Raf

The regressing tumour microenvironment stimulates the outgrowth, infiltration and metastasis of drug-resistant clones. b, Bioluminescent signal of drug-resistant A375RTGL cells in vemurafenib-sensitive, A375 tumours, treated with vehicle or vemurafenib for 5 days (vehicle, n = 36; vemurafenib, n = 15 tumours). D, day. c, EdU incorporation in A375R-TGL cells in A375/A375R-TGL tumours treated with vehicle or vemurafenib for 4 days, as determined by FACS (vehicle, n = 8; vemurafenib, n = 6 tumours). d, Bioluminescent signal of A375R-TGL tumours alone, treated with vehicle or vemurafenib for 5 days (vehicle, n 5 38; vemurafenib, n = 15 tumours). e, Bioluminescent signal of TGLexpressing drug-resistant cancer cells (A375R, M249R4, PC9 and H2030) in drug-sensitive tumours (Colo800, LOX, UACC62, M249, H3122 and HCC827) treated with vehicle or drugs (vemurafenib, crizotinib and erlotinib) for 5 days (n (from left to right on the graph) = 6, 7, 12, 12, 9, 9, 25, 26, 9, 12, 12, 12, 16 and 11 tumours). f, Spontaneous lung metastasis by A375R cells in mice bearing A375/A375R-TGL tumours treated with vehicle or vemurafenib (10 days), visualized by BLI (n = 4).

 

Inhibition of breast cancer cell growth using sorafenib. MCF-7 breast cancer cells were treated with increasing concentrations of sorafenib for 5 days. Cell number was measured  using a colorimetric growth assay (crystal violet stain) and expressed relative to DMSO treated control cells.

Combinatorial knockdown of NF1 and C-RAF abrogates NF1-mediated resistance to B-RAF inhibition at the level of ERK phosphorylation. A375 cells were infected with NF1 shRNA and treated with either DMSO or PLX4720 for 16 h. Cell lysates were analyzed for the indicated proteins.

A375P cells were treated with vehicle, the BRAF inhibitor GSK2118436, the MEK inhibitor GSK1120212, 10 uM HCQ, or the indicated combinations. Shown are 48-hour immunoblots directed against the indicated proteins.

Hepatoma cells 24 h after plating were treated with vehicle (DMSO), regorafenib (REGO, 0.5 µM), PDE5 inhibitor (sildenafil, 2 µM); or the drugs in combination. 24 hours after treatment cells were isolated and viability determined by trypan blue (n=3, SEM). *P 0.05

Effect of blockade of p38 or MEK on MK2 activation following TLR stimulation in moDC. MoDC were pre-treated with p38 inhibitors SB203580 10 mM (S), BIRB0796 (B) 0.1 or 1.0 mM or MEK inhibitor UO126 10 mM (U) for 1hr followed by poly I:C/R848 stimulation for 30 min then Western blotted for p-MK2 with β-actin loading control.

 

Melanoma cell viability and in vivo growth by cyclindependent kinase 2/4 inhibition. Western blot analysis for c-Jun, phosphorylated-ERK1/2 (Thr202/Tyr204) (p-ERK1/2), and total ERK1/2 protein levels was done for human melanoma cell lines treated with the BRAFV600E inhibitor GDC-0879 (1 μM), or MEK inhibitors CI-1040 (1 μM), U0126 (1 μM), and PD98059 (10 μM) for 18 hours.

Immunoblots showing levels of phospho-MEK (p-MEK), total MEK (t-MEK), phospho-ERK1/2 (p-ERK1/2) and total ERK1/2 (t-ERK1/2) in A375 cells transduced with a retrovirus expressing BRAFV600E, BRAFV600E/L505H, BRAFV600E/F516G or BRAFV600E/T529N and treated with increasing doses of RAF265. α-tubulin (TUBA) was monitored as a loading control.

Enzymatic activity of RIP3 from Abcam, the concentration-effect relationship of RIP3 inhibition by the tested protein kinase inhibitors and the mode of action of RIP3 inhibition by dabrafenib. The RIP3 inhibition rates of AZ628 at different concentrations were measured by the luminescent RIP3 assay. The data (mean ?SD from 3 independent experiments) were presented as the Lineweaver-Burk plots using Graphpad Prism 5.

Cell morphology of BCPAP, K1 and 8505C cells treated and untreated with SB590885 using IC50 dose. Massive vacuolization is easily visible around the nuclei in treated cells.

Effect of inhibitors on EAP’s proliferation activity in NIH3T3 cell by MTT assay. Data are presented as mean ± SD of three independent experiments. **p50.01 versus EAP.

Involvement of EV linc-VLDLR in tumor cell responses to chemotherapy. Cells were incubated with sorafenib, camptothecin, or doxorubicin. EVs were obtained after 24 hours, and qRT-PCR was performed for linc-VLDLR. The bars represent the mean ?SEM of the increase in cell viability from 3 independent studies. *, P < 0.05.

 

 

Graph showing a concentration-dependent response of hypoxia-induced HIF-1α-NanoLuc activity to RAS-RAF-MEK-ERK pathway inhibitors: GDC-0994, PD-184352, selumetinib, TAK632, trametinib, and vemurafenib.

Whole cell lysates from NRAS- or BRAF-mutant melanoma cells treated with encorafenib or/and binimetinib or DMSO as a control for 24 h were subjected to Western blot analysis to detect pERK, ERK and β-Actin. Experiment shown is a representative of three independent experiments.

B, VE or VELV were transiently transfected in SKBR3 for 24 hours. Then, the cells were treated with 1 μmol/L lapatinib for 1 hour, followed by treatment with DMSO or the RAF inhibitors indicated for 1 hour (the dose for vemurafenib, PLX7904, LY3009120, TAK632, BGB3245, and BGB3290 is 1 μmol/L; the dose for dabrafenib and PLX8394 is 300 nmol/L). Untransfected (UT) SKBR3 cells were treated with DMSO or 1 μmol/L lapatinib (lanes 1 and 2)

The regressing tumour microenvironment stimulates the outgrowth, infiltration and metastasis of drug-resistant clones. b, Bioluminescent signal of drug-resistant A375RTGL cells in vemurafenib-sensitive, A375 tumours, treated with vehicle or vemurafenib for 5 days (vehicle, n = 36; vemurafenib, n = 15 tumours). D, day. c, EdU incorporation in A375R-TGL cells in A375/A375R-TGL tumours treated with vehicle or vemurafenib for 4 days, as determined by FACS (vehicle, n = 8; vemurafenib, n = 6 tumours). d, Bioluminescent signal of A375R-TGL tumours alone, treated with vehicle or vemurafenib for 5 days (vehicle, n 5 38; vemurafenib, n = 15 tumours). e, Bioluminescent signal of TGLexpressing drug-resistant cancer cells (A375R, M249R4, PC9 and H2030) in drug-sensitive tumours (Colo800, LOX, UACC62, M249, H3122 and HCC827) treated with vehicle or drugs (vemurafenib, crizotinib and erlotinib) for 5 days (n (from left to right on the graph) = 6, 7, 12, 12, 9, 9, 25, 26, 9, 12, 12, 12, 16 and 11 tumours). f, Spontaneous lung metastasis by A375R cells in mice bearing A375/A375R-TGL tumours treated with vehicle or vemurafenib (10 days), visualized by BLI (n = 4).

 

Inhibition of breast cancer cell growth using sorafenib. MCF-7 breast cancer cells were treated with increasing concentrations of sorafenib for 5 days. Cell number was measured  using a colorimetric growth assay (crystal violet stain) and expressed relative to DMSO treated control cells.

Combinatorial knockdown of NF1 and C-RAF abrogates NF1-mediated resistance to B-RAF inhibition at the level of ERK phosphorylation. A375 cells were infected with NF1 shRNA and treated with either DMSO or PLX4720 for 16 h. Cell lysates were analyzed for the indicated proteins.

A375P cells were treated with vehicle, the BRAF inhibitor GSK2118436, the MEK inhibitor GSK1120212, 10 uM HCQ, or the indicated combinations. Shown are 48-hour immunoblots directed against the indicated proteins.

Hepatoma cells 24 h after plating were treated with vehicle (DMSO), regorafenib (REGO, 0.5 µM), PDE5 inhibitor (sildenafil, 2 µM); or the drugs in combination. 24 hours after treatment cells were isolated and viability determined by trypan blue (n=3, SEM). *P 0.05

Effect of blockade of p38 or MEK on MK2 activation following TLR stimulation in moDC. MoDC were pre-treated with p38 inhibitors SB203580 10 mM (S), BIRB0796 (B) 0.1 or 1.0 mM or MEK inhibitor UO126 10 mM (U) for 1hr followed by poly I:C/R848 stimulation for 30 min then Western blotted for p-MK2 with β-actin loading control.

 

Melanoma cell viability and in vivo growth by cyclindependent kinase 2/4 inhibition. Western blot analysis for c-Jun, phosphorylated-ERK1/2 (Thr202/Tyr204) (p-ERK1/2), and total ERK1/2 protein levels was done for human melanoma cell lines treated with the BRAFV600E inhibitor GDC-0879 (1 μM), or MEK inhibitors CI-1040 (1 μM), U0126 (1 μM), and PD98059 (10 μM) for 18 hours.

Immunoblots showing levels of phospho-MEK (p-MEK), total MEK (t-MEK), phospho-ERK1/2 (p-ERK1/2) and total ERK1/2 (t-ERK1/2) in A375 cells transduced with a retrovirus expressing BRAFV600E, BRAFV600E/L505H, BRAFV600E/F516G or BRAFV600E/T529N and treated with increasing doses of RAF265. α-tubulin (TUBA) was monitored as a loading control.

Enzymatic activity of RIP3 from Abcam, the concentration-effect relationship of RIP3 inhibition by the tested protein kinase inhibitors and the mode of action of RIP3 inhibition by dabrafenib. The RIP3 inhibition rates of AZ628 at different concentrations were measured by the luminescent RIP3 assay. The data (mean ?SD from 3 independent experiments) were presented as the Lineweaver-Burk plots using Graphpad Prism 5.

Cell morphology of BCPAP, K1 and 8505C cells treated and untreated with SB590885 using IC50 dose. Massive vacuolization is easily visible around the nuclei in treated cells.

Effect of inhibitors on EAP’s proliferation activity in NIH3T3 cell by MTT assay. Data are presented as mean ± SD of three independent experiments. **p50.01 versus EAP.

Involvement of EV linc-VLDLR in tumor cell responses to chemotherapy. Cells were incubated with sorafenib, camptothecin, or doxorubicin. EVs were obtained after 24 hours, and qRT-PCR was performed for linc-VLDLR. The bars represent the mean ?SEM of the increase in cell viability from 3 independent studies. *, P < 0.05.

 

 

Graph showing a concentration-dependent response of hypoxia-induced HIF-1α-NanoLuc activity to RAS-RAF-MEK-ERK pathway inhibitors: GDC-0994, PD-184352, selumetinib, TAK632, trametinib, and vemurafenib.

Whole cell lysates from NRAS- or BRAF-mutant melanoma cells treated with encorafenib or/and binimetinib or DMSO as a control for 24 h were subjected to Western blot analysis to detect pERK, ERK and β-Actin. Experiment shown is a representative of three independent experiments.

B, VE or VELV were transiently transfected in SKBR3 for 24 hours. Then, the cells were treated with 1 μmol/L lapatinib for 1 hour, followed by treatment with DMSO or the RAF inhibitors indicated for 1 hour (the dose for vemurafenib, PLX7904, LY3009120, TAK632, BGB3245, and BGB3290 is 1 μmol/L; the dose for dabrafenib and PLX8394 is 300 nmol/L). Untransfected (UT) SKBR3 cells were treated with DMSO or 1 μmol/L lapatinib (lanes 1 and 2)