Repositori URV

Identifier: TDX:506

Handle: https://hdl.handle.net/20.500.11797/TDX506

Authors:
Romeu Ferran, Marta

Abstract:
Numerous factors are related to oxidative stress (OS) in humans, which is particularly common in individuals with psychological or health problems. The following blood biomarkers were used to determine the oxidative status of healthy individuals: antioxidant enzymes [glutathione Stransferase (GST), superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), glutathione reductase (GR)], peptide peroxidation products and low molecular weight antioxidants [reduced and oxidized glutathione (GSH, GSSG), GSSG/GSH ratio], lipid peroxidation products [thiobarbituric acid reactive substances (TBARS)] and oxidizability measurements [haemolysis test]. The relationships between biomarkers were studied in a healthy group of individuals, and used to create a score of oxidative stress (SOS). SOS was clinically validated by applying it to a group of patients with chronic renal insufficiency (CRI), chronic obstructive pulmonary disease, sepsis, and acute myocardium infarction. SOS was also applyed in a various groups of healthy individuals and we studied the effect of sex, age, pregnancy, and lifestyle on oxidative stress. SOS was statistically validated with discriminating test. In conclusion, OS biomarkers were strongly related, and SOS was a useful clinical parameter for evaluating the effect of OS on the illness. This may be important in the future for preventing and treating OS with antioxidants.