Gestational and Hormonal Effects on Magnesium Sulfate’s Ability to Inhibit Mouse Uterine Contractility

4Citations
Citations of this article
21Readers
Mendeley users who have this article in their library.
Get full text

Abstract

Magnesium sulfate is used as a tocolytic, but clinical efficacy has been seriously questioned. Our objective was to use controlled ex vivo conditions and known pregnancy stages, to investigate how 2 key factors, hormones and gestation, affect magnesium’s tocolytic ability. We hypothesized that these factors could underlie the varying clinical findings around magnesium’s efficacy. Myometrial strips were obtained from nonpregnant (n = 10), mid-pregnant (n = 12), and term-pregnant (n = 11) mouse uterus. The strips were mounted in organ baths superfused with oxygenated physiological saline at pH 7.4 and 37 °C. The effect of different concentrations of MgSO4 (2-20 mM) was examined on spontaneous and oxytocin-induced (0.5-1 nM) contractions. Contractile properties (amplitude, frequency, and area under the curve) were measured before and after application of magnesium. Magnesium sulfate had a dose-dependent inhibitory effect on both spontaneous and oxytocin-induced contractions but was less effective in the presence of oxytocin. In spontaneous contractions, magnesium was more potent as gestation progressed (P

Cite

CITATION STYLE

APA

Osaghae, B. E., Arrowsmith, S., & Wray, S. (2020). Gestational and Hormonal Effects on Magnesium Sulfate’s Ability to Inhibit Mouse Uterine Contractility. Reproductive Sciences, 27(8), 1570–1579. https://doi.org/10.1007/s43032-020-00185-8

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free