Abstract
The angiogenic factors soluble fms-like tyrosine kinase-1 (sFlt-1) and placental growth factor (PlGF) are significantly altered in preeclampsia with elevated sFlt-1 levels and low PlGF in the continuation of pregnancies. Furthermore, patients with preeclampsia reveal significantly low PlGF levels in the first trimester. We performed a retrospective study including 161 patients during the first trimester screening between 11+0 and 13+6 weeks of gestation. In addition, we analyzed sFlt-1 und PlGF in maternal serum with a Roche Elecsys(®) System. The mean values for sFlt-1 were 1 247,11±545,84 pg/ml and 47,00±22,62 pg/ml for PlGF. There is a positive correlation between sFlt-1 and PAPP-A MoM (rS=0,681, p<0,001), and PlGF and PAPP-A MoM (rS=0,465, p<0,001), respectively. There was a negative correlation between sFlt-1 and maternal body mass index (rS=-0,225, p=0,005). Overweight patients had significantly lower sFlt-1 values than patients with normal weight (p=0,003). PlGF and the crown-rump-length of the fetus showed a positive correlation (rS=0,27, p<0,001), whereas PlGF and the Pulsatility Index of the uterine arteries were negative correlated (rS=-0,235; p=0,012). Patients with a preexistent diabetes mellitus had significantly low sFlt-1 und PlGF (p<0,05) values. Smokers had significantly elevated PlGF-values (p<0,001). sFlt-1 and PlGF are influenced by various factors during the first trimester of pregnancy which can be relevant for correct interpretation. Further prospective studies may be necessary to validate our results. The aim should be to establish sFlt-1 and PlGF MoM values to allow for integration into a screening for preeclampsia in the first trimester.
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