Target Validation Information
TTD ID T99031
Target Name ERK activator kinase (MEK)
Type of Target
Successful
Drug Potency against Target PD-0325901 Drug Info IC50 = 0.34 nM [1]
Selumetinib Drug Info IC50 = 14 nM [2]
Action against Disease Model Selumetinib Drug Info AZD6244 is effective in colorectal cancer cell lines with BRAF or KRAS mutations. Sensitivity to MEK1/2 inhibition correlates with a biochemical signature; those cells with highERK1/2 activity (whether mutant for BRAF or KRAS) evolve a dependency upon that pathway and tend to be sensitive to AZD6244 but this can be offset by high PI3K-dependent signalling. [3]
References
REF 1 Progress towards therapeutic small molecule MEK inhibitors for use in cancer therapy. Curr Top Med Chem. 2005;5(2):215-29.
REF 2 Therapeutic strategies for inhibiting oncogenic BRAF signaling. Curr Opin Pharmacol. 2008 Aug;8(4):419-26.
REF 3 Intrinsic resistance to the MEK1/2 inhibitor AZD6244 (ARRY-142886) is associated with weak ERK1/2 signalling and/or strong PI3K signalling in colorectal cancer cell lines. Int J Cancer. 2009 Nov 15;125(10):2332-41.

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