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- W1520421852 abstract "Currently, there is no marker in use in the clinical management of colon cancer to predict which patients will respond efficiently to 5-fluorouracil (5-FU), a common component of all cytotoxic therapies. Our aim was to develop and validate a multigene signature associated with clinical outcome from 5-FU therapy and to determine if it could be used to identify patients who might respond better to alternate treatments. Using a panel of 5-FU resistant and sensitive colon cancer cell lines, we identified 103 differentially expressed genes providing us with a 5-FU response signature. We refined this signature using a clinically relevant DNA microarray-based dataset of 359 formalin-fixed and paraffin-embedded (FFPE) colon cancer samples. We then validated the final signature in an external independent DNA microarray-based dataset of 316 stage III FFPE samples from the PETACC-3 (Pan-European Trails in Alimentary Tract Cancers) clinical trial. Finally, using a drug sensitivity database of 658 cell lines, we generated a list of drugs that could sensitize 5-FU resistant patients using our signature. We confirmed using the PETACC-3 dataset that the overall survival of subjects responding well to 5-FU did not improve with the addition of irinotecan (FOLFIRI; two-sided log-rank test p = 0.795). Conversely, patients who responded poorly to 5-FU based on our 12-gene signature were associated with better survival on FOLFIRI therapy (one-sided log-rank test p = 0.039). This new multigene signature is readily applicable to FFPE samples and provides a new tool to help manage treatment in stage III colon cancer. It also provides the first evidence that a subgroup of colon cancer patients can respond better to FOLFIRI than 5-FU treatment alone." @default.
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- W1520421852 date "2015-04-09" @default.
- W1520421852 modified "2023-10-18" @default.
- W1520421852 title "A 12‐gene signature to distinguish colon cancer patients with better clinical outcome following treatment with 5‐fluorouracil or FOLFIRI" @default.
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- W1520421852 doi "https://doi.org/10.1002/cjp2.17" @default.
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