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Recent Advances in Identification and Characterization of β-Adrenoceptor Agonists and Antagonists

[ Vol. 7 , Issue. 2 ]

Author(s):

J. Paul Hieble   Pages 207 - 216 ( 10 )

Abstract:


The three β-adrenoceptor subtypes (β1, β2, β3) represent important therapeutic targets. The use of β2- adrenoceptor agonists as bronchodilators and β1 or β1/β2 antagonists as antihypertensives is well established; research is ongoing in these areas to refine pharmacodynamic properties. It is also feasible to design molecules combining β-adrenoceptor affinity with other pharmacophores. This is facilitated by the ability to confer β- adrenoceptor antagonist activity via attachment of a phenylethanolamine moiety or to incorporate diverse structural elements in the N-alkyl substituent of a β-adrenoceptor agonist or antagonist. β3-Adrenoceptor agonists have not yet been successfully developed as drugs for any therapeutic indication; nevertheless, during the past few years many highly potent and selective β3-agonists have been reported, some with good oral bioavailability. Selective β3-adrenoceptor antagonists have also been identified; useful pharmacological tools are now available for the evaluation of the functional role of each β-adrenoceptor subtype.

Keywords:

Phenylethanolamine, phenoxypropanolamine, D2 receptor, phosphodiesterase, calcium channel

Affiliation:

Director, Dept of Urogenital Pharmacology, GlaxoSmithKline, 709 Swedeland Road, King of Prussia, Pennsylvania, 19406-0939, USA.



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