Non-clinical evaluation of the metabolism, pharmacokinetics and excretion of S-777469, a new cannabinoid receptor 2 selective agonist.
Xenobiotica
; 44(1): 48-58, 2014 Jan.
Article
em En
| MEDLINE
| ID: mdl-23763649
ABSTRACT
1. The drug metabolism and pharmacokinetics of S-777469 were investigated in in vitro (rat, dog and human) and in in vivo (rats and dogs). 2. S-777469 was rapidly and well absorbed, with bioavailability values ranging from 50 to 70% in rats and dogs, almost all drug radioactivity was excreted into the feces via bile within 48 h. Thus, good pharmacokinetics of S-777469 (e.g. systemic exposure and excretion rate) would be anticipated in humans. 3. In vitro metabolism of S-777469 was qualitatively similar in rat, dog and human hepatocytes. S-777469 acyl glucuronide, S-777469 5-hydroxymethyl and S-777469 4-hydroxycyclohexane were the main metabolites in rats, dogs and humans. In vivo metabolism in rats and dogs showed good qualitative agreement with in vitro metabolism, and no metabolites exceeded 10% of total radioactivity in rat and dog plasma. 4. No unique metabolites were observed in human hepatocytes. Therefore, rats and dogs were thought to be appropriate species for non-clinical toxicity studies. 5. In conclusion, these data should be useful for the characterization of the pharmacokinetic properties of S-777469 and the estimation of its pharmacokinetic fate in humans.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Piridonas
/
Radioisótopos de Carbono
/
Receptor CB2 de Canabinoide
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article