8-Hydroxy-2-deoxyguanosine staining in placenta is associated with maternal serum uric acid levels and gestational age at diagnosis in pre-eclampsia

Kotaro Fukushima, Masaharu Murata, Kiyomi Tsukimori, Kaneki Eisuke, Norio Wake

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Abstract

BackgroundAbnormal activation and/or dysfunction of the maternal vascular endothelium have been implicated as a cause of the placental ischemia and oxidative damage associated with pregnancy-induced hypertension (PIH).MethodsTo clarify the relationship between systemic oxidative stress and placental damage induced by reactive oxygen species (ROS), we immunostained placentas from 27 PIH pregnancies and 41 normal pregnancies for 8-hydroxy-2-deoxyguanosine (8OHdG).ResultsPositive 8OHdG staining was significantly more frequent in the syncytiotrophoblasts from PIH pregnancies compared to normal pregnancies matched for maternal age/gestational age at delivery. Comparison of 8OHdG positive and negative PIH patients revealed that antenatal serum uric acid (UA) was significantly higher, gestational age at delivery was significantly lower and early onset PIH was more frequent in patients with 8OHdG positive staining in the placenta.ConclusionThese results suggest that ROS directly injures the placental syncytiotrophoblast in PIH patients and that elevated UA in PIH patients, at least partly, indicates placental damage induced by ROS. Moreover, the role and significance of ROS injury in the placenta may differ between early onset and late-onset type PIH.

Original languageEnglish
Pages (from-to)829-834
Number of pages6
JournalAmerican Journal of Hypertension
Volume24
Issue number7
DOIs
Publication statusPublished - Jul 1 2011

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Pregnancy Induced Hypertension
Pre-Eclampsia
Uric Acid
Placenta
Gestational Age
Mothers
Staining and Labeling
Serum
Reactive Oxygen Species
Pregnancy
Trophoblasts
8-oxo-7-hydrodeoxyguanosine
Maternal Age
Vascular Endothelium
Oxidative Stress
Ischemia
Wounds and Injuries

All Science Journal Classification (ASJC) codes

  • Internal Medicine

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8-Hydroxy-2-deoxyguanosine staining in placenta is associated with maternal serum uric acid levels and gestational age at diagnosis in pre-eclampsia. / Fukushima, Kotaro; Murata, Masaharu; Tsukimori, Kiyomi; Eisuke, Kaneki; Wake, Norio.

In: American Journal of Hypertension, Vol. 24, No. 7, 01.07.2011, p. 829-834.

Research output: Contribution to journalArticle

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AU - Murata, Masaharu

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AU - Eisuke, Kaneki

AU - Wake, Norio

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N2 - BackgroundAbnormal activation and/or dysfunction of the maternal vascular endothelium have been implicated as a cause of the placental ischemia and oxidative damage associated with pregnancy-induced hypertension (PIH).MethodsTo clarify the relationship between systemic oxidative stress and placental damage induced by reactive oxygen species (ROS), we immunostained placentas from 27 PIH pregnancies and 41 normal pregnancies for 8-hydroxy-2-deoxyguanosine (8OHdG).ResultsPositive 8OHdG staining was significantly more frequent in the syncytiotrophoblasts from PIH pregnancies compared to normal pregnancies matched for maternal age/gestational age at delivery. Comparison of 8OHdG positive and negative PIH patients revealed that antenatal serum uric acid (UA) was significantly higher, gestational age at delivery was significantly lower and early onset PIH was more frequent in patients with 8OHdG positive staining in the placenta.ConclusionThese results suggest that ROS directly injures the placental syncytiotrophoblast in PIH patients and that elevated UA in PIH patients, at least partly, indicates placental damage induced by ROS. Moreover, the role and significance of ROS injury in the placenta may differ between early onset and late-onset type PIH.

AB - BackgroundAbnormal activation and/or dysfunction of the maternal vascular endothelium have been implicated as a cause of the placental ischemia and oxidative damage associated with pregnancy-induced hypertension (PIH).MethodsTo clarify the relationship between systemic oxidative stress and placental damage induced by reactive oxygen species (ROS), we immunostained placentas from 27 PIH pregnancies and 41 normal pregnancies for 8-hydroxy-2-deoxyguanosine (8OHdG).ResultsPositive 8OHdG staining was significantly more frequent in the syncytiotrophoblasts from PIH pregnancies compared to normal pregnancies matched for maternal age/gestational age at delivery. Comparison of 8OHdG positive and negative PIH patients revealed that antenatal serum uric acid (UA) was significantly higher, gestational age at delivery was significantly lower and early onset PIH was more frequent in patients with 8OHdG positive staining in the placenta.ConclusionThese results suggest that ROS directly injures the placental syncytiotrophoblast in PIH patients and that elevated UA in PIH patients, at least partly, indicates placental damage induced by ROS. Moreover, the role and significance of ROS injury in the placenta may differ between early onset and late-onset type PIH.

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