ACTA BIOLOGICA HUNGARICA, cilt.57, sa.4, ss.403-413, 2006 (SCI-Expanded)
In our study, the protective effects of vitamin E and Se ( selenium) against cigarette smoke hazards on second-hand smoker ( passive smoker) male mice ( Balb/c) were investigated. Serum MDA levels in the smoke-exposed mice were found higher than serum MDA levels of control mice and Se-and vitamin E-treated mice. But, the MDA levels of smoke- exposed plus Se- and vitamin E-treated mice were found lower than MDA levels of smoke- exposed mice at the end of the three and five months. According to these results, application of vitamin E and Se, when given to smoke- exposed mice together, had an additive protective effect against cigarette smoke hazards ( p < 0.05). Vitamin E also had protective effect on formation of 8-OHdG in smoke-exposed mice. The serum 8-OHdG amounts of smoke- exposed plus vitamin E-treated mice were found low, but the serum 8-OHdG amounts of smoke- exposed mice were found high. Also 8-OHdG levels in the serum of the smoke- exposed mice were increased which occurs as a result of DNA oxidation ( p < 0.05). At the end of the three and five months, COMT ( catechol-omethyl transferase) activity of smoke- exposed mice livers were increased but, vitamin E and/or Se showed a significant protective effect on changing of COMT activity only at the end of the 5 months. Our results showed that MDA levels and 8-OHdG amounts were increased in the serum of smoke-exposed mice. On the other hand, vitamin E and Se had an additive protective effect against increasing MDA level. Also vitamin E had a protective effect against formation of 8-OHdG amounts and COMT activity alterations.