Malondialdehyde and antioxidant enzymes in second and third trimesters of pre-eclamptic Nigerian women

Abstract

Aim and Objective: To determine changes in malondialdehyde (product of lipid peroxidation) and antioxidant enzymes (Superoxide Dismutase, Glutathione Per- oxidase) levels in pre-eclamptic Nigerian women Patients and Methods: A Total of 100 subjects each for pre-eclamptic, apparently normal and non pregnant women were recruited into the study. Venous blood samples were taken from the participants during second and third trimesters of pregnancy and at the point of contact for non pregnant women. Malondialdehyde, glutathione peroxidase and superoxide dismutase were measured accordingly from plasma and haemolysate prepared from whole blood. Variables were analysed using SPSS ver- sion 16, taking level of significance to be 0.05 Results: Plasma malondialdehyde in the third trimester (3.13±0.61μmol/l) of pre- eclamptic subjects was higher than in the second trimester (3.00±1.21μmol/l). Plasma malondialdehyde in the third trimester of normal pregnancy (2.03±0.71μmol/l) was also found to be significantly higher than in the second trimester (1.65±0.62μmol/ l)(p<0.0001). Glutathione peroxidase in pre-eclamptic subjects was significantly higher in the third trimester (2804.11±1573.00U/L) as compared to the second tri- mester (2655.00±1751.30U/L), p= 0.0001. Glutathione peroxidase activity in the third trimester of normal pregnancy (3339.50±1733.80U/L) was also found to be higher than in the second trimester (3023.50±1115.90U/L)(p=0.131). Superoxide dismutase activity was significantly lower in the third trimester of pre-eclamptic pregnancy when compared to second trimester (110.40±59.47 Vs 118.01±64.41 U/ ml)(p<0.039) .Similarly, superoxide dismutase activity was significantly lower in the third trimester of normal pregnancy (110.40±59.47U/ml) than in the second trimester (153.01±71.85U/ml)(p<0.0001). Conclusion: There was an increased level of lipid peroxidation products, malondialdehyde in subjects with pre-eclampsia. This was more in the third trimes- ter. There was an increased oxidative stress in pre-eclampsia as evidenced also by low serum level of superoxide dismutase in the third trimester. Diet rich in antioxi- dant enzyme might be beneficial

Keywords

• normal pregnant women
• pre-eclamptic women
• non-pregnant women
• malondialdehyde
• glutathione peroxidase
• superoxide dismutase