Evaluation of tissue metalloproteinase inhibitor TIMP-1 and Survivin levels during third trimester pregnancy — a preliminary report
Abstract
Objectives: A proper implantation of trophoblastic cells and an appropriate metalloproteinases activity is required to cause disintegration of basal membranes of cells. The activity of tissue matrix metaloproteinases can be inhibited by their matrix inhibitors — TIMP-s. Survivin is a member of inhibitor of apoptosis proteins family (IAP), that suppresses caspase activation, influences VEGF expression and promotes proliferative action of endothelial cells.
Material and methods: The aim of the study was to assess concentrations of two independent anti-apoptotic factors. TIMP-1 and survivin in serum of women in their third trimester of pregnancy and in umbilical cord blood of neonates – drawn separately from veins and arteries. The study group consisted of 29 pregnant women in physiological pregnancy and with correct fetal development, in gestational age between 37 to 40 weeks of gestation. Blood used in the study was collected from maternal cubital fossa veins and from neonatal umbilical cords (from veins and from arteries separately). The research was conducted using TIMP-1 and Survivin ELISA kits from R & D Systems according to manufacturers’ recommendations and protocols.
Results: The concentrations of TIMP-1 were similar and independent of the source of blood samples. Arterial values of TIMP-1 in umbilical cord compared to maternal and fetal veins were slightly lower, but no statistical difference was found. The mean concentrations of Survivin were comparable but we found that in some cases the results in cord blood serum in both vessels-vein and arteries were almost negative. Arterial values of Survivin in umbilical cord compared to maternal blood were higher, but no statistical difference was found.
Conclusions: In III-rd trimester of pregnancy parameters of Timp-1 and Survivin — anti-apoptotic substances concentration were similar in maternal and cord blood in both artery and vein. We found no increased activity of selected antiapoptotic factors.
Keywords: pregnancyumbilical cord bloodTIMP-1Survivin
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