The activities of superoxide dismutase and glutathione peroxidase in the red cells of normal and acatalasemia bloods were compared. Superoxide dismutase activity in the red cells of Japanese acatalasemia blood was higher than in normal control, while glutathione peroxidase activity remained within normal limits. Cyanide sensitivity of superoxide dismutase in the red cells of acatalasemia blood ...

A new method for the determination of glutathione peroxidase activity in erythrocytes was developed. The present method was applied to the measurement of hydrogen peroxide removal rates by glutathione peroxidase in erythrocytes at 70 microM hydrogen peroxide under simulated in vivo conditions. The removal rates by glutathione peroxidase in mouse erythrocytes were twenty-times faster than those ...

BACKGROUND This investigation describes the relationship between glutathione peroxidase activities, an antioxidant enzyme, and the oxidative status in diabetic rat blood. METHODS Malondialdehyde level and glutathione peroxidase activity were measured by spectrophotometric techniques. RESULTS AND CONCLUSIONS Malondialdehyde content in the diabetic rats group was increased compared to that in...

Oxidative stress is believed to play a central role in aging and age-associated diseases. It leads to oxidative changes in human red blood cells (RBCs) in vivo and in vitro. In this study, we evaluated the oxidative damage to the erythrocytes during aging in the humans using RBC as a model, by measuring the cytosolic antioxidant enzyme glutathione peroxidase (GPx) activity. GPx activity was fou...

the chemical compound dl-?-amino-n-butyric acid (baba) has been introduced as a promoter of induction of resistance in plants against plant pathogens. in this study, promotion of induction of some such defense compounds as peroxidase and polyphenol oxidase enzymes through dl-?-amino-n-butyric acid application against root knot nematode (meloidogyne javanica) was investigated in cucumber. result...

in order to evaluate the physiological and biochemical traits in response to salinity, six varieties of wheat were cultivated in a split plot based on randomized complete block design in the growth chamber in the department of agronomy, faculty of agriculture, university of maragheh. seedlings of wheat cultivars, in three to four leaves stage were treated with 200 mm nacl for 14 days. after the...

an experiment was conducted to determine the aging mechanism in safflower seed using natural aging treatment (storing seed at room temperature for six years) and accelerated aging ( incubating the seed at 41?c and close to 100% relative humidity for 4 ,8 and 12 days). the results indicated that both natural and accelerated aging reduced germination percentage, seed vigor and activity of catalas...

A biotin-tyramine conjugate (1) was found to covalently cross-link with peroxidase antibody 7G12 upon the catalytic oxidation of the tyramine moiety in the presence of hydrogen peroxide (H2O2). On the basis of this observation, a novel strategy was developed to select mutants of 7G12 Fab with enhanced peroxidase activity from a library of phage displayed antibodies. In such a selection, tyramin...