Effect of hyperbaric oxygenation on the Na+, K+-ATPase and membrane fluidity of cerebrocortical membranes after experimental subarachnoid hemorrhage

Katsumi Yufu, Takehiko Itoh, Rei Edamatsu, Akitane Mori, Masahisa Hirakawa

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)


It is reported that CNS hemorrage causes membrane dysfunction and may exacerbate this damage as a result of secondary ischemia or hypoxia. Since hyperbaric oxygenation improves oxygen metabolism, it may reduce this membrane damage. The present study was conducted to reveal whether hyperbaric oxygenation influences membrane alteration after hemorrhage. Thirty minutes after subarachnoid hemorrhage induction, rats were treated with hyperbaric oxygenation 2 ATA for 1 hour. Rats were decapitated 2 hours after subarachnoid hemorrhage induction. Na+, K+-ATPase activity measurement, and spin-label studies were performed on crude synpatosomal membranes. Subarachnoid hemorrhage decreased Na+, K+-ATPase activity. Spin label studies showed that hydrophobic portions of near the membrane surface became more rigid and the mobility of the membrane protein labeled sulfhydryl groups decreased after subarachnoid hemorrhage. Hyperbaric oxygenation significantly ameliorated most of the subarachnoid hemorrhage induced alterations. We conclude that hyperbaric oxygenation may be a beneficial treatment for acute subarachnoid hemorrhage.

Original languageEnglish
Pages (from-to)1033-1039
Number of pages7
JournalNeurochemical Research
Issue number9
Publication statusPublished - Sep 1 1993


  • Hyperbaric oxygenation
  • Na, K-ATPase
  • membrane fluidity
  • subarachnoid hemorrhage

ASJC Scopus subject areas

  • Biochemistry
  • Cellular and Molecular Neuroscience


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