Molecular investigation of the effects of lindane in rat hepatocytes: microarray and mechanistic studies.
Food Chem Toxicol
; 49(12): 3128-35, 2011 Dec.
Article
en En
| MEDLINE
| ID: mdl-22001173
ABSTRACT
Although many studies of lindane toxicity have been carried out, we still know little about the underlying molecular mechanisms. We used a microarray specifically designed for studies of the hepatotoxic effects of xenobiotics to evaluate the effects of lindane on specific gene expression in primary cultured rat hepatocytes. These genes were assigned to detoxication processes (CYP3A4, Gsta2, CYP4A1), cell signalling pathways and apoptosis (Eif2b3, Eif2b4, PKC). In this study, we demonstrate that lindane up-regulates PKC by increasing oxidative stress. TEMPO (a well known free radical scavenger) and Ro 31-8220 (an inhibitor of classical PKCs) prevented the inhibition of spontaneous and intrinsic apoptosis pathway (characterised by Bcl-xL induction, Bax down-regulation, caspases inhibition) and the induction of necrosis by lindane in rat hepatocytes. Thus, these findings indicate that several dependent key signalling pathways, including detoxification, apoptosis, PKC activity and redox status maintenance, contribute to lindane-induced toxicity in primary cultured rat hepatocytes. This may account more clearly for the acute and chronic effects of lindane in vivo, with the induction of cell death and tumour promotion, respectively.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Hexaclorociclohexano
/
Análisis de Secuencia por Matrices de Oligonucleótidos
/
Hepatocitos
Límite:
Animals
Idioma:
En
Revista:
Food Chem Toxicol
Año:
2011
Tipo del documento:
Article
País de afiliación:
Francia