The Major Risk Factors for Alzheimer's Disease: Age, Sex, and Genes Modulate the Microglia Response to Aβ Plaques.

Authors :: Sala Frigerio C
Wolfs L
Fattorelli N
Thrupp N
Voytyuk I
Schmidt I
Mancuso R
Chen WT
Woodbury ME
Srivastava G
Möller T
Hudry E
Das S
Saido T
Karran E
Hyman B
Perry VH
Fiers M
De Strooper B
Source :: Cell reports [Cell Rep] 2019 Apr 23; Vol. 27 (4), pp. 1293-1306.e6.
Publication Year :: 2019
Abstract: Gene expression profiles of more than 10,000 individual microglial cells isolated from cortex and hippocampus of male and female App <superscript>NL-G-F</superscript> mice over time demonstrate that progressive amyloid-β accumulation accelerates two main activated microglia states that are also present during normal aging. Activated response microglia (ARMs) are composed of specialized subgroups overexpressing MHC type II and putative tissue repair genes (Dkk2, Gpnmb, and Spp1) and are strongly enriched with Alzheimer's disease (AD) risk genes. Microglia from female mice progress faster in this activation trajectory. Similar activated states are also found in a second AD model and in human brain. Apoe, the major genetic risk factor for AD, regulates the ARMs but not the interferon response microglia (IRMs). Thus, the ARMs response is the converging point for aging, sex, and genetic AD risk factors.<br /> (Copyright © 2019 The Authors. Published by Elsevier Inc. All rights reserved.)

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