期刊
CELL METABOLISM
卷 30, 期 3, 页码 493-+出版社
CELL PRESS
DOI: 10.1016/j.cmet.2019.06.005
关键词
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资金
- Korea National Research Foundation [NRF-2014M3C7A1046047, 2018R1A2A1A19019062, 2015M3C7A1028790, 2018R1A5A2025964]
- National Research Foundation of Korea [2018R1A2A1A19019062, 2015M3C7A1028790, 2018R1A5A2025964] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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-beta triggers acute microglial inflammation accompanied by metabolic reprogramming from oxidative phosphorylation to glycolysis. It was dependent on the mTOR-HIF-1 alpha 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-gamma 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.
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