Effect of classic and atypical neuroleptics on cytochrome P450 3A (CYP3A) in rat liver.

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Wojcikowski J, Haduch A, Daniel WA

Effect of classic and atypical neuroleptics on cytochrome P450 3A (CYP3A) in rat liver.

Pharmacol Rep. 2012;64(6):1411-8.

PubMed ID

23406751 [ View in PubMed

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Abstract

BACKGROUND: Cytochrome P450 3A (CYP3A) subfamily is involved in the metabolism of xenobiotics (e.g., drugs) and endogenous substances (e.g., steroids). The aim of the present study was to investigate the influence of classic and atypical neuroleptics on the level and activity of CYP3A in rat liver, measured as a rate of testosterone 2beta- and 6beta-hydroxylation. METHODS: The reactions were studied in control liver microsomes in the presence of neuroleptics, as well as in the microsomes of rats treated intraperitoneally (ip) with pharmacological doses of the drugs (promazine and thioridazine 10 mg/kg; chlorpromazine 3 mg/kg; haloperidol 0.3 mg/kg; risperidone 0.1 mg/kg; sertindole 0.05 mg/kg) for one day or two weeks (twice a day), in the absence of the neuroleptics in vitro. RESULTS: The investigated neuroleptics added in vitro to control liver microsomes produced a moderate or week inhibitory effects on CYP3A activity. After one-day exposure of rats to neuroleptics, only chlorpromazine significantly increased the activity of CYP3A. Chronic treatment of rats with thioridazine diminished the protein level and activity of CYP3A, while risperidone induced this enzyme. CONCLUSION: The observed changes in the CYP3A expression after prolonged exposition to neuroleptics suggest their influence on the enzyme regulation.

DrugBank Data that Cites this Article

Drug Enzymes

Drug	Enzyme	Kind	Organism	Pharmacological Action	Actions
Chlorpromazine	Cytochrome P450 3A4	Protein	Humans	Unknown	Inducer	Details