The 21-aminosteroid antioxidant tirilazad mesylate, U-74006F, blocks cortical hypoperfusion following spreading depression

Edward D. Hall, Sarah L. Smith

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

Cortical spreading depression (SD) has been implicated in the pathophysiology of classical migraine headache and cerebral ischemia. A reduction in cerebral blood flow (CBF), mimicking that seen during the aura and headache phase of migraine, is typically observed following SD in the rat. This phenomenon may also play a role in potentiating ischemic brain damage. In the present study, brief cortical exposure to 1 M KCl produced a marked suppression of EEG amplitude which persisted 20 min in the rat. Upon normalization of the EEG, cortical blood flow declined 20-30% and remained low for at least 2 h. Treatment with a 1 mg/kg i.v. dose of the 21-aminosteroid antioxidant trilazad mesylate (U-74006F), 2 min following KCl application, completely blocked the hypoperfusion while leaving the magnitude and duration of the EEG suppression and mean arterial pressure unchanged. Tirilazad mesylate is a potent inhibitor of oxygen radical-mediated lipid peroxidation both in vitro and in vivo. Thus, based on present results, an oxygen radical hypothesis is proposed to account for the SD-induced cerebral hypoperfusion.

Original languageEnglish
Pages (from-to)243-248
Number of pages6
JournalBrain Research
Volume553
Issue number2
DOIs
StatePublished - Jul 12 1991

Keywords

  • Cerebral hypoperfusion
  • Cerebral ischemia
  • Classical migraine headache
  • Cortical spreading depression
  • Free radical
  • Tirilazad mesylate

ASJC Scopus subject areas

  • General Neuroscience
  • Molecular Biology
  • Clinical Neurology
  • Developmental Biology

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