Induction of cytochrome P450 2B1-mRNA and pentoxyresorufin O-depentylation after exposure of precision-cut rat liver slices to phenobarbital |
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Authors: | Müller D Steinmetzer P Pissowotzki K Glöckner R |
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Institution: | Institute of Pharmacology and Toxicology, Friedrich Schiller University Jena, Klinikum der FSU Jena, 07740, Jena, Germany. dmue@mti-n.uni-jena.de |
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Abstract: | Precision-cut rat liver slices were prepared from male Wistar rats with a Krumdieck slicer and cultured in William's medium E for up to 24 h. In untreated control slices, CYP2B1-mRNA concentration, which was quantified by competitive RT-PCR, did not decrease during this time. After exposure of the slices to 100 microM phenobarbital, CYP2B1-mRNA increased by about 10- or 60-fold after 6 or 24 h, respectively. The extent of this in vitro induction was similar to that after in vivo administration of 60 mg/kg phenobarbital. Pentoxyresorufin O-depentylation (PROD) was also inducible in vitro after 24 h, but to a lesser extent than the corresponding CYP-mRNA. Precision-cut liver slices proved to be a simple and reliable in vitro system for the sensitive detection of an induction by phenobarbital. |
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