当前位置： SCI文献检索 > BIOCHEMICAL PHARMACOLOGY期刊下所有文献 > Effect of repeated administration of 11-hydroxy-delta 8-tetrahydrocannabinol, an active metabolite of delta 8-tetrahydrocannabinol, on the hepatic microsomal drug-metabolizing enzyme system of mice.

Effect of repeated administration of 11-hydroxy-delta 8-tetrahydrocannabinol, an active metabolite of delta 8-tetrahydrocannabinol, on the hepatic microsomal drug-metabolizing enzyme system of mice.

Abstract：

:The effects of delta 8-tetrahydrocannabinol (delta 8-THC) and its major and active metabolite, 11-hydroxy-delta 8-tetrahydrocannabinol (11-OH-delta 8-THC), on the hepatic microsomal drug-metabolizing enzyme system were studied in mice. The repeated administration of 11-OH-delta 8-THC (5 mg/kg/day, i.v.) for 3 or 7 days increased significantly the activities of aniline hydroxylase and p-nitroanisole O-demethylase. By the same treatment, cytochrome P-450 content (3 days) or NADPH-cytochrome c reductase activity (7 days) was also increased significantly. The treatment with delta 8-THC for 7 days (5 mg/kg/day, i.v.) significantly increased aniline hydroxylase only. 11-OH-delta 8-THC increased the Vmax, but not the Km, values for both drug-metabolizing enzymes, whereas delta 8-THC decreases significantly the Km value (270 microM) for p-nitroanisole O-demethylase as compared with the control (398 microM). Repeated administration of these cannabinoids for 7 days also increased the metabolism of delta 8-THC by hepatic microsomes; this was attributed to an enhanced formation of 11-OH-delta 8-THC. In contrast, microsomal formation of 7 alpha-OH-delta 8-THC was decreased significantly by treatment with delta 8-THC. 11-OH-delta 8-THC, but not delta 8-THC, treatment increased the metabolism of 11-OH-delta 8-THC by hepatic microsomes. These findings indicate that delta 8-THC and 11-OH-delta 8-THC treatment can induce hepatic microsomal drug-metabolizing enzymes and affect differently the catalytic properties of the enzymes.

journal_name

Biochem Pharmacol

journal_title

Biochemical pharmacology

authors

Watanabe K,Arai M,Narimatsu S,Yamamoto I,Yoshimura H

doi

10.1016/0006-2952(86)90304-7

subject

Has Abstract

pub_date

1986-06-01 00:00:00

pages

1861-5

issue

11

eissn

0006-2952

issn

1873-2968

pii

0006-2952(86)90304-7

journal_volume

35

pub_type

杂志文章

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