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Uptake of Aβ 1–40- and Aβ 1–42-coated yeast by microglial cells: a role for LRP
Abstract
Artificial diffuse and amyloid core of neuritic plaques [β-amyloid peptide (Aβ) deposits] could be prepared using heat-killed yeast particles opsonized with Aβ 1–40 or Aβ 1–42 peptides. Interaction and fate of these artificial deposits with microglial cells could be followed using a method of staining that allows discrimination of adherent and internalized, heat-killed yeast particles. Using this system, it was possible to show that nonfibrillar or fibrillar (f)Aβ peptides, formed in solution upon heating (aggregates), could not impair the internalization of heat-killed yeast particles opsonized with fAβ 1–40 or fAβ 1–42. This indicated that depending on their physical state, Aβ peptide(s) do not recognize the same receptors and probably do not follow the same internalization pathway. Using competitive ligands of class A scavenger receptors (SR-A) or low-density lipoprotein-related receptor protein (LRP), it has been shown that SR-A were not involved in the recognition of amyloid peptide deposits, whereas LRP specifically recognized deposits of fAβ 1–42 (but not fAβ 1–40) and mediated their phagocytosis.
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Microglial LRP1 mediates Aβ uptake and activation of microglia.
“Microglial LRP1 mediates Aβ uptake and activation of microglia (20–22).”
From LRPAP1 is released from activated microglia and inhibits microglial phagocytosis and amyloid beta aggregation (2023) · cites this paper as [22]
Microglial uptake of Aβ is partly mediated by LRP1.
“Microglial uptake of Aβ is known to be partly mediated by LRP1 (22)”
From LRPAP1 is released from activated microglia and inhibits microglial phagocytosis and amyloid beta aggregation (2023) · cites this paper as [22]
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Astrocytes Regulate Microglial Phagocytosis of Senile Plaque Cores of Alzheimer's Disease
DeWitt, D. A., Perry, G., Cohen, M., Doller, C., & Silver, J. (1998) · Experimental Neurology · doi:10.1006/exnr.1997.6738 · Cited by 261 · cited 1×
“It has been proved that cultured microglial cells can internalize small aggregates of fA [6, 9, 16–19]; injection of fA aggregates into the rat striatum lead to their phagocytosis by microglial cells [14]; and microglial cells from brains of patients with AD are stained with anti-A peptide antibodies [20–23].”
BackgroundMacrophage colony stimulating factor promotes phagocytosis by murine microglia
Mitrasinovic, O. M., Vincent, V. A. M., Simsek, D., & Murphy, G. M. (2003) · Neuroscience Letters · doi:10.1016/s0304-3940(03)00474-9 · Cited by 45
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Metadata
- Authors
- Laporte, V., Lombard, Y., Levy-Benezra, R., Tranchant, C., Poindron, P., & Warter, J.-M.
- Affiliations
- Laboratoire de Pathologie des Communications entre Cellules Nerveuses et Musculaires, EA 3429, Faculté de Pharmacie , Cedex, France
- Venue
- Journal of Leukocyte Biology
- Publisher
- Oxford University Press (OUP)
- Published
- 2004-05-10
- Volume
- 76
- Issue
- 2
- Pages
- 451-461
- ISSN
- 0741-5400
- 1938-3673
- Cited by
- 27
- References
- 8
- Language
- en
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