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Related Experiment Videos

Nitric oxide in the gut

A L Salzman1

  • 1Division of Critical Care, Children's Hospital Medical Center, Cincinnati, OH 45229, USA.

New Horizons (Baltimore, Md.)
|May 1, 1995
PubMed
Summary

Nitric oxide (NO) is crucial for gastrointestinal function, regulating blood flow, motility, and barrier integrity. While protective, excessive NO can damage the gut, suggesting targeted inhibition may be therapeutic.

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Area of Science:

  • Gastroenterology
  • Physiology
  • Immunology

Background:

  • Nitric oxide (NO) is a key signaling molecule in the gastrointestinal tract.
  • Its production involves various gut cells and inflammatory responses.
  • NO regulates mucosal perfusion, motility, and barrier function.

Purpose of the Study:

  • To review the multifaceted roles of nitric oxide in gastrointestinal physiology.
  • To explore NO's involvement in critical illness and inflammatory conditions.
  • To discuss the therapeutic potential of modulating NO synthesis.

Main Methods:

  • Literature review of nitric oxide's functions in the gut.
  • Analysis of NO sources and signaling pathways.
  • Examination of NO's impact on gastrointestinal functions and pathologies.

Main Results:

  • NO regulates resting mucosal perfusion and enteric neurotransmission.
  • Inflammatory stimuli induce excessive NO production, potentially causing hyperemia and ileus.
  • NO protects the mucosa by maintaining perfusion and inhibiting neutrophil adhesion.
  • Excessive NO can directly injure the mucosa by disrupting cellular structures and barrier function.

Conclusions:

  • Nitric oxide has dual roles in the gastrointestinal tract: protective and potentially damaging.
  • Modulating NO production, particularly inhibiting the inducible isoform, may offer therapeutic benefits.
  • Selective inhibition of inducible nitric oxide synthase warrants further investigation.

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