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A Breakdown in Metabolic Reprogramming Causes Microglia Dysfunction in Alzheimer's Disease
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Abstract

Reactive microglia are a major pathological feature of Alzheimer's disease (AD). However, the exact role of microglia in AD pathogenesis is still unclear. Here, using metabolic profiling, we found that exposure to amyloid-β triggers acute microglial inflammation accompanied by metabolic reprogramming from oxidative phosphorylation to glycolysis. It was dependent on the mTOR-HIF-1α pathway. However, once activated, microglia reached a chronic tolerant phase as a result of broad defects in energy metabolisms and subsequently diminished immune responses, including cytokine secretion and phagocytosis. Using genome-wide RNA sequencing and multiphoton microscopy techniques, we further identified metabolically defective microglia in 5XFAD mice, an AD mouse model. Finally, we showed that metabolic boosting with recombinant interferon-γ treatment reversed the defective glycolytic metabolism and inflammatory functions of microglia, thereby mitigating the AD pathology of 5XFAD mice. Collectively, metabolic reprogramming is crucial for microglial functions in AD, and modulating metabolism might be a new therapeutic strategy for AD.

Keywords : Alzheimer's disease; microglia; aerobic glycolysis; OXPHOS; amyloid-β; mTOR; HIF-1α; IFN-γ

주소복사
논문정보   F1000선정
- 형식: Research article
- 게재일: 2019년 06월 (BRIC 등록일 2019-07-03)
- 연구진: 국내연구진태극기
- 분야: Cell_Biology, Medicine
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