The potential antisenescence effect of eight synthetic urea compounds was investigated in excised barley (Hordeum vulgare L.) leaves which were induced to senesce by incubation in complete darkness. The compounds having uncyclic ureido group showed higher chlorophyll retention activity than those with cyclic ureido group. Compounds 1, 6 and 4PU had long-term protecting effects on chlorophyll de...

The aim of the study was to investigate the influence of administration of chlorpyrifos and/or enrofloxacin on the activity of chosen antioxidative enzymes i.e.: superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPx) in erythrocytes of rats. Chlorpyrifos was administered by stomach tube during 28 days at a dose of 3 mg/kg bw (0.02 LD50), and enrofloxacin was administered by...

Cancer and atherosclerosis are major causes of death in western societies. Deregulated cell death is common to both diseases, with significant contribution of inflammatory processes and oxidative stress. These two form a vicious cycle and regulate cell death pathways in either direction. This raises interest in antioxidative systems. The human enzymes paraoxonase-2 (PON2) and PON3 are intracell...

Ultraviolet irradiation directly affects the skin and promotes photoaging by causing depletion of antioxidative enzymes. We recently reported that M1/M2 macrophage ratio is altered in photo-aged skin. However, relationship between balance expression enzymes has not been fully investigated. Here, we show skewing related to reduction enzyme peroxiredoxin 4 (PRDX4) it may lead photoaging. performe...

BACKGROUND & OBJECTIVES Irradiation with 131I is used for the treatment of various thyroid disorders. It is likely that radioiodine while in systemic circulation may cause some adverse effects on antioxidative enzymes present in red blood cells (RBCs). Zinc, on the other hand, has been reported to maintain the integrity of cells under certain toxic conditions. The present study was conducted to...

Seasonal changes in the total phenolic content, flavonoid content, specific activity of the enzyme polyphenol oxidase (PPO) and that of the antioxidative enzymes-catalase (CAT) and peroxidases (POX) were analyzed in three leafy liverworts, namely Solenostoma crenulata, Chiloscyphus gollani and Fossombronia himalayensis. In the rainy season (July–September), the plants were in their young juveni...

Drought is one of the major environmental problems in agricultural field worldwide. The present study investigated the effects of water deficit caused by exogenous application of polyethylene glycol (PEG) on cabbage (Brassica oleracea var. capitata) grown in hydroponic culture. Root length, shoot length, dry weight, and relative water content of the seedlings significantly decreased in dose dep...

Viruses, including herpes viruses, can alter oxidative balance by either increasing the formation of free radicals or inhibiting synthesis of enzymes involved in oxidative defense within host cells. This study examined the occurrence of oxidative and antioxidative balance in cows naturally infected with bovine herpesvirus type 1 (BHV-1) under field conditions. Clinical history indicated that co...

Di-(2-ethylhexyl) phthalate (DEHP) is the most widely used plastizer in the world and can suppress testosterone production via activation of oxidative stress. Genistein (GEN) is one of the isoflavones ingredients exhibiting weak estrogenic and potentially antioxidative effects. However, study on reproductive effects following prepubertal multiple endocrine disrupters exposure has been lacking. ...