Ecotoxicology and environmental safety · 2000
Effects of NADH and H(2)O(2) on chromate-induced human erythrocytes hemoglobin oxidation and peroxidation.
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Fernandes M A, Geraldes C F, Oliveira C R, Alpoim M C
Аннотация
The effects of NADH and H(2)O(2) on chromate-induced human erythrocyte hemoglobin oxidation and peroxidation were studied. It was observed that NADH decreases the levels of chromate-induced human erythrocyte hemoglobin oxidation and peroxidation. H(2)O(2) decreases the levels of chromate-induced hemoglobin oxidation, but increases the levels of chromate-induced peroxidation. The ability of H(2)O(2) to decrease the levels of chromate-induced hemoglobin oxidation is higher than that observed for NADH. Furthermore, H(2)O(2) increases the inhibitory effect of NADH on chromate-induced hemoglobin oxidation, but decreases the NADH effect on chromate-induced peroxidation. The meaning of these results is discussed in terms of involvement of reactive chromium(V) species and reactive oxygen species in the mechanism by which chromate induces its effects in human erythrocytes.