MS 154 is a potent and selective cereblon-recruiting Degrader (PROTAC®) of mutant epidermal growth factor receptor (EGFR), comprising a cereblon-binding moiety joined by a linker to gefitinib(Iressa). MS 154 decreases EGFR protein levels, inhibits downstream signaling in and inhibits proliferation of mutantEGFR-bearing lung cancer cells (DC50values are 11 and 25 nM in HCC-827 and H3255 cells, respectively; Dmax> 95% at 50 nM), but not in WT-EGFR-bearing ovarian and lung cancer cells lines. Bioavailable in mice following ip administration.
JBJ-04-125-02 can inhibit cancer cell proliferation and EGFRL858R T790M C797S signaling. JBJ-04-125-02 has anti-tumor activities. JBJ-04-125-02 is a potent, mutant-selective, allosteric and orally active EGFR inhibitor with an IC50 of 0.26 nM for EGFRL858
CAY10717 is a multi-targeted kinase inhibitor that exhibits greater than 40% inhibition of 34 of 104 kinases in an enzymatic assay at a concentration of 100 nM. It has activity at multiple oncogenic kinases, with IC50 values less than 50 nM against wild-type EGFR and ABL and mutant ABLG250E, ABLY253F, ABLE255K, and B-RafV600E. CAY10717 is highly cytotoxic against a cancer cell panel that includes chemotherapy-sensitive and -resistant cell lines (EC50s = 0.4-158 nM). It also inhibits the growth of human umbilical vein endothelial cells (HUVECs; EC50 = 34 nM), a model for tumor angiogenesis.
Olmutinib is a novel third-generation epidermal growth factor receptor (EGFR) mutation-specific tyrosine kinase inhibitor, used in the treatment of T790M mutation positive non-small cell lung cancer. Olmutinib covalently binds a cysteine residue near the kinase domain of mutantEGFRs to prevent phosphorylation of the receptor. EGFRs are frequently over-expressed in lung cancer and contribute to activation of the phosphoinositide 3-kinase and mitogen-activated protein kinase pathways which both promote cell survival and proliferation. By inhibiting EGFR activation, Olmutinib attenuates the activation of these tumor-promoting pathways. In the first phase I II clinical study of Osimertinib, 800 mg day was chosen as the dose for subsequent studies, and the dose-limiting toxicity and maximum tolerated dose was not reached. Olmutinib received breakthrough therapy designation in the United States in December 2015 and was approved for use in Korea in May 2016.