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Oxidants, antioxidants and the ischemic brain
David S Warner1, Huaxin Sheng, Ines Batinić-Haberle
1Department of Anesthesiology, The Multidisciplinary Neuroprotection Laboratories, Duke University Medical Center, Durham, NC 27710, USA. warne002@mc.duke.edu
The Journal of Experimental Biology
|August 10, 2004
Summary
Brain oxidative stress from ischemia/reperfusion causes damage. Targeting multiple pathways is key for preventing and treating ischemic brain injury.
Area of Science:
- Neuroscience
- Biochemistry
- Pathology
Background:
- The brain is susceptible to oxidative stress during ischemia/reperfusion.
- Excitotoxic stimulation elevates superoxide and nitric oxide, producing damaging reactive species like peroxynitrite and hydroxyl radical.
Purpose of the Study:
- To explore the role of oxidative stress in ischemic brain injury.
- To identify new therapeutic targets for post-ischemic interventions.
Main Methods:
- Utilized transgenic mutants to study oxidative stress mechanisms.
- Employed selective pharmacological antioxidants to investigate their effects.
Main Results:
- Reactive oxygen/nitrogen species are critical in initiating apoptosis, mitochondrial permeability transition, and PARP activation.
- These processes contribute to cellular damage and death following ischemia.
Conclusions:
- Oxidative stress involves multiple post-ischemic cascades leading to neuronal death.
- Effective treatment for ischemic brain injury necessitates multi-target interventions.