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Association between increased FVIIa-antithrombin complex/FVIIa ratio and pre-eclampsia
Luca Spiezia1, Silvia Visentin, Claudia Radu
1Department of Cardiologic, Thoracic, and Vascular Sciences, University of Padua Medical School, Padua, Italy.
Summary
Activated factor VII-antithrombin (FVIIa-AT) complexes are elevated in normal pregnancy compared to non-pregnant women. The FVIIa-AT/FVIIa ratio is notably higher in pre-eclampsia (PE) patients than in normal pregnancy.
Area of Science:
- Coagulation cascade and hemostasis research.
- Reproductive medicine and maternal health.
- Biomarker discovery for pregnancy complications.
Background:
- Activated factor VII-antithrombin (FVIIa-AT) complexes serve as indicators of intravascular tissue factor (TF) exposure.
- Understanding hemostatic changes during pregnancy is crucial for maternal health.
- Pre-eclampsia (PE) is a significant pregnancy complication with potential thrombotic implications.
Purpose of the Study:
- To evaluate plasma levels of FVIIa-AT complexes during normal pregnancy.
- To compare FVIIa-AT levels in women with pre-eclampsia (PE) against normal pregnancy.
- To investigate the FVIIa-AT/FVIIa ratio in PE and normal pregnancy.
Main Methods:
- A case-control study involving 105 pregnant women.
- Participants were grouped by trimester (T1, T2, T3) and pre-eclampsia (PE).
- FVIIa-AT complexes were quantified using a specific ELISA assay.
Main Results:
- FVIIa-AT complexes were significantly higher in pregnant women (119 ± 24 pM) compared to non-pregnant controls (102 ± 12 pM).
- No significant difference in FVIIa-AT levels was found between the third trimester (T3) and PE groups.
- The FVIIa-AT/FVIIa ratio was significantly elevated in PE patients (2.01 ± 0.44) versus T3 women (1.50 ± 0.29).
Conclusions:
- Plasma levels of FVIIa-AT complexes show significant differences between normal pregnancy and non-pregnant states.
- The FVIIa-AT/FVIIa ratio is a potential indicator, being higher in pre-eclampsia patients compared to normal pregnant women.
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