title: Monitoring the expression profiles of doxorubicin-induced and doxorubicin-resistant cancer cells by cDNA microarray.
abstract: Drug resistance in cancer is a major obstacle to successful chemotherapy. Cancer cells exposed to antitumor drugs may be directly induced to express a subset of genes that could confer resistance, thus allowing some cells to escape killing and form the relapsed resistant tumor. Alternatively, some cancer cells may be expressing an array of genes that could confer intrinsic resistance, and exposure to cytotoxic drugs select for the survival of these cells that form the relapsed tumor. We have used cDNA microarray to monitor the expression profiles of MCF-7 cells that are either transiently treated with doxorubicin or selected for resistance to doxorubicin. Our results showed that transient treatment with doxorubicin altered the expression of a diverse group of genes in a time-dependent manner. A subset of the induced genes was also found to be constitutively overexpressed in cells selected for resistance to doxorubicin. This distinct set of overlapping genes may represent the signature profile of doxorubicin-induced gene expression and resistance in cancer cells. Our studies demonstrate the feasibility of obtaining potential molecular profile or fingerprint of anticancer drugs in cancer cells by cDNA microarray, which might yield further insights into the mechanisms of drug resistance and suggest alternative methods of treatment.
authors.affiliation: Department of Medicine and The Cancer Institute of New Jersey, University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School, New Brunswick 08901, USA.
authors.forename: K
authors.initials: K
authors.lastname: Kudoh
authors.forename: M
authors.initials: M
authors.lastname: Ramanna
authors.forename: R
authors.initials: R
authors.lastname: Ravatn
authors.forename: A G
authors.initials: AG
authors.lastname: Elkahloun
authors.forename: M L
authors.initials: ML
authors.lastname: Bittner
authors.forename: P S
authors.initials: PS
authors.lastname: Meltzer
authors.forename: J M
authors.initials: JM
authors.lastname: Trent
authors.forename: W S
authors.initials: WS
authors.lastname: Dalton
authors.forename: K V
authors.initials: KV
authors.lastname: Chin
mesh_terms: D000970:Antineoplastic Agents / Q000494:pharmacology*; D001943:Breast Neoplasms / Q000188:drug therapy / Q000235:genetics / Q000378:metabolism; D018076:DNA, Complementary / Q000235:genetics* / Q000378:metabolism; D004273:DNA, Neoplasm / Q000235:genetics* / Q000378:metabolism; D004317:Doxorubicin / Q000494:pharmacology*; D019008:Drug Resistance, Neoplasm; D015870:Gene Expression / Q000187:drug effects*; D020869:Gene Expression Profiling; D015972:Gene Expression Regulation, Neoplastic / Q000187:drug effects; D006801:Humans; D012333:RNA, Messenger / Q000096:biosynthesis / Q000235:genetics / Q000378:metabolism; D014407:Tumor Cells, Cultured
chemical_list: D000970:Antineoplastic Agents; D018076:DNA, Complementary; D004273:DNA, Neoplasm; D012333:RNA, Messenger; D004317:Doxorubicin