Maternal plasma levels of cytokines in normal and preeclamptic pregnancies and their relationship with diastolic blood pressure and fibronectin levels

Background. To determine the plasma concentrations of placental growth factor (PLGF), vascular endothelial growth factor (VEGF), transforming growth factor‐β1 (TGF‐β1), soluble tumor necrosis factor α receptor (sTNFp55), interleukin‐2 receptor (IL‐2R), and interleukins 6 and 10 (IL‐6, IL‐10) in normotensive and preeclamptic women, and to evaluate the correlations between these cytokines and the diastolic blood pressure and fibronectin levels. Methods. A prospective case–control study. Thirty‐five women with preeclampsia were compared with 34 healthy women with uncomplicated pregnancies. Peripheral venous blood samples were obtained and plasma levels of PLGF, VEGF, TGF‐β1, sTNFp55, IL‐2R, IL‐6 and IL‐10 were measured by an enzyme‐linked immunoassay and fibronectin by a radial immundiffusion technic. Results. In preeclampsia PLGF and VEGF levels were significantly lower, and TGF‐β1, sTNFp55, IL‐2R, IL‐6 and IL‐10 levels were significantly higher than in normotensive pregnancy (p