The present study has been performed to evaluate the antimutagenic activity of quercetin, ascorbic acid and their combination against an oxidative mutagen. An effort was also made to correlate this activity to the in vitro antioxidant activity of these agents. Antimutagenicity testing was done in Ames Salmonella Assay system using Salmonella typhimurium TA102 against t-butylhydroperoxide as an ...

The brain is a major metabolizer of oxygen and yet has relatively feeble protective antioxidant mechanisms. This paper reviews the Janus-faced properties of reactive oxygen species. It will describe the positive aspects of moderately induced ROS but it will also outline recent research findings concerning the impact of oxidative and nitrooxidative stress on neuronal structure and function in ne...

BACKGROUND Vitiligo is a chronic, common disease of unknown etiology, and oxidative stress is suggested to have a role in its etiopathogenesis. OBJECTIVE Advanced oxidation protein products (AOPPs), prooxidant-antioxidant balance (PAB), and ferric-reducing antioxidant power (FRAP) were evaluated regarding their role in the pathogenesis of vitiligo as well as their relationship with clinical p...

In stress conditions, the formation of ROS by mitochondria increases, which leads to a shift in the antioxidant prooxidant balance toward increasing the ROS content in the cell. The interaction of ROS with polyunsaturated fatty acids, which enter into the composition of the lipids of mitochondrial membranes, leads to the activation of lipid peroxidation (LPO). Herewith in 2.5 3 times increased ...

The balance between reactive oxygen species production and antioxidant activity has an important role in oxidative stress associated diseases including coronary artery disease. In this study, the prooxidant-antioxidant balance (PAB) and its correlations with serum lipid levels, uric acid levels, and severity of coronary artery involvement were examined. The aim of this study was to determine th...

Pine, grape and witch hazel byproducts are rich sources of polyphenols. From extracts (OW) soluble in both ethyl acetate and water we have generated a collection of fractions differing in percentage of pyrogallol groups. The mixtures were highly active as free radical scavengers against DPPH. The phenolics protected red blood cells from free radical induced hemolysis and were mildly cytotoxic t...

The aims of the present study were to evaluate oxidative status, by investigating the serum Paraoxonase/Arylesterase (PON/ARE) activities along with conjugated dienes in patients with IBS and controls and to confirm the link between oxidative stress and IBS. Thirty IBS patient and 30 healthy subjects were recruited. Total serum cholesterol, low-density lipoprotein (LDL), high-density lipoprotei...

Background: Tubal ligation is one of the most common contraceptive methods in the world. Some researchers believe that tubal ligation has complications. It is assumed oxidative stress can produce these complications. The aim of this study was to evaluate oxidative stress and ovarian function after tubal ligation. Materials and Methods: In this study, female rats (weighting 200-250 g) were divid...