Brain injury, edema, and vascular permeability changes induced by oxygen-derived free radicals.

Abstract:

:We studied the cerebral effects of oxygen-derived free radicals generated from the xanthine oxidase/hypoxanthine/ADP-Fe3+ system. Xanthine oxidase/hypoxanthine/ADP-Fe3+ solution (0.1 ml) was infused into caudate putamen, and brain was frozen rapidly in situ. Brain water and sodium content increased concomitant with decreased potassium content at 24 hours and 48 hours after the infusion. The degree of brain edema and injury depended on the dose of xanthine oxidase. Spongy neuropil and neuronal cytoplasmic vacuoles were seen at 2 hours, with an infiltration by polymorphonuclear leukocytes at 24 hours, followed by lipid-laden macrophages and reactive astrocytes. Leakage of fluorescent dye into neuropil was seen at 2 hours, but not later. These data suggest that oxygen-derived free radicals damage endothelial cells of the blood-brain barrier; the brain injury is characterized by edema and by structural damage of neurons and glia.

journal_name

Neurology

journal_title

Neurology

authors

Chan PH,Schmidley JW,Fishman RA,Longar SM

doi

10.1212/wnl.34.3.315

subject

Has Abstract

pub_date

1984-03-01 00:00:00

pages

315-20

issue

3

eissn

0028-3878

issn

1526-632X

journal_volume

34

pub_type

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