SAF2017-84283-R, MAT 2014-59134-R, CB06/05/0024)
  • Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas
  • European Regional Development Fund
  • Generalitat de Catalunya (CVE-DOGC-B-14206020-2014)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Physical Sciences › Materials Science › Biomaterials › Nanoparticle-Based Drug Delivery
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Tea Polyphenols and Effects
Keywords
epigallocatechin gallate, vitamin C, Alzheimer's disease, APP/PS1 mice, blood-brain barrier disruption, tight junctions, oral bioavailability, brain accumulation, amyloid-beta, neuroinflammation, synaptophysin, spatial learning and memory, drug stability
MeSH terms
Polylactic Acid-Polyglycolic Acid Copolymer, Alzheimer Disease, Animals, Antioxidants, Ascorbic Acid, Brain, Catechin, Disease Models, Animal, Drug Carriers, Male, Mice, Inbred C57BL, Mice, Transgenic, Polyethylene Glycols, Amyloid beta-Peptides, Endothelial Cells, Rats, Nanoparticles, Drug Liberation

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