EGFR

Effects of combined treatment with erlotinib and NPS-1034 in HCC827/ER cells with AXL activation. Lysates were immunoprecipitated with an anti-AXL antibody and immunoblotted with antibodies for phosphotyrosine (p-Tyr) and AXL. HCC827/ER cells were treated with erlotinib. E, erlotinib; N, NPS-1034. **, P < 0.001 for the combination of erlotinib plus NPS-1034 versus either the control or drug alone.

Perturbation of EGFR by its ligand EGF and gefitinib (ZD-1839 Iressat; inhibits EGFR) produces opposite responses in the predicted EGFR target genes SOCS2 and NR2E1.

Combination of NVP-AEW541 and lapatinib cooperatively inhibits the growth of NVP-AEW541 resistant murine rhabdomyosarcoma primary cell cultures with Igf1r/Her2 complexes. Cell viability assay for Naïve, untreated (U20325; A) and NVP-AEW541 innately resistant mouse rhabdomyosarcoma primary culture (U44676; B) treated with varying concentrations of NVP-AEW541, lapatinib, or a combination of both. Naïve cells (U20325) were sensitive to NVP-AEW541, but lapatinib had no cooperativity. In contrast, NVP-AEW541 at moderate doses increased cell growth in resistant cell cultures (U44676). However, this paradoxical effect was reduced by the addition of lapatinib, although lapatinib treatment alone had very little effect. C, the NVP-AEW541 resistant primary tumor cell line (U44676) was treated with DMSO, 5 μmol/L lapatinib, 5 μmol/L NVP-AEW541, and a combination of 5 μmol/L NVP-AEW541+lapatinib for 25 minutes and Western blot analysis was done on lysates for p-Igf1r and p-Her2.

Inhibition of signaling pathway activation in lung tumor cell lines by kinase inhibitors. Lung tumor cells were cultured in 10% FBS until reaching ∼80% confluence and then the cells were starved in serum-free medium for overnight, followed by 4-hour treatment with the inhibitors. Cell lysates were then prepared and used for determination of the pathway activation signals by the CEER assay.

C and D, in vivo subcutaneous tumor growth curves (C) and tumor weight quantification of intersected subcutaneous tumor tissues (D) of Huh7 cells after stable LHBs expression under saracatinib treatment (25 mg/kg body weight daily for 4 weeks; n =18). *, P < 0.05. E and F,in vivo subcutaneous tumor growth curves (E) and tumor weight quantification of intersected subcutaneous tumor tissues (F) of SK-Hep1 cells after stable LHBs expression under saracatinib treatment (25 mg/kg body weight daily for 4 weeks; n = 18). *, P < 0.05.

Vandetanib increases membrane localization of endothelial NO synthase (eNOS). MS1 endothelial cells (ECs) were incubated with 1 μmol/L of vandetanib or matched vehicle (dimethyl sulfoxide [DMSO]). Western blotting analysis showed that vandetanib increases membrane localization of eNOS compared with control (*P<0.04; n=4 per group, studies done in triplicate). These findings show that vandetanib increased the membrane localization of eNOS compared with control.

HER2 mutations V777L, D769H, V842I, G309A induce gain-of-function over HER2 WT in MCF10A mammary epithelial cells. B, HER2 WT, L755S, and del.755–759 cells were grown in Matrigel in the presence of DMSO vehicle (0.5%), neratinib (0.5  μmol/L) or gefitinib (0.5  μmol/L). Phase contrast images were obtained as in A. C,  MCF10A-HER2 WT or mutants were seeded in soft agar. After 7 days of growth, they were treated with DMSO vehicle (0.5%), lapatinib (0.5 μmol/L) or neratinib (0.5 μmol/L) for an additional week. Error bars represent 95% highest posterior density intervals. *, Significant difference between the HER2 mutant and HER2 WT; #, the effect of inhibitor treatment was significant (95% highest posterior density interval did not contain 0 for both).  D, photomicrographs of the colonies in soft agar on day 12, magnification ×40. 

(B–C) LNCaP (B) and LNCaP-AI (C) cells were transiently transfected with sPLA2-IIa(-800)-Luc (0.5 lg). The cells were then treated with Erlotinib (20 lM), Gefitinib (20 lM), Lapatinib (20 lM), CI-1033 (8 lM), LY294002 (20 lM) and Bortezomib (20 lM) without or with EGF (100 ng/ml) for 24 h. Luciferase assay was performed according to a standard protocol with Renilla luciferase as an internal control. Data are presented as the mean (±SD) of duplicate values of a representative experiment that was independently repeated for five times.

Aberrantly activated PI3K/AKT pathway mediates lapatinib resistance in SK-BR-3-LR cells. (A and B) After drug treatment, phosphorylation of HER2, EGFR, AKT, and ERK1/2 was determined by Western blotting using specific antibodies.

Inhibition of JAK1/2 with AG490 or STAT3 with S3I-201 leads to reduced STAT3 activation and reduced WASF3 levels. In contrast, treatment with Dasatinib (SRC inhibitor) or Gefitinib (EGFR inhibitor) does not significantly affect activated STAT3 or WASF3 levels

Antitum o r activity of WZ4002 and/or E7050 in mouse xenograft models of human tumors. SCID mice-bearing PC-9/Vec (A), PC-9/HGF#5 (B), H1975 (C), or HCC827ER (D) tumors were administered 25 mg/kg WZ4002 and/or E7050 once daily for 14 to 21 days. Tumor volume was measured using calipers on the indicated days. Mean?SE tumor volumes are shown for groups of 4 to 5 mice.

(a) Decay-corrected microPET/CT scan of MDA-MB-231 tumor bearing mice (n = 4) at 2, 4, and 24 h after i.v. injection of [64Cu]7. The image obtained with coinjection of CUDC-101 (20 mg/kg body weight) is shown for a 24 h blockade. Tumors are indicated by arrows. (b) Decay-corrected region-of interest (ROI) analysis on microPET images of the tumor uptake of [64Cu]7 with or without coinjection of CUDC-101 (20 mg/kg body weight). *, P < 0.05; **, P < 0.01.

A549 cells were treated with G15 (a specific antagonist of GPR30, 1 uM), AG1478 (a potent antagonist of EGFR, 10 uM), BPA (10^-5 M) alone for 15 min or BPA after a 90-min pretreatment with G15 or AG1478 for 15 min. Then the expression of p-ERK1/2 and total ERK1/2 were measured by western blot analysis.

IGF-1 and IL-1β mediated induction of Bcl-2 expression involves EGFR.   (A)  Bcl-2 mRNA levels in AALEBs treated with IGF-1 or IL-1β in the presence or absence of two EGFR tyrosine kinase inhibitors, EKB-569 (1 μM) or PD153035 (1 μM).  

HBMEC were preincubated with the indicated concentrations of either ErB1/2/4 inhibitor (Pelitinib; EKB-569), and cells were then infected for 4 h with the unencapsulated strain, MC58 siaD. The numbers of adherent (black bars) and invasive (gray bars) bacteria were determined in a gentamicin protection assay. The graphs show the percentages of adhesion and invasion of inhibitor-treated cells, relative to control cells (means 盨D of three independent experiments performed in duplicate). *, P < 0.05.

Co-treatments of PI-103 and EGFR inhibitors enhance cytotoxicity in SUM149PT cells. Cells were treated with 0.3 uM of PI-103 in combination with different concentrations (0.1 and 1 uM) of EGFR inhibitors (BMS-599626) for -72 hrs. Cell viability was measured by MTT assay as described in Materials and methods. Data from two independent experiments performed in triplicate are shown as mean+SEM. *P < 0.05; **P < 0.01; ***P < 0.001.

EGFR-SGLT1 interaction is irresponsive to modulators of EGFR’s tyrosine kinase. A: Immunoprecipitation coupled Western blot analysis ofinteractionsbetween EGFR-HA and SGLT1-FlaginHEK293 cells treatedwith EGF or AEE788. EGFR, total EGFR; pEGFR, phosphorylated EGFR; IP, immunoprecipitation; IB, immunoblot. Input, expression levels of indicated exogenous proteinsin HEK293 whole celllysates used for the IP.

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.

Mean plasma concentration vs. time after single-dose oral administration of  CCB and ERT in six Wistar rats.

T47D cells were pretreated with 100ng/ml EGF for 20 min and then treated with the indicated concentrations of  WZ3146 for 24 hours.

 

confluent 10cm plates, 24hour FBS starvation,  then treatment with compounds at 10nM for 30mins, followed by 5 minutes of 0.05ug/ml of EGF.  Pellet was sonicated (setting 5, 5 seconds, twice), then quenched with 2XGSB.  Loaded 10ul on AnyKD BioRad gel (20mins at 250V), transfered with BioRad Turbo system for 15 minutes (1.5A, 25V).  Blocked with 5% milk for 1 hour at RT.  Rocked overnight at 1:1000 in 5% BSA with primary Abs; Anti-rabbit secondary Ab at 1:2000 in 5% milk for 1 hour, developed with Thermo Femto Kit.

After starved in serum-free medium for 24h,A549 cells incubated with the indicated concentrations of WZ8040 for 3h,followed by 20-minute stimolation of 100ng/ml EGF.

Reversal effect of AST-1306 on the sensitivity of NCI-H460/MX20 cells to mitoxantrone. The figure showes the survival curves of cells at different concentrations of mitoxantrone with or without AST-1306. Cell viability was determined by MTT Assay. NCI-H460 is lung cancer cell line while NCI-H460/MX20 is ABCG2 overexpressing drug (mitoxantrone) selected cell line.

Western blot analysis of H1975 mock and H1975 EGFR cells treated with the indicated concentrations of EGF and rociletinib for phosphorylated (p-) and total (t-) EGFR, AKT, ERK1/2, and b-actin.

B. Effect of Icotinib treatment on the subcellular localization of ABCG2 in NCI-H460/MX20 cell. ABCG2 staining is shown in green. DAPI (blue) counterstains the nuclei. C. Effect of Icotinib on the ATPase activity of ABCG2: The BeFx-sensitive specific ATPase activity of ABCG2 was determined in the presence of 0-5 μM of Icotinib as described in supplemental methods. The activity in the absence of Icotinib (basal activity) was considered to be 100%, and % -fold stimulation ± S.D. (Y-axis) was plotted as a function of indicated concentrations of Icotinib (X-axis). D. Effect of Icotinib on the photolabeling of ABCG2 with [125I]-IAAP: Crude membranes from ABCG2 expressing MCF7-FLV1000 cells were photo-crosslinked with [125I]-IAAP in the presence and absence of 0-50 μM of Icotinib as described in supplemental methods. [125I]-IAAP incorporated in ABCG2 band was quantified using ImageQuant software and plotted as % [125I]-IAAP incorporated ± S.D. (Y-axis) as a function of varying concentration of Icotinib (X-axis). The upper panel shows a representative autoradiogram from three independent experiments and the arrow represents the ABCG2 band photo-crosslinked with [125I]-IAAP.

Reversal effect of WHI-P154 on the sensitivity of NCI-H460/MX20 cells to mitoxantrone. The figure showes the survival curves of cells at different concentrations of mitoxantrone with or without WHI-P154. Cell viability was determined by MTT Assay. NCI-H460 is lung cancer cell line while NCI-H460/MX20 is ABCG2 overexpressing drug (mitoxantrone) selected cell line.

C57/BL6 mice (5 mice/group) were intraperitoneally injected with daphnetin (DFN, 5 mg/kg) or DMSO, and then challenged with LPS (37.5 mg/kg) or saline. 16 h after LPS challenge, mice were sacrificed, and then lung and serum were collected. c, Representative photomicrographs showed H&E staining of lung tissue.

(B) Immunohistochemical staining for α-actinin and EdU showed that EGFR inhibitor (PD-168393), JNK inhibitor (sp-600125), and SP-1 inhibitor (mithramycin A) could abolish the effect of TIMP-3 siRNA in promoting cardiomyocyte proliferation. n=3 per group for Western blot. At least 2000 cells were quantified in each group. Data are shown as mean±SEM and reflect at least three independent experiments. Scale bar: 100 μm. *, P<0.05, ***, P<0.001 versus respective control.

d) Western blots for phosphorylation of epidermal growth factor receptor (EGFR) and MET, cleaved PARP as an apoptotic marker, and b-actin in HCC827 and their resistant clones. Total cell lysates were extracted 24 h after exposure of DMSO, 0.5 μM erlotinib, 0.5 μM CNX-2006, PHA-665752 and their combinations.

Western blot analysis for total (t-) and phosphorylated (p-) EGFR, AKT, ERK1/2, and β actin in H1975 parental and resistant (COR#3, AZDR#1) cells.

C, EGFR L718Q and L844V Ba/F3 cells retain sensitivity to irreversible quinazoline EGFR inhibitors. Cells were treated with different drugs at the indicated concentrations, and viable cells were measured after 72 hours of treatment and plotted relative to untreated controls. For Western blot analysis, 3T3 cells expressing the respective constructs were treated with different drugs at indicated concentrations for 16 hours. Cell extracts were immunoblotted to detect the indicated proteins. D, EGFR Del 1/L718Q Ba/F3 cells have a growth disadvantage. Equal number of cells was seeded in the presence of or absence of EGF or IL3. Cell number was evaluated in triplicate at the indicated time points.

Effects of combined treatment with erlotinib and NPS-1034 in HCC827/ER cells with AXL activation. Lysates were immunoprecipitated with an anti-AXL antibody and immunoblotted with antibodies for phosphotyrosine (p-Tyr) and AXL. HCC827/ER cells were treated with erlotinib. E, erlotinib; N, NPS-1034. **, P < 0.001 for the combination of erlotinib plus NPS-1034 versus either the control or drug alone.

Inhibition of signaling pathway activation in lung tumor cell lines by kinase inhibitors. Lung tumor cells were cultured in 10% FBS until reaching ∼80% confluence and then the cells were starved in serum-free medium for overnight, followed by 4-hour treatment with the inhibitors. Cell lysates were then prepared and used for determination of the pathway activation signals by the CEER assay.

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.

After starved in serum-free medium for 24h, A549 cells incubated with the indicated concentrations of Chrysophanic acid for 3h,followed by 15-minute stimolation of 100ng/ml EGF

Mice showed progression disease to first-line treatment were randomized 1:1 to the two arms of treatment and were treated until onset of progression disease or until the end-time of experiment in case of response (fixed to 52 weeks from the start of first-line therapy ), as indicated in in the Materials and Methods section. Growth curves of HCC827 xenografts treated in secondline with osimertinib plus selumetinib or cetuximab are represented as changes in the values of volumes as percentage compared to baseline tumor volume at the time of progression diasease to first-line (defined as 100%) for each case. Median tumor volume at PD2 was of 348 mm³.

Effects of combined treatment with erlotinib and NPS-1034 in HCC827/ER cells with AXL activation. Lysates were immunoprecipitated with an anti-AXL antibody and immunoblotted with antibodies for phosphotyrosine (p-Tyr) and AXL. HCC827/ER cells were treated with erlotinib. E, erlotinib; N, NPS-1034. **, P < 0.001 for the combination of erlotinib plus NPS-1034 versus either the control or drug alone.

Perturbation of EGFR by its ligand EGF and gefitinib (ZD-1839 Iressat; inhibits EGFR) produces opposite responses in the predicted EGFR target genes SOCS2 and NR2E1.

Combination of NVP-AEW541 and lapatinib cooperatively inhibits the growth of NVP-AEW541 resistant murine rhabdomyosarcoma primary cell cultures with Igf1r/Her2 complexes. Cell viability assay for Naïve, untreated (U20325; A) and NVP-AEW541 innately resistant mouse rhabdomyosarcoma primary culture (U44676; B) treated with varying concentrations of NVP-AEW541, lapatinib, or a combination of both. Naïve cells (U20325) were sensitive to NVP-AEW541, but lapatinib had no cooperativity. In contrast, NVP-AEW541 at moderate doses increased cell growth in resistant cell cultures (U44676). However, this paradoxical effect was reduced by the addition of lapatinib, although lapatinib treatment alone had very little effect. C, the NVP-AEW541 resistant primary tumor cell line (U44676) was treated with DMSO, 5 μmol/L lapatinib, 5 μmol/L NVP-AEW541, and a combination of 5 μmol/L NVP-AEW541+lapatinib for 25 minutes and Western blot analysis was done on lysates for p-Igf1r and p-Her2.

Inhibition of signaling pathway activation in lung tumor cell lines by kinase inhibitors. Lung tumor cells were cultured in 10% FBS until reaching ∼80% confluence and then the cells were starved in serum-free medium for overnight, followed by 4-hour treatment with the inhibitors. Cell lysates were then prepared and used for determination of the pathway activation signals by the CEER assay.

C and D, in vivo subcutaneous tumor growth curves (C) and tumor weight quantification of intersected subcutaneous tumor tissues (D) of Huh7 cells after stable LHBs expression under saracatinib treatment (25 mg/kg body weight daily for 4 weeks; n =18). *, P < 0.05. E and F,in vivo subcutaneous tumor growth curves (E) and tumor weight quantification of intersected subcutaneous tumor tissues (F) of SK-Hep1 cells after stable LHBs expression under saracatinib treatment (25 mg/kg body weight daily for 4 weeks; n = 18). *, P < 0.05.

Vandetanib increases membrane localization of endothelial NO synthase (eNOS). MS1 endothelial cells (ECs) were incubated with 1 μmol/L of vandetanib or matched vehicle (dimethyl sulfoxide [DMSO]). Western blotting analysis showed that vandetanib increases membrane localization of eNOS compared with control (*P<0.04; n=4 per group, studies done in triplicate). These findings show that vandetanib increased the membrane localization of eNOS compared with control.

HER2 mutations V777L, D769H, V842I, G309A induce gain-of-function over HER2 WT in MCF10A mammary epithelial cells. B, HER2 WT, L755S, and del.755–759 cells were grown in Matrigel in the presence of DMSO vehicle (0.5%), neratinib (0.5  μmol/L) or gefitinib (0.5  μmol/L). Phase contrast images were obtained as in A. C,  MCF10A-HER2 WT or mutants were seeded in soft agar. After 7 days of growth, they were treated with DMSO vehicle (0.5%), lapatinib (0.5 μmol/L) or neratinib (0.5 μmol/L) for an additional week. Error bars represent 95% highest posterior density intervals. *, Significant difference between the HER2 mutant and HER2 WT; #, the effect of inhibitor treatment was significant (95% highest posterior density interval did not contain 0 for both).  D, photomicrographs of the colonies in soft agar on day 12, magnification ×40. 

(B–C) LNCaP (B) and LNCaP-AI (C) cells were transiently transfected with sPLA2-IIa(-800)-Luc (0.5 lg). The cells were then treated with Erlotinib (20 lM), Gefitinib (20 lM), Lapatinib (20 lM), CI-1033 (8 lM), LY294002 (20 lM) and Bortezomib (20 lM) without or with EGF (100 ng/ml) for 24 h. Luciferase assay was performed according to a standard protocol with Renilla luciferase as an internal control. Data are presented as the mean (±SD) of duplicate values of a representative experiment that was independently repeated for five times.

Aberrantly activated PI3K/AKT pathway mediates lapatinib resistance in SK-BR-3-LR cells. (A and B) After drug treatment, phosphorylation of HER2, EGFR, AKT, and ERK1/2 was determined by Western blotting using specific antibodies.

Inhibition of JAK1/2 with AG490 or STAT3 with S3I-201 leads to reduced STAT3 activation and reduced WASF3 levels. In contrast, treatment with Dasatinib (SRC inhibitor) or Gefitinib (EGFR inhibitor) does not significantly affect activated STAT3 or WASF3 levels

Antitum o r activity of WZ4002 and/or E7050 in mouse xenograft models of human tumors. SCID mice-bearing PC-9/Vec (A), PC-9/HGF#5 (B), H1975 (C), or HCC827ER (D) tumors were administered 25 mg/kg WZ4002 and/or E7050 once daily for 14 to 21 days. Tumor volume was measured using calipers on the indicated days. Mean?SE tumor volumes are shown for groups of 4 to 5 mice.

(a) Decay-corrected microPET/CT scan of MDA-MB-231 tumor bearing mice (n = 4) at 2, 4, and 24 h after i.v. injection of [64Cu]7. The image obtained with coinjection of CUDC-101 (20 mg/kg body weight) is shown for a 24 h blockade. Tumors are indicated by arrows. (b) Decay-corrected region-of interest (ROI) analysis on microPET images of the tumor uptake of [64Cu]7 with or without coinjection of CUDC-101 (20 mg/kg body weight). *, P < 0.05; **, P < 0.01.

A549 cells were treated with G15 (a specific antagonist of GPR30, 1 uM), AG1478 (a potent antagonist of EGFR, 10 uM), BPA (10^-5 M) alone for 15 min or BPA after a 90-min pretreatment with G15 or AG1478 for 15 min. Then the expression of p-ERK1/2 and total ERK1/2 were measured by western blot analysis.

IGF-1 and IL-1β mediated induction of Bcl-2 expression involves EGFR.   (A)  Bcl-2 mRNA levels in AALEBs treated with IGF-1 or IL-1β in the presence or absence of two EGFR tyrosine kinase inhibitors, EKB-569 (1 μM) or PD153035 (1 μM).  

HBMEC were preincubated with the indicated concentrations of either ErB1/2/4 inhibitor (Pelitinib; EKB-569), and cells were then infected for 4 h with the unencapsulated strain, MC58 siaD. The numbers of adherent (black bars) and invasive (gray bars) bacteria were determined in a gentamicin protection assay. The graphs show the percentages of adhesion and invasion of inhibitor-treated cells, relative to control cells (means 盨D of three independent experiments performed in duplicate). *, P < 0.05.

Co-treatments of PI-103 and EGFR inhibitors enhance cytotoxicity in SUM149PT cells. Cells were treated with 0.3 uM of PI-103 in combination with different concentrations (0.1 and 1 uM) of EGFR inhibitors (BMS-599626) for -72 hrs. Cell viability was measured by MTT assay as described in Materials and methods. Data from two independent experiments performed in triplicate are shown as mean+SEM. *P < 0.05; **P < 0.01; ***P < 0.001.

EGFR-SGLT1 interaction is irresponsive to modulators of EGFR’s tyrosine kinase. A: Immunoprecipitation coupled Western blot analysis ofinteractionsbetween EGFR-HA and SGLT1-FlaginHEK293 cells treatedwith EGF or AEE788. EGFR, total EGFR; pEGFR, phosphorylated EGFR; IP, immunoprecipitation; IB, immunoblot. Input, expression levels of indicated exogenous proteinsin HEK293 whole celllysates used for the IP.

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.

Mean plasma concentration vs. time after single-dose oral administration of  CCB and ERT in six Wistar rats.

T47D cells were pretreated with 100ng/ml EGF for 20 min and then treated with the indicated concentrations of  WZ3146 for 24 hours.

 

confluent 10cm plates, 24hour FBS starvation,  then treatment with compounds at 10nM for 30mins, followed by 5 minutes of 0.05ug/ml of EGF.  Pellet was sonicated (setting 5, 5 seconds, twice), then quenched with 2XGSB.  Loaded 10ul on AnyKD BioRad gel (20mins at 250V), transfered with BioRad Turbo system for 15 minutes (1.5A, 25V).  Blocked with 5% milk for 1 hour at RT.  Rocked overnight at 1:1000 in 5% BSA with primary Abs; Anti-rabbit secondary Ab at 1:2000 in 5% milk for 1 hour, developed with Thermo Femto Kit.

After starved in serum-free medium for 24h,A549 cells incubated with the indicated concentrations of WZ8040 for 3h,followed by 20-minute stimolation of 100ng/ml EGF.

Reversal effect of AST-1306 on the sensitivity of NCI-H460/MX20 cells to mitoxantrone. The figure showes the survival curves of cells at different concentrations of mitoxantrone with or without AST-1306. Cell viability was determined by MTT Assay. NCI-H460 is lung cancer cell line while NCI-H460/MX20 is ABCG2 overexpressing drug (mitoxantrone) selected cell line.

Western blot analysis of H1975 mock and H1975 EGFR cells treated with the indicated concentrations of EGF and rociletinib for phosphorylated (p-) and total (t-) EGFR, AKT, ERK1/2, and b-actin.

B. Effect of Icotinib treatment on the subcellular localization of ABCG2 in NCI-H460/MX20 cell. ABCG2 staining is shown in green. DAPI (blue) counterstains the nuclei. C. Effect of Icotinib on the ATPase activity of ABCG2: The BeFx-sensitive specific ATPase activity of ABCG2 was determined in the presence of 0-5 μM of Icotinib as described in supplemental methods. The activity in the absence of Icotinib (basal activity) was considered to be 100%, and % -fold stimulation ± S.D. (Y-axis) was plotted as a function of indicated concentrations of Icotinib (X-axis). D. Effect of Icotinib on the photolabeling of ABCG2 with [125I]-IAAP: Crude membranes from ABCG2 expressing MCF7-FLV1000 cells were photo-crosslinked with [125I]-IAAP in the presence and absence of 0-50 μM of Icotinib as described in supplemental methods. [125I]-IAAP incorporated in ABCG2 band was quantified using ImageQuant software and plotted as % [125I]-IAAP incorporated ± S.D. (Y-axis) as a function of varying concentration of Icotinib (X-axis). The upper panel shows a representative autoradiogram from three independent experiments and the arrow represents the ABCG2 band photo-crosslinked with [125I]-IAAP.