Summary
To examine the relationship between the free radicals and brain tissue damage, we investigated the intensity of brain hydroxyl (OH) radical generation and lipid peroxidation in the rat contusion injury model. A unilateral contusion was induced by a weight-drop method. All rats were decapitated six hours after the injury, and brain samples were taken from three portions (core, peripheral, and distal) to examine the specific gravity as an indicator of brain edema, generation of OH using an electron paramagnetic resonance spectrometer (EPR), and malondialdehyde (MDA) and 4-hydroxyalkenals production. Analysis of the specific gravity revealed cerebral edema on the ipsilateral side in the injured group. The signal intensity of EPR in the core and peripheral portions in the contusion group was significantly higher than that in the distal portion of the contusion group and that of all portions in the control animals.
No significant difference was observed between the core and peripheral portions of the contusion group. The MDA and 4-hydroxyalkenals production was significantly higher in the core and peripheral portions than in the distal portion of the contusion group and that of all portions of the control group.
The degree of posttraumatic brain edema was closely correlated with the increase of DMPO-OH adduct, MDA, and 4-hydroxyalkenals. These results support the current concept that free radical production following traumatic brain injury may induce lipid peroxidation and may be the direct cause of edema formation.
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© 1997 Springer-Verlag
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Nishio, S., Yunoki, M., Noguchi, Y., Kawauchi, M., Asari, S., Ohmoto, T. (1997). Detection of Lipid Peroxidation and Hydroxyl Radicals in Brain Contusion of Rats. In: James, H.E., et al. Brain Edema X. Acta Neurochirurgica Supplements, vol 70. Springer, Vienna. https://doi.org/10.1007/978-3-7091-6837-0_26
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DOI: https://doi.org/10.1007/978-3-7091-6837-0_26
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