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Related Experiment Videos

The stress gene response in brain

S M Massa1, R A Swanson, F R Sharp

  • 1Department of Neurology, University of California at San Francisco, USA.

Cerebrovascular and Brain Metabolism Reviews
|January 1, 1996
PubMed
Summary

Brain stress gene expression changes during injury, like ischemia, can signal cell damage or offer protection. However, neuronal heat shock protein 70 (hsp70) is unlikely to be key for ischemic tolerance.

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Cellular Stress Response

Background:

  • Adverse brain conditions, such as ischemia and excitotoxin exposure, trigger gene expression changes.
  • These changes may represent injury processes or adaptive, protective responses to subsequent stress.

Purpose of the Study:

  • To review the regulation, function, and relevance to ischemia pathophysiology of major stress-induced genes.
  • To examine gene expression patterns in various brain injury models and discuss in vitro studies and ischemic tolerance.

Main Methods:

  • Review of literature on stress-induced genes including heat shock proteins (HSPs), glucose-regulated proteins, glucose transporters, and ubiquitin.
  • Analysis of gene expression patterns in models of focal/global ischemia, excitotoxin/seizure injury, and hyperthermia.
  • Discussion of in vitro expression studies and the phenomenon of ischemic tolerance.

Main Results:

  • Stress gene expression serves as a marker for cellular injury in the brain.
  • A disconnect between mRNA and protein expression may indicate impending cell death after an initial insult.
  • Neuronal heat shock protein 70 (hsp70) expression is unlikely to be a major factor in developing ischemic tolerance.

Conclusions:

  • Stress-induced gene expression is a significant indicator of cellular injury and potential cell fate.
  • While other stress proteins may contribute, neuronal hsp70 does not appear to be a primary mechanism for ischemic tolerance.
  • Understanding these stress responses is crucial for comprehending brain injury pathophysiology and potential therapeutic targets.

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