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Polish Archives of Internal Medicine 2003-Jul

[Assessment of blood superoxide dismutase, glutathione peroxidase activity and malondialdehyde concentration as oxidation status parameters in obese women].

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Krystyna Zwirska-Korczala
Jerzy Jochem
Barbara Rybus-Kalinowska
Renata Polaniak
Ewa Birkner

Sleutelwoorden

Abstract

Obesity is accompanied by a high incidence of atherosclerosis, arterial hypertension and non-insulin dependent diabetes mellitus in the pathogenesis of which is associated with oxygen-derived free radicals. The aim of the study was to compare blood oxidation status in obese women without coexisting diseases and in healthy women with normal body mass index (BMI). Studies were performed in 29 premenopausal obese (BMI 35.79 +/- 4.62 kg/m2) and 31 lean (BMI 22.29 +/- 1.05 kg/m2) women. Plasma lipid profile, activities of antioxidant enzymes: copper/zinc (Cu/ZnSOD) and manganese-containing superoxide dismutase (MnSOD) and glutathione peroxidase (GSH-Px), as well as concentrations of malondialdehyde (MDA)--a product of lipid peroxidation, were examined. In obese women there were significantly higher concentrations of total cholesterol (5.02 +/- 0.83 vs. 4.15 +/- 0.43 mmol/l; p < 0.05), LDL-cholesterol (3.12 +/- 0.90 vs. 2.35 +/- 0.42 mmol/l; p < 0.05) and triglycerides (1.72 +/- 0.85 vs. 1.02 +/- 0.18 mmol/l; p < 0.01), while HDL-cholesterol level was lower (1.01 +/- 0.16 vs. 1.25 +/- 0.2 mmol/l; p < 0.05). Moreover, in comparison to the control group, obese women showed increased activities of plasma MnSOD (6.72 +/- 1.43 vs. 4.99 +/- 0.58 NU/ml; p < 0.05) and erythrocyte GSH-Px (35.38 +/- 10.31 vs. 19.15 +/- 7.12 mumol NADPH2/g Hb/min; p < 0.001), and concentrations of plasma MDA (2.93 +/- 0.53 vs. 2.16 +/- 0.31 mumol/l; p < 0.05) and erythrocyte MDA (2.24 +/- 0.30 vs. 1.59 +/- 0.36 mumol/g Hb; p < < 0.001). There were no differences between the two groups in activities of plasma and erythrocyte Cu/ZnSOD. In conclusion, the results demonstrate disturbances in oxidation status in premenopausal obese women with abnormal lipid profile, which may indicate the association between oxygen-derived free radicals and the increase in the incidence of obesity-related diseases.

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