AZD-3463 (ALK/IGF1R inhibitor), an orally bioavailable ALK inhibitor (Ki: 0.75 nM), can inhibit IGF1R with equivalent potency.

ALK:0.75 nM(Ki)

In vivo, AZD-3463 is equally effective against both the mutated L1196M and the wild-type ALK. When acting on transplanted tumors in vivo, AZD-3463 dose-dependently inhibits pALK, leading to the stagnation (H3122) or reduction (DEL, H2228) of tumor volume.

In various in vitro models resistant to Crizotinib, AZD3463 exhibits antiproliferative efficacy against five out of six cell lines, with a potency four times greater than that of the parent H3122 cells. AZD3463 is effective across tumor cell lines with ALK fusion, including DEL (ALCL NPM-ALK), H2228 (NSCLC EML4-ALK), and H3122 (NSCLC EML4-ALK), by inhibiting ALK and reducing its autophosphorylation.

HDAC enzymatic assays: Tubastatin A is dissolved and diluted in assay buffer (50 mM HEPES, pH 7.4, 100 mM KCl, 0.001% Tween-20, 0.05% BSA, and 20 μM tris(2-carboxyethyl)phosphine) to 6-fold of the final concentration. HDAC enzymes are diluted to 1.5-fold of the final concentration in assay buffer and pre-incubated with Tubastatin A for 10 minutes before the addition of the substrate. The amount of FTS (HDAC1, HDAC2, HDAC3, and HDAC6) or MAZ-1675 (HDAC4, HDAC5, HDAC7, HDAC8, and HDAC9) used for each enzyme is equal to the Michaelis constant (Km), as determined by a titration curve. FTS or MAZ-1675 is diluted in assay buffer to 6-fold the final concentration with 0.3 μM sequencing grade trypsin. The substrate/trypsin mix is added to the enzyme/compound mix and the plate is shaken for 60 seconds and then placed into a SpectraMax M5 microtiter plate reader. The enzymatic reaction is monitored for release of 7-amino-4-methoxy-coumarin over 30 minutes, after deacetylation of the lysine side chain in the peptide substrate, and the linear rate of the reaction is calculated.