title: Concise prediction models of anticancer efficacy of 8 drugs using expression data from 12 selected genes.
abstract: We developed concise, accurate prediction models of the in vitro activity for 8 anticancer drugs (5-FU, CDDP, MMC, DOX, CPT-11, SN-38, TXL and TXT), along with individual clinical responses to 5-FU using expression data of 12 genes. We first performed cDNA microarray analysis and MTT assay of 19 human cancer cell lines to sort out genes which were correlative in expression levels with cytotoxicities of the 8 drugs; we selected 13 genes with proven functional significance to drug sensitivity from a huge number of potent prediction marker genes. The correlation significance of each was confirmed using expression data quantified by real-time RT-PCR, and finally 12 genes (ABCB1, ABCG2, CYP2C8, CYP3A4, DPYD, GSTP1, MGMT, NQO1, POR, TOP2A, TUBB and TYMS) were selected as more reliable predictors of drug response. Using multiple regression analysis, we fixed 8 prediction formulae which embraced the variable expressions of the 12 genes and arranged them in order, to predict the efficacy of the drugs by referring to the value of Akaike's information criterion for each sample. These formulae appeared to accurately predict the in vitro efficacy of the drugs. For the first clinical application model, we fixed prediction formulae for individual clinical response to 5-FU in the same way using 41 clinical samples obtained from 30 gastric cancer patients and found to be of predictive value in terms of survival, time to treatment failure and tumor growth. None of the 12 selected genes alone could predict such clinical responses.
authors.affiliation: Department of Translational Cancer Research, Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima, Japan.
authors.forename: Tomotaka
authors.initials: T
authors.lastname: Tanaka
authors.forename: Keiji
authors.initials: K
authors.lastname: Tanimoto
authors.forename: Keiko
authors.initials: K
authors.lastname: Otani
authors.forename: Kenichi
authors.initials: K
authors.lastname: Satoh
authors.forename: Megu
authors.initials: M
authors.lastname: Ohtaki
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Yoshida
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Toge
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Yahata
authors.forename: Shinji
authors.initials: S
authors.lastname: Tanaka
authors.forename: Kazuaki
authors.initials: K
authors.lastname: Chayama
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Okazaki
authors.forename: Yoshihide
authors.initials: Y
authors.lastname: Hayashizaki
authors.forename: Keiko
authors.initials: K
authors.lastname: Hiyama
authors.forename: Masahiko
authors.initials: M
authors.lastname: Nishiyama
mesh_terms: D000964:Antimetabolites, Antineoplastic / Q000494:pharmacology*; D000970:Antineoplastic Agents / Q000494:pharmacology*; D005472:Fluorouracil / Q000494:pharmacology*; D005544:Forecasting; D020869:Gene Expression Profiling; D006801:Humans; D008962:Models, Theoretical; D020411:Oligonucleotide Array Sequence Analysis; D011237:Predictive Value of Tests; D012044:Regression Analysis; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013274:Stomach Neoplasms / Q000188:drug therapy* / Q000235:genetics*
chemical_list: D000964:Antimetabolites, Antineoplastic; D000970:Antineoplastic Agents; D005472:Fluorouracil