From the structure activity relationship, two new analogs, 2 and 3, of the potent progesterone antagonist mifepristone 1 have been designed. The syntheses of these two analogs have been achieved in eleven steps through modified synthetic sequences and improved procedures starting from (1)-estrone. In comparison with mifepristone 1, the relative binding affinities of compound 2 for the progester...

BACKGROUND Cyclic shedding of the endometrium is unique to menstruating species, and mouse menstruation models by physiologic progesterone withdrawal have been previously reported. Since progesterone action ablated pharmacologically may provide more insight into the mechanism of action, a mouse menstruation model using mifepristone was established. METHODS Mifepristone was administered follow...

BACKGROUND The use of fertility regulating drugs is limited among various socio-ethnic groups due to limited knowledge about their mechanism of action. This study investigates the effect of levonorgestrel and mifepristone on attachment of human embryos to an in vitro endometrial construct. METHOD Three-dimensional endometrial constructs were established by co-culturing early luteal phase huma...

An emergency contraceptive method is used after coitus but before pregnancy occurs. The use of emergency contraception is largely under-utilized worldwide. One of the main barriers to widespread use is concern about the mechanism of action. Recently, treatment with either 10 mg mifepristone or 1.5 mg of levonorgestrel has emerged as the most effective hormonal method for emergency contraception...

BACKGROUND From 2001 to March 2006, Planned Parenthood Federation of America (Planned Parenthood) health centers throughout the United States provided medical abortions principally by a regimen of oral mifepristone, followed 24-48 h later by vaginal misoprostol. In late March 2006, analyses of serious uterine infections following medical abortions led Planned Parenthood to change the route of m...

OBJECTIVES The aim of this study was to evaluate the safety and improvement in quality of life using 10 mg and 5 mg daily doses of mifepristone for the treatment of uterine fibroids. DESIGN The research was a randomized double-blind clinical study undertaken at the Eusebio Hernández Hospital in Havana, Cuba. SUBJECTS AND METHODS Seventy subjects with symptomatic uterine fibroids took one da...

OBJECTIVES We sought to determine predictors of uterine evacuation for women undergoing medical abortion using mifepristone and vaginal misoprostol through 63 days' gestation. STUDY DESIGN We pooled data from two prospective multicenter medical abortion trials. In one study, women received mifepristone 200 mg followed either 6-8 or 23-25 h later by misoprostol 800 mcg vaginally. In the second...

the present study was designed to explore the anti-inflammatory effect of fluvoxamine, as a selective serotonin reuptake inhibitor (ssri) anti-depressant, on carrageenan-induced paw edema in more details. at first, fluvoxamine was administered intra-peritoneally (2.5, 12.5, 25 and 50 mg kg-1) 30 min before the subplantar injection of carrageenan. fluvoxamine was also injected intra-peritoneally...

BACKGROUND This study aims to assess the efficacy of a combination of mifepristone and misoprostol in the management of missed miscarriage and anembryonic pregnancy. METHODS Data of 220 consecutive women with miscarriage, undergoing medical evacuation of the uterus were collected prospectively at an early pregnancy assessment unit in a tertiary referral hospital. Each woman received a single ...

We have investigated the possible involvement of endogenous corticosteroids in the maintenance of hypertension in aged lean and obese Zucker rats using the type II corticosteroid antagonist mifepristone. At 8 mo of age, the start of the study, obese Zuckers had been hypertensive for at least 2 mo (systolic blood pressure; 153 +/- 4 vs. 136 +/- 5 mmHg; n = 8-9; P < .05) and were hyperinsulinemic...