Inflammatory factors and amyloid β-induced microglial polarization promote inflammatory crosstalk with astrocytes

Nov 16, 2020Aging

Inflammation and amyloid beta cause immune cells in the brain to trigger inflammation with support cells

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Abstract

M1 microglial medium increased astrocyte production of pro-inflammatory factors, while M2 microglial medium enhanced anti-inflammatory factors.

  • Microglial polarization may alter immune interactions between microglia and astrocytes in Alzheimer's disease.
  • M1 microglia are associated with the secretion of pro-inflammatory factors such as interleukin-1β, tumor necrosis factor α, and interleukin-6.
  • M2 microglia are linked to the production of anti-inflammatory factors including interleukin-4 and interleukin-10.
  • Exposure to amyloid-β alone or with inflammatory substances may induce pro-inflammatory activity in both M1 microglia and astrocytes.
  • Nuclear factor κB p65 was upregulated in pro-inflammatory microglia and astrocytes, suggesting a role in inflammation.
  • Stat6 was upregulated in M2 microglia and anti-inflammatory astrocytes, indicating a potential mechanism for regulating inflammation.

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