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Gene expression in astrocytes during and after ischemia
1Department of Pathology, Stanford University School of Medicine, CA 94305, USA.
Progress in Brain Research
|January 1, 1995
Summary
Early response genes, like c-fos, are rapidly and transiently induced by ischemia in the brain. This gene activation is implicated in cellular changes following brain injury and ischemia.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- Immediate early genes (IEGs) are crucial for cellular responses to stimuli.
- IEGs, including fos and jun families, encode transcription factors that regulate gene expression.
- IEG involvement in brain injury and ischemia is an active area of research.
Purpose of the Study:
- To investigate the role and temporal dynamics of c-fos induction in response to ischemia.
- To explore the potential downstream effects of c-fos activation on other genes in ischemic conditions.
Main Methods:
- Experimental induction of ischemia.
- Analysis of c-fos gene expression.
- Investigation of AP-1 DNA binding activity.
Main Results:
- Ischemia induced a rapid and transient upregulation of c-fos.
- Evidence suggests AP-1 binding activity may target genes like GFAP and vimentin.
- c-fos activation is linked to changes in heat shock proteins (hsp) and cytoskeleton proteins.
Conclusions:
- c-fos is rapidly induced by ischemia, suggesting a key role in the early cellular response to brain injury.
- The AP-1 transcription factor complex, regulated by c-fos, likely plays a role in modulating gene expression related to cellular stress and structural changes.