RRC ID 38843
Author Tomonaga M, Oka M, Narasaki F, Fukuda M, Nakano R, Takatani H, Ikeda K, Terashi K, Matsuo I, Soda H, Cowan KH, Kohno S.
Title The multidrug resistance-associated protein gene confers drug resistance in human gastric and colon cancers.
Journal Jpn J Cancer Res
Abstract To determine the expression of multidrug resistance-associated protein (MRP) gene and its role in gastric and colon cancers, we analyzed 10 gastric and 10 colon non-drug-selected cell lines and a similar number of tissue samples of these cancers. We compared the expression of MRP and mdrl mRNA in cell lines and tissues using reverse-transcriptase polymerase chain reaction. In mdrl-negative cells, the relationship between the level of MRP gene expression and sensitivity to anticancer drugs was examined. The effect of verapamil, an MRP-modulating agent, was also examined in these cells. The expression of MRP gene in gastric cancer cell lines varied from a low to a high level, but mdrl was not detected in any of these cell lines. Colon cancer cell lines expressed low to intermediate levels of MRP gene, and half of the cells co-expressed low to high levels of mdrl. In tissue samples, the expression pattern of the two multidrug resistance (MDR) genes was broadly similar to that described for the cell lines, except that most of the gastric cancer tissue samples did express low levels of mdrl. No significant correlation was observed between the level of MRP gene expression and sensitivity to anticancer drugs in gastric and colon cell lines. However, verapamil significantly increased the sensitivity to etoposide, doxorubicin and vincristine in cells highly expressing MRP gene. Our results indicate that MRP gene may be important in conferring MDR in gastric and colon cancer cells.
Volume 87(12)
Pages 1263-70
Published 1996-12-1
DOI 10.1111/j.1349-7006.1996.tb03142.x
PII S0910505097871207
PMID 9045962
PMC PMC5921022
MeSH Antineoplastic Agents / pharmacology Camptothecin / analogs & derivatives Camptothecin / pharmacology Cisplatin / pharmacology Colonic Neoplasms / drug therapy* Colonic Neoplasms / genetics Doxorubicin / pharmacology Etoposide / pharmacology Genes, MDR* Humans Irinotecan Mitomycin / pharmacology Polymerase Chain Reaction RNA, Messenger / metabolism Stomach Neoplasms / drug therapy* Stomach Neoplasms / genetics Tumor Cells, Cultured Verapamil / pharmacology Vincristine / pharmacology
Times Cited 44
Human and Animal Cells HGC-27(RCB0500)