Prostaglandin production and stimulation by angiotensin II in the isolated perfused human placental cotyledon

D. G. Glance, M. G. Elder, Leslie Myatt

Research output: Contribution to journalArticle

73 Citations (Scopus)

Abstract

Levels of prostaglandins E and F, thromboxane B2, and 6-oxo-prostaglandin F were measured by radioimmunoassay in the maternal and fetal effluents of isolated human placental cotyledons perfused in vitro. All prostaglandins measured were released in greater amounts by the maternal side than by the fetal side of the perfused cotyledon although there were no consistent concentration gradients between the two sides. The approximate rank order of prostaglandin release into the maternal side was thromboxane B2 > prostaglandin F {reversed tilde equals} prostaglandin E {reversed tilde equals}- 6-oxo-prostaglandin F, and that into the fetal side was thromboxane B2 {reversed tilde equals} prostaglandin F {reversed tilde equals} prostaglandin E {reversed tilde equals} 6-oxo-prostaglandin F. Injection of angiotensin II (0.5 μg) into the fetal circulation stimulated prostaglandin E and 6-oxo-prostaglandin F but not thromboxane B2 and prostaglandin F release into the fetal circulation and had no effect on maternal release. Angiotensin II (0.5 μg) had no effect on either side of the perfused cotyledon when injected into the maternal circulation. It is proposed that prostaglandin release into both maternal and fetal circulations may be flow-dependent and that the angiotensin II-stimulated release of prostaglandin E and 6-oxo-prostaglandin F may serve to modulate the vasoactive actions of angiotensin II on the fetal vasculature.

Original languageEnglish (US)
Pages (from-to)387-391
Number of pages5
JournalAmerican Journal of Obstetrics and Gynecology
Volume151
Issue number3
DOIs
StatePublished - Feb 1 1985
Externally publishedYes

Fingerprint

Cotyledon
Angiotensin II
Prostaglandins
Prostaglandins E
Thromboxane B2
Dinoprost
Mothers
Radioimmunoassay
prostaglandin F1
Injections

Keywords

  • angiotensin II
  • Placenta
  • prostaglandin production

ASJC Scopus subject areas

  • Medicine(all)
  • Obstetrics and Gynecology

Cite this

Prostaglandin production and stimulation by angiotensin II in the isolated perfused human placental cotyledon. / Glance, D. G.; Elder, M. G.; Myatt, Leslie.

In: American Journal of Obstetrics and Gynecology, Vol. 151, No. 3, 01.02.1985, p. 387-391.

Research output: Contribution to journalArticle

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AB - Levels of prostaglandins E and F2α, thromboxane B2, and 6-oxo-prostaglandin F1α were measured by radioimmunoassay in the maternal and fetal effluents of isolated human placental cotyledons perfused in vitro. All prostaglandins measured were released in greater amounts by the maternal side than by the fetal side of the perfused cotyledon although there were no consistent concentration gradients between the two sides. The approximate rank order of prostaglandin release into the maternal side was thromboxane B2 > prostaglandin F2α {reversed tilde equals} prostaglandin E {reversed tilde equals}- 6-oxo-prostaglandin F1α, and that into the fetal side was thromboxane B2 {reversed tilde equals} prostaglandin F2α {reversed tilde equals} prostaglandin E {reversed tilde equals} 6-oxo-prostaglandin F1α. Injection of angiotensin II (0.5 μg) into the fetal circulation stimulated prostaglandin E and 6-oxo-prostaglandin F1α but not thromboxane B2 and prostaglandin F2α release into the fetal circulation and had no effect on maternal release. Angiotensin II (0.5 μg) had no effect on either side of the perfused cotyledon when injected into the maternal circulation. It is proposed that prostaglandin release into both maternal and fetal circulations may be flow-dependent and that the angiotensin II-stimulated release of prostaglandin E and 6-oxo-prostaglandin F1α may serve to modulate the vasoactive actions of angiotensin II on the fetal vasculature.

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