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Immunology of neurodegenerative diseases

Perivascular signals drive microglial appetite

Microglial synapse engulfment precedes brain amyloid plaque formation and probably contributes to early cognitive decline in Alzheimer’s disease. The mechanisms that regulate microglia-mediated synapse engulfment are unclear. De Schepper et al. show that perivascular SPP1 induces microglia-mediated synapse engulfment, highlighting a neuroimmune interaction that contributes to synapse loss in amyloid pathology.

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Fig. 1: SPP1 release from perivascular cells induces microglial phagocytosis of synapses at early stages of amyloid pathology in a mouse model of AD.

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Correspondence to F. Chris Bennett.

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O’Brien, C.A., Bennett, F.C. Perivascular signals drive microglial appetite. Nat Neurosci 26, 369–370 (2023). https://doi.org/10.1038/s41593-023-01256-0

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