BACKGROUND Portacaval shunting in rats produces a reduction of hepatic oxidant scavenging ability. Since this imbalance in hepatic oxidant/antioxidant homeostasis could coexist with systemic changes of oxidant stress/antioxidant status, plasma oxidants and antioxidant redox status in plasma of portacaval shunted-rats were determined. RESULTS Male Wistar male: Control (n = 11) and with portaca...

During the lipid peroxidation reaction, lipid hydroperoxides are formed as primary products. Several lines of evidence suggest that lipid hydroperoxides can trigger cell death in many cell types, including neurons. In a screening of lipid hydroperoxides which can induce toxicity in neuronal cells, we found docosahexaenoic acid hydroperoxides (DHA-OOH) induced much severe levels of reactive oxyg...

Murine and human macrophages rapidly decreased the level of cholesteryl ester hydroperoxides in low density lipoprotein (LDL) when cultured in media non-permissive for LDL oxidation. This process was proportional to cell number but could not be attributed to the net lipoprotein uptake. Macrophage-mediated loss of lipid hydroperoxides in LDL appears to be metal ion-independent. Degradation of ch...

Apoptosis plays a critical role in maintaining homeostasis of the intestinal epithelium. Dietary oxidants like peroxidized lipids could perturb cellular redox status and disrupt mucosal turnover. The objective of this study was to delineate the role of lipid hydroperoxide (LOOH) -induced redox shifts in intestinal apoptosis using the human colonic CaCo-2 cell. We found that subtoxic concentrati...

Damage to apoB100 on low density lipoprotein (LDL) has usually been described in terms of lipid aldehyde derivatisation or fragmentation. Using a modified FOX assay, protein hydroperoxides were found to form at relatively high concentrations on apoB100 during copper, 2,2'-azobis(amidinopropane) dihydrochloride (AAPH) generated peroxyl radical and cell-mediated LDL oxidation. Protein hydroperoxi...

BACKGROUND The correlation of S100A8/S100A9 with various inflammatory conditions, including autoimmune diseases have been reported. There is no study investigating the levels of S100A8/S100A9 in autoimmune thyroid diseases (AITD). AIMS We aimed to evaluate the level of serum S100A8/S100A9 in AITD. STUDY DESIGN Case control study. METHODS Fifty patients with AITD (25 Hashimoto's thyroiditi...

Background: Dimethylnitrosamine (DMN) is a potent member of nitrosamine family, which has toxic and carcinogenic potential. Several beneficial effects of statins have been described in patients with chronic kidney disease and in experimental models. The aim of this study is to investigate the protective effects of Simvastatin (SMN), Nigella Sativa Oil (NSO) and Thymoquinone (TQ) on DMN-induced ...

Phospholipid hydroperoxide glutathione peroxidase (PhGPx) is a unique selenoenzyme that directly detoxifies lipid hydroperoxides in situ. It therefore plays an important role in the protection of cellular membranes. PhGPx is expressed in most mammalian tissues. It is present as a mitochondrial form (L-PhGPx) and a cytosolic form (S-PhGPx). Overexpression of PhGPx has been shown to significantly...