Hepatic microsomal metabolism of the dichloroethanes.
Biochem Pharmacol
; 32(2): 207-13, 1983 Jan 15.
Article
em En
| MEDLINE
| ID: mdl-6870950
ABSTRACT
The binding of 1,1-dichloroethane (1,1-DCE) to the substrate binding site of hepatic microsomal cytochrome P-450, and the stimulation of hepatic microsomal CO-inhibitable NADPH oxidation by 1,1-DCE and 1,2-dichloroethane (1,2-DCE) were enhanced by induction with phenobarbital but not with beta-naphthoflavone. Incubation of the dichloroethanes with hepatic microsomes from phenobarbital-treated rats, NADPH-generating system and EDTA resulted in the conversion of 1,1-DCE to acetic acid and to a lesser extent to 2,2-dichloroethanol and probably also mono- and dichloroacetic acid and the conversion of 1,2-DCE to chloroacetaldehyde and to a lesser extent to chloroacetic acid and probably 2-chloroethanol. In addition, reaction mixtures constituted as described above resulted in slight but significant losses (ca. 13%) of hepatic microsomal cytochrome P-450. The omission of dichloroethane or the NADPH-generating system from incubation mixtures eliminated the above effects, and SKF-525A or CO diminished or eliminated the effects. Pathways for the metabolism of 1,1-DCE and 1,2-DCE are proposed.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Microssomos Hepáticos
/
Dicloretos de Etileno
/
Hidrocarbonetos Clorados
Limite:
Animals
Idioma:
En
Ano de publicação:
1983
Tipo de documento:
Article