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Thyroid Hormone Antagonists: Potential Medical Applications and Structure Activity Relationships
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Pharmacy, Department of Medicinal Chemistry, Organic Pharmaceutical Chemistry.
2009 (English)In: Current Medicinal Chemistry, ISSN 0929-8673, E-ISSN 1875-533X, Vol. 16, no 25, 3258-3266 p.Article, review/survey (Refereed) Published
Abstract [en]

Thyroid hormone receptors (TRs) exert profound effects on development, metabolism, and multiple specific organ functions. Principally by regulating crucial genes in a variety of tissues, the thyroid hormones, 3,5,3'-triiodo-L-thyronine (L-T-3, 1) and 3,5,3',5'-tetraiodo-L-thyronine (L-T-4, 2), influence basal calorigenesis and oxygen consumption, cardiac rate and contractility, lipid metabolism, bone structure and strength, and central nervous system functions critical for normal mentation and mood. Elevated levels of circulating and tissue 1 and/or 2 result in the thyrotoxic clinical state, manifested by weight loss despite increased caloric intake; heat intolerance due to increased calorigenesis; cardiac tachyarrhythmias, systolic hypertension, and heart failure; skeletal muscle weakness; and a spectrum of neuropsychiatric symptoms ranging from anxiety to delirium and psychosis. The current standard treatments of endogenous hyperthyroidism causing thyrotoxicosis reduce the overproduction of thyroid hormones by pharmacologically inhibiting their synthesis or release (e.g., with thionamides or lithium, respectively), or by ablating thyroid tissue surgically or with radioiodine. TR-antagonists could hypothetically have significant clinical use in treating thyrotoxic states if they were capable of promptly and completely restoring euthyroid levels of thyroid-specific gene activity. No TR alpha-selective ligands have been prepared up to this date, ligands that potentially would further ameliorate the problem with cardiac disease connected with hyperthyroidism and maybe cardiac arrhythmia. Despite its significant potential use, no TR-antagonist has reached clinical application. Design of TR-antagonists ligands has been based on the attachment of a large extension group at the 5-prime position of 1 or other structurally related analogues. This extension is believed to distort folding of the C-terminal helix ( helix 12) to the body of the ligand binding domain (LBD), which normally forms a coactivator site. Examples of synthetic TR antagonists based on this extension strategy are reviewed, as well as other strategies to achieve functional TR-antagonism.

Place, publisher, year, edition, pages
2009. Vol. 16, no 25, 3258-3266 p.
Keyword [en]
Thyroid hormone receptor, thyroid hormone antagonist, hyperthyroidism, thyrotoxicosis, structure-activity-relationship, design strategy, X-ray structure, amiodarone, LIGAND-BINDING DOMAINS, NUCLEAR RECEPTOR, MOLECULAR-INTERACTIONS, COMPETITIVE INHIBITOR, BIOLOGICAL-ACTIVITY, AMIODARONE ANALOGS, ESTROGEN-RECEPTOR, DRUG-THERAPY, IN-VIVO, BETA
National Category
Medicinal Chemistry
Research subject
Organic Pharmaceutical Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-124923DOI: 10.2174/092986709788803277ISI: 000268259000004OAI: oai:DiVA.org:uu-124923DiVA: diva2:318170
Available from: 2010-05-06 Created: 2010-05-06 Last updated: 2017-12-12Bibliographically approved

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