FGFR1/DDR2 inhibitor 1 is an orally active inhibitor of fibroblast growth factor receptor 1 (FGFR1) and discoindin domain receptor 2 (DDR2), with IC50 values of 31.1 nM and 3.2 nM, respectively. Antitumor activity[1].

FGFR1/DDR2 inhibitor 1 (compound 11k) (25-200 μM; 2 hours) shows significant inhibition of FGFR2 phosphorylation in a dose-dependent manner in SNU16 cells. FGFR1/DDR2 inhibitor 1 shows (60-250 μM; 2 hours) significant inhibition of DDR2 phosphorylation in a dose-dependent manner in H2286 cells[1]. FGFR1/DDR2 inhibitor 1 significantly inhibits the proliferation of FGFR-driven cancer cell lines with IC50s of 108.4, 93.4, 31.8 and 306.6 nM against KG-1, SNU-16, NCI-H716 and UMUC14 respectively. FGFR1/DDR2 inhibitor 1 demonstrates substantially activity against the DDR2-driven cancer cell line NCI-H2286 (93.0 nM)[1].

FGFR1/DDR2 inhibitor 1 (10-20 mg/kg; p.o.; once daily for 7 days) has profound anti-tumor efficacy in NCI-H1581 tumor model[1].SCID mice bearing NCI-H2286 tumors were randomized and treated with FGFR1/DDR2 inhibitor 1 at doses of 10 mg/kg for 10 consecutive days. FGFR1/DDR2 inhibitor 1 could suppress tumor growth with tumor growth inhibition rates (TGI) of 82.8%[1].

[1]. Wang Q, et al. Discovery and optimization of a series of 3-substituted indazole derivatives as multi-target kinase inhibitors for the treatment of lung squamous cell carcinoma. Eur J Med Chem. 2019 Feb 1;163:671-689.