Discovery of triazolopyridinone GS-462808, a late sodium current inhibitor (Late INai) of the cardiac Nav1.5 channel with improved efficacy and potency relative to ranolazine.
Bioorg Med Chem Lett
; 26(13): 3207-3211, 2016 07 01.
Article
em En
| MEDLINE
| ID: mdl-27038498
ABSTRACT
Previously we disclosed the discovery of potent Late INa current inhibitor 2 (GS-458967, IC50 of 333nM) that has a good separation of late versus peak Nav1.5 current, but did not have a favorable CNS safety window due to high brain penetration (3-fold higher partitioning into brain vs plasma) coupled with potent inhibition of brain sodium channel isoforms (Nav1.1, 1.2, 1.3). We increased the polar surface area from 50 to 84Å(2) by adding a carbonyl to the core and an oxadiazole ring resulting in 3 GS-462808 that had lower brain penetration and serendipitously lower activity at the brain isoforms. Compound 3 has an improved CNS window (>20 rat and dog) relative to 2, and improved anti-ischemic potency relative to ranolazine. The development of 3 was not pursued due to liver lesions in 7day rat toxicology studies.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Piridinas
/
Azóis
/
Bloqueadores dos Canais de Sódio
/
Descoberta de Drogas
/
Canal de Sódio Disparado por Voltagem NAV1.5
/
Ranolazina
/
Coração
Limite:
Animals
/
Humans
Idioma:
En
Revista:
Bioorg Med Chem Lett
Assunto da revista:
BIOQUIMICA
/
QUIMICA
Ano de publicação:
2016
Tipo de documento:
Article
País de afiliação:
Estados Unidos