Drug Metabolism and Pharmacokinetics
Online ISSN : 1880-0920
Print ISSN : 1347-4367
ISSN-L : 1347-4367
Regular Articles
Evaluation of Human CYP1A2 and CYP3A4 mRNA Expression in Hepatocytes from Chimeric Mice with Humanized Liver
Hiroki YOSHITSUGUMasuhiro NISHIMURAChise TATENOMiho KATAOKAEiji TAKAHASHIYoshinori SOENOKatsutoshi YOSHIZATOTsuyoshi YOKOIShinsaku NAITO
Author information
JOURNAL FREE ACCESS

2006 Volume 21 Issue 6 Pages 465-474

Details
Abstract

  We investigated and compared the expression of human CYPs mRNA in primary cultures of cryopreserved human hepatocytes and in chimeric mice constructed by transplanting hepatocytes from the same human donors. Analysis was performed by real-time reverse-transcription polymerase chain reaction. Initial expression levels for the 12 human CYPs mRNA in chimeric mouse hepatocytes were higher than those in human hepatocytes, but a low correlation coefficient was observed (r=0.690). After 24 h of culture, the correlation remained low (r=0.699). The medium was replaced with fresh medium without human epidermal growth factor, and after 48 h of culture, expression of the 12 human CYPs mRNA were very similar in human hepatocytes and chimeric mouse hepatocytes, and a higher correlation coefficient was observed (r=0.809). After 72 h of culture, the correlation remained high (r=0.873). The ratio of human CYP1A2 mRNA to β-actin mRNA in chimeric mouse hepatocytes decreased quickly during the first 24 h of culture, and then remained constant. Expression profiles of human CYP1A2 mRNA in chimeric mouse hepatocytes were similar to those in human hepatocytes after exposure of β-naphthoflavone. CYP3A4 mRNA expression was increased significantly by rifampicin (Rif) exposure in human hepatocytes, whereas Rif-induced increases in CYP3A4 mRNA expression in chimeric mouse hepatocytes was seen for two of the three donors. In conclusion, we demonstrated that expression and induction of human CYPs in human hepatocytes can be reproduced in chimeric mouse hepatocytes.

Content from these authors

This article cannot obtain the latest cited-by information.

© 2006 by The Japanese Society for the Study of Xenobiotics
Previous article Next article
feedback
Top