University of Manchester researchers discovered a major blood vessel defect in preeclampsia patients, revealing up to a 75% reduction in calcium spark signaling that prevents maternal arterial relaxation. Testing showed the immune peptide HBD2 can relax these vessels via an alternative pathway, offering prospective therapeutic targets. Meanwhile, a 20-year University of Oxford cohort study established that preeclampsia patients with abnormal blood pressure 6 weeks postpartum face a twofold higher long-term cardiovascular disease risk.
Identification of blood vessel defects
- ▪Microscopic calcium bursts known as calcium sparks were reduced by up to 75% at normal physiological pressures in the blood vessels of preeclampsia patients, impairing arterial relaxation.
- ▪Small artery research led by Professor Adam Greenstein at the University of Manchester revealed that vessel cells in preeclampsia patients have depleted calcium stores that cannot properly refill.
- ▪University of Manchester researchers evaluated small omentum arteries from pregnant women with and without preeclampsia at Saint Mary's Hospital to investigate arterial relaxation mechanisms under laboratory pressure.
- ▪Researchers at the University of Manchester and Manchester University NHS Foundation Trust identified a blood vessel defect in women with preeclampsia, according to a study published in Circulation Research in October 2026.
Therapeutic potential of alternative pathways
- ▪University of Manchester scientists demonstrated that the natural immune peptide HBD2 relaxed blood vessels from preeclampsia patients by activating an alternative cellular pathway despite faulty calcium spark signaling.
- ▪Study lead author Dr. Stephanie Worton stated that targeting alternative vessel relaxation pathways could enable blood pressure control therapies during pregnancy to reduce premature deliveries.
Preeclampsia impact and Care
- ▪The Manchester Antenatal Vascular Service clinic provides specialist care for more than 300 women per year whose pregnancies are complicated by preterm preeclampsia.
- ▪Preeclampsia affects between 2% and 8% of pregnancies worldwide, causing complications such as stroke, organ damage, premature birth, and stillbirth, with delivery of the baby and placenta being the only definitive cure.
Postpartum blood pressure monitoring gaps
- ▪A University of Oxford study published in BJOG on October 16, 2026, analyzed 39,934 women with hypertensive disorders of pregnancy between 2000 and 2020, finding 22,100 lacked 6-week postpartum blood pressure records.
- ▪University of Oxford researchers noted that missed postpartum blood pressure monitoring in primary care is especially prevalent among multiparous women, individuals in deprived areas, and smokers.
Postpartum cardiovascular disease risk
- ▪A University of Oxford study led by Diane Korb found women with abnormal blood pressure at 6 weeks postpartum faced higher long-term cardiovascular risk: aHR 1.96 for hypertensive pregnancy disorders and aHR 2.00 for preeclampsia over a 20-year follow-up.
- ▪In the University of Oxford study of women with hypertensive pregnancy disorders, about 68% of the 1,167 women who experienced a cardiovascular disease event were younger than 40 years.
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