ask 120067

ASK120067 is a potent and orally active inhibitor of EGFRT790M (IC50:0.3 nM) with selectivity over EGFRWT (IC50:6.0 nM). ASK120067 is a third-generation EGFR-TKI for the research of non-small cell lung cancer (NSCLC)[1]. In the in vitro kinase assay ASK120067 potently inhibits the EGFR L858R T790M and EGFR T790M resistant mutants with IC50 values of 0.3 nM and 0.5 nM, respectively, as well as the EGFRexon19del sensitizing mutant (IC50= 0.5 nM). The 50 of ASK120067 against wild-type EGFR (EGFRWT) is 6 nM[1].ASK120067 selectively inhibits the growth of EGFR-mutant cell lines and exhibits potent antiproliferative activity in the mutant EGFR NSCLC cells, with IC50 values of 12 nM, 6 nM and 2 nM against NCI-H1975 (T790M mutation), PC-9, and HCC827 cells (sensitizing mutations), respectively. However, it shows moderate or weak anti-growth activities in A431, LoVo and A549 cells (EGFRWT), with IC50 values ranging from 338 nM to 1541 nM[1].ASK120067 (0.1-100 nM) inhibits the phosphorylation of EGFR at Tyrosine residue 1068 and its downstream signaling proteins AKT and ERK in NCI-H1975 cells (EGFRL858R T790M) even at low dosage (0.1-1 nM). Additionally, ASK120067 inhibits p-EGFR and p-Akt and p-erk in EGFR WT A431 cell until the concentration reaches 10 to 100 nM[1]. ASK120067 (oral gavage; 5-20 mg kg; once daily; 21 days) results in significantly regressed tumor growth, with a tumor growth inhibition (TGI) rate of 85.7%, and administration of 10 mg kg ASK120067 causes dramatic tumor shrinkage with a TGI rate of 99.3%, exhibiting a similar potency with Osimertinib[1]. [1]. Tao Zhang, et al. Discovery of a novel third-generation EGFR inhibitor and identification of a potential combination strategy to overcome resistance. Mol Cancer. 2020 May 13;19(1):90.

Alflutinib (ASK120067) is an inhibitor of EGFR, and its targets including EGFR activating mutations and T790M, thus leading to tumor growth inhibition.