JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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Association of oxidative DNA damage, protein oxidation and antioxidant function with oxidative stress induced cellular injury in pre-eclamptic/eclamptic mothers during fetal circulation.

Pre-eclampsia is a devastating multi system syndrome and a major cause of maternal, fetal, neonatal morbidity and mortality. Pre-eclampsia is associated with oxidative stress in the maternal circulation. To have an insight on the effect of pre-eclampsia/eclampsia on the neonates, the study was made to explore the oxidative status by quantification of byproducts generated during protein oxidation and oxidative DNA damage and deficient antioxidant activity in umbilical cord blood of pre-eclamptic/eclamptic mothers during fetal circulation. Umbilical cord blood during delivery from neonates born to 19 pre-eclamptic mothers, 14 eclamptic mothers and 18 normotensive mothers (uncomplicated pregnancy) as control cases was collected. 8-OHdG (8-hydroxy-2-deoxyguanosine), protein carbonyl, nitrite, catalase, non-enzymatic antioxidants (vitamin A, E, C), total antioxidant status and iron status were determined. Significant elevation in the levels of 8-OHdG, protein carbonyl, nitrite and iron along with decreased levels of catalase, vitamin A, E, C, total antioxidant status were observed in the umbilical cord blood of pre-eclamptic and eclamptic pregnancies. These parameters might be influential variables for the risk of free radical damage in infants born to pre-eclamptic/eclamptic pregnancies. Increased oxidative stress causes oxidation of DNA and protein which alters antioxidant function. Excess iron level and decreased unsaturated iron binding capacity may be the important factor associated with oxidative stress and contribute in the pathogenesis of pre-eclampsia/eclampsia which is reflected in fetal circulation.

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