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Updated: Jun 9, 2025
05:31
Author Spotlight: Modeling an Aspect of Preeclampsia in Female Mice Using Hypoxic Human Placenta-Derived Small Extracellular Vesicles
Published on: January 26, 2024
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Senescent Syncytiotrophoblast Secretion During Early Onset Preeclampsia
Olivia Nonn1,2,3,4,5, Olivia Debnath6, Daniela S Valdes1,2,3,4
1Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Germany (O.N., D.S.V., J.U., H.B., A.F., N.H., K.K., S.K., D.N.M., R.D., F.H.).
Hypertension (Dallas, Tex. : 1979)
|October 23, 2024
Summary
Preeclampsia is predicted by placental senescence markers, like PAI-1 and activin A, appearing in maternal blood weeks before symptoms. This discovery offers potential for early diagnosis of preeclampsia.
Area of Science:
- Reproductive biology
- Genomics
- Pathology
Background:
- Preeclampsia is a serious pregnancy complication causing preterm birth and long-term cardiovascular risks.
- Current early predictive tests and therapies for preeclampsia are limited.
- Understanding preeclampsia pathogenesis is crucial for maternal and fetal health.
Purpose of the Study:
- To identify novel biomarkers and signaling pathways for early-onset preeclampsia.
- To investigate the role of placental changes in preeclampsia development.
Main Methods:
- Single-nucleus RNA sequencing and spatial transcriptomics were used to profile maternal-fetal interface units.
- Placental tissues from early-onset preeclampsia and healthy controls were analyzed.
- Senescence markers and secreted factors were quantified in maternal blood.
Main Results:
- Transcriptomic analysis revealed dysregulated senescence in placental syncytiotrophoblast.
- Elevated senescence markers were confirmed in clinical preeclampsia cohorts.
- Specific senescence-associated secretory phenotype factors, PAI-1 and activin A, were elevated in first-trimester maternal blood, predicting preeclampsia.
Conclusions:
- Increased syncytiotrophoblast senescence precedes clinical preeclampsia manifestation by weeks.
- Premature placental senescence and associated secretory phenotype release contribute to preeclampsia.
- Senescence markers show promise as early diagnostic tools for preeclampsia.
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