オカノ　テルオ   Okano Teruo   岡野　光夫    所属   医学研究科 医学研究科 (医学部医学科をご参照ください)    職種   評議員
論文種別	原著
言語種別	英語
査読の有無	査読あり
表題	Up-regulation of drug-metabolizing enzyme genes in layered co-culture of a human liver cell line and endothelial cells.
掲載誌名	正式名：Tissue engineering. Part A 略　 称：Tissue Eng Part A ISSNコード：(1937-3341)1937-3341(Linking)
掲載区分	国外
巻・号・頁	14(11),pp.1861-9
著者・共著者	Ohno Maki†, Motojima Kiyoto, Okano Teruo, Taniguchi Akiyoshi
発行年月	2008/10
概要	Primary human hepatocytes are used extensively to study drug-metabolizing enzymes such as the cytochrome P450 (CYP) enzymes. However, the activities of these enzymes decrease rapidly during culture. In the present study, using a thermo-responsive culture dish, layered co-culture was achieved by placing a bovine pulmonary artery endothelial cell (BPAEC) sheet onto the human hepatoma cell line HepG2. In the BPAEC/HepG2 layered co-culture system, real-time polymerase chain reaction analysis showed that the expression levels of various CYP enzymes were more than 10 times greater 21 days after layering than with a HepG2 monolayer. The expression levels of CYP1B1, CYP2C9, CYP2E1, and CYP3A4 were up-regulated in a time-dependent manner, gradually increasing from day 10 after layering, and continuing to increase until at least day 21. The gene expression levels of the various CYP enzymes were almost identical to that of human liver. These results suggest that our layered co-culture system enhances the function of HepG2 cells and that our BPAEC/HepG2 layered co-culture system can serve as a useful model for the in vitro evaluation of CYP regulation.
DOI	10.1089/ten.tea.2007.0160
PMID	18847370