In vitro induction of bilirubin conjugation in primary rat hepatocyte culture.

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Jemnitz K, Lengyel G, Vereczkey L

In vitro induction of bilirubin conjugation in primary rat hepatocyte culture.

Biochem Biophys Res Commun. 2002 Feb 15;291(1):29-33.

PubMed ID

11829457 [ View in PubMed

]

Abstract

UDP-glucuronosyltransferase (UGT1A1) is a critical enzyme in the elimination of bilirubin. The aim of our study was to investigate bilirubin conjugation in primary rat hepatocyte culture and the in vitro inducibility of this isoenzyme by inducing compounds of different classes: dexamethasone, clofibrate, rifampicin, and methylcholanthrene. Hepatocytes exhibited a marked decline in UGT1A1 activity in the first 4 h of culturing (10% of initial activity) and the recovery took 72 h. Immunoblot analysis proved that the loss of enzyme activity was associated with the decrease of protein concentration. Marked induction was detected in the cases of dexamethasone, clofibrate, and rifampicin treatments for 96 h both in enzyme activity (178, 176, and 168%) and in UGT1A1 protein level (362, 328, and 250%). The effects of dexamethasone and clofibrate were additive (210%). Methylcholanthrene had no influence on bilirubin conjugation in our system.

DrugBank Data that Cites this Article

Drug Enzymes

Drug	Enzyme	Kind	Organism	Pharmacological Action	Actions
Rifampicin	UDP-glucuronosyltransferase 1-1	Protein	Humans	Unknown	Inducer	Details

Drug Interactions

Drugs	Interaction
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