Apolipoprotein E and Immune Response in Astrocytes
Author Information
Author(s): Izumi Maezawa, Nobuyo Maeda, Thomas J. Montine, Kathleen S. Montine
Primary Institution: University of Washington, Seattle, WA, USA; University of North Carolina, Chapel Hill, NC, USA
Hypothesis
ApoE isoforms may act by modulating glial innate immune response and thereby altering neurotoxicity.
Conclusion
LPS activation of innate immune response in TR APOE glia results in opposing outcomes from microglia and astrocytes due to TR APOE-dependent signaling.
Supporting Evidence
- ApoE isoform-specific differences in cytokine secretion were observed in astrocytes after LPS exposure.
- TR APOE2 astrocytes showed the greatest cytokine secretion in response to LPS.
- NF-κB activity was significantly increased in all TR APOE astrocytes following LPS exposure.
Takeaway
This study found that different versions of a protein called ApoE affect how brain cells respond to immune signals, which can change how harmful they are to neurons.
Methodology
Primary cultures of TR APOE2, TR APOE3, and TR APOE4 astrocytes were stimulated with lipopolysaccharide (LPS) to measure cytokine production and NF-κB activity.
Participant Demographics
Homozygous targeted replacement mice for APOE2, APOE3, and APOE4.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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