FGFR1 amplification has recently been detected in squamous cell lung cancer and in the lung cancer cell lines H1581, H520, and DMS-114 (4)...Ponatinib inhibited growth of H1581, H520, and DMS-114 cells with GI50 values of 32, 155, and 108 nmol/L, respectively (Fig. 5C), but had minimal effects on EGFR-mutant HCC827 lung cancer cells that lack constitutive FGFR phosphorylation (GI50 = 611 nmol/L; Fig. 5C; ref. 4).