Abstract
The effect of guanidine derivatives on citrate content and activity of aconitate hydratase and citrate synthase have been investigated in rats with cerebral ischemia-reperfusion. Administration of N-[imino(1-piperidinyl)methyl]guanidine and N-[imino(4-morpholinyl)methyl]guanidine resulted in changes of specific activities of aconitase and citrate synthase towards control values. Under these conditions the citrate level considerably decreased versus rats with untreated ishemia-reperfusion. Administration of these biguanidines compounds also decreased the degree of DNA fragmentation, which was markedly increased in rats with ischemia-reperfusion. The dose-dependent effects of guanidine derivatives suggest that they exhibit not only antioxidant but also prooxidant effects.
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