Aims: ID1 is an important component of the MET-SRC signaling pathway, which is a regulator of cell migration and invasion. We hypothesized that the ALK/MET inhibitor crizotinib inhibits migration via MET-SRC-ID1, rather than ALK.
Materials & Methods: We used ALK fusion-positive and -negative lung cancer cell lines; crizotinib, PHA-665752, and saracatinib, and stable transfection with shMET. We performed western blotting for p-ALK, ALK, p-MET, MET, p-SRC, SRC and ID1, and quantitative real-time PCR for ID1.
Results: Crizotinib decreased p-MET, p-SRC and ID1 levels in ALK- and or MET-positive cell lines and inhibited cell migration. Knockdown of MET was comparable with the effect of crizotinib.
Conclusion: The effects of crizotinib on ID1 expression and cancer cell migration were associated with the presence of activated MET, rather than ALK fusion.
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| http://dx.doi.org/10.2217/fon.13.179 | DOI Listing |
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