IGF-1R

Inhibition of IGF-IR/InsR or PI3K abrogates AKT membrane localization and phosphorylation. MCF-7/LTED cells were transfected with an AKT PH-GFP plasmid. On day four, cells were treated with 100 ng/ml IGF-I in serum-free medium for 15 minutes, or pre-incubated with 10% DCC-FBS ?1 uM AEW541 or 1 uM BKM120 for 30 minutes followed by treatment with 2 uM AZD5363 for four hours. Cells were viewed in a LSM 510Meta confocal microscope at 40x magnification.

Inhibition of IGF-1 induced IGF-1R phosphorylation by GSK1904529A. A549 cells were serum-starved O/N and pre-incubated for 4 h with 5 μM GSK1904529A, followed by stimulation with 50ng/ml IGF-1. + IGF-1: positive control; -S: negative control.

HER3 plus IGF-1R up-regulation contribute to enhanced SKOV3/T cell proliferation. (A) SKOV3/T cells transfected with HER3 or control shRNA were treated with 2 μM NVP-ADW742 (NVP) followed by SRB assay. Values are mean ± SD from 3 independent experiments. **P < 0.01, NVP-ADW742 treated group or HER3 shRNA group vs. control. (B) SKOV3/T cells transfected with HER3 or control shRNA were treated with or without 2 μM NVP-ADW742 (NVP) and their cell cycle distribution determined by flow cytometry. The data are representative of 3 independent experiments.

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.

IGF-1R is key determinant of the EI24-mediated gefitinib sensitivity. (A and B) EI24-knockdown cells were treated with the indicated concentrations of inhibitorsfor 24 h before cell viability was measured by the MTT assay. Error bars, S.D., p-values were calculated using unpaired t-test.*p < 0.01,**p = 0.0003,***p < 0.0001. (C and D)EI24-knockdown cells were fixed and stained with crystal violet after 14 days treatment with concentrations of gefitinib (0.1 M), PQ401 (5 M), and AG1024 (20 M). (Eand F) Kaplan–Meier survival plots were obtained using Kaplan–Meier Plotter and display the probability of overall survival of lung cancer patients grouped according toEI24 (208289 s at, E) and IGF-1R (203627 at, F) expression. p-Values were calculated using the log-rank test.

(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).

CLL B cells purified from freshly isolated or freeze-thawed PBMCs from CLL patient samples were treated with a single dose of 1 µM PPP and were immunoblotted for the expression of phosphorylated IGF1R and IRS-1 (n = 4).

Inhibition of IGF-IR/InsR or PI3K abrogates AKT membrane localization and phosphorylation. MCF-7/LTED cells were transfected with an AKT PH-GFP plasmid. On day four, cells were treated with 100 ng/ml IGF-I in serum-free medium for 15 minutes, or pre-incubated with 10% DCC-FBS ?1 uM AEW541 or 1 uM BKM120 for 30 minutes followed by treatment with 2 uM AZD5363 for four hours. Cells were viewed in a LSM 510Meta confocal microscope at 40x magnification.

Inhibition of IGF-1 induced IGF-1R phosphorylation by GSK1904529A. A549 cells were serum-starved O/N and pre-incubated for 4 h with 5 μM GSK1904529A, followed by stimulation with 50ng/ml IGF-1. + IGF-1: positive control; -S: negative control.

HER3 plus IGF-1R up-regulation contribute to enhanced SKOV3/T cell proliferation. (A) SKOV3/T cells transfected with HER3 or control shRNA were treated with 2 μM NVP-ADW742 (NVP) followed by SRB assay. Values are mean ± SD from 3 independent experiments. **P < 0.01, NVP-ADW742 treated group or HER3 shRNA group vs. control. (B) SKOV3/T cells transfected with HER3 or control shRNA were treated with or without 2 μM NVP-ADW742 (NVP) and their cell cycle distribution determined by flow cytometry. The data are representative of 3 independent experiments.

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.

IGF-1R is key determinant of the EI24-mediated gefitinib sensitivity. (A and B) EI24-knockdown cells were treated with the indicated concentrations of inhibitorsfor 24 h before cell viability was measured by the MTT assay. Error bars, S.D., p-values were calculated using unpaired t-test.*p < 0.01,**p = 0.0003,***p < 0.0001. (C and D)EI24-knockdown cells were fixed and stained with crystal violet after 14 days treatment with concentrations of gefitinib (0.1 M), PQ401 (5 M), and AG1024 (20 M). (Eand F) Kaplan–Meier survival plots were obtained using Kaplan–Meier Plotter and display the probability of overall survival of lung cancer patients grouped according toEI24 (208289 s at, E) and IGF-1R (203627 at, F) expression. p-Values were calculated using the log-rank test.

(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).

CLL B cells purified from freshly isolated or freeze-thawed PBMCs from CLL patient samples were treated with a single dose of 1 µM PPP and were immunoblotted for the expression of phosphorylated IGF1R and IRS-1 (n = 4).