antioxidant activity of olive leaf extract ( L.) and its protective effect on oxidative damage in human erythrocytes.

Aims: This study aimed to evaluate antioxidant capacity of olive leaf extract (OLE), L., and its protective effect on peroxyl radical-induced oxidative damage in human erythrocytes.

Main Methods: The OLE was evaluated by the following assays: i) total phenolic and flavonoid content; ii) oleuropein content; iii) Ferric reducing antioxidant power (FRAP); iv) antioxidant activity against ABTS, DPPH and reactive oxygen and nitrogen species: superoxide anion ( ), hypochlorous acid (HOCl) and nitric oxide (NO) and v) protective effect on peroxyl radical-induced oxidative damages in human erythrocytes as hemolysis, thiobarbituric acid reactive substances (TBARS) formation and oxyhemoglobin oxidation.

Influence of indole acetic acid on antioxidant levels and enzyme activities of glucose metabolism in rat liver.

Indole acetic acid (IAA) is an auxin and can be synthesized in animals. This compound is metabolized in vitro by peroxidase, producing reactive oxygen species. The toxic effect of indole acetic acid in leukocytes is associated with peroxidase activities and these processes have been implicated in activation of glucose and glutamine metabolism.

Effect of indole acetic acid administration on the neutrophil functions and oxidative stress from neutrophil, mesenteric lymph node and liver.

This study was done to investigate the effect of the in vivo administration of indole acetic acid (IAA) on the neutrophil function, the activities of antioxidants enzymes in neutrophils, the mesenteric lymph node and on the oxidative stress in liver and plasma. The animals received subcutaneous administration of IAA in a phosphate-buffered saline (the control group received only the phosphate-buffered saline). The other groups received IAA at concentrations of 1 mg (T1), 2 mg (T2) and 18 mg (T3) per kg of body mass per day.