In vitro and in vivo evaluation of dihydropyrimidinone C-5 amides as potent and selective alpha(1A) receptor antagonists for the treatment of benign prostatic hyperplasia.

Published

Journal Article

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(1b) 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.

Full Text

Duke Authors

Cited Authors

  • Barrow, JC; Nantermet, PG; Selnick, HG; Glass, KL; Rittle, KE; Gilbert, KF; Steele, TG; Homnick, CF; Freidinger, RM; Ransom, RW; Kling, P; Reiss, D; Broten, TP; Schorn, TW; Chang, RS; O'Malley, SS; Olah, TV; Ellis, JD; Barrish, A; Kassahun, K; Leppert, P; Nagarathnam, D; Forray, C

Published Date

  • July 13, 2000

Published In

Volume / Issue

  • 43 / 14

Start / End Page

  • 2703 - 2718

PubMed ID

  • 10893308

Pubmed Central ID

  • 10893308

International Standard Serial Number (ISSN)

  • 0022-2623

Digital Object Identifier (DOI)

  • 10.1021/jm990612y

Language

  • eng

Conference Location

  • United States