the first reaction between food components and biological tissues occurs in the oral cavity. saliva modulates the ecosystem in the oral cavity and plays a critical role in oral homeostasis. in addition, saliva is a first line of defense against free radical-mediated stress. salivary antioxidant defense mechanisms seem to be very important. in this study we discuss in detail free radicals (fr) a...

heat stress (hs) often blamed for suboptimal reproductive efficiency and is a worldwide problem, which inflicts heavy economic losses reflected in limiting the breeding season of rabbits to be normally from september to may in northern hemisphere and subtropical regions. the present experiment was conducted to study the effect of summer heat stress and the alleviating effect of some antioxidant...

1. Free radicals, antioxidant enzymes and oxidative stress 2. Natural anoxia tolerance and adaptations to oxidative stress 2.1. Antioxidants and garter snakes under anoxia exposure 2.2. Antioxidants and leopard frogs under anoxia and reoxygenation 2.3. Antioxidants and goldfish under anoxia and reoxygenation 2.4. Antioxidants and turtles under anoxia and reoxygenation 2.5. Lipid peroxidation, x...

To examine local and systemic oxidative status of lung cancer (LC) and oxidant effects of radiotherapy (RT), this study evaluated antioxidants and markers of oxidative and nitrosative stress in bronchoalveolar lavage (BAL) fluid and in the blood of 36 LC patients and 36 non-cancer controls at baseline and during and after RT for LC. LC patients had higher baseline serum urate, plasma nitrite an...

Flying is an energy demanding activity that imposes several physiological challenges on birds, such as increase in energy expenditure. Evidence from sports medicine shows that exhausting exercise may cause oxidative stress. Studies on avian flight have so far considered several blood parameters, such as uric acid, corticosteroids, or circulating free fatty acids, but only one study has analysed...

OBJECTIVES The purpose of this study was to determine the impact of changes in oxidative stress and antioxidant status in response to playing tennis in HOT (∼36°C and 35% relative humidity (RH)) and COOL (∼22°C and 70% RH) conditions. METHODS 10 male tennis players undertook two matches for an effective playing time (ie, ball in play) of 20 min, corresponding to ∼122 and ∼107 min of total pla...

Oxidative stress has been implicated in the pathogenesis of numerous diseases. However, large interventional studies with antioxidants failed to show benefits in the prevention or treatment of cardiovascular diseases, cancer, or diabetes mellitus. Numerous clinical studies have confirmed the association of oxidative stress markers and periodontitis. Technical and biological variability is high ...

Polycystic ovarian syndrome (PCOS) is a condition that increases the risk of metabolic diseases, such as insulin resistance, diabetes mellitus, and obesity, among others. Oxidative stress state elevated oxidants reduced antioxidants, which can be detrimental to body. Reduced glutathione (GSH) an important material with antioxidant properties. This study aimed investigate status oxidative in PCO...

Behcet's disease (BD) is a chronic systemic inflammatory disease. Inflammatory reactions trigger the oxidative stress and oxidants decrease the level of antioxidants. In the present study, we aimed to determine serum oxidative/antioxidative status in patients with BD. Serum antioxidative status was evaluated by measuring total antioxidant capacity (TAC), paraoxonase 1, arylesterase, sulfhydryl ...

background: this study investigated the protective effects of aqueous extracts of anogeissus leiocarpus (dc) guill & perr (combretaceae) and terminalia avicennioides guill & perr (combretaceae) root barks, as well as their 1:1 (w/w) mixture on liver redox and haematological parameters of diethylnitrosamine-treated rats. methods: rats were orally administered distilled water, diethylnitrosamine ...