Transient Formation of Superoxide Radicals in Polyunsaturated Fatty Acid-Induced Brain Swelling |
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| Authors: | Pak Hoo Chan Robert A Fishman |
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| Institution: | Brain Edema Clinical Research Center, Department of Neurology, University of California, School of Medicine, San Francisco, California 94143 |
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| Abstract: | The involvement of superoxide free radicals and lipid peroxidation in brain swelling induced by free fatty acids has been studied in brain slices and homogenates. The polyunsaturated fatty acids linoleic acid (18:2), linolenic acid (18:3), arachidonic acid (20:4), and docosahexaenoic acid (22:6) caused brain swelling concomitant with increases in superoxide and membrane lipid peroxidation. Palmitic acid (16:0) and oleic acid (18:1) had no such effect. Furthermore, superoxide formation was stimulated by NADPH and scavenged by the addition of exogenous superoxide dismutase in cortical slice homogenates. These in vitro data support the hypothesis that both superoxide radicals and lipid peroxidation are involved in the mechanism of polyunsaturated fatty acid-induced brain edema. |
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| Keywords: | Superoxide free radicals—Polyunsaturated fatty acids—Brain edema Chan P H and Fishman R A Transient formation of superoxide radicals in polyunsaturated fatty acid-induced brain swelling J Neurochem 35 1004–1007 (1980) |
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