title: Hormone therapy: physiological complexity belies therapeutic simplicity.
abstract: The results of the Women's Health Initiative, a study anticipated to provide definitive answers about health benefits and risks of postmenopausal hormone therapy, have generated debate and confusion among clinicians, researchers, and the lay public. The ovarian hormones estrogen and progesterone, which decline at menopause, normally elicit complex tissue-specific responses throughout the body. Major advances are providing a detailed molecular definition of how that differential action is achieved. Here we review estrogen and progestin actions, discuss how effectively knowledge of steroid hormone endocrinology has been incorporated into clinical studies, and consider the impact on modern hormone therapy protocols and pharmaceutical development.
authors.affiliation: Department of Internal Medicine, Division of Endocrinology, Clinical Nutrition, and Vascular Medicine, University of California-Davis, Davis, CA 95616, USA. jlturgeon@ucdavis.edu
authors.forename: Judith L
authors.initials: JL
authors.lastname: Turgeon
authors.forename: Donald P
authors.initials: DP
authors.lastname: McDonnell
authors.forename: Kathryn A
authors.initials: KA
authors.lastname: Martin
authors.forename: Phyllis M
authors.initials: PM
authors.lastname: Wise
mesh_terms: D000368:Aged; D000818:Animals; D002320:Cardiovascular Physiological Phenomena / Q000187:drug effects; D015914:Estrogen Replacement Therapy / Q000009:adverse effects; D004967:Estrogens / Q000008:administration & dosage / Q000494:pharmacology / Q000502:physiology*; D005260:Female; D006801:Humans; D050356:Lipid Metabolism; D017258:Medroxyprogesterone Acetate / Q000008:administration & dosage / Q000378:metabolism / Q000494:pharmacology; D008875:Middle Aged; D018696:Neuroprotective Agents; D011374:Progesterone / Q000378:metabolism / Q000494:pharmacology / Q000502:physiology*; D016032:Randomized Controlled Trials as Topic; D011960:Receptors, Estrogen / Q000378:metabolism; D011980:Receptors, Progesterone / Q000378:metabolism; D015398:Signal Transduction; D020521:Stroke / Q000517:prevention & control
chemical_list: D004967:Estrogens; D018696:Neuroprotective Agents; D011960:Receptors, Estrogen; D011980:Receptors, Progesterone; D011374:Progesterone; D017258:Medroxyprogesterone Acetate