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Korean Journal of Obstetrics & Gynecology 2002;45(7):1113-1118.
Published online July 1, 2002.
The Changes of Serum Nitric Oxide and Platelet Activating Factor Concentrations in Preeclampsia.
Byoung Jae Lee, Tae Woong Hwang, Dong Hoon Baek, Moon Seok Cha, Goo Hwa Je
Department of Obstetrics and Gynecology, College of Medicine, Dong-A University, Busan, Korea.
Abstract
OBJECTIVE
The aim of this study is to determine whether any association exists between preeclampsia and the maternal serum level of nitric oxide (NO) and platelet activating factor (PAF). METHODS: NO concentrations were measured using Stuehr's method and PAF concentrations were measured with [3H]PAF scintillation proximity assay (SPA) system (Amersham Pharmacia Biotech). Data were analyzed with SAS windows version 6.12, with significance established at p<0.05. RESULTS: The mean (+/-SD) maternal serum concentrations of NO were significantly higher in the group with severe preeclampsia (5.535+/-0.343 ug/ml) and mild preeclampsia (5.891+/-0.481 ug/ml) than in the normotensive pregnancy group (2.036+/-0.744 ug/ml) (p<0.05). The mean (+/-SD) maternal serum concentrations of PAF were significantly higher in the group with severe preeclampsia (928.9+/-32.3 ng/ml) and mild preeclampsia (789.1+/-63.9 ng/ml) than in the normotensive pregnancy group (435.8+/-59.5 ng/ml) (p<0.05). The mean birth weight was lower in the mild and severe preeclampsia groups than in the normotensive pregnancy group (p<0.05). CONCLUSION: Maternal serum NO and PAF concentrations were more increased in preeclampsia than normotensive pregnancy group. NO may therefore serve as compensatory mechanism for vasoconstriction of preeclampsia and PAF as a marker for the risk of preeclampsia.
Key Words: Preeclampsia, Nitric oxide, Platelet activating factor, Birth weight


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