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Nitric oxide and cerebral ischemic preconditioning.

Paul L Huang1

  • 1Harvard Medical School, Cardiology Division and Cardiovascular Research Center, Massachusetts General Hospital, 149 Thirteenth Street, Charlestown, MA 02129, USA. phuang1@partners.org

Cell Calcium
|July 21, 2004
PubMed
Summary

Nitric oxide (NO) regulates brain blood flow and metabolism. This review explores NO's complex roles, both protective and toxic, following cerebral ischemia and its potential in preconditioning.

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Area of Science:

  • Neuroscience
  • Cardiovascular Science
  • Biochemistry

Background:

  • Nitric oxide (NO) is a key regulator of cerebral blood flow and metabolism.
  • NO acts as a vasodilator, coupling brain perfusion with metabolic demands.
  • Following cerebral ischemia, NO levels increase due to NMDA receptor activation and calcium influx.

Purpose of the Study:

  • To review the multifaceted effects of nitric oxide (NO) after cerebral ischemia.
  • To elucidate the signaling pathways modulated by NO in the ischemic brain.
  • To examine the potential role of NO in cerebral ischemic preconditioning.

Main Methods:

  • Literature review of studies on nitric oxide and cerebral ischemia.
  • Analysis of signaling pathways involving NO, NMDA receptors, and calcium.

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  • Evaluation of evidence for NO's protective or toxic effects.

    • Main Results:

    • Nitric oxide (NO) exhibits dual roles, being potentially protective or detrimental following cerebral ischemia.
    • NO signaling pathways are activated by NMDA receptor-mediated calcium entry post-ischemia.
    • The source and enzymatic origin of NO influence its impact on ischemic brain tissue.

    Conclusions:

    • Nitric oxide (NO) plays a complex role in the response to cerebral ischemia.
    • Understanding NO's signaling is crucial for developing therapeutic strategies.
    • NO may be a target for enhancing cerebral ischemic preconditioning.