Oxidant-antioxidant status in pair-matched maternal and cord blood of normo & preeclamptic patients

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JOURNAL of CHINESE CLINICAL MEDICINE VOLUME 4 | NUMBER 5 | May 2009

241

ARTICLES

Oxidant唱 antioxidant status in pair唱 matched maternal and cord blood of normotensive and preeclamptic patients

Mohd Suhail ,Mohd Faizul唱 Suhail 1,2

[ Abstract] Objective Preeclampsia is associated with oxidative stress in maternal circulation.An increase in lipid peroxidation products and a decrease in antioxidant activity in preeclamptic women have been reported by us and other workers.The aim of the present study was to evaluate oxidative stress in infants born to preeclamptic mothers.Methods We investigated the concentrations of nitric oxide( NO) ,malondialdehyde( MDA) ,reduced glutathione( GSH) ,and uric acid in the cord blood of the newborns from pregnancies complicated by preeclamp唱 sia,comparing with that of normal pregnancies.Their levels were also estimated in pair唱 matched maternal blood of both normotensive and preeclamptics.Results MDA concentration was 9畅58 ±1畅89 nmol / gHb in preeclamptic maternal blood,significantly higher compared to 6畅86 ±0畅88 nmol / gHb in normotensive maternal blood,whereas its concentration was 7畅52 ±1畅25 nmol / gHb in cord,significantly low compared to pair唱 matched preeclamptic maternal blood.NO concentration, in terms of stable metabolites was 26畅46 ± 4畅65 μmol / L and 28畅15 ± 4畅20 μmol / L in preeclamptic maternal and cord plasma respectively,both significantly higher compared to pair唱 matched control plasma( maternal =21畅13 ±4畅06 μmol / L and cord =19畅22 ±3畅79 μmol / L) .GSH level was found to be 8. 74 ±1. 57 μmol / gHb in control maternal blood and 6畅96 ±2畅08 μmol / gHb in preeclamptic mater唱 nal blood.However,there was no significant difference between preeclamptic maternal and cord blood( 5畅97 ± 1畅54 μmol / gHb) .Uric acid content was 497畅67 ±44畅92 μmol / L in preeclamptic maternal plasma and 526畅3 ± 75畅3 μmol / L in cord plasma, significantly higher in comparison to their respective normal maternal (278畅5 ± 57畅0 μmol / L) and cord(301畅9 ±69畅9 μmol / L) levels.Conclusions The higher levels of NO and uric acid in cord blood and insignificant change in GSH levels in paired唱 matched preeclamptic maternal and cord blood indi唱 cate a compensatory role in neonates born to preeclamptic group.Thus,we conclude that the oxidative stress status is low in the blood of neonates compared to its level in the pair唱 matched preeclamptic mothers.Further studies are needed to explore strategies so that the normal levels of antioxidants are maintained to combat preeclampsia in women at high risk,including increased risk of fetal growth restriction and induced premature delivery due to dis唱 ease progression on the maternal or fetal side. [Key words] malondialdehyde;nitric oxide; glutathione;uric acid;maternal and cord blood;normotensive and preeclamptic women INTRODUCTION Preeclampsia( PE ) is a complex multisystem disorder that is associated with hypertension,edema and protein唱 uria during pregnancy.For the fetus,the PE syndrome could have serious consequences, including increased

risk of fetal growth restriction and induced premature delivery due to disease progression on the maternal or [1,2] fetal side .Maternal endothelial dysfunction is believed to be the common pathway leading to the [3] syndrome of PE .Nitric oxide ( NO ) mediates many

1 Department of Biochemistry,University of Allahabad,Allahabad唱 211002,India

2 City Nursing & Maternity Home Research Center,21,Minhajpur,Allahabad唱 211003,India

Correspondence to Prof.Mohd Suhail,Honorary Director,City Nursing & Maternity Home Research Center,21,Minhajpur Allahabad唱 211003,India E唱 mail:profmsuhail@gmail.com


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