In some embodiments, the present invention provides methods for enhancing the sensitivity of cancer cells to anti-EGFR treatment, wherein the method comprises the introduction of a miR-200 miRNA to the cancer cells. In other embodiments, the present invention provides methods for treating cancer by exposing the cancer cells to an anti-EGFR composition after the above-mentioned enhancement step. In other embodiments, the present invention provides methods for assessing and enhancing the sensitivity of cancer cells to anti-EGFR treatment. In various other embodiments, the present invention provides compositions and expression vectors for practicing the afore-mentioned methods.
