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Abstract
Objectives. The aim of this study was to determine the maternal and umbilical cord serum levels of interleukin-8 (IL-8) in pregnancies complicated by preeclampsia with intrauterine normal growth and intrauterine growth retardation (IUGR), and in normotensive pregnancies.
Patients and methods. The study was carried out on 15 patients with singleton pregnancies complicated by preeclampsia with appropriate for gestational age weight infants and 12 pregnant patients with preeclampsia complicated by IUGR. The control group consisted of 10 healthy normotensive delivering patients with singleton uncomplicated pregnancies. Maternal and umbilical serum IL-8 concentrations were estimated using the ELISA method.
Results. There were no statistically significant differences in patient profiles between the groups. Systolic and diastolic blood pressure and mean arterial blood pressure were higher in the study groups in comparison with the control group. Lower birth weight and lower gestational age at birth were observed in the group of patients with preeclampsia complicated by IUGR. Increased maternal and umbilical serum levels of IL-8 were found in both preeclamptic patient groups in comparison with the control group. The umbilical cord blood concentrations of IL-8 in all groups of patients tended to be higher in comparison with the maternal blood.
Conclusions. It seems that these higher IL-8 concentrations may be associated with apoptosis, inflammation, neutrophil activation, endothelial cell damage and dysfunction, and increased endothelial permeability. They may also participate in an attempt to compensate for the imbalanced apoptosis and vascular resistance. Our findings suggest a possible significant role of IL-8 in the pathogenesis and sequelae of preeclampsia, especially in preeclamptic pregnancies complicated by IUGR.