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Hepatic microsomal metabolism of the dichloroethanes.

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.

journal_name

Biochem Pharmacol

journal_title

Biochemical pharmacology

authors

McCall SN,Jurgens P,Ivanetich KM

doi

10.1016/0006-2952(83)90545-2

subject

Has Abstract

pub_date

1983-01-15 00:00:00

pages

207-13

issue

2

eissn

0006-2952

issn

1873-2968

pii

0006-2952(83)90545-2

journal_volume

32

pub_type

杂志文章

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