Astrocyte Changes During Ischemia
Author Information
Author(s): Meng Fei, Cui Jing, Wang Peng, Wang Junhui, Sun Jing, Li Liang
Primary Institution: Capital Medical University
Hypothesis
The specific subtype change of astrocytes and the mechanisms of chronic brain ischemia are still unknown.
Conclusion
Chronic cerebral ischemia conditions promote the transformation of astrocytes into the neuroprotective A2 type instead of the neurotoxic A1 type.
Supporting Evidence
- Astrocytes in BCAO rats transformed into the A2 phenotype after four weeks.
- S100a10 was significantly up-regulated in the BCAO rat cortex.
- CX43 protein expression was significantly down-regulated after chronic ischemia.
- In vitro models showed similar astrocyte transformations under hypoxic conditions.
- Phosphorylation of CX43 was negatively regulated by ERK and JNK signaling pathways.
Takeaway
When the brain doesn't get enough blood, certain brain cells called astrocytes can change to help protect the brain instead of causing harm.
Methodology
A rat bilateral common carotid artery occlusion model was used to study astrocyte phenotype changes during chronic cerebral hypoperfusion.
Participant Demographics
Male Sprague Dawley rats, 8 weeks old.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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