Drug metabolic activity of cultured hepatocytes can synchronize with bile acid concentration in the medium

Nobuhiro Sugihara, Hirohiko Ise, Naoki Negishi, Toshio Nikaido, Toshihiro Akaike

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The regulation of drug metabolic activity of cultured hepatocytes can be applied to the evaluation of pharmacokinetics, analysis of drug delivery and the bioartificial liver system. It is very difficult to maintain the drug metabolic activity mediated by cytochrome P-450 (CYP) 3A. Recently we found that the CYP3A aminopyrine N-demethylase (AMND) activity of hepatocytes cultured on collagen surface oscillated with culture time. This phenomenon was related to the concentration of bile acid in the culture medium. CYP3A, multidrug resistant gene 2 (MDR2) and heat shock protein 84 (HSP84) mRNA appeared in a manner corresponding to this oscillation. When a large quantity of bile acid was taken up into hepatocytes from the medium, low AMND activity was observed, and these proteins did not appear. When bile acid was secreted and the bile acid concentration inside the hepatocytes was low, high AMND activity was obtained, and these proteins appeared. In order to clarify the mechanism of oscillation between AMND activity and bile acid, 8 μM glycocholic acid was added to the culture medium 15 h before the measurement. No oscillation in AMND activity was observed in the presence of 8 μM glycocholic acid. Bile acid controls the AMND activity in the transcription of hepatocytes.

Original languageEnglish
Pages (from-to)11-17
Number of pages7
JournalCell Biochemistry and Function
Volume20
Issue number1
DOIs
Publication statusPublished - Mar 9 2002
Externally publishedYes

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Aminopyrine N-Demethylase
Bile Acids and Salts
Hepatocytes
Glycocholic Acid
Pharmaceutical Preparations
Cytochrome P-450 CYP3A
Culture Media
Artificial Liver
Pharmacokinetics
Drug and Narcotic Control
Transcription
Heat-Shock Proteins
Drug delivery
Liver
Cytochrome P-450 Enzyme System
Proteins
Collagen
Genes
Messenger RNA

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Clinical Biochemistry
  • Cell Biology

Cite this

Drug metabolic activity of cultured hepatocytes can synchronize with bile acid concentration in the medium. / Sugihara, Nobuhiro; Ise, Hirohiko; Negishi, Naoki; Nikaido, Toshio; Akaike, Toshihiro.

In: Cell Biochemistry and Function, Vol. 20, No. 1, 09.03.2002, p. 11-17.

Research output: Contribution to journalArticle

Sugihara, Nobuhiro ; Ise, Hirohiko ; Negishi, Naoki ; Nikaido, Toshio ; Akaike, Toshihiro. / Drug metabolic activity of cultured hepatocytes can synchronize with bile acid concentration in the medium. In: Cell Biochemistry and Function. 2002 ; Vol. 20, No. 1. pp. 11-17.
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