Abstract
Malondialdehyde (MDA) is a product of lipid peroxidation (LPO). In combination with CuCl 2 MDA induced single strand breaks in PM2 DNA whereas MDA or CuCl 2 alone had no effect. Cu(II) oxidized MDA by a radical mechanism under formation of Cu(I). DNA strand break induction was inhibited by catalase (98%), neocuproine (76%) and DMSO (61%). The synergistic damaging effect of MDA and Cu(II) was also demonstrated in human fibroblasts measured by alkaline elution. The combination MDA/CuCl 2 caused extensive DNA breakage while neither MDA nor CuCl 2 alone induced DNA damage within the cell. Synergistic cytotoxic effects were observed 18 h after a simultaneous treatment of the cells with MDA and CuCl 2 for 1 h.
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