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Long-term use of estrogen supplements by women leads to an increased risk of breast and uterine cancers. Possible mechanisms include metabolism of estradiol and compounds related to tumor-initiating quinones, and ligand-induced activation of the estrogen receptors ERα and ERβ which can cause cancer cell proliferation, depending on the ratio of receptors present. One therapeutic goal would be to create a spectrum of compounds of variable potency for ERα and ERβ, which are resistant to quinone formation, and to determine an optimum point in this spectrum. We describe the synthesis, modeling, binding affinities, hormone potency, and a measure of quinone formation for a new family of A-CD estrogens, where the A-C bond is formed by ring coupling. Some substituents on the A-ring increase hormone potency, and one compound is much less quinone-forming than estradiol. These compounds span a wide range of receptor subtype selectivities and may be useful in hormone replacement therapy.
Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada.
This article was published in the following journal.
Name: Journal of medicinal chemistry
The replacement of the 2-methoxy substituent of N-((6,6-diphenyl-1,4-dioxan-2-yl)methyl)-2-(2-methoxyphenoxy)ethan-1-amine improves the selectivity for 5-HT1A receptor over α1-adrenoceptor and D2-like receptor subtypes.
N-((6,6-diphenyl-1,4-dioxan-2-yl)methyl)-2-(2-methoxyphenoxy)ethan-1-amine (3) is a potent 5-HT1A receptor and α1d-adrenoceptor (α1d-AR) ligand. Analogues 5-10 were rationally designed and prepared ...
We report the design, synthesis and pharmacological screening of a group of analogues of anabaseine 2, a naturally occurring unselective nicotinic agonist. The novel nAChR ligands 5-15 were planned fo...
The Family Smoking Prevention and Tobacco Control Act of 2009 (Public Law 111-31) gave the US Food and Drug Administration (FDA) the responsibility for regulating tobacco products. Nicotine is the pri...
A series of N6-bicyclic and N6-(2-hydroxy)cyclopentyl derivatives of adenosine were synthesized as novel A1R agonists and their A1R/A2R selectivity assessed using a simple yeast screening platform. We...
The high conservation of the orthosteric acetylcholine binding site of muscarinic receptors (MAChR) represents a considerable challenge in terms of designing subtype selective drugs. A promising appro...
This is a research study to evaluate the effectiveness, safety and side effects of several dose levels of esterified estrogens (EE) and methyltestosterone (MT) given individually and in co...
We hypothesize that b2 adrenergic polymorphisms affect b-receptor selectivity in patients with heart failure treated with either a b1-selective or a b-nonselective agent. b-2 polymorphisms...
RATIONALE: High doses of esterified estrogens may stop the growth of breast cancer cells that no longer respond to hormone therapy. PURPOSE: This phase II trial is studying how well high-...
Safety of Estrogens in Lupus Erythematosus - National Assessment (SELENA) is a study to test whether postmenopausal women with systemic lupus erythematosus (SLE, or lupus) can safely use t...
The purpose of this research study is to evaluate the safety and effectiveness of this investigational drug for the treatment of menopausal symptoms while protecting the endometrium (uteri...
A parathyroid hormone receptor subtype that recognizes both PARATHYROID HORMONE and PARATHYROID HORMONE-RELATED PROTEIN. It is a G-protein-coupled receptor that is expressed at high levels in BONE and in KIDNEY.
A parathyroid hormone receptor subtype found in the BRAIN and the PANCREAS. It is a G-protein-coupled receptor with a ligand specificity that varies between homologs from different species.
A serotonin receptor subtype found primarily in the CENTRAL NERVOUS SYSTEM and the CHOROID PLEXUS. This receptor subtype is believed to mediate the anorectic action of SEROTONIN, while selective antagonists of the 5-HT2C receptor appear to induce ANXIETY. Several isoforms of this receptor subtype exist, due to adenine deaminase editing of the receptor mRNA.
A serotonin receptor subtype found widely distributed in peripheral tissues where it mediates the contractile responses of variety of tissues that contain SMOOTH MUSCLE. Selective 5-HT2A receptor antagonists include KETANSERIN. The 5-HT2A subtype is also located in BASAL GANGLIA and CEREBRAL CORTEX of the BRAIN where it mediates the effects of HALLUCINOGENS such as LSD.
A melanocortin receptor subtype found primarily in the ADRENAL CORTEX. It shows specificity for ADRENOCORTICOTROPIC HORMONE.
Diabetes Diabetes Endocrine Obesity Oxycontin Renal Disease Thyroid Disorders Endocrinology is the study of the endocrine glands and the hormones that they secrete (Oxford Medical Dictionary). There are several groups of h...
Women's Health - key topics include breast cancer, pregnancy, menopause, stroke Follow and track Women's Health News on BioPortfolio: Women's Health News RSS Women'...
Track and monitor developments in breast cancer research and commercial development. Follow the tabs above to read the latest global news, research, clinical trials on breast cancer and follow companies active in the development of breast cancer tr...