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The effect of hyperbaric oxygen on regional brain and spinal cord levels of nitric oxide metabolites in rat.

Abstract
Hyperbaric oxygen (HBO(2)) therapy is reported to be beneficial in transient brain ischemia. The present study was conducted to determine the influence of HBO(2) on metabolites of nitric oxide (NO) in brain and spinal cord of rats. Rats were exposed to room air (RA), normobaric air (NBA), normobaric oxygen (NBO(2)), hyperbaric air (HBA) or HBO(2), the last two conditions at 2.5ATA (atmosphere absolute) for 60 min. The results demonstrate that, compared to the NBA control, oxygen alone generally reduced tissue levels of NO(x)(-) (nitrite plus nitrate). On the other hand, 2.5ATA alone tended to have a slight, if any, effect on tissue levels of NO(x)(-). The combination of oxygen and pressure (i.e., HBO(2)) generally led to an increase in tissue levels of NO(x)(-). Based on these findings, it is concluded that HBO(2) appears to markedly increase NO function most notably in the corpus striatum, brainstem, cerebellum and spinal cord.
AuthorsYusuke Ohgami, Eunhee Chung, Donald Y Shirachi, Raymond M Quock
JournalBrain research bulletin (Brain Res Bull) Vol. 75 Issue 5 Pg. 668-73 (Mar 28 2008) ISSN: 0361-9230 [Print] United States
PMID18355644 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
Chemical References
  • Nitrates
  • Nitrites
  • Nitric Oxide
  • Oxygen
Topics
  • Analysis of Variance
  • Animals
  • Brain (anatomy & histology, metabolism)
  • Chromatography, High Pressure Liquid (methods)
  • Hyperbaric Oxygenation (methods)
  • Male
  • Nitrates (metabolism)
  • Nitric Oxide (metabolism)
  • Nitrites (metabolism)
  • Oxygen (metabolism)
  • Rats
  • Rats, Sprague-Dawley
  • Spinal Cord (metabolism)

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