Controversial results obtained from human and animal studies on the prevention of heart disease by estrogens and progestins warrant a better understanding of nuclear hormone receptor function and interaction. To address this issue and taking into account that effects of synthetic progestins are not only referable to action through the progesterone receptor but may also be mediated by other ster...

The aim of the present study was to evaluate the degree and duration of respiratory stimulation caused by medroxyprogesterone acetate (MPA), and compare the effect of MPA to that of nasal continuous positive airway pressure (nCPAP) in sleep-disordered breathing. Ten postmenopausal females with predominantly partial upper airway obstruction during sleep had an overnight sleep study at baseline, ...

OBJECTIVE To assess the risk of venous thrombosis associated with nonoral contraceptives (ie, injectable depot-medroxyprogesterone acetate contraceptives, hormone [levonorgestrel]-releasing intrauterine devices, a contraceptive patch, or a contraceptive implant). METHODS AND RESULTS Analyses were performed in the Multiple Environmental and Genetic Assessment study, a large case-control study ...

Background In 2004, WHO Pharmaceuticals Newsletter reported a Pfizer Canada advice originated by results of new clinical studies that suggest the association between use of medroxyprogesterone acetate suspension for injection and substantial loss in bone mineral density. The publication stressed: “The loss in bone density is greater with increasing duration of treatment. The loss in bone densit...

OBJECTIVES Progestogens have been poorly studied concerning their roles in endothelial physiology. Prostanoids are vasoactive compounds, such as thromboxane A2, a potent vasoconstrictor, and prostacyclin, a vasodilator. We examined the effects of two progestogens used clinically, progesterone and medroxyprogesterone acetate, on thromboxane A2 production by cultured human umbilical vein endothel...

Controversial results obtained from human and animal studies on the prevention of heart disease by estrogens and progestins warrant a better understanding of nuclear hormone receptor function and interaction. To address this issue and taking into account that effects of synthetic progestins are not only referable to action through the progesterone receptor but may also be mediated by other ster...

Four year old girl was evaluated for precocious puberty. Breast development and pubic hair growth had started at age 2½ year, and had been followed by vaginal bleeding resembling periods. Gaf-au-lait spots were present in most of her skin surface. Bone x-rays showed multiple cysts in pelvis and the metaphysis of femur. Diagnosis of McCune-Albright syndrome was made. Concentrations of all hormon...

OBJECTIVES The objectives of this study were to estimate the clinical response rate and toxicity of daily tamoxifen combined with intermittent weekly medroxyprogesterone acetate (MPA). METHODS This study reports the results of 61 patients with measurable advanced or recurrent endometrial carcinoma enrolled on this study to be treated with tamoxifen 40 mg p.o. daily plus alternating weekly cyc...