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Related Experiment Videos

White matter ischaemia.

M A Petty1, J G Wettstein

  • 1CNS Research, Hoechst Marion Roussel, Bridgewater, NJ 08807, USA. margaret.perry@hmrag.com

Brain Research. Brain Research Reviews
|December 28, 1999
PubMed
Summary

Brain and spinal cord white matter damage from ischemia involves a cascade leading to irreversible axonal injury. Targeting specific points in this cascade may prevent such damage.

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Area of Science:

  • Neuroscience
  • Cellular Biology
  • Ischemia Research

Background:

  • Brain and spinal cord white matter are susceptible to ischemic damage.
  • Ischemia triggers a cascade of cellular events, including ion fluxes and excitotoxicity.
  • This cascade culminates in intracellular calcium overload and irreversible axonal injury.

Purpose of the Study:

  • To investigate the molecular mechanisms underlying white matter damage during ischemia.
  • To identify potential therapeutic targets within the ischemic cascade.
  • To explore strategies for preventing irreversible axonal injury in white matter.

Main Methods:

  • Analysis of cellular events following energy supply reduction in white matter.
  • Examination of ion transport mechanisms, including Na(+)/Ca(2+) exchanger activity.
  • Investigation of calcium homeostasis disruption.

Main Results:

  • Ischemia induces depolarization and Na(+) influx.
  • Reverse operation of the Na(+)/Ca(2+) exchanger contributes to Ca(2+) overload.
  • Intracellular Ca(2+) overload is a key factor in irreversible axonal injury.

Conclusions:

  • The white matter damage cascade during ischemia presents multiple targets for therapeutic intervention.
  • Inhibiting specific steps, such as Na(+)/Ca(2+) exchanger dysfunction, could prevent axonal injury.
  • Targeted interventions may offer a novel approach to treating ischemic white matter damage.

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