| In Vitro | In vitro activity: MGCD516 (Sitravatinib), is an oral, potent small molecule inhibitor of a closely related spectrum of RTKs including RET, the split RTKs (VEGFR, PDGFR and KIT), TRK family, DDR2, MET and AXL. MGCD516 treatment resulted in significant blockade of phosphorylation of potential driver RTKs and induced potent anti-proliferative effects in vitro.
Kinase Assay: Sitravatinib (formerly known as MGCD516 or MG516) is a novel small molecule inhibitor that targets multiple RTKs (Receptor tysosine kinases) such as c-Kit, PDGFRβ, PDGFRα, c-Met, and Axl.
Cell Assay: 2,000-3,000 cells were plated in 96-well plates in RPMI/DME media with 10% FBS and then treated with the indicated drugs the next day. After 72 hours, media was replaced with 100 μL of media with 10% serum and 10% CCK-8 solution. After 1 hour, the optical density was read at 450 nm to determine viability. Background values from negative control wells without cells were subtracted for final sample quantification. Data was plotted as % cell viability compared to DMSO control. IC50 was extrapolated from cell viability data using CompuSyn software according to the manufacturer's instructions |
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| In Vivo | Sitravatinib has demonstrated antitumor activity in nonclinical cancer models harboring genetic alterations of sitravatinib targets, including rearrangement of RET, NTRK, or CHR4q12 amplification. MGCD516 treatment of tumor xenografts in vivo resulted in significant suppression of tumor growth. Efficacy of MGCD516 was superior to imatinib and crizotinib, two other well-studied multi-kinase inhibitors with overlapping target specificities, both in vitro and in vivo. |
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