AI Article Synopsis
- The study investigates how certain antihypertensive medications used to treat preeclampsia affect endothelin-1 (ET-1) induced contractions in human uterine arteries.
- Only dihydropyridines among the tested antihypertensive drugs were effective in partially blocking the contractile response to ET-1, while others had no impact.
- The research concludes that existing treatments do not fully reverse ET-1 induced contractions, suggesting a potential role for dihydropyridines in improving placental blood flow.
Article Abstract
Background: Reduced uteroplacental perfusion, the initiating event in preeclampsia, is associated with enhanced endothelin-1 (ET-1) production which feeds the vasoconstriction of uterine artery. Whether the treatments of preeclampsia were effective on ET-1 induced contraction and could reverse placental ischemia is the question addressed in this study. We investigated the effect of antihypertensive drugs used in preeclampsia and of ET receptor antagonists on the contractile response to ET-1 on human uterine arteries.
Methodology/principal Findings: Experiments were performed, ex vivo, on human uterine artery samples obtained after hysterectomy. We studied variations in isometric tension of arterial rings in response to the vasoconstrictor ET-1 and evaluated the effects of various vasodilators and ET-receptor antagonists on this response. Among antihypertensive drugs, only dihydropyridines were effective in blocking and reversing the ET-1 contractile response. Their efficiency, independent of the concentration of ET-1, was only partial. Hydralazine, alpha-methyldopa and labetalol had no effect on ET-1 induced contraction which is mediated by both ET(A) and ET(B) receptors in uterine artery. ET receptors antagonists, BQ-123 and BQ-788, slightly reduced the amplitude of the response to ET-1. Combination of both antagonists was more efficient, but it was not possible to reverse the maximal ET-1-induced contraction with antagonists used alone or in combination.
Conclusion: Pharmacological drugs currently used in the context of preeclampsia, do not reverse ET-1 induced contraction. Only dihydropyridines, which partially relax uterine artery previously contracted with ET-1, might offer interesting perspectives to improve placental perfusion.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3027698 | PMC |
| http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0016540 | PLOS |
Publication Analysis
Top Keywords
Similar Publications
Uterine artery embolization plus ultrasound guided curettage for cesarean scar pregnancy: Five-year experience at a single tertiary hospital.
Taiwan J Obstet Gynecol
January 2025
Department of Gynecology & Obstetrics, Beijing friendship hospital, Capital Medical University, No. 95, Yong'an Road, Xi-cheng district, Beijing, China. Electronic address:
Objective: To study immediate therapeutic outcomes, subsequent fertility effects and menstrual changes in cesarean scar pregnancy patients who received uterine artery embolization with or without methotrexate followed by ultrasound guided curettage.
Materials And Methods: Totally, 82 patients who met the inclusion criteria were enrolled in our study and divided into two groups. Group I included 50 patients who received uterine artery embolization and ultrasound guided curettage, and Group II had 32 patients who received uterine artery embolization plus methotrexate and ultrasound guided curettage.
Prognosis for fetuses with isolated severe growth retardation from 23 gestational weeks with an initial assessment unfavorable to an active management.
J Gynecol Obstet Hum Reprod
January 2025
Maternite´ Port-Royal, AP-HP, APHP, Centre-Universite´ de Paris, FHU PREMA, 123, Bd de Port-Royal, 75014 Paris, France.
Objective: To study perinatal outcomes for newborns with early, isolated, severe FGR, for whom initial active management was considered unreasonable or impossible at an obstetric-pediatric assessment and to identify the determinants associated with a course that made active management reasonable.
Material And Methods: This retrospective observational single-center study occurred in a level-3 university hospital maternity unit. It included all pregnancies with a singleton fetus presenting isolated FGR <3rd percentile at 23 weeks or more of gestation with an obstetric-pediatric assessment (OPA) initially unfavorable to active management.
Effect of phenylephrine infusion on postpartum blood loss after cesarean delivery: A Placebo-controlled, randomized clinical trial.
Am J Obstet Gynecol MFM
January 2025
Department of Anaesthesiology and Critical Care, Jawaharlal Institute of Post Graduate Medical Education and Research, Puducherry, India. Electronic address:
Background: Preclinical studies have documented the role of alpha-adrenergic agonists in myometrial contraction. Phenylephrine is frequently used to prevent and treat post-spinal hypotension during cesarean delivery. We hypothesized phenylephrine would reduce postpartum blood loss due to alpha-1 receptor-mediated uterine and vascular smooth muscle contraction.
View Article and Find Full Text PDFComparative efficacy of uterine artery embolization versus laparoscopic myomectomy in treating uterine fibroids: a propensity score matched analysis.
Discov Oncol
January 2025
Department of Interventional Radiology, The Second Affiliated Hospital of Soochow University, Suzhou, China.
Objective: The aim of this study was to comparatively analyze the therapeutic effects of uterine artery embolization (UAE) and laparoscopic myomectomy (LM) on uterine fibroids to determine which treatment method is more beneficial for patients.
Materials And Methods: A retrospective study was conducted on 396 patients who underwent UAE (n = 153) or LM (n = 243) treatment from April 2010 to September 2019. After 1:1 propensity score matching (PSM), a comparative analysis was conducted on surgical trauma magnitude, postoperative recovery time, improvement in associated symptoms and quality of life, surgical adverse events, recurrence rates, and further interventions.
The Interplay of Molecular Factors and Morphology in Human Placental Development and Implantation.
Biomedicines
December 2024
Department II of Microscopic Morphology, Victor Babes University of Medicine and Pharmacy Timisoara, E. Murgu Square, No. 2, 300041 Timisoara, Romania.
The placenta is a vital organ that supports fetal development by mediating nutrient and gas exchange, regulating immune tolerance, and maintaining hormonal balance. Its formation and function are tightly linked to the processes of embryo implantation and the establishment of a robust placental-uterine interface. Recent advances in molecular biology and histopathology have shed light on the key regulatory factors governing these processes, including trophoblast invasion, spiral artery remodeling, and the development of chorionic villi.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!