Abstract
Understanding of the maternal syndrome of pre-eclampsia has greatly improved over the past 5 years. Specifically, the notion has emerged that the placenta is a source of antiangiogenic factors, such as soluble fms-like tyrosine kinase 1, that can progressively impair the mother's vascular and glomerular function throughout pregnancy. This impairment can be harmless during normal pregnancy, but in cases of defective placentation, concentrations of antiangiogenic factors increase to a level that compromises vital vascular functions in the short term and jeopardizes long-term maternal and fetal outcomes. In both pre-eclamptic and healthy pregnancies, the transient imbalance between angiogenic and antiangiogenic factors elicited by pregnancy acts as a 'stress test' for the endothelium, particularly in the glomerular capillary bed. Women who do not pass this test (i.e. those who develop pre-eclampsia or gestational hypertension) should be screened for glomerular disease, and their cardiovascular risk should be carefully monitored throughout life.
Key Points
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During the final weeks of pregnancy, secretion by the placenta of soluble fms-like tyrosine kinase 1, an inhibitor of vascular endothelial growth factor, increases, and circulating levels of vascular endothelial growth factor decrease
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Since vascular endothelial growth factor is critical for maintenance of the glomerular environment, the third trimester acts as a 'stress test' for the glomeruli, and glomerular endotheliosis is common at this stage
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Pregnancy-induced hypertension and pre-eclampsia are linked to early, excessive secretion of soluble fms-like tyrosine kinase 1 and endoglin, another antiangiogenic factor
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Women with complicated pregnancies should be routinely screened for chronic hypertension and/or glomerulopathy (i.e. albuminuria) 8 weeks after giving birth
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Follow-up of women with pre-eclampsia should continue for the long term and aim to minimize cardiovascular risk factors (e.g. with lifestyle advice)
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In cases of severe pre-eclampsia, screening for thrombophilia and antinuclear antibodies might be advisable
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Hertig, A., Watnick, S., Strevens, H. et al. How should women with pre-eclampsia be followed up? New insights from mechanistic studies. Nat Rev Nephrol 4, 503–509 (2008). https://doi.org/10.1038/ncpneph0880
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DOI: https://doi.org/10.1038/ncpneph0880
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