Peer-Reviewed Journal Details
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Slattery, MM,O'Leary, MJ,Morrison, JJ
2001
March
American Journal Of Obstetrics And Gynecology
Effect of parathyroid hormone-related peptide on human and rat myometrial contractility in vitro
Published
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Optional Fields
parathyroid hormone-related peptide (fragment 1-34) human being rat myometrium uterine contractility PREGNANT HUMAN MYOMETRIUM HUMORAL HYPERCALCEMIA PROTEIN PTHRP HUMAN AMNION EXPRESSION RECEPTOR CALCIUM LABOR STIMULATION ASSOCIATION
184
625
629
OBJECTIVES: The aims of this study were primarily to investigate the effects of parathyroid hormone-related peptide (human fragment 1-34) on human nonpregnant and pregnant (nonlabor and labor) myometrial contractility in vitro and secondarily to compare these effects with those of parathyroid hormone-related peptide on rat myometrial contractility.STUDY DESIGN: Isometric tension recording was performed under physiologic conditions in isolated myometrial strips obtained at hysterectomy and cesarean delivery and from Sprague-Dawley rats. The effect of cumulative additions of parathyroid hormone-related peptide (1, 10, and 100 nmol/L) on myometrial contractility was measured and the significance of results was assessed by 2-way analysis of variance.RESULTS: Parathyroid hormone-related peptide exerted a statistically significant net relaxant effect on myometrial contractility in human nonpregnant myometrium (34.71%; P .05) the onset of labor, and in rat tissue (31.60%; P <.01).CONCLUSIONS: Parathyroid hormone-related peptide exerts a relaxant effect on human and rat myometrial tissue. In human myometrium, sensitivity to parathyroid hormone-related peptide is reduced in pregnancy and abolished by the onset of labor.
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