PL
Badano wpływ soli kadmu na zawartość nadtlenków lipidowych i aktywność enzymów przeciwutleniających w wątrobie ciężarnej samicy oraz wątrobie płodowej i siedmiodniowego szczura. Zatruwanie solami kadmu przez 20 dni powodowało wzrost poziomu peroksydacji lipidów i obniżenie aktywności enzymatycznej obrony przeciwutleniającej w wątrobie matczynej i płodowej. Zmiany te ( za wyjątkiem spadku aktywności reduktazy glutationowej) nie utrzymywały się w wątrobie siedmiodniowego szczura. Podawanie witaminy E obniżało poziom nadtlenków lipidowych w badanych narządach.
EN
The experiments were performed on 60 pregnant female Wistar rats divided into 6 groups. The rats of the first and second group served as the controls. The animals of groups III-VI received per os a daily dose of 60 mg/kg body weight CdCl2 during 20 consecutive days. Group V and VI rats were additionally given vitamin E (1,5 mg/day). At day 19 of pregnancy, group I, III, V rats were killed, and their own their fetuses' livers were removed for analysis. Livers were also removed from 7-day old offspring of group II, IV, VI mothers. Intensity of lipid peroxidation, activity of antioxidant (superoxide dismutase, catalase, glutathione peroxidase) enzymes, and the activity of glutathione (glutathione synthetase, т glutamyl transpeptidase, glutathione reductase, glutathione-S-transferase) enzymes were determined in the 16000 x g, 30 min supernatant. MDA (a lipid peroxidation product) content in the livers of the CdCl2-treated pregnants and their offspring was found to be twice as high as that in the livers of the controls. Vitamin E supplementation caused a 20% and a 40% increase of lipid peroxidation in the maternal and foetal liver, respectively. Cadmium inhibited the activity of the enzymes responsible for protection against free oxygen and lipid radicals, both in the maternal and foetal liver. The activity of the enzymes responsible for the synthesis, degradation of glutathione and maintaining it in the reduced form was also decreased. The results of the study indicate that cadmium intake promotes lipid peroxidation and causes reduced antioxidant enzyme activities, which may result in non-reversible lesions of the maternal and foetal tissues.