In Vitro: Of the 24 cell lines, 2 FGFR1-amplified lung cancer (LC) cell lines, H1581 and DMS114, show extreme sensitivity to Rogaratinib (BAY1163877) (GI50 values ranging from 36 to 244 nM). Treatment with Rogaratinib results in a significant decrease in colonies formed by H1581P cells, but not by H1581AR and BR cells. Ectopic expression of Met significantly induces resistance to Rogaratinib in MTT assays. Met overexpression induces activation of downstream extracellular signal-regulated kinase 1/2 (ERK1/2) and AKT, which cannot be abrogated by Rogaratinib treatment.