Pathogenesis of hypoxic-ischemic brain injury in a perinatal rodent model

Faye SilVerstein, Karen Buchanan, Michael V. Johnston

Research output: Contribution to journalArticlepeer-review

Abstract

Exposure of immature rats to 8% oxygen after unilateral carotid artery ligation (UCL) causes metabolic, neurochemical and histopathological changes in the ipsilateral forebrain that resemble those in human perinatal hypoxic-ischemic encephalopathy. Regional cerebral perfusion in this model was examined by visual analysis of India ink trapped in cerebral vessels and measurement of [14C]iodoantipyrine ([14C]IAP) and [3H]flunitrazepam extraction into the brain. UCL alone reduced [14C]IAP accumulation in the ipsilateral hemisphere by 20% and hypoxia superimposed on UCL progressively reduced ipsilateral hemisphere perfusion by 71% at 2 h. Hypoxia probably injures neurons in this model by causing a critical reduction in cerebral perfusion, an effect which also appears to be important in the human disorder.

Original languageEnglish (US)
Pages (from-to)271-277
Number of pages7
JournalNeuroscience Letters
Volume49
Issue number3
DOIs
StatePublished - Aug 31 1984
Externally publishedYes

Keywords

  • [C]iodoantipyrine
  • cerebral blood flow
  • hypoxia-ischemia
  • immature rat

ASJC Scopus subject areas

  • Neuroscience(all)

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