Effects of Antioxidants Streptozotocin-Induced Clastogenesis in Mammalian and Insect Cells

ALEJANDRO DANIEL BOLZAN; NÉSTOR O. BIANCHI; MARTHA S. BIANCHI

MUTATION RESEARCH. GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS

ELSEVIER SCIENCE BV

Año: 1998 vol. 418 p. 35 - 42

1383-5718

The effects of the antioxidant enzymes superoxide dismutase (SOD), catalase (CAT) and the hydroxyl radical scavenger mannitol (MAN) on the clastogenesis induced by STZ in Chinese hamster ovary (CHO) and mosquito cells were investigated. The addition of liposome-entrapped SOD, CAT and MAN to both cell lines caused a significant decrease in the yield of STZ-induced chromosome aberrations (p<0.05). However, the inhibitory effect was more evident in CHO (40.6–67.5%) than in mosquito (15.2–53.6%) cells. These findings indicate that the chromosome damage induced by STZ can be partially inhibited through the incorporation of antioxidant compounds into the cells and suggest that free radicals are involved in the clastogenesis by STZ.