Is the spontaneous motility of isolated rat uterus controlled by prostaglandin E?

In: Prostaglandins · 1979 · vol. 17(5) , pp. 673–683 · doi:10.1016/s0090-6980(79)80040-4 · PMID:573914 · W2036478455
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This study investigated whether spontaneous uterine motility in isolated rat uteri is regulated by prostaglandin E.

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Abstract

Variations in the spontaneous contractile activity during 6 hours following isolation of uterine horns from proestrus, metestrus and spayed rats, were explored. In estrus and metestrus preparations the contractions declined during 60 min and between 180--200 min a progressive spontaneous recovery (abolished by indomethacin) was observed up to 360 min. Uteri from proestrus and spayed animals exhibited a continuous depression without recovery during the whole experimental period. At 60 min, uterine horns from estrus animals (which showed a marked contractile decrement) released to the suspending medium significantly less prostaglandin E-like material than at 360 min, i.e. when contractions had almost completely recovered. No modification in the amount of prostaglandin F-like material was detected accompanying these spontaneous contractile variations. In the spayed group at 60 min of functioning (i.e. when the contractile impairment was significantly smaller than at a later time) the release of PGE was greater than at 360 min. These findings suggest a possible control of rat uterine contractions by PGE, rather than by PGF.

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