IGF-1R

(A) KRAS mutant (SW837 and LoVo) or KRAS/PIK3CA mutant (HCT-116) colorectal cancers were treated with the indicated compounds for 6 hours (gef, gefitinib 1 μM; NVP, NVP-AEW541 1 μM; PHA, PHA-665752 1 μM), and the resulting protein lysates were immunoprecipitated with an anti-p85 antibody. The precipitated proteins were analyzed by Western blots with the indicated antibodies. Whole cell extracts were probed with the indicated antibodies. Asterisks indicate the IRS proteins for SW837 and HCT-116 cells, and ERBB3 for LoVo cells. (B) SW837 cells were grown in either normal serum (5% FBS) or low serum (0.5% FBS) and treated with vehicle, R1507 anti–IGF-IR antibody (25 μg/ml), or NVP-AEW541 (1 μM) for 6 hours. The cells were lysed and probed with the indicated antibodies.

(E) The level of migration ability of HEC-1B cells treated with insulin, GSK1904529A, and the silencing of DHCR24 was determined using a transwell assay. (F) The invasion ability of HEC-1B cells treated with insulin, GSK1904529A, and silencing of DHCR24 was probed. The data are presented as the mean ± SD of three independent experiments. (*p < 0.05; **p < 0.01; ***p < 0.001).

Relative cell viability of 72 hours of treatment with IGF1R/IR inhibitors. a-b OSI-906 does not inhibit chondrosarcoma cell viability, even in the presence of IGF1. c-d IGF1R inhibitors NVP-ADW742 and GSK1838705A do not inhibit chondrosarcoma cell viability

A, cell viability reduction. TC1889 cells were treated with pharmacological inhibitors against IGF-1R (NVP and BMS), as well as a neutralizing IGF-1R antibody (aIR3) and cell viability was assessed using MTT-assays. Mouse IgG1 antibody was employed as a reference control for the effects of aIR3 at respective concentrations. Assays were performed in sextuple. Data are expressed as the mean SD (n 3). B, induction of cell death. TC1889 cells were treated with pharmacological inhibitors against IGF-1R as well as a neutralizing IGF-1R antibody and cell death was evaluated by FACS-analyses following PI-staining. Data are expressed as the mean SD (n =3).

 

(A) CLL B cells purified from freshly isolat ed or freeze-thawed PBMCs from CLL patient samples were treated with a single dose of 15 µM AG1024, 1µM PPP or 1µM linsitinib for 24h and cell survival was determined by flow cytometry. Results are shown as mean  ± SEM, n=20. (B)CLL B cells purified from freshly isolat ed or freeze-thawed PBMCs from CLL patient samples were treated with a single dose of 15 µM AG1024 (AG) or 1µM linsitinib (L) and immunoblotted for the expression of phosphorylated IGF1R and IRS-1 (n=6). (C) CLL B cells purified from freshly isolat ed or freeze-thawed PBMCs from CLL patient samples were treated with a single dose of 1µM PPP and immunoblotted for the expression of phosphorylated IGF1R and IRS-1 (n=4). (D) CLL B cells purified from freshly isolated or freeze-thawed PBMCs from CLL patient samples were treated with 5-15 µM AG1024 and subject to a Western blot analysis using the indicated antibodies. Results are represented as mean±SEM (n=10). Supplementary Figure 1C shows the associated densitometrical analysis after treatment with 15 µM AG1024. (E) CLL B cells purified from freshly isolat ed or freeze-thawed PBMCs from CLL patient samples were treated with 10-500nM rhIGF-1 and immunoblotted for the expression of IGF1R, pIGF1R, pAkt, Akt, pERK and Erk. A representative example from four independent experiments is shown.

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.

PQ401 induces apoptosis in glioma cells. (A) U87MG cells were treated with PQ401 at the indicated concentrations for 48 hours, followed by PI staining and flow cytometry analysis. * indicates P < 0.05 by one-way ANOVA followed by Dunnet's test for comparisons between PQ401 treatments with various doses and no PQ401 treatment group. (B) U87MG cells were incubated with PQ401 for 48 hours. The nuclei were stained with Hoechst and analyzed using a fluorescent microscope. The representative images are presented. (C) The number of cells with condensed/fragmented nuclei was quantitated by counting in seven random fields and the inhibition was calculated. * indicates P < 0.05 by one-way ANOVA followed by Dunnet's test for comparisons between PQ401 treatments with various doses and no PQ401 treatment group.

(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).

(E): Expression levels of NANOG and p-IGF-IR were measured by immunoblotting in HCT116 and SW620 cells after treatment with IGF-II or PPP.