UNC3133 is a potent and selective Mer tyrosine kinase (MerTK) inhibitor with IC50 Mer 3.0 nM; Axl 17nM; Tyro 3.31 nM; FLT3 6.6 nM; PO Cmax = 0.023; IV T1 2 = 1.59 h, %F = 16. Mer tyrosine kinase (MerTK) is aberrantly elevated in various tumor cells and ha
KRC-108 is a multiple kinase inhibitor. KRC-108 is a potent inhibitor of Ron, Flt3 and TrkA as well as c-Met. KRC-108 inhibited oncogenic c-Met M1250T and Y1230D more strongly than wild type c-Met. The anti-proliferative activity of KRC-108 was measured by performing a cytotoxicity assay on a panel of cancer cell lines. The GI(50) values (i.e., 50% inhibition of cell growth) for KRC-108 ranged from 0.01 to 4.22 μM for these cancer cell lines. KRC-108 was also effective for the inhibition of tumor growth in human HT29 colorectal cancer and NCI-H441 lung cancer xenograft models in athymic BALB c nu nu mice. This molecule should serve as a useful lead for inhibitors targeting kinases and may lead to new therapeutics for the treatment of cancer. (source: Invest New Drugs. 2012 Apr;30(2):518-23. doi: 10.1007 s10637-010-9584-2. Epub 2010 Nov 16. ).