Evaluation of N-phenyl homopiperazine analogs as potential dopamine D3 receptor selective ligands.
Bioorg Med Chem
; 21(11): 2988-98, 2013 Jun 01.
Article
en En
| MEDLINE
| ID: mdl-23618707
A series of N-(2-methoxyphenyl)homopiperazine analogs was prepared and their affinities for dopamine D2, D3, and D4 receptors were measured using competitive radioligand binding assays. Several ligands exhibited high binding affinity and selectivity for the D3 dopamine receptor compared to the D2 receptor subtype. Compounds 11a, 11b, 11c, 11f, 11j and 11k had K(i) values ranging from 0.7 to 3.9 nM for the D3 receptor with 30- to 170-fold selectivity for the D3 versus D2 receptor. Calculated logP values (logP=2.6-3.6) are within the desired range for passive transport across the blood-brain barrier. When the binding and the intrinsic efficacy of these phenylhomopiperazines was compared to those of previously published phenylpiperazine analogues, it was found that (a) affinity at D2 and D3 dopamine receptors generally decreased, (b) the D3 receptor binding selectivity (D2:D3 K(i) value ratio) decreased and, (c) the intrinsic efficacy, measured using a forskolin-dependent adenylyl cyclase inhibition assay, generally increased.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Piperazinas
/
Antagonistas de Dopamina
/
Agonistas de Dopamina
/
Receptores de Dopamina D3
Límite:
Humans
Idioma:
En
Revista:
Bioorg Med Chem
Asunto de la revista:
BIOQUIMICA
/
QUIMICA
Año:
2013
Tipo del documento:
Article
País de afiliación:
Estados Unidos
Pais de publicación:
Reino Unido