作者
Anna Fracassi, Michela Marcatti, Batbayar Tumurbaatar, Randall Woltjer, Sandra Moreno, Giulio Taglialatela
发表日期
2023/1
期刊
Brain Pathology
卷号
33
期号
1
页码范围
e13108
简介
The existence of individuals who remain cognitively intact despite presenting histopathological signs of Alzheimer's disease (AD), here referred to as “Nondemented with AD neuropathology” (NDAN), suggests that some mechanisms are triggered to resist cognitive impairment. Exposed phosphatidylserine (ePS) represents a neuronal “eat‐me” signal involved in microglial‐mediated phagocytosis of damaged synapses. A possible mediator of this process is TREM2, a microglial surface receptor activated by ligands including PS. Based on TREM2 role in the scavenging function of microglia, we hypothesize that an efficient microglial phagocytosis of damaged synapses underlies synaptic resilience in NDAN, thus protecting from memory deficits. Using immunofluorescence microscopy, we performed a comparative study of human post‐mortem frontal cortices of aged‐matched, AD and NDAN individuals. We studied …
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