Cited by 39Neuroinflammation and Neurodegeneration MechanismsAlzheimer's disease research and treatmentsPhagocytosis and Immune Regulation

Involvement of Wiskott-Aldrich Syndrome Protein Family Verprolin-Homologous Protein (WAVE) and Rac1 in the Phagocytosis of Amyloid-β(1 – 42) in Rat Microglia

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Kitamura, Yoshihisa, Shibagaki, Keiichi, Takata, Kazuyuki, Tsuchiya, Daiju, Taniguchi, Takashi, Gebicke-Haerter, Peter J., Miki, Hiroaki, Takenawa, Tadaomi +1 more·2003·Journal of Pharmacological Sciences

Abstract

Alzheimer's disease (AD) is characterized by the accumulation of extracellular amyloid-beta (A beta) fibrils with microglia. Recently, there has been great interest in the microglial phagocytosis of A beta, because the microglial pathway is considered to be one of the A beta clearance pathways in the brain parenchyma. However, the mechanism of microglial phagocytosis of A beta is not fully understood and, thus, was investigated in this study. At one minute after exposure to A beta(1-42) (A beta 42), A beta immunoreactivity was detected at the cell surface of microglia. After 1 h, marked immunoreactivity was observed in the cytosolic vesicles. At 12 h, delayed phagocytosis of fibrillar A beta 42 was also observed with the formation of a large phagocytic cup. The microglial cell shape rapidly changed to an ameboid form during the process of phagocytosis. Although neither neural Wiskott-Aldrich syndrome protein (N-WASP) nor WASP interacting SH3 protein (WISH) immunoreactivity was co-localized with filamentous actin (F-actin) distribution, both WASP family verprolin-homologous protein (WAVE) and Rac1 immunoreactivity was co-localized with F-actin in the lamellipodia of phogocytic microglia. These results suggest that WAVE and Rac1 participate in the phagocytosis of A beta 42 by microglia.

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Research works printed but not linked: 2

  1. Kettenmann H, Ransom BR, editors. Neuroglia. New York and Oxford: Oxford University Press; 1995.
  2. Kaneko I, Tutumi S. Matters arising: conformations of b - amyloid in solution. J Neurochem. 1997;68:438-439.

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Authors
Kitamura, Y., Shibagaki, K., Takata, K., Tsuchiya, D., Taniguchi, T., Gebicke-Haerter, P. J., Miki, H., Takenawa, T., & Shimohama, S.
Affiliations
  • Kyoto Pharmaceutical University (JP)
  • Institute of Medical Science, The University of Tokyo (JP)
  • Kyoto University (JP)
Venue
Journal of Pharmacological Sciences
Published
2003
Volume
92
Issue
2
Pages
115-123
ISSN
  • 1347-8613 (ISSN-L)
  • 1347-8648
OpenAlex
W2022986204
Cited by
39
References
36
Citations by year
2026: 1 · 2025: 1 · 2024: 1 · 2023: 2 · 2021: 3 · 2020: 4 · 2019: 1 · 2018: 2 · 2017: 2 · 2015: 2 · 2014: 2 · 2013: 3 · 2012: 2
FWCI
1.40
Type
journal article
Language
en
Open access
Licence
public-domain
Locations
  • Journal of Pharmacological Sciences (publishedVersion, public-domain)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
Promotion and Mutual Aid Corporation for Private Schools of Japan
Topics
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Immunology and Microbiology › Immunology › Phagocytosis and Immune Regulation
Keywords
amyloid-beta 42, microglial phagocytosis, waves, Rac1, Alzheimer's disease, actin cytoskeleton, lamellipodia, N-WASP, wishes, phagocytic cup
MeSH terms
Animals, Cells, Cultured, Microfilament Proteins, Peptide Fragments, Phagocytosis, Wiskott-Aldrich Syndrome, Cytochalasin D, Amyloid beta-Peptides, Rats, Wistar, Microglia, rac1 GTP-Binding Protein, Saccharomyces cerevisiae Proteins, Wiskott-Aldrich Syndrome Protein Family, Rats

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