Three constitutive forms of superoxide dismutase activity have been demonstrated in the cyanobacterial marine picoplankter Synechococcus sp. WH 7803 using polyacrylamide gel activity staining techniques. A protein which gave a positive non-haem iron stain on native polyacrylamide gels exhibited N-terminal similarity to both the iron superoxide dismutase and the manganese superoxide dismutase of...

Human manganese superoxide dismutase is a mitochondrial metalloenzyme that is involved in protecting aerobic organisms against superoxide toxicity, and has been implicated in slowing tumor growth. Unfortunately, this enzyme exhibits strong product inhibition, which limits its potential biomedical applications. Previous efforts to alleviate human manganese superoxide dismutase product inhibition...

objective(s):the aim of this study was to evaluate the oxidative status and dna integrity in testes of wistar rat offspring exposed to omega-9 monounsaturated (mufa) at different times of late organogenesis. materials and methods:sixty female rats were divided into six groups of 10 animals. the first group served as control and received the drug vehicle, olive oil (1 ml/kg/day). the second, thi...

introduction: perepubertal varicocele can result in hypotrophy of testes, sperm damage and decrease the function of leydig cells in future. pathophysiology of varicocele is unclear. increased reactive oxygen species (ros) is a major theory. there are many controversies in treatment of pediatric varicocele. flaxseed (fs) is the richest source of lignans with antioxidant properties. the aim of th...

in our previous studies we have evaluated the role of antioxidants and trace elements in potentially malignant disorders and cancers of the oral cavity, taking into consideration the importance of antioxidants as biomarkers in cancer detection. we felt that other than evaluation, the correlation and interdependence that existed among antioxidants and trace elements require further evaluation in...

compelling evidence suggests that the oxidative stress plays a key role in the pathophysiology of cardiovascular disease (cvd). superoxide dismutase (sod) enzymes play a major role in detoxification of reactive oxygen species and protection against oxidative stress. we examined the possible association between a 50-bp insertion/deletion in the sod1 promoter 1684-bp upstream of the sod1 atg with...

carnation (dianthus caryophyllus l.) is one of the most important cut flowers in the world. themajority of thecarnation cultivars are sensitive to ethylene which affected the physiological and biochemical postharvest characteristics of these flowers.applying inhibitors of biosynthesis and action of ethylene is important factor to protect the display quality and extend postharvest life. in order...

mitochondrial functions have a major impact on t-cell functionality. in this study we characterized whether mitochondrial function in the neonatal t-cells differs from that in the adult t-cells during short t-cell activation. methods: we used fow cytometry methods to test mitochondrial mass and to monitor mitochondrial ca2+ levels, mitochondrial potential and superoxide generation in parallel w...

ferula gummosa boiss is a good source of biologically active compounds such as monoterpene and sesquiterpene derivatives. there are also several reports on antioxidant effects of these compounds. the aim of this study was to investigate the effect of daily administration of f. gummosa root hydro-alcoholic extract on serum oxidant-antioxidant status. twenty four wistar rats were randomly divided...