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Previously, we found that KRAS mutant cancer cells showed variable response to AZD6244, a MEK inhibitor through differential activation of EGFR/AKT. To investigate its mechanism, we performed cDNA microarray using four KRAS mutant cancer cells. We found that treatment with AZD6244 reduced the expression of mitogen-inducible gene 6 (MIG6), a negative feedback regulator for EGFR, in AZD6244-resistant...
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