Investigating blood vessel changes during pregnancy
Official title: Angiotensin 2 Receptor (AT2R) Expression/Activation in Endothelial Cells in Preeclampsia
Run by University of Wisconsin, Madison · NCT03806283 · Data updated 2026-11-12
This study is trying to see how blood vessels change during pregnancy in women with and without preeclampsia by looking at tissue samples taken during cesarean sections.
Quick facts
| Study type | Observational |
|---|---|
| Ages | 18 Years to 40 Years |
| Sex | Women only |
| Enrollment | 166 (estimated) |
| Sponsor | University of Wisconsin, Madison Academic / other |
| Locations | 1 site (Madison, Wisconsin) |
| Status | Recruiting |
| Started | November 20, 2018 |
| Main results expected | April 2027 |
| Study ends | April 2027 |
| Registry record updated | January 20, 2026 |
| Trial ID | NCT03806283 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates for this study are pregnant women aged 18 to 40, undergoing a cesarean section, and diagnosed with or without preeclampsia.
✕Probably not a fit
Patients with preexisting hypertension, major fetal anomalies, or other significant underlying health conditions may not benefit from this study.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This observational study aims to compare the vascular adaptations in pregnant women with and without preeclampsia by collecting omental and placental tissue during cesarean sections. The research will focus on the expression and activation of the AT2 receptor and its role in vascular function and dysfunction. A total of up to 114 pregnant women will be enrolled, with the option to provide one or both types of tissue specimens. The study will analyze the collected samples to understand fetal vascular dysfunction associated with preeclampsia.
Why it matters
Potential benefit: If successful, this study could lead to improved understanding and management of preeclampsia, potentially enhancing maternal and fetal health outcomes.
How similar studies have gone: While this study explores specific mechanisms in preeclampsia, similar studies have shown promise in understanding vascular adaptations during pregnancy.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Female * Ages 18 to 40 years old * Singleton gestation between 28 weeks, 0 days and 41 weeks, 0 days gestational age at the time of consent * Undergoing caesarean section, either planned or otherwise with or without trial of labor Exclusion Criteria: * Treatment of severe hypertension by antihypertensive or use of magnesium sulfate after the patient is hospitalized for the diagnosis of preeclampsia. * Any major fetal structural anomalies or aneuploidies * Undergoing cesarean section for placental abruption or bleeding complications. * Singleton gestation not within 36 weeks, 0 days and 41 weeks, 0 days gestational age at the time of enrollment (delivery)
Where it's running
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UnityPoint Health-Meriter Hospital
Madison, Wisconsin, United States Recruiting
Study contacts
- Principal investigator: Sathish Kumar, PhD — University of Wisconsin, Madison
- Study coordinator: UW Ob/Gyn Human Subjects Core
- Email: research.crc_obgyn@wisc.edu
- Phone: 608-890-3345
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
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Pre-eclampsia risk in pregnancies after oocyte donation
We will follow pregnant women who used donated eggs and women who used their own eggs to see if pregnancies after oocyte donation lead to a higher risk of pre-eclampsia.
-
Use of metformin to prolong pregnancy in preterm preeclampsia in the Netherlands
In pregnant people with preterm preeclampsia, this study tests whether metformin can help them stay pregnant longer compared with placebo.
-
Using low-dose aspirin after preeclampsia to improve recovery
This study is testing if taking low-dose aspirin for six months after having preeclampsia can help new moms recover better by improving their blood pressure and blood vessel function.
-
Inhaled mosliciguat for pulmonary hypertension in interstitial lung disease (PH-ILD) patients
This study tests inhaled mosliciguat versus placebo in people with PH-ILD to see if it helps with their condition.
-
Preeclampsia Biomarker Test in African Women
This study tests whether measuring the sFlt-1/PlGF ratio using quick clinic tests helps predict which pregnant women in Africa will develop severe preeclampsia.
-
Internal jugular vein collapsibility to gauge volume status in preeclampsia vs. normal pregnancy
This study tests whether ultrasound of the internal jugular vein can show differences in fluid status between preeclamptic pregnant people and those with normal blood pressure during planned cesarean delivery.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.