Abstract

Oxygen free radicals are generated during methanol-induced liver injury, as was shown for ethanol. The effect of methanol intoxication (6 g kg−1 body wt.) on protein modification in the liver of rats was investigated. Electron spin resonance determination indicated an increase in the free radical signal 6 and 12 h after intoxication. After 7 days of treatment, the contents of malondialdehyde and carbonyl groups in proteins were significantly increased. The level of amino groups and sulphydryl groups and the amount of tryptophan in proteins were decreased, whereas the amount of bi-tyrosine was increased significantly. Changes in protein structure resulted both from free radical action and formaldehyde generation during methanol intoxication. Copyright © 2000 John Wiley & Sons, Ltd.

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