For the majority of organisms on Earth, life without oxygen is impossible. Animals, plants and many microorganisms rely on oxygen for the efficient production of energy. However, the high oxygen concentration in the atmosphere is potentially toxic for living organisms. Recently free radical research has generated valuable information for further understanding not only detrimental, but also bene...

Tissues in the anterior segment of the eye are particular vulnerable to oxidative stress. To minimise oxidative stress, ocular tissues utilise a range of antioxidant defence systems which include nonenzymatic and enzymatic antioxidants in combination with repair and chaperone systems. However, as we age our antioxidant defence systems are overwhelmed resulting in increased oxidative stress and ...

Cichoric acid (CA), a plant-based nutraceutical, is extracted from Echinacea purpurea and other edible plants and vegetables and exhibits multiple biological functions, including antioxidant and hypoglycemic effects. The objective of this study was to determine the effect of CA on the energy regulation pathways and the antioxidant response system in insulin resistance and diabetes-induced hepat...

BACKGROUND To investigate the cardiotoxic role of reactive oxygen species (ROS) and of products derived from catecholamines auto-oxidation, we studied: (1) the response of antioxidant cardiac cellular defence systems to oxidative stress induced by norepinephrine (NE) administration, (2) the effect of NE administration on cardiac beta1-adrenergic receptors by means of receptor binding assay, (3)...

Oxidative stress is a phenomenon associated with imbalance between production of free radicals and reactive metabolites (e.g. superoxide and hydrogen peroxide) and the antioxidant defences. Oxidative stress in individuals with Down syndrome (DS) has been associated with trisomy of the 21st chromosome resulting in DS phenotype as well as with various morphological abnormalities, immune disorders...

Free radicals are responsible for causing pathogenesis of healthy cells to lose their structures and functions to develop various degenerative diseases that caused due to aging such as cancer, cardiovascular disease, cataracts, immune system decline, brain dysfunction as well as illness caused due to pollution, cigarette smoke, drugs, illness, stress. So, many dieticians believe that the Recomm...

Abstract Background: Diabetes is a metabolic disorder with adverse effects on haematological parameters level, oxidative stress and antioxidant defence system. This study aimed to investigate the effects of Rosa canina (RC) fruit hydro alcoholic extract on oxidative stress, total antioxidant capacity (TAC) and haematological parameters in diabetic mice. <st...

AIMS To determine possible changes in gingival crevicular fluid (GCF) antioxidant defence in chronic adult periodontal disease and to investigate the nature of the local radical scavenging mechanisms, with particular reference to glutathione. METHODS GCF and plasma were collected from patients with chronic periodontitis and age and sex matched control subjects (n = 10). Polymorphonuclear leuc...

One of the major etiologies in pathogenesis of type 2 diabetes especially complications is oxidative stress. Aqueous extract of Ficus religiosa at a dose of 100 and 200 mg/kg orally decreased the fasting blood glucose in streptozotocin induced type 2 diabetic rats. The drug had enzyme induction effect with respect to catalase (CAT) and glutathione peroxidase (GSH-Px) activity, however decreased...