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Full-Text Articles in Medicine and Health Sciences
Effect Of Hydrogen Peroxide On Prostaglandin Production And Contractions Of The Pregnant Rat Uterus, P. Cherouny, R. Ghodgaonkar, Jennifer Niebyl, N. Dubin
Effect Of Hydrogen Peroxide On Prostaglandin Production And Contractions Of The Pregnant Rat Uterus, P. Cherouny, R. Ghodgaonkar, Jennifer Niebyl, N. Dubin
Jennifer R Niebyl
Although evidence for a role for prostaglandins in parturition is abundant, less is known about how prostaglandin levels are regulated at term. Conditions occurring peripartum in the uteroplacental unit can result in reactive oxygen production. We investigated the effect of one reactive oxygen product, hydrogen peroxide, on in vitro activity of uterine segments from the 18-day-pregnant rat. H2O2 (0.3 mmol/L) was found to elicit rhythmic contractions and increase prostaglandins F2 alpha and E2 release by uterine tissue. Indomethacin blocked both of these effects. We conclude that H2O2 stimulates uterine contractions through a prostaglandin release mechanism. A speculative hypothesis of peripartum …
Drugs For Inhibition Of Premature Labor, Jennifer Niebyl
Drugs For Inhibition Of Premature Labor, Jennifer Niebyl
Jennifer R Niebyl
Effective inhibition of premature labor depends on prompt initiation of treatment. The author discusses factors initiating parturition, and the benefits and risks for mother and child of administration of alcohol, beta adrenergic agents, magnesium sulfate, and other agents that may counteract them.
The Pharmacologic Inhibition Of Premature Labor, Jennifer Niebyl, D. Blake, J. Johnson, T. King
The Pharmacologic Inhibition Of Premature Labor, Jennifer Niebyl, D. Blake, J. Johnson, T. King
Jennifer R Niebyl
Oxytocin, elevated estrogen-progesterone ratio, fetal corticosteroids, prostaglandins, catecholamines, and changes in uterine blood flow have all been implicated as triggers of labor. In approximately one-third of cases of threatened premature labor contractions stop spontaneously. Thus placebo-controlled randomized trials of any new drug for inhibition of premature labor are necessary, as the spontaneous cessation of contractions always favors the claimed therapeutic efficacy. Alcohol inhibits the release of endogenous oxytocin and has an additional direct effect on the myometrium. In one study alcohol was more effective than placebo in the postponement of delivery. Isoxsuprine, ritodrine, and terbutaline have also been shown to …
Preterm Parturition. Prostaglandin Synthetase Inhibitors, Jennifer Niebyl
Preterm Parturition. Prostaglandin Synthetase Inhibitors, Jennifer Niebyl
Jennifer R Niebyl
No abstract provided.
Encapsulated Beta-Islet Cells As A Bioartificial Pancreas To Treat Insulin-Dependent Diabetes During Pregnancy, Stephen Hunter, Y. Wang, C. Weiner, Jennifer Niebyl
Encapsulated Beta-Islet Cells As A Bioartificial Pancreas To Treat Insulin-Dependent Diabetes During Pregnancy, Stephen Hunter, Y. Wang, C. Weiner, Jennifer Niebyl
Jennifer R Niebyl
OBJECTIVE: Our purpose was to determine the effectiveness of the bioartificial pancreas technique in correcting (1) maternal carbohydrate metabolism and (2) fetal malformation rates in a pregnant diabetic animal model. STUDY DESIGN: Insulin secretion from encapsulated rat islets cultured in the presence of homologous rat prolactin was determined and compared with that of controls. Streptozotocin-induced diabetic Balb/c mice were then transplanted with rat islet cells encapsulated within alginate microbeads and were then bred. Blood glucose determinations were made after transplantation and throughout gestation. Pups were delivered by cesarean section on day 19 of gestation. Outcome parameters from the transplanted study …