Journal
FRONTIERS IN AGING NEUROSCIENCE
Volume 14, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fnagi.2022.815347
Keywords
neurodegenerative diseases; neuroinflammation; Alzheimer's disease; Parkinson's disease; microglia polarization
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Funding
- National Natural Science Foundation of China [81974270]
- Shanghai Pujiang Program [2019PJD032]
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Microglia-mediated neuroinflammation is a common feature of neurodegenerative diseases, and microglia can be categorized into M1 and M2 types with opposite functions. Modulating microglia M1/M2 polarization shows promising therapeutic potential in neurodegenerative diseases.
Microglia-mediated neuroinflammation is a common feature of neurodegenerative diseases such as Alzheimer's disease (AD), Parkinson's disease (PD), amyotrophic lateral sclerosis (ALS), and multiple sclerosis (MS). Microglia can be categorized into two opposite types: classical (M1) or alternative (M2), though there's a continuum of different intermediate phenotypes between M1 and M2, and microglia can transit from one phenotype to another. M1 microglia release inflammatory mediators and induce inflammation and neurotoxicity, while M2 microglia release anti-inflammatory mediators and induce anti-inflammatory and neuroprotectivity. Microglia-mediated neuroinflammation is considered as a double-edged sword, performing both harmful and helpful effects in neurodegenerative diseases. Previous studies showed that balancing microglia M1/M2 polarization had a promising therapeutic prospect in neurodegenerative diseases. We suggest that shifting microglia from M1 to M2 may be significant and we focus on the modulation of microglia polarization from M1 to M2, especially by important signal pathways, in neurodegenerative diseases.
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