Abstract
Objective:
To assess the effect of infant size as a marker of placental function on the association between preeclampsia and the ratio of soluble fms-like tyrosine kinase 1 (sFlt-1) to placental growth factor (PlGF).
Study design:
The angiogenic factors sFlt-1 and PlGF were measured prospectively at 26 weeks gestation in 2322 women. Pregnancies were stratified by whether or not they were complicated by preeclampsia, the timing of delivery, and birthweight Z-score.
Result:
Independent of preeclampsia status, women with small infants (Z < -1.0) have an increased sFlt-1/PlGF ratio, and women with large infants (Z > 1.0) have a decreased ratio. Among pregnancies yielding small infants, the sFlt-1/PlGF ratio is markedly elevated in preeclamptic pregnancies requiring delivery before 37 weeks (110.0 vs. 17.9, p < 0.0001) but not in preeclamptic pregnancies delivered at term. The strength of the association between preeclampsia and the sFlt-1/PlGF ratio is increased for small infants compared to normal-sized or large infants.
Conclusion:
The sFlt-1/PlGF ratio in the late second trimester is similarly elevated in women with preeclampsia and in women with small infant size and more markedly elevated in a syndrome of placental dysfunction characterized by preeclampsia, preterm delivery, and growth restriction.
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Acknowledgements
This research was supported by an unrestricted grant from Abbott Diagnostics Division (9MZ-04-06N03).
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Honigberg, M.C., Seely, E.W., Thomas, A.M. et al. Infant size and the association between maternal circulating angiogenic factors and preeclampsia. J Perinatol 38, 456–461 (2018). https://doi.org/10.1038/s41372-018-0074-2
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DOI: https://doi.org/10.1038/s41372-018-0074-2
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