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Published on: May 24, 2017
Effects of Ukrain on the activities of DNA-nicking enzymes
I I Votrin1, I V Voltchek, S N Kurochkin
1Institute of Biological and Medical Chemistry, Russian Academy of Medical Sciences, Moscow, Russia.
Abstract:
We studied the effects of Ukrain, a novel antitumor drug, on the activities of calcium, magnesium-dependent endonuclease (CME) and manganese-dependent endonuclease (MnDE) in rat liver nuclei, the activity of topoisomerase I assessed by pUC19 plasmid relaxation and CME activity in the nuclei of lymphocytes from colon cancer patients. Ukrain was found to exert a dose-dependent inhibiting effect on both CME and MnDE, similar to that exerted by erythropoietin, which was used as a reference preparation. Both Ukrain and erythropoietin also caused dose-dependent inhibition of topoisomerase I activity. The influence of Ukrain on CME activity in the nuclei of the lymphocytes of colon cancer patients was differential, depending on treatment efficacy. The results suggest that DNA-nicking enzymes may be a target of Ukrain and may mediate its antitumor effects.
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