Background:

Foretinib (GSK1363089) is a novel, potent, small-molecule inhibitor of member of the vascular endothelial growth factor (VEGF)and hepatocyte growth factor (HGF) receptor tyrosine kinase families [1].

Foretinib inhibits Met, Ron, KDR, Flt-1, Flt-4, KIT, Flt-3, Platelet-derived growth factor receptor α, Platelet-derived growth factor receptor β and Tie-2 with IC50 values of 0.4, 3, 0.86, 6.8, 2.8, 6.7, 3.6, 3.6, 9.6 and 1.1 nmol/L, respectively. Foretinib has shown to inhibit cellular MET in murine B16F10 melanoma cells and PC-3 prostate cells with IC50 values of 21 and 23 nmol/L [1].

Foretinib revealed to inhibit the migration and invasion induced by HGF in murine B16F10 melanoma cells. Additionally, Foretinib suppressed the B16F10, A549 and HT29 tumor cells growth with IC50 values of 40, 29 and 165 nmol/L [1].

Reference:
[1] Qian F1, Engst S, Yamaguchi K, Yu P, Won KA, Mock L, Lou T, Tan J, Li C, Tam D, Lougheed J, Yakes FM, Bentzien F, Xu W, Zaks T, Wooster R,Greshock J, Joly AH.  Inhibition of tumor cell growth, invasion, and metastasis by EXEL-2880 (XL880, GSK1363089), a novel inhibitor of HGF and VEGF receptor tyrosine kinases. Cancer Res. 2009 Oct 15;69(20):8009-16. doi: 10.1158/0008-5472.CAN-08-4889.