scholarly journals Effect of Low-Dose Aspirin on Soluble FMS-Like Tyrosine Kinase 1/Placental Growth Factor (sFlt-1/PlGF Ratio) in Pregnancies at High Risk for the Development of Preeclampsia

2019 ◽  
Vol 8 (9) ◽  
pp. 1429 ◽  
Author(s):  
Karoline Mayer-Pickel ◽  
Vassiliki Kolovetsiou-Kreiner ◽  
Christina Stern ◽  
Julia Münzker ◽  
Katharina Eberhard ◽  
...  
Keyword(s):  
Growth Factor ◽  
High Risk ◽  
Tyrosine Kinase ◽  
Serum Levels ◽  
First Trimester ◽  
Placental Growth Factor ◽  
Chronic Hypertension ◽  
First Trimester Screening ◽  
Trimester Screening ◽  
Plgf Ratio

Background: Soluble FMS-like Tyrosine Kinase 1 (sFlt-1) and placental growth factor (PlGF) have been reported to be highly predictive several weeks before the onset of preeclampsia. Objective: To investigate longitudinal changes of serum levels sFlt-1 and PlGF in pregnant women at high risk for the development of preeclampsia and to reveal an impact of aspirin on maternal serum concentrations of sFlt-1 and PlGF. Methods: This was a prospective longitudinal study in 394 women with various risk factors for the development of preeclampsia (chronic hypertension, antiphospholipid syndrome/APS or systemic lupus erythematosus/SLE, thrombophilia, women with a history of preeclampsia, pathologic first trimester screening for preeclampsia) and 68 healthy women. Serum levels of sFlt-1 and PlGF were measured prospectively at 4-week intervals (from gestational weeks 12 until postpartum). Results: The sFlt-1/PlGF ratio was significantly higher in women with an adverse obstetric outcome compared to women with a normal pregnancy, starting between 20 and 24 weeks of gestation. There was no effect of aspirin on sFlt-1/PlGF ratio in women with chronic hypertension, APS/SLE, thrombophilia and controls. The use of aspirin showed a trend towards an improvement of the sFlt-1/PlGF ratio in women with preeclampsia in a previous pregnancy and a significant effect on the sFlt-1/PlGF ratio in women with a pathologic first trimester screening for preeclampsia. Conclusions: Our findings reveal an impact of aspirin on sFlt-1/PlGF ratio in women with a pathologic first trimester screening for preeclampsia, strongly supporting its prophylactic use.

Maternal serum placental growth factor and α -fetoprotein testing in first trimester screening for Down syndrome

2013 ◽  
Vol 33 (5) ◽  
pp. 457-461 ◽  
Author(s):  
Kim Donalson ◽  
Steve Turner ◽  
Lesley Morrison ◽  
Päivi Liitti ◽  
Christel Nilsson ◽  
...  
Keyword(s):  
Down Syndrome ◽  
Growth Factor ◽  
First Trimester ◽  
Maternal Serum ◽  
Placental Growth Factor ◽  
First Trimester Screening ◽  
Trimester Screening

First Trimester Screening for Fetal Aneuploidies Using Placental Growth Factor: The Great Obstetrical Syndrome (GOS) Study

2018 ◽  
Vol 40 (8) ◽  
pp. 1044-1049 ◽  
Author(s):  
Amélie Boutin ◽  
Suzanne Demers ◽  
Cédric Gasse ◽  
Yves Giguère ◽  
Amélie Tétu ◽  
...  
Keyword(s):  
Growth Factor ◽  
First Trimester ◽  
Placental Growth Factor ◽  
First Trimester Screening ◽  
Trimester Screening ◽  
Fetal Aneuploidies

Validation of Soluble Fms-Like Tyrosine Kinase-1 (sFlt-1) and Placental Growth Factor (PlGF) Assays on Cobas e602 System

2020 ◽  
Vol 154 (Supplement_1) ◽  
pp. S12-S13
Author(s):  
Nga Yeung Tang ◽  
Sarosh Rana ◽  
Kiang-Teck J Yeo
Keyword(s):  
Growth Factor ◽  
Tyrosine Kinase ◽  
Medical Center ◽  
Placental Growth Factor ◽  
Analytical Performance ◽  
Hypertensive Disorder ◽  
Limit Of Quantitation ◽  
Roche Diagnostics ◽  
Interference Studies ◽  
Plgf Ratio

Abstract Background Preeclampsia is a leading hypertensive disorder in pregnant women. The angiogenic biomarkers, soluble fms-like tyrosine kinase-1 (sFlt-1) and placental growth factor (PlGF) ratio, have been shown to be associated with diagnosis and prediction of preeclampsia. The objective of this study is to validate the analytical performance of sFlt-1 and PlGF on the Cobas e602 system (Roche Diagnostics Corporation). Method Intra-day and inter-day precisions for both sFlt-1 and PlGF assays were assessed using quality control materials provided from Roche Diagnostics. The accuracies for both assays were assessed by running 60 patient samples, which have been previously analyzed on the Elecsys 411 analyzer (Roche Diagnostics Corporation) at the Beth Israel Deaconess Medical Center. Linearity studies for both assays were performed using patient plasma spiked with recombinant sFlt-1 and PlGF proteins (R&D systems). Hemolysis, icterus, lipemia and biotin interference studies were performed by spiking hemolysate, bilirubin, intralipid or biotin into either pooled patient plasma with detectable levels of sFlt-1 and PlGF or otherwise, patient plasma spiked with recombinant sFlt-1 and PlGF proteins. Results Total precisions for both assays demonstrated CVs of <5.0%. The sFlt-1 and PlGF assays demonstrated analytical measuring ranges of 3060,000 pg/mL and 79,000 pg/mL, respectively (r2 > 0.98). Lower limit of quantitation (10% CV) was 30 pg/mL for sFlt-1 and 7 pg/mL for PlGF, respectively. Interference studies showed sFlt-1 and PlGF were not significantly affected by hemolysis up to H-indices of 500 and 1000 respectively; both assays were not affected by bilirubin up to an I-index of 60, and lipemia up to an L-index of 2800. Biotin at concentrations >30 ng/mL caused significant negative bias for both sFlt-1 and PlGF assays. Comparison studies showed the following: Cobas e602 sFLT-1 = 1.09 [Elecsys 411 sFLT-1] +203 (r2=0.97, Sy/x=1234, n=58); Cobas e602 PlGF = 1.10 [Elecsys 411 PlGF] +47 (r2=0.99, Sy/x=22.1, n=58); Cobas e602 sFLT-1/PlGF ratio = 0.94 [Elecsys 411 sFLT-1/PlGF ratio] +3.5 (r2=0.91, Sy/x=50, n=58). Conclusion sFlt-1 and PlGF measured on Roche Diagnostics Cobas e602 system demonstrated excellent analytical performance and are acceptable for clinical use once approved in the US.

scholarly journals Applying the concept of uncertainty to the sFlt-1/PlGF cut-offs for diagnosis and prognosis of preeclampsia

2021 ◽  
Vol 59 (4) ◽  
pp. 681-686
Author(s):  
Pacifique Lévy ◽  
Safouane Hamdi ◽  
Jean Guiboudenche ◽  
Marie Clothilde Haguet ◽  
Sophie Bailleul ◽  
...  
Keyword(s):  
Quality Control ◽  
Growth Factor ◽  
Tyrosine Kinase ◽  
Error Propagation ◽  
Placental Growth Factor ◽  
Internal Quality ◽  
Diagnosis And Prognosis ◽  
Diagnosis By Exclusion ◽  
Using Data ◽  
Plgf Ratio

Abstract Objectives Placental growth factor (PlGF) and soluble fms-like tyrosine kinase-1 (sFlt-1) assays and the corresponding ratios (sFlt-1/PlGF) have been proposed to aid in the diagnosis by exclusion and/or prognosis of preeclampsia (PE). A method for evaluating ratio uncertainties (RUs), based on the theory of error propagation, was applied to the sFlt-1/PlGF ratio. Methods RUs were calculated using data derived from sFlt-1 and PlGF Internal Quality Control (IQC) results collected from four centers using Elecsys (Roche) or Kryptor (Thermo Fisher) sFlt-1 and PlGF assays. The corresponding ratio uncertainties were defined for each ratio value. Results The RUs increased linearly with the sFlt-1/PlGF ratio values. The Elecsys RUs were lower than the Kryptor RUs. Although RUs cannot eliminate differences in ratio values observed among various immunoassays, it can affect interpretation of the sFlt-1/PlGF ratio, especially when results are within the range of predefined PE diagnosis or prognosis cut-offs. Conclusions Since RUs are only a function of PlGF and sFlt-1 precision, they can be calculated for each assay from each laboratory to adjust the interpretation of sFlt-1/PlGF ratio results in the context of PE.

scholarly journals Maternal Serum Placental Growth Factor, Soluble Fms-Like Tyrosine Kinase-1, and Soluble Endoglin in Twin Gestations and the Risk of Preeclampsia—A Systematic Review

2020 ◽  
Vol 9 (1) ◽  
pp. 183 ◽  
Author(s):  
Katarzyna Kosinska-Kaczynska ◽  
Magdalena Zgliczynska ◽  
Szymon Kozlowski ◽  
Lukasz Wicherek
Keyword(s):  
Growth Factor ◽  
Tyrosine Kinase ◽  
Serum Levels ◽  
Maternal Serum ◽  
Placental Growth Factor ◽  
Cochrane Library ◽  
Original Research ◽  
Multiple Gestation ◽  
Soluble Endoglin ◽  
Twin Pregnancies

Multiple gestation is one of the key risk factors for the occurrence of preeclampsia (PE). Soluble fms-like tyrosine kinase-1, placental growth factor, and soluble endoglin are molecules involved in the process of angiogenesis with a proven role in the pathogenesis of PE. The aim of the review was to summarize available data on maternal serum levels of the above-mentioned factors and their usefulness in predicting PE in twin pregnancies. Only original research articles written in English were considered eligible. Reviews, chapters, case studies, conference papers, experts’ opinions, editorials, and letters were excluded from the analysis. No publication date limitations were imposed. The systematic literature search using PubMed/MEDLINE, Scopus, Embase, and Cochrane Library databases identified 338 articles, 10 of which were included in the final qualitative analyses. The included studies showed significant differences in maternal serum levels of the discussed factors between women with twin pregnancies with PE and those who did not develop PE, and their promising performance in predicting PE, alone or in combination with other factors. The identification of the most effective algorithms, their prompt introduction to the clinical practice, and further assessment of the real-life performance should become a priority.

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