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- W3000061011 abstract "Microglia become progressively activated and seemingly dysfunctional with age, and genetic studies have linked these cells to the pathogenesis of a growing number of neurodegenerative diseases. Here we report a striking buildup of lipid droplets in microglia with aging in mouse and human brains. These cells, which we call ‘lipid-droplet-accumulating microglia’ (LDAM), are defective in phagocytosis, produce high levels of reactive oxygen species and secrete proinflammatory cytokines. RNA-sequencing analysis of LDAM revealed a transcriptional profile driven by innate inflammation that is distinct from previously reported microglial states. An unbiased CRISPR–Cas9 screen identified genetic modifiers of lipid droplet formation; surprisingly, variants of several of these genes, including progranulin (GRN), are causes of autosomal-dominant forms of human neurodegenerative diseases. We therefore propose that LDAM contribute to age-related and genetic forms of neurodegeneration. Microglia in the aging hippocampus accumulate lipid droplets, and are functionally impaired and inflamed. Lipid droplet formation in microglia is regulated by genes linked to neurodegeneration such as progranulin." @default.
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- W3000061011 date "2020-01-20" @default.
- W3000061011 modified "2023-10-18" @default.
- W3000061011 title "Lipid-droplet-accumulating microglia represent a dysfunctional and proinflammatory state in the aging brain" @default.
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- W3000061011 doi "https://doi.org/10.1038/s41593-019-0566-1" @default.
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