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Related Experiment Videos

Ethanol can inhibit nitric oxide production.

M G Persson1, L E Gustafsson

  • 1Department of Physiology, Karolinska Institutet, Stockholm, Sweden.

European Journal of Pharmacology
|November 24, 1992
PubMed
Summary

Ethanol administration in rabbits was found to decrease endogenous nitric oxide (NO) levels in exhaled air. This study demonstrates ethanol

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Area of Science:

  • Biochemistry
  • Pharmacology
  • Physiology

Background:

  • Nitric oxide (NO) is a crucial endogenous signaling molecule.
  • Understanding factors affecting NO production is vital for physiological and pathological research.

Purpose of the Study:

  • To investigate the in vivo effect of ethanol on endogenous nitric oxide (NO) formation.
  • To determine if L-arginine can reverse ethanol-induced changes in NO levels.

Main Methods:

  • Monitoring endogenous nitric oxide (NO) in exhaled air of anesthetized rabbits using chemiluminescence.
  • Intravenous (i.v.) infusion of varying doses of ethanol (3-30 mmol kg-1).
  • Administration of L-arginine (1 g kg-1) to assess its effect on ethanol's impact.

Main Results:

  • Ethanol dose-dependently reduced exhaled nitric oxide (NO) levels.
  • The half-maximal inhibitory concentration (IC50) for ethanol's effect on NO was determined to be 23 +/- 3 mmol kg-1.
  • L-Arginine administration did not reverse the inhibitory effect of ethanol on NO production.

Conclusions:

  • Ethanol inhibits endogenous nitric oxide (NO) formation in vivo.
  • The mechanism of ethanol's effect on NO production does not appear to be mediated through the L-arginine pathway.
  • These findings highlight a novel pharmacological action of ethanol on the nitric oxide system.

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