In Vitro and in Vivo Evaluation of Dihydropyrimidinone C-5 Amides as Potent and Selective α1A Receptor Antagonists for the Treatment of Benign Prostatic Hyperplasia
摘要:
alpha(1) Adrenergic receptors mediate both vascular and lower urinary tract tone, and alpha(1) receptor antagonists such as terazosin (1b) are used to treat both hypertension and benign prostatic hyperplasia (BPH). Recently, three different subtypes of this receptor have been identified, with the alpha(1A) receptor being most prevalent in lower urinary tract tissue. This paper explores 4-aryldihydropyrimidinones attached to an aminopropyl-4-arylpiperidine via a C-5 amide as selective alpha(1A) receptor subtype antagonists. In receptor binding assays, these types of compounds generally display K-i values for the alpha(1a) receptor subtype <1 nM while being greater than 100-fold selective versus the alpha(1b) and alpha(1d) receptor subtypes. Many of these compounds were also evaluated in vivo and found to be more potent than terazosin in both a rat model of prostate tone and a dog model of intra-urethral pressure without significantly affecting blood pressure. While many of the compounds tested displayed poor pharmacokinetics, compound 48 was found to have adequate bioavailability (>20%) and half-life (>6 h) in both rats and dogs. Due to its selectivity for the alpha(1a) over the alpha(1d) and alpha(1d) receptors as well as its favorable pharmacokinetic profile, 48 has the potential to relieve the symptoms of BPH without eliciting effects on the cardiovascular system.
Selective α1a adrenergic receptor antagonists based on 4-aryl-3,4-dihydropyridine-2-ones
作者:Philippe G Nantermet、James C Barrow、Harold G Selnick、Carl F Homnick、Roger M Freidinger、Raymond S.L Chang、Stacey S O'Malley、Duane R Reiss、Theodore P Broten、Richard W Ransom、Douglas J Pettibone、Timothy Olah、Carlos Forray
DOI:10.1016/s0960-894x(99)00696-4
日期:2000.8
A series of alpha(1a) receptor antagonists derived from a 4-aryl-3,4-dihydropyridine-2-one heterocycle is disclosed. Potency in the low nanomolar to picomolar range along with high selectivity was obtained. In vivo efficacy in a prostate contraction model in rats was observed with a few derivatives. (C) 2000 Elsevier Science Ltd. All rights reserved.
US6235759B1
申请人:——
公开号:US6235759B1
公开(公告)日:2001-05-22
US6339090B1
申请人:——
公开号:US6339090B1
公开(公告)日:2002-01-15
[EN] DIHYDROPYRIDINONES AND PYRROLINONES USEFUL AS ALPHA 1A ADRENOCEPTOR ANTAGONISTS<br/>[FR] DIHYDROPYRIDINONES ET PYRROLINONES UTILISEES COMME ANTAGONISTES DE L'ADRENOCEPTEUR ALPHA 1A
申请人:MERCK & CO INC
公开号:WO2000025782A1
公开(公告)日:2000-05-11
Novel dihydropyridinone and pyrrolinone compounds and pharmaceutically acceptable salts thereof are disclosed. The synthesis of these compounds and their use as alpha 1a adrenergic receptor antagonists is also described. One application of these compounds is in the treatment of benign prostatic hyperplasia. These compounds are selective in their ability to relax smooth muscle tissue enriched in the alpha 1a receptor subtype without at the same time inducing hypotension. One such tissue is found surrounding the urethral lining. Therefore, one utility of the instant compounds is to provide acute relief to males suffering from benign prostatic hyperplasia, by permitting less hindered urine flow. Another utility of the instant compounds is provided by combination with a human 5-alpha reductase inhibitory compound, such that both acute and chronic relief from the effects of benign prostatic hyperplasia can be achieved.