PGH2, TxA2 and PGI2 have potent and differentiated actions on human uterine contractility
Abstract
The contractile response to three different prostanoids of the isolated human myometrium and the different layers of the uterotubal junction (UTJ) was studied in vitro. The prostaglandin endoperoxide, PGH2, stimulated contractility of both the myometrium and the outer and inner muscle layers of the UTJ, whereas the intermediate layer of the UTJ was inhibited. Thromboxane A2 generated from PGH2 and a thromboxane synthase preparation caused a stimulation of both the myometrium and all three layers of the UTJ. The stimulatory response to TxA2 occurred at concentrations as low as 50-70 pg/ml. The sodium salt of PGi2 was found to relax both the myometrium and all the layers of the UTJ. Intravenous administration of PGI2 in repeated doses between 2-8 microgram induced facial flushing and headache but had little if any effect on in vivo uterine contractility. At least under in vitro conditions, these short-lived prostanoids and/or their metabolites apparently have a specific action on uterine contractility, an action which is manifested at comparatively low concentrations.
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Hypoxia-induced COX-2 overexpression increases production of PGE2 and PGH2, leading to increased TXA2, a vasoconstrictor, platelet activator, and uterine contraction inducer.
“Note that hypoxia-induced COX-2 overexpression can increase the production of not only PGE2 but also PGH2, which leads to increased production of thromboxane A2 (TXA2), a vasoconstrictor, a potent platelet activator, and a potent inducer of uterine contraction [99].”
From The Pathogenesis of Adenomyosis vis-à-vis Endometriosis (2020) · cites this paper as [99]
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Wood, E. M., Hornaday, K. K., Newton, M., Wang, M., Wood, S. L., & Slater, D. M. (2025) · PLoS ONE · doi:10.1371/journal.pone.0315484
- Authors
- Wilhelmsson, L., Wikland, M., & Wiqvist, N.
- Affiliations
- University of Gothenburg (SE)
- Venue
- Prostaglandins
- Publisher
- Elsevier BV
- Published
- 1981-02
- Volume
- 21
- Issue
- 2
- Pages
- 277-286
- ISSN
- 0090-6980 (ISSN-L)
- OpenAlex
- W2080950545
- Cited by
- 77
- References
- 15
- Citations by year
- 2025: 1 · 2022: 1 · 2020: 1 · 2019: 1 · 2018: 1 · 2016: 3 · 2015: 1
- FWCI
- 7.41
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Prostaglandins (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Pharmacology › Inflammatory mediators and NSAID effects
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Eicosanoids and Hypertension Pharmacology
- Health Sciences › Medicine › Epidemiology › Preterm Birth and Chorioamnionitis
- Keywords
- prostaglandin F2alpha, thromboxane A2, prostacyclin, uterine contractility, human myometrium, uterotubal junction, prostaglandin endoperoxides, thromboxane synthase, prostaglandin metabolites, uterine relaxation
- MeSH terms
- Adult, Dose-Response Relationship, Drug, Female, Humans, Myometrium, Pregnancy, Prostaglandin Endoperoxides, Prostaglandins, Prostaglandins H, Epoprostenol, Thromboxane A2, Thromboxanes, Uterine Contraction, Uterus, In Vitro Techniques
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