Neuroglobin protects neurons against oxidative stress in global ischemia

Richard Changxun Li, Shang Zhi Guo, Seung Kwan Lee, David Gozal

Research output: Contribution to journalArticle

63 Citations (Scopus)

Abstract

Neuroglobin (Ngb) is a recently discovered globin that affords protection against hypoxic/ischemic-induced cell injury in brain. Hypoxic/ischemic injury is associated with accumulation of reactive oxygen species (ROS) and/or reactive nitrogen species (RNS). In previous studies, we found that Ngb has antioxidative properties, and protects PC-12 cells against hypoxia- and Β-amyloid-induced cell death. To further delineate the potential role of Ngb in protection against cerebral ischemia-reperfusion injury in vivo, we developed a transgenic mouse line that overexpresses Ngb. Hippocampal ischemia-reperfusion injury was induced by a 10-minute bilateral occlusion of the common carotid arteries, and the animal brains were assessed 3 days later. CA1 neural injury was determined by cresyl violet staining. Lipid peroxidation was assessed using a malonyldialdehyde assay kit, whereas ROS/RNS accumulation was determined by Het staining in the CA1 hippocampal region. Hippocampal Ngb mRNA and protein expressions were assessed by reverse transcriptase-PCR and western blotting, respectively. Neuroglobin was successfully overexpressed in the hippocampus of Ngb transgenic mice. After ischemia-reperfusion, CA1 ROS/RNS production and lipid peroxidation were markedly decreased in Ngb transgenic mice compared with wild-type mice. Furthermore, CA1 neuronal injury was also markedly reduced. Thus, Ngb may confer protection against ischemia-reperfusion injury in the brain through its intrinsic antioxidant properties.

Original languageEnglish
Pages (from-to)1874-1882
Number of pages9
JournalJournal of Cerebral Blood Flow and Metabolism
Volume30
Issue number11
DOIs
Publication statusPublished - 2010 Nov

Keywords

  • global ischemia
  • hippocampus
  • neuroglobin
  • neuron
  • oxidative stress
  • transgenic mouse

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology
  • Cardiology and Cardiovascular Medicine

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