Sunitinib Malate

Sunitinib is a multitargeted tyrosine kinase inhibitor of VEGFR, PDGFRβ and KIT inhibitor with Ki values of 2, 9, 17, 8 and 4 nM for VEGFR -1, -2, -3, PDGFRβ and KIT, respectively. It also inhibits cellular receptor phosphorylation of FLT3, RET and CSF-1R. The recommended dose of sunitinib is 50mg per day for 4 weeks followed by 2 weeks off-treatment (Schedule 4/2). Sunitinib demonstrated superior efficacy to interferon-α for the first-line treatment of mRCC. Sunitinib doubled progression-free survival compared with interferon-α; furthermore, median OS with sunitinib was greater than 2 years. Sunitinib has a distinct and predictable profile of adverse events, most of which are manageable with standard medical interventions. Evaluating the ability of Sunitinib (Sutent) to inhibit ligand-dependent receptor phosphorylation in cells, the effect of Sunitinib (Sutent) on ligand-dependent proliferation of cells was examined.