Human astrocytes and microglia show augmented ingestion of synapses in Alzheimer's disease via MFG-E8.
Cell Rep Med
; 4(9): 101175, 2023 09 19.
Article
en En
| MEDLINE
| ID: mdl-37652017
Synapse loss correlates with cognitive decline in Alzheimer's disease (AD). Data from mouse models suggests microglia are important for synapse degeneration, but direct human evidence for any glial involvement in synapse removal in human AD remains to be established. Here we observe astrocytes and microglia from human brains contain greater amounts of synaptic protein in AD compared with non-disease controls, and that proximity to amyloid-ß plaques and the APOE4 risk gene exacerbate this effect. In culture, mouse and human astrocytes and primary mouse and human microglia phagocytose AD patient-derived synapses more than synapses from controls. Inhibiting interactions of MFG-E8 rescues the elevated engulfment of AD synapses by astrocytes and microglia without affecting control synapse uptake. Thus, AD promotes increased synapse ingestion by human glial cells at least in part via an MFG-E8 opsonophagocytic mechanism with potential for targeted therapeutic manipulation.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Microglía
/
Enfermedad de Alzheimer
Límite:
Animals
/
Humans
Idioma:
En
Revista:
Cell Rep Med
Año:
2023
Tipo del documento:
Article
Pais de publicación:
Estados Unidos