Description: |
AST-1306 also ErB2 and EGFR T790M/L858R double mutant. AST-1306 is approximately 500-fold more potent than lapatinib and more than 3000-fold selective For ErbB family kinases over other kinase families including PDGFR, KDR and c-Met. AST-1306 might covalently bind to specific amino acid residues of EGFR and ErbB2. AST-1306 acts in a concentration dependent manner to significantly inhibit the growth of HIH3T3-EGFR T790M/L858R cells. AST-1306 effectively suppresses EGFR phosphorylation in HIH3T3-EGFR T790M/L858R cells. Moreover, AST-1306 blocks the growth of NCI-H1975 cells that harbor the EGFR T790M/L858R mutation in a concentration-dependent manner. AST-1306 blocks phosphorylation of EGFR and downstream pathways as well. In addition, AST-1306 dose-dependently and markedly inhibits EGF-induced EGFR phosphorylation in A549 cells. AST-1306 inhibits the phosphorylation of EGFR and ErbB2, and downstream signaling in human cancer cells including A549 cells, Calu-3 cells and SK-OV-3 cells. Twice daily oral administration of AST-1306 gives rise to a dramatic prevention of tumor growth in SK-OV-3 and Calu-3 xenograft models. In SK-OV-3 models, tumors nearly disappears after treatment with AST-1306 For 7 days. In contrast, AST-1306 only slightly inhibits the growth of tumor in HO-8910 and A549 xenograft models. There Fore, the antitumor efficacy of AST-1306 is greater in ErbB2-overexpressing tumor models than in models expressing low levels of ErbB2. AST-1306 is well tolerated. Lapatinib displays antitumor activity in these ErbB2-overexpressing tumor models, but AST-1306 is more efficacious than lapatinib in the SK-OV-3 xenograft tumor model when given at the same dose and schedule. In addition, oral administration of AST-1306 twice daily For 3 weeks dramatically suppresses the growth of tumor in the FVB-2/Nneu models. After treatment For 11 days, tumors almost completely disappears. The body weights of the mice reduces by less than 20% during treatment. For the detailed information of AST-1306, the solubility of AST-1306 in water, the solubility of AST-1306 in DMSO, the solubility of AST-1306 in PBS buffer, the animal experiment (test) of AST-1306, the cell expriment (test) of AST-1306, the in vivo, in vitro and clinical trial test of AST-1306, the EC50, IC50,and Affinity of AST-1306, Please contact DC Chemicals. |