Journal
MOLECULAR NEUROBIOLOGY
Volume 54, Issue 10, Pages 8071-8089Publisher
SPRINGER
DOI: 10.1007/s12035-016-0297-1
Keywords
Neuroinflammation; Immune response in the CNS; Microglia activation; Cytokines; miRNA; Neurodegeneration
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Inflammatory reactions could be both beneficial and detrimental to the brain, depending on strengths of their activation in various stages of neurodegeneration. Mild activation of microglia and astrocytes usually reveals neuroprotective effects and ameliorates early symptoms of neurodegeneration; for instance, released cytokines help maintain synaptic plasticity and modulate neuronal excitability, and stimulated toll-like receptors (TLRs) promote neurogenesis and neurite outgrowth. However, strong activation of glial cells gives rise to cytokine overexpression/dysregulation, which accelerates neurodegeneration. Altered mutual regulation of p53 protein, a major tumor suppressor, and NF-kappa B, the major regulator of inflammation, seems to be crucial for the shift from beneficial to detrimental effects of neuroinflammatory reactions in neurodegeneration. Therapeutic intervention in the p53-NF-kappa B axis and modulation of TLR activity are future challenges to cope with neurodegeneration.
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