superoxide


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Related to superoxide: hydroxyl radical, superoxide dismutase

superoxide

 [soo″per-ok´sīd]
any compound containing the highly reactive superoxide ion O2, a common intermediate in numerous biological oxidations.

su·per·ox·ide

(sū'pĕr-oks'īd),
An oxygen free radical, O2-, which is toxic to cells.

superoxide

/su·per·ox·ide/ (-ok´sīd) any compound containing the highly reactive and extremely toxic oxygen radical O2−, a common intermediate in numerous biological oxidations.

superoxide

[-ok′sīd]
a common reactive form of oxygen that is formed when molecular oxygen gains a single electron. Superoxide radicals can attack susceptible biological targets, including lipids, proteins, and nucleic acids.

su·per·ox·ide

(sū'pĕr-oks'īd)
An oxygen free radical, O2-. which is toxic to cells.

superoxide

any compound containing the highly reactive superoxide ion O2, a common intermediate in numerous biological oxidations and an important killing mechanism generated in lysosomes of phagocytes after they have phagocytosed microorganisms.

superoxide dismutase
an enzyme that converts peroxides to two kinds of molecules in different states of oxidation. Present in aerobic bacteria.
References in periodicals archive ?
Conclusion: Levels of serum superoxide dismutase were elevated with concomitant amplification of copper-zinc superoxide dismutase gene.
In this study, we used the human lung carcinoma cell line H661 and Epstein-Barr virus (EBV)- transformed B-lymphoblastoid cell line (B-LCL) to investigate the impact of these four bioactive compounds on ROS generation by NOX, and the scavenging of superoxide and/or [H.
One such application of superoxide ions generated in in ionic solvents is for the conversion of carbon dioxide into carbonate, a valuable chemical with a diverse range of industrial applications.
Erythrocyte superoxide dismutase, catalase activities and plasma nitrite and nitrate levels in patients with Behget disease and recurrent aphthous stomatitis.
Giri, "Novel copper superoxide dismutase mimics and damage mediated by O2.
The following formula was used in order to calculate the percentage of the inhibition of superoxide anion scavenging formation: % Inhibition = (A0 - A1/A0) x 100, where A0 is the absorbance of the control, and A1 is the absorbance in the presence of the samples or standards.
In aerobic organisms, SOD protects cells from superoxide anions by converting superoxide into oxygen and hydrogen peroxide.
Direct and uncomplicated effects of riboflavin on hydrogen peroxide or superoxide in vitro were not able to be located.
Various tests like reducing power ferric reducing antioxidant power linoleic acid assay DPPH nitric oxide superoxide and hydrogen peroxide radical scavenging assays for evaluation of antioxidant activity were carried out in vitro (Ravi Narayan Venkatachalam 2012).
In addition to uncoupling, peroxynitrite formation can also occur when levels of nitric oxide are so high that superoxide dismutase is overcome and can no longer provide dismutation activity (Vinten-Johansen, 2000).
Hydroxyl radical is also formed in the Haber-Weiss reaction with the participation of hydrogen peroxide, superoxide anion and ferrous cation [10]:
Although superoxide anion production is essential for bacterial cell killing, the subsequent release of hydrogen peroxide and other additional reactions produces more dangerous ROS, including singlet oxygen and the hydroxyl radical.