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描述 | Epidermal growth factor receptor (EGFR) is a transmembrane protein involved in cell differentiation and proliferation upon the activation through the binding of its specific ligands. Osimertinib is a potent, irreversible inhibitor of EGFR-sensitizing and T790M-resistant mutation[4]. AZ5104 is an active, demethylated metabolite of osimertinib, which shows the inhibition activity for EGFR (L858R/T790M), EGFR (L858R), EGFR (L861Q), and EGFR (wildtype) with IC50 values of < 1 nM, 6 nM, 1 nM and 25 nM, respectively. AZ5104 had greater potency against wild-type EGFR (33 nM in LOVO), ex19del (2 nM in PC-9), and T790M (2 nM in H1975) cell lines. AZ5104 treatment in HEK293 cells also showed more potency than osimertinib against phosphorylated HER2. In MCF10A cells stably expressing HER2L869R/T798I, cell growth was significantly blocked after the treatment of 100 nM AZ5104 for 5 days. Treatment of 100 nM AZ5104 for 4 hours in serum-free media inhibited pAKT, pERK, and pS6 in both BT474GFP and BT474HER2-T798M cells[5]. Compared to vehicle-treated mice, administration of AZ5104 (5 mg/kg/day) for one to two weeks effectively reduced the tumor volume in both C/L858R and C/L+T mice[6]. | ||
作用机制 | AZ5104 is the active metabolite of osimertinib, which targets the sensitizing and T790M resistant mutant forms of the EGFR. It binds to EGFR through targeting the cysteine-797 residue in the ATP binding site by covalent bond formation, thereby inhibiting the activity of EGFR[6]. |
实验方案 | |||
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1mg | 5mg | 10mg | |
1 mM 5 mM 10 mM |
2.06mL 0.41mL 0.21mL |
10.30mL 2.06mL 1.03mL |
20.59mL 4.12mL 2.06mL |
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