Nitric oxide and peroxynitrite platelet levels in women with small-for-gestational-age fetuses.
BJOG
; 115(1): 14-21, 2008 Jan.
Article
em En
| MEDLINE
| ID: mdl-18053099
ABSTRACT
OBJECTIVE:
The placenta produces reactive oxygen species (ROS) including nitric oxide (NO) and peroxynitrite (ONOO(-)) that have pronounced effects on placental function. Excessive ROS production may occur in pathological pregnancies, such as those complicated by small-for-gestational-age (SGA) fetuses.DESIGN:
The aim of the present work was to study NO and ONOO(-) levels in platelets of pregnant women with SGA fetuses compared with a control group. SETTING AND POPULATION The study was performed on 30 pregnant women with SGA fetuses (SGA group) and on 30 healthy pregnant women (appropriate-for-gestational-age [AGA] group) matched for maternal and gestational age. All women included in this study were in the third trimester of pregnancy.METHODS:
Platelets were isolated by differential centrifugation. NO metabolites, after enzymatic conversion followed by the Griess reaction, were measured as nitrite by spectrophotometric detection. Peroxynitrite (ONOO(-)) levels were evaluated using the fluorescence probe 2,7-dichlorofluorescein diacetate (DCFDA). MAIN OUTCOMEMEASURES:
The following determinations were made platelet nitric oxide and peroxynitrite levels in the SGA group and controls; inducible nitric oxide synthase (iNOS), endothelial nitric oxide synthase (eNOS) and nitrotyrosine (N-Tyr) expression in the same groups.RESULTS:
Our results show that both platelet NO and ONOO(-) levels were significantly higher in the SGA group than in the controls.CONCLUSION:
Increased platelets levels of nitric oxide and peroxynitrite might play a role in the pathophysiology of intrauterine growth restriction. Further investigations are in progress to clarify if these molecules are pathogenetic factors, an epiphenomenon or a pathophysiological marker.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Plaquetas
/
Ácido Peroxinitroso
/
Retardo do Crescimento Fetal
/
Óxido Nítrico
Tipo de estudo:
Etiology_studies
/
Observational_studies
Limite:
Adult
/
Female
/
Humans
/
Pregnancy
Idioma:
En
Revista:
BJOG
Assunto da revista:
GINECOLOGIA
/
OBSTETRICIA
Ano de publicação:
2008
Tipo de documento:
Article
País de afiliação:
Itália