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Lipid peroxidation as pathway of aluminium cytotoxicity in human skin fibroblast cultures: Prevention by superoxide dismutase+catalase and vitamins E and C

Laboratoire de Toxicologie et Hygie`ne Appliquée, U.F.R. des Sciences Pharmaceutiques, Université Victor Segalen, 146 rue Léo-Saignat, 33076 Bordeaux Cedex, France; Laboratory of Toxicology and Applied Hygiene Faculty of Pharmaceutical Sciences, University of Victor Segalen, 146 rue Léo-Saignat, 33076 Bordeaux Cedex, France

E E Creppy

Laboratory of Toxicology and Applied Hygiene Faculty of Pharmaceutical Sciences, University of Victor Segalen, 146 rue Léo-Saignat, 33076 Bordeaux Cedex, France

Lipid peroxidation is one of the main manifestations of oxidative damage and has been found to play an important role in the toxicity and carcinogenicity of many xenobiotics. In the present study, we investigated the possible induction of lipid peroxidation by aluminium in human foreskin fibroblast cultures by assaying the malondialde hyde (MDA) produced inside the cells. The MDA–thiobarbituric acid (TBA) adduct was assayed by HPLC using fluorometric quantification after extraction in n-butanol. Lactate dehydrogenase (LDH) release was used as a marker of aluminium toxicity. MDA production was significantly increased after 24 h incubation with aluminium and paralleled LDH release. Superoxide dismutase (SOD)+catalase and vitamins C and E added in the culture medium as oxygen radical and free radical scavengers were efficient in preventing MDA production by aluminium, indicating that oxidative processes are one of the main pathways whereby this metal induces cytotoxicity. The latter is also largely prevented, thus confirming the link between oxidative stress induced by aluminium and its cytotoxicity in human skin fibroblasts. Human & Experimental Toxicology (2001) 20, 477–481.

Key Words: aluminium chloride • human foreskin fibroblasts • LDH release • malondialdehyde • prevention of lipid peroxidation • super-oxide dismutase • catalase • vitamin E • vitamin C

Human & Experimental Toxicology, Vol. 20, No. 9, 477-481 (2001)
DOI: 10.1191/096032701682693053


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