Biomaterial Database

Overexpression of multidrug resistance genes MDR1 and cMOAT in human hepatocellular carcinoma and hepatoblastoma cell lines. 1999

M Minemura, and H Tanimura, and E Tabor

Toyama Medical and Pharmaceutical University, Toyama, Japan.

Overexpression of either of the multidrug resistance genes MDR1 and MRP is associated with resistance of tumors to multiple chemotherapeutic agents. Overexpression of MDR1 has been reported in some cell lines derived from human hepatocellular carcinomas (HCC) and hepatoblastomas (HB). The human gene for cMOAT (<canalicular multispecific organic anion transporter>), a homologue of MRP, is thought to mediate hepatobiliary excretion of organic anions and to be associated with cisplatin resistance. In this study, expression levels of MDR1 and cMOAT were examined in 9 human HCC and HB cell lines and 10 other human cancer cell lines. Overexpression of the cMOAT gene was observed in all 9 HCC and HB cell lines and 3 of 10 other cancer cell lines. Co-overexpression of the cMOAT and MDR1 genes was observed in 7 of 9 HCC and HB cell lines, but in none of the 10 other cancer cell lines. Seven of the HCC and HB cell lines that had overexpression of the cMOAT gene were shown to be highly resistant to cisplatin compared to 2 HCC cell lines with low levels of cMOAT expression. These findings suggest that overexpression of cMOAT could contribute to cisplatin resistance in HCC and HB.

UI	MeSH Term	Description	Entries
D006528	Carcinoma, Hepatocellular	A primary malignant neoplasm of epithelial liver cells. It ranges from a well-differentiated tumor with EPITHELIAL CELLS indistinguishable from normal HEPATOCYTES to a poorly differentiated neoplasm. The cells may be uniform or markedly pleomorphic, or form GIANT CELLS. Several classification schemes have been suggested.	Hepatocellular Carcinoma,Hepatoma,Liver Cancer, Adult,Liver Cell Carcinoma,Liver Cell Carcinoma, Adult,Adult Liver Cancer,Adult Liver Cancers,Cancer, Adult Liver,Cancers, Adult Liver,Carcinoma, Liver Cell,Carcinomas, Hepatocellular,Carcinomas, Liver Cell,Cell Carcinoma, Liver,Cell Carcinomas, Liver,Hepatocellular Carcinomas,Hepatomas,Liver Cancers, Adult,Liver Cell Carcinomas
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D001693	Biological Transport, Active	The movement of materials across cell membranes and epithelial layers against an electrochemical gradient, requiring the expenditure of metabolic energy.	Active Transport,Uphill Transport,Active Biological Transport,Biologic Transport, Active,Transport, Active Biological,Active Biologic Transport,Transport, Active,Transport, Active Biologic,Transport, Uphill
D014407	Tumor Cells, Cultured	Cells grown in vitro from neoplastic tissue. If they can be established as a TUMOR CELL LINE, they can be propagated in cell culture indefinitely.	Cultured Tumor Cells,Neoplastic Cells, Cultured,Cultured Neoplastic Cells,Cell, Cultured Neoplastic,Cell, Cultured Tumor,Cells, Cultured Neoplastic,Cells, Cultured Tumor,Cultured Neoplastic Cell,Cultured Tumor Cell,Neoplastic Cell, Cultured,Tumor Cell, Cultured
D015972	Gene Expression Regulation, Neoplastic	Any of the processes by which nuclear, cytoplasmic, or intercellular factors influence the differential control of gene action in neoplastic tissue.	Neoplastic Gene Expression Regulation,Regulation of Gene Expression, Neoplastic,Regulation, Gene Expression, Neoplastic
D017136	Ion Transport	The movement of ions across energy-transducing cell membranes. Transport can be active, passive or facilitated. Ions may travel by themselves (uniport), or as a group of two or more ions in the same (symport) or opposite (antiport) directions.	Antiport,Ion Cotransport,Ion Exchange, Intracellular,Symport,Uniport,Active Ion Transport,Facilitated Ion Transport,Passive Ion Transport,Cotransport, Ion,Exchange, Intracellular Ion,Intracellular Ion Exchange,Ion Transport, Active,Ion Transport, Facilitated,Ion Transport, Passive,Transport, Active Ion,Transport, Ion
D018197	Hepatoblastoma	A malignant neoplasm occurring in young children, primarily in the liver, composed of tissue resembling embryonal or fetal hepatic epithelium, or mixed epithelial and mesenchymal tissues. (Stedman, 25th ed)	Hepatoblastomas
D018432	Drug Resistance, Multiple	Simultaneous resistance to several structurally and functionally distinct drugs.	Drug Resistance, Extensively,Extensively Drug Resistance,Extensively-Drug Resistance,Multidrug Resistance,Multi-Drug Resistance,Extensively Drug Resistances,Extensively-Drug Resistances,Multiple Drug Resistance,Resistance, Extensively Drug,Resistance, Extensively-Drug,Resistance, Multiple Drug
D019008	Drug Resistance, Neoplasm	Resistance or diminished response of a neoplasm to an antineoplastic agent in humans, animals, or cell or tissue cultures.	Antibiotic Resistance, Neoplasm,Antineoplastic Drug Resistance,Drug Resistance, Antineoplastic,Antineoplastic Agent Resistance,Neoplasm Drug Resistance,Resistance, Antineoplastic Agent,Resistance, Antineoplastic Drug
D019450	Genes, MDR	Genes for MEMBRANE TRANSPORT PROTEINS that confer resistance to toxic compounds. Several superfamilies of these multidrug export proteins are known and found in both prokaryotes and eukaryotes.	MDR Genes,Multidrug Resistance Gene,Multidrug Efflux Pump Genes,Gene, MDR,Gene, Multidrug Resistance,Genes, Multidrug Resistance,MDR Gene,Multidrug Resistance Genes,Resistance Gene, Multidrug,Resistance Genes, Multidrug