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Purpose The response rate of first-line fluoropyrimidine-based regimens for metastatic colorectal cancer (mCRC) is generally less than 50 %. The down-regulation of miR-197 in colorectal cancer cells after exposure to 5-fluorouracil might be related to the mechanism of resistance to fluoropyrimidine-based chemotherapy. So we investigated the regulatory mechanism of miR-197 on 5-FU sensitivity. Methods...
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