ALK

(c) Western blot analyses of p-Akt (Ser473) and p-S6RP (Ser235 and Ser236) in two RCT-E565 transplanted tumors treated with vehicle or PF02341066. Samples were isolated 4 h after the last dose from mice treated with PF02341066 for 3 d. (d) Responses of RCT-E565 transplanted tumors in athymic mice to PF02341066 or vehicle. Data are means ±s.e.m. (each group, n = 6). *P < 0.005, **P < 0.001 (Student^,s t test).

(A) H3122 xenografts harboring the EML4-ALK translocation were treated with control vehicle or the ALK inhibitor, TAE-684, for 2 days; the tumors were excised and lysates were prepared. The TIMM results for the control and treated animals are shown. (B) H3122 cells were treated in the presence or absence of TAE-684 (100 nM) for 6 hours in the presence or absence of the indicated ligands [EGF (50 ng/mL), IGF1 (50 ng/mL), and HGF (50 ng/mL)]. Extracts were probed with the indicated antibodies.

Immunoblot analysis of full-length DCTN1-ALK proteins. An expression vector encoding DCTN1-ALK cDNA was introduced into H1299 lung cancer cells, which do not express endogenous ALK. The transfectants were then exposed to crizotinib and alectinib. Levels of phosphorylation at tyrosine 1604 were determined 24 hours after treatment with 0, 0.2, 1.0, or 5.0 μM of each drug.

Quantitation of crystal violet uptake by ORF-expressing cells exposed to crizotinib (CRZ) or ceritinib (CER) normalized to Lac Z. Mean and SE are shown for six (CRZ) or four (CER) independent experiments of three replicates each.

Several ALK inhibitors effectively inhibit the growth of CD74–ROS1–addicted Ba/F3 cells. A, Ba/F3 cells expressing CD74–ROS1 (clone #6) were seeded in 96-well plates and treated with the indicated concentration of crizotinib, ceritinib, AP26113, ASP3026, or alectinib for 72 hours. Cell viability was analyzed using the CellTiter-Glo Assay. B, IC50 values (nmol/L) of Ba/F3 cell lines expressing CD74–ROS1 (clone #6) against various ALK inhibitors are shown. Average IC50 values against crizotinib, ceritinib, or AP26113 were calculated from the three independent experiments. IC50 values against ASP3026 and alectinib were calculated from the single experiment. C, inhibition of phospho-ROS1 by various ALK inhibitors in Ba/F3 models. CD74–ROS1–expressing Ba/F3 cells were exposed to increasing concentrations of crizotinib, ceritinib, AP26113, ASP3026, or alectinib for 3 hours. Cell lysates were immunoblotted to detect the indicated proteins.

GSK1838705A suppresses glioma tumor growth and induces apoptosis in vivo. (A) Following inoculation of U87MG cells, formulated vehicle control or GSK1838705A (4 and 8 mg/kg) was injected into the corresponding group of nude mice (n=6/group) once daily. The tumors were measured every other day for 11 days and the tumor volumes were calculated. Starting on day 7, the differences between the treatment groups (4 and 8 mg/kg) and the vehicle control group were significant (P<0.05). (B) Body weights of the mice during the course of treatment were measured as an indication of significant cytotoxic effects. The data are expressed as the mean ± standard deviation. No significant differences are observed between any two of the groups during the course of treatment. (C) At the end of treatment, the tumors were harvested. GSK1838705A (8 mg/kg) induced the apoptosis of tumor cells in vivo, determined using a TUNEL assay (green) and nuclear staining with Hoechst (blue). Representative images are shown (magnification, ×40). TUNEL, terminal deoxynucleotidyl transferase dUTP nick end labeling.

(E) Immunoblot analysis of lysates of A4573 and TC32 cells following exposure to media only (Control, C); ST/V and V/ST with (+) or without (-) 20 nM AZD3463 using antibodies against ALK, IGF-1R, STAT3 (Y705), p-STAT3, AKT, p-AKT (S473), MAPK, p-MAPK (p42/44).

(A) We transfected the EGFP/Eluc gene into KM12SM cells to establish KM12SM/Eluc cells. KM12SM/Eluc cells were inoculated into the brain of SCID mice. The mice were treated daily with or without entrectinib (15 mg/kg) for 37 days until the bioluminescence increased. Mean ± SE of total flux are shown in the lower panel. Then, the entrectinib-treated brain tumor was harvested at the point indicated by the orange triangle and cultured in vitro. The expanded tumor cells were named KM12SM-ER. (B) The sensitivity of KM12SM-ER and KM12SM cells to entrectinib was determined through cell viability assays, using a CCK-8 kit. The data (mean ± standard deviation [SD] of triplicate cultures) shown are representative of three independent experiments with similar results. (C) Tumor cells were treated with entrectinib (10 nmol/L) for 4 h or c-PARP for 48 h, and harvested lysates were assessed by western blotting. Data shown are representative of three independent experiments with similar results.

Immunoblotting analysis of H3122 and H3122-CER cells showing that brigatinib did not inhibit EGFR phosphorylation (p-EGFR). Total EGFR (t-EGFR) is also shown. Actin was used as a loading control. The cells were treated with brigatinib for 2 hours.

Sub-G1 and cell cycle phase distribution of NBLW and NBLW-R cells treated for 24 hours with DMSO, 1× or 10× the respective GI 50 concentrations of PF-06463922.