title: Novel selective β1-adrenoceptor antagonists for concomitant cardiovascular and respiratory disease.
abstract: β-Blockers reduce mortality and improve symptoms in people with heart disease; however, current clinically available β-blockers have poor selectivity for the cardiac β1-adrenoceptor (AR) over the lung β2-AR. Unwanted β2-blockade risks causing life-threatening bronchospasm and reduced efficacy of β2-agonist emergency rescue therapy. Thus, current life-prolonging β-blockers are contraindicated in patients with both heart disease and asthma. Here, we describe NDD-713 and -825, novel highly β1-selective neutral antagonists with good pharmaceutical properties that can potentially overcome this limitation. Radioligand binding studies and functional assays that use human receptors expressed in Chinese hamster ovary cells demonstrate that NDD-713 and -825 have nanomolar β1-AR affinity >500-fold β1-ARvsβ2-AR selectivity and no agonism. Studies in conscious rats demonstrate that these antagonists are orally bioavailable and cause pronounced β1-mediated reduction of heart rate while showing no effect on β2-mediated hindquarters vasodilatation. These compounds also have good disposition properties and show no adverse toxicologic effects. They potentially offer a truly cardioselective β-blocker therapy for the large number of patients with heart and respiratory or peripheral vascular comorbidities.-Baker, J. G., Gardiner, S. M., Woolard, J., Fromont, C., Jadhav, G. P., Mistry, S. N., Thompson, K. S. J., Kellam, B., Hill, S. J., Fischer, P. M. Novel selective β1-adrenoceptor antagonists for concomitant cardiovascular and respiratory disease.
authors.affiliation: Cell Signalling Research Group, School of Life Sciences, University of Nottingham, Nottingham, United Kingdom; jillian.baker@nottingham.ac.uk.
authors.forename: Jillian G
authors.initials: JG
authors.lastname: Baker
authors.affiliation: Cell Signalling Research Group, School of Life Sciences, University of Nottingham, Nottingham, United Kingdom.
authors.forename: Sheila M
authors.initials: SM
authors.lastname: Gardiner
authors.affiliation: Cell Signalling Research Group, School of Life Sciences, University of Nottingham, Nottingham, United Kingdom.
authors.forename: Jeanette
authors.initials: J
authors.lastname: Woolard
authors.affiliation: School of Pharmacy, University of Nottingham, Nottingham, United Kingdom.|Centre for Biomolecular Sciences, University of Nottingham, Nottingham, United Kingdom.
authors.forename: Christophe
authors.initials: C
authors.lastname: Fromont
authors.affiliation: School of Pharmacy, University of Nottingham, Nottingham, United Kingdom.|Centre for Biomolecular Sciences, University of Nottingham, Nottingham, United Kingdom.
authors.forename: Gopal P
authors.initials: GP
authors.lastname: Jadhav
authors.affiliation: School of Pharmacy, University of Nottingham, Nottingham, United Kingdom.|Centre for Biomolecular Sciences, University of Nottingham, Nottingham, United Kingdom.
authors.forename: Shailesh N
authors.initials: SN
authors.lastname: Mistry
authors.affiliation: Cell Signalling Research Group, School of Life Sciences, University of Nottingham, Nottingham, United Kingdom.
authors.forename: Kevin S J
authors.initials: KSJ
authors.lastname: Thompson
authors.affiliation: School of Pharmacy, University of Nottingham, Nottingham, United Kingdom.|Centre for Biomolecular Sciences, University of Nottingham, Nottingham, United Kingdom.
authors.forename: Barrie
authors.initials: B
authors.lastname: Kellam
authors.affiliation: Cell Signalling Research Group, School of Life Sciences, University of Nottingham, Nottingham, United Kingdom.
authors.forename: Stephen J
authors.initials: SJ
authors.lastname: Hill
authors.affiliation: School of Pharmacy, University of Nottingham, Nottingham, United Kingdom; peter.fischer@nottingham.ac.uk.|Centre for Biomolecular Sciences, University of Nottingham, Nottingham, United Kingdom.
authors.forename: Peter M
authors.initials: PM
authors.lastname: Fischer
mesh_terms: D058671:Adrenergic beta-1 Receptor Antagonists / Q000008:administration & dosage / Q000493:pharmacokinetics / Q000494:pharmacology*; D000818:Animals; D001549:Benzamides / Q000494:pharmacology*; D016466:CHO Cells; D006224:Cricetinae; D003412:Cricetulus; D004305:Dose-Response Relationship, Drug; D000072237:ERG1 Potassium Channel / Q000737:chemistry; D006801:Humans; D054833:Isoindoles / Q000494:pharmacology*; D008297:Male; D009152:Mutagenicity Tests; D051381:Rats; D017207:Rats, Sprague-Dawley; D012486:Salmonella typhimurium
chemical_list: D058671:Adrenergic beta-1 Receptor Antagonists; D001549:Benzamides; D000072237:ERG1 Potassium Channel; D054833:Isoindoles; C000606913:KCNH2 protein, human; C000622539:NDD-713; C000622540:NDD-825
keywords: asthma; heart disease; selectivity; β-blocker