MGCD-265 analog (Glesatinib) is an orally bioavailable multitargeted tyrosine kinase inhibitor with potential antineoplastic activity with IC50 of 29 nM and 10 nM for c-Met and VEGFR2, respectively.

c-Met:29 nM, VEGFR2:10 nM

MGCD-265 is a multi-target inhibitor of receptor tyrosine kinases. MGCD-265 potently inhibits Met, MetY1235D, MetM1250T, VEGFR1, VEGF2, VEGF3, Ron, and Tie2, with IC50 values ranging from 1 nM to 7 nM. [1] MGCD-265 inhibits cell proliferation both in c-Met-driven tumor cells (MKN45, MNNG-HOS, and SNU-5) and in non-c-Met-driven tumor cells (HCT116 and MDA-MB-231), with IC50 values of 6 nM–30 nM and 1 μM–3 μM, respectively. In serum starved MKN45 cells, MGCD-265 (40 nM–5 μM) effectively inhibits c-Met phosphorylation and its downstream signaling pathways, including Erk, Akt, Stat3, and Fak. MGCD-265 (6 nM–1 μM) also induces apoptosis in MKN45 cells.

In c-Met-driven or non-c-Met-driven mice xenograft models of MKN45, U87 mg, MDA-MB-231, COLO205, and A549 tumor cells, MGCD-265 (20 mg/kg–60 mg/kg) inhibits tumor growth and c-Met signaling. MGCD-265 (40 mg/kg) also downregulates genes involved in angiogenesis, including VEGF and IL-8, both in tumor and plasma of mice with U87 mg xenograft. MGCD-265 also inhibits the plasma level of shed-Met.

Time-resolved fluorescence resonance energy transfer assay: The c-Met–catalyzed phosphorylation of N-biotinylated peptide (EQEDEPEGDYFEWLE-CONH2) is measured using a time-resolved fluorescence resonance energy transfer assay. [2] The MK-2461 IC50 for Ron, Mer, Flt1, Flt3, Flt4, KDR, PDGFRβ, FGFR1, FGFR2, FGFR3, TrkA, and TrkB are determined using time-resolved fluorescence resonance energy transfer assays similar to the c-Met kinase assay.

Cells are treated with MGCD-265 for 72 hours and cell number is determined as a function of mitochondrial activity, following incubation with MTT for 4 hours.(Only for Reference)