US20130089626A1 - Treating Cancer with ATR Inhibitors - Google Patents
Treating Cancer with ATR Inhibitors Download PDFInfo
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- US20130089626A1 US20130089626A1 US13/633,114 US201213633114A US2013089626A1 US 20130089626 A1 US20130089626 A1 US 20130089626A1 US 201213633114 A US201213633114 A US 201213633114A US 2013089626 A1 US2013089626 A1 US 2013089626A1
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Definitions
- Pancreatic cancer is the tenth most common site of new cancers and is responsible for 6% of all cancer related deaths.
- the 5-year survival rate is less than 5% .
- Non-small cell lung cancer is the most common form of lung cancer, accounting for about 85% of all lung cancer cases. Most patients present with advanced stage III or IV NSCLC with a 5-year survival of 24% and 4% respectively. Because of the advanced nature of disease on presentation, surgical resection is often not an option. For the majority of patients therapy involves chemotherapy and/or radiation treatment. The selection of chemotherapy is highly variable based on disease stage, patient performance criteria and geographical regional preference. In most cases chemotherapy is based on a doublet that includes a platinating agent such as Cisplatin or carboplatin and a second cytotoxic drug such as gemcitabine, etoposide or taxotere.
- a platinating agent such as Cisplatin or carboplatin
- a second cytotoxic drug such as gemcitabine, etoposide or taxotere.
- therapy can include treatment with agents that target specific proteins that are mutated or disregulated such as ALK and EGFR (eg crizotinib, gefitinib and erlotinib).
- agents that target specific proteins that are mutated or disregulated such as ALK and EGFR (eg crizotinib, gefitinib and erlotinib).
- ALK and EGFR eg crizotinib, gefitinib and erlotinib.
- ATR (“ATM and Rad3 related”) kinase is a protein kinase involved in cellular responses to certain forms of DNA damage (eg double strand breaks and replication stress).
- ATR kinase acts with ATM (“ataxia telangiectasia mutated”) kinase and many other proteins to regulate a cell's response to double strand DNA breaks and replication stress, commonly referred to as the DNA Damage Response (“DDR”).
- DDR DNA Damage Response
- the DDR stimulates DNA repair, promotes survival and stalls cell cycle progression by activating cell cycle checkpoints, which provide time for repair. Without the DDR, cells are much more sensitive to DNA damage and readily die from DNA lesions induced by endogenous cellular processes such as DNA replication or exogenous DNA damaging agents commonly used in cancer therapy.
- Healthy cells can rely on a host of different proteins for DNA repair including the DDR kinases ATR and ATM. In some cases these proteins can compensate for one another by activating functionally redundant DNA repair processes. On the contrary, many cancer cells harbour defects in some of their DNA repair processes, such as ATM signaling, and therefore display a greater reliance on their remaining intact DNA repair proteins which include ATR.
- ATR has been implicated as a critical component of the DDR in response to disrupted DNA replication. As a result, these cancer cells are more dependent on ATR activity for survival than healthy cells. Accordingly, ATR inhibitors may be useful for cancer treatment, either used alone or in combination with DNA damaging agents, because they shut down a DNA repair mechanism that is more important for cellular survival in many cancer cells than in healthy normal cells.
- ATR inhibitors may be effective both as single agents and as potent sensitizers to radiotherapy or genotoxic chemotherapy.
- hypoxic cancer cells are known to be resistant to treatment, most notably IR treatment, and are highly aggressive.
- components of the DDR can be activated under hypoxic conditions and it has also been shown that hypoxic cells are more reliant on components of the DDR for survival.
- This invention relates to uses of ATR inhibitors for treating pancreatic cancer and non-small cell lung cancer.
- this invention relates to methods of treating pancreatic cancer in a patient (e.g., a human) with an ATR inhibitor in combination with gemcitabine and/or radiation therapy.
- Applicants have demonstrated synergistic efficacy of ATR inhibitors in combination with gemcitabine and/or radiation therapy in clonogenic and viability assays on the pancreatic cancer cell lines, (e.g. PSN-1, MiaPaCa-2 and Panc-1) as well as in a primary tumor line (e.g., Panc-M).
- Disruption of ATR activity was measured by assessing DNA damage induced phosphorylation of Chk1 (Ser 345) and by assessing DNA damage foci and RAD51 foci following irradiation.
- non-small cell lung cancer With respect to non-small cell lung cancer, his invention relates to methods of treating non-small cell lung cancer with an ATR inhibitor in combination with cisplatin or carboplatin, etoposide, and ionizing radiation.
- Applicants have demonstrated synergy of ATR inhibitors in combination with cisplatin, etoposide, gemcitabine, oxaplatin and irinotecan in viability assays against a panel of 35 human lung cancer cell lines as well as demonstrated in vivo efficacy in a lung cancer mouse model in combination with cisplatin.
- FIG. 1 VE-821 radiosensitises pancreatic tumour cells.
- Cells were treated with 100 nM gemcitabine for 1 h, 1 ⁇ M VE-821 was added 1 h later and cells were irradiated (6 Gy) 1 h after that. Drugs were left for the duration of the experiment and cells were lysed at 2 h post-irradiation and subjected to Western blot analysis.
- VE-821 radiosensitizes pancreatic tumour cells but not normal fibroblasts.
- PSN-1, Panc-1, MiaPaCa-2 pancreatic cancer cell lines and MRC5 fibroblasts were treated with increasing concentrations of VE-821 for 96 h combined with or without 4 Gy radiation at 1 h after VE-821 addition.
- Cell viability was measured after 8 days and shown as normalized to DMSO-treated cells.
- PSN-1 cells were plated as single cells, treated with 1 ⁇ M VE-821 at different time points in relation to 4 Gy irradiation and assessed for colony formation after 10 days.
- the survival fraction at 4 Gy for each of the treatment schedules was determined by taking into account the relevant plating efficiency of unirradiated cells.
- FIG. 2 VE-821 radiosensitises pancreatic tumour cells under hypoxic conditions.
- FIG. 3 VE-821 sensitises pancreatic cancer cells to gemcitabine treatment.
- Cells were treated with increasing concentrations of gemcitabine for 24 h followed by 72 h treatment of 1 ⁇ M VE-821. Colony forming ability was assessed after 10 to 21 days.
- FIG. 4 VE-821 perturbs the irradiation-induced cell cycle checkpoint in pancreatic cancer cells.
- VE-821 (1 ⁇ M) was added 1 h prior to 6 Gy irradiation and left for the duration of the experiment.
- FIG. 5 VE-821 increases 53BP1 and ⁇ H2AX foci number and reduces RAD51 foci formation.
- FIG. 1 Effect of VE-821 incubation time on plating efficiency.
- PSN-1 cells were plated as single cells, treated with 1 uM VE-821 for various time periods and assessed for colony formation after 10 days.
- VE-821 perturbs the irradiation-induced G2/M checkpoint in pancreatic cancer cells in hypoxic conditions.
- VE-821 was added 1 h prior to irradiation (6 Gy).
- FIG. 1X Dose response relationship for radiosensitivity induced by Compounds 821, 822, 823, and 824.
- FIG. 2X Assessment of radiosensitivity in tumour cells and normal cells.
- FIG. 3X Assessment of dependency of drug addition and removal timing on radiosensitivity.
- MiaPaca cells were plated at low densities and drug was added at various time points in relation to the 4Gy radiation treatment: 1 h prior to IR, 5 min after IR, 2 h or 4 h after IR; and removed at various time points: 5 min after, 1 h after, or 19 h after IR. Clonogenic survival was assessed after 14 days. Results are shown as the surviving fraction at 4Gy (top panel) or the percentage radiosensitisation (middle panel) compared to the DMSO-treated cells. The different treatment schedules did not cause differences in plating efficiency (bottom panel).
- FIG. 4X DNA damage foci analysis after Compound 822 treatment and irradiation.
- FIG. 5X Cell cycle analysis of Compound 822-treated cells after 6Gy irradiation.
- PSN1 cells were treated with 40 nM Compound 822 1 h prior to 6Gy irradiation in triplicate wells. Cells were lifted and fixed at several time points after IR, stained with propidium iodide and analysed by flow cytometry.
- FIG. 6X MiaPaCa Tumor Volume over Time for Compound 822.
- FIG. 1Y Lung Cancer Cell Screen: VE-822 Synergizes with Chemotoxics Across a Panel of Lung Cancer Cell Lines in Lung Cell Viability Assay
- FIG. 2Y Lung Cancer Cell Screen: VE-822 Exhibits Greater than 3-fold Synergy with Chemotoxics in Lung Cancer Cell Lines in a Cell Viability Assay
- FIG. 4Y Pancreatic Cancer Cell Screen: VE-822 Exhibits Greater than 3-fold Synergy with Chemotoxics in Pancreatic Cancer Cell Lines a Cell Viability Assay
- FIG. 5Y Effect of VE-822 and cisplatin on tumor volume and body weight in a primary adenocarcinoma NSCLC xenograft in SCID mice.
- FIG. 6Y Effect of VE-822 administered PO q2d at 10, 30 or 60 mg/kg in combination with gemcitabine (15 mg/kg IP q3d) on the tumor volume of mice bearing PSN1 pancreatic cancer xenografts.
- ATR inhibitors examples are shown in Table 1 below:
- Another aspect provides a method of treating pancreatic cancer by administering to pancreatic cancer cells an ATR inhibitor selected from a compound in Table 1 in combination with one or more cancer therapies.
- the ATR inhibitor is combined with chemoradiation, chemotherapy, and/or radiation therapy.
- chemoradiation refers to a treatment regime that includes both chemotherapy (such as gemcitabine) and radiation.
- the chemotherapy is gemcitabine.
- Yet another aspect provides a method of increasing the sensitivity of pancreatic cancer cells to a cancer therapy selected from gemcitabine or radiation therapy by administering an ATR inhibitor selected from a compound in Table 1 in combination with the cancer therapy.
- the cancer therapy is gemcitabine. In other embodiments, the cancer therapy is radiation therapy. In yet another embodiment the cancer therapy is chemoradiation.
- Another aspect provides a method of inhibiting phosphorylation of Chk1 (Ser 345) in a pancreatic cancer cell comprising administering an ATR inhibitor selected from a compound in Table 1 after treatment with gemcitabine (e.g., 100 nM) and/or radiation (e.g., 6 Gy) to a pancreatic cancer cell.
- an ATR inhibitor selected from a compound in Table 1 after treatment with gemcitabine (e.g., 100 nM) and/or radiation (e.g., 6 Gy) to a pancreatic cancer cell.
- Another aspect provides method of radiosensitizing hypoxic PSN-1, MiaPaCa-2 or PancM tumor cells by administering an ATR inhibitor selected from a compound in Table 1 to the tumor cell in combination with radiation therapy.
- Yet another aspect provides a method of sensitizing hypoxic PSN-1, MiaPaCa-2 or PancM tumor cells by administering an ATR inhibitor selected from a compound in Table 1 to the tumor cell in combination with gemcitabine.
- Another aspect provides a method of sensitizing PSN-1 and MiaPaCa-2 tumor cells to chemoradiation by administering an ATR inhibitor selected from a compound in Table 1 to the tumor cells in combination with chemoradiation.
- Another aspect provides a method of disrupting damage-induced cell cycle checkpoints by administering an ATR inhibitor selected from a compound in Table 1 in combination with radiation therapy to a pancreatic cancer cell.
- Another aspect provides a method of inhibiting repair of DNA damage by homologous recombination in a pancreatic cancer cell by administering an ATR inhibitor selected from a compound in Table 1 in combination with one or more of the following treatments: chemoradiation, chemotherapy, and radiation therapy.
- the chemotherapy is gemcitabine.
- Another aspect provides a method of inhibiting repair of DNA damage by homologous recombination in a pancreatic cancer cell by administering an ATR inhibitor selected from a compound in Table 1 in combination with gemcitabine and radiation therapy.
- the pancreatic cancer cells are derived from a pancreatic cell line selected from PSN-1, MiaPaCa-2 or Panc-1.
- the pancreatic cancer cells are in a cancer patient. In other embodiments, the cancer cells are part of a tumor.
- Another embodiment provides methods for treating non-small cell lung cancer in a patient by administering to the patient an ATR inhibitor in combination with other known non-small cell lung cancer treatments.
- One aspect of the invention includes administering to a patient an ATR inhibitor in combination with cisplatin or carboplatin, etoposide, and/or ionizing radiation.
- Another aspect provides a method of treating non-small cell lung cancer by administering to a patient an ATR inhibitor selected from a compound in Table 1 in combination with one or more cancer therapies.
- the ATR inhibitor is combined with chemoradiation, chemotherapy, and/or radiation therapy.
- chemoradiation refers to a treatment regime that includes both chemotherapy (such as cisplatin, carboplatin, or etoposide) and radiation.
- the chemotherapy comprises Cisplatin or carboplatin, and etoposide.
- Yet another aspect provides a method of increasing the sensitivity of non-small cell lung cancer cells to a cancer therapy selected from cisplatin or carboplatin, etoposide, and ionizing radiation by administering to a patient an ATR inhibitor selected from a compound in Table 1 in combination with one or more cancer therapy.
- the cancer therapy is cisplatin or carboplatin. In other embodiments, the cancer therapy is radiation therapy. In yet another embodiment the cancer therapy is etoposide.
- the cancer therapy is a combination of cisplatin or carboplatin, etoposide, and ionizing radiation. In some embodiments the cancer therapy is cisplatin or carboplatin and etoposide. In other embodiments the cancer therapy is cisplatin or carboplatin and etoposide and ionizing radiation. In yet other embodiments the cancer therapy is cisplatin or carboplatin and ionizing radiation.
- Another aspect provides a method of inhibiting phosphorylation of Chk1 (Ser 345) in a non-small cell lung cancer cell comprising administering to a patient an ATR inhibitor selected from a compound in Table 1.
- the ATR inhibitor is administered in combination with gemcitabine (e.g., 100 nM), cisplatin or carboplatin, etoposide, ionizing radiation or radiation (e.g., 6 Gy) to a non-small cell lung cancer cell.
- the non-small cell lung cancer cells are in a cancer patient.
- the ATR inhibitor is N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl
- the ATR inhibitor is N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl
- Another aspect provides use of an ATR inhibitor selected from a compound in Table 1 in combination with gemcitabine and radiation therapy for treating pancreatic cancer.
- Another aspect provides use of an ATR inhibitor selected from a compound in Table 1 in combination with cisplatin or carboplatin, etoposide, and ionizing radiation for treating non-small cell lung cancer.
- the ATR inhibitor is Compound VI-821. In other embodiments, the ATR inhibitor is Compound VI-822.
- Another aspect provides use of an ATR inhibitor selected from a compound in Table 1 in combination with gemcitabine and radiation therapy for the manufacture of a medicament for treating pancreatic cancer.
- Another aspect provides use of an ATR inhibitor selected from a compound in Table 1 in combination with cisplatin or carboplatin, etoposide, and ionizing radiation for the manufacture of a medicament for treating non-small cell lung cancer.
- the ATR inhibitor is Compound VI-821. In other embodiments, the ATR inhibitor is Compound VI-822.
- MiaPaCa-2, PSN-1, Panc1 and MRC5 cells (5 ⁇ 104) were plated in 96-well plates and after 4 h treated with increasing concentrations of VE-821 at 1 h before irradiation with a single dose of 6 Gy. Medium was replaced 96 h post-irradiation at which point viability was measured using the using the Alamar Blue assay (Resazurin substrate, SIGMA). Cells were allowed to proliferate and cell viability was again analyzed at day 8 for the different treatment conditions. Cell viability and surviving fraction were normalized to the untreated (control) group.
- Logarithmically growing cells were plated in triplicate in 6-well tissue culture dishes under oxic (21% O 2 ) or hypoxic conditions (0.5% O 2 ) using an InVivo2 300 chamber (Ruskinn Technology, UK). Cells were incubated for 6 hours before irradiation under oxia or hypoxia using tightly sealed chambers. The target O 2 level was achieved within 6 h of gassing and maintained during irradiation, as confirmed by an OxyLite oxygen probe (Oxford Optronix). Cells irradiated under hypoxia were exposed to normoxia at 1 h post-irradiation.
- VE-821 (1 ⁇ M) was added 1 h prior to irradiation (6 Gy) and was washed away 72 h after irradiation.
- cells were initially exposed to increasing concentrations of gemcitabine (5, 10 and 20 nM) for 24 h before addition of the VE-821 (1 ⁇ M) for another 72 h.
- the effect of triple combination of irradiation with VE-821 and gemcitabine was examined as well. Cells were incubated for 10-21 days until colonies were stained with 0.5% crystal violet and counted in a CellCount automated colony counter (Oxford Optronix). Clonogenic survival was calculated and data were fitted in the GraphPad Prism 4.0 (GraphPad Software, CA).
- MiaPaCa-2 and PSN-1 cells were exposed to gemcitabine and/or 1 ⁇ M VE-821 drug 1 h prior to irradiation with a single dose of 6 Gy.
- Cells were lysed in RIPA buffer 2 h post-irradiation and subjected to SDS-PAGE electrophoresis and immunoblotting. Chemoluminescence (SuperSignal, Millipore) and film exposure was used to detect antibody binding. Exposed film was digitized and figures were assembled using Microsoft PowerPoint.
- Cells growing in 6-well dishes were treated with 1 ⁇ M VE-821 drug 1 h prior to 6 Gy irradiation. Cells were incubated for 6 h before irradiation under oxia (21% O 2 ) or hypoxia (0.5% O2) using tightly sealed chambers. At multiple time points, cells were lifted in trypsin and fixed in 70% ethanol and stored at 4° C. Cells were incubated with propidium iodide (50 ⁇ g/ml in PBS containing 200 ⁇ g/ml RNAse) for 1 h at room temperature and analysed by flow cytometry (FACSort, Becton Dickinson). Cell cycle phase was quantitated using ModFit Cell Cycle Analysis software.
- All cell lines were seeded in 30 ⁇ l of tissue culture medium containing 10% FBS into 384-well opaque-bottom assay plates. The seeding density was based on the logarithmic growth rate of each cell line. After 24 hours, compound stock solutions were added to each well to afford a matrix consisting of 5 concentrations for VE-822 and 6 concentrations for chemotoxics. Each well contains either, agent alone or a combination of both agents. The final concentration range for VE-822 was 25 nM-2 ⁇ M.
- the concentration ranges for the chemotoxics were as follows: Etoposide, 10 nM-10 ⁇ M; Gemcitabine, 0.16 nM-160 nM; Cisplatin, 20 nM-20 ⁇ M; Oxaliplatin, 40 nM-40 ⁇ M; Irinotecan (SN-38), 0.12 nM-120 nM.
- Etoposide 10 nM-10 ⁇ M
- Gemcitabine 0.16 nM-160 nM
- Cisplatin 20 nM-20 ⁇ M
- Oxaliplatin 40 nM-40 ⁇ M
- Irinotecan (SN-38) 0.12 nM-120 nM.
- the cells were then incubated for 96 hours at 37° C. in an atmosphere of 5% CO 2 and 95% humidity.
- All cell lines were seeded in 30 ⁇ l of tissue culture medium containing 10% FBS into 384-well opaque-bottom plates. The seeding density was based on the logarithmic growth rate of each cell line. After 24 hours, compound stock solutions were added to each well to afford a matrix consisting of 9 concentrations for VE-822 and 7 concentrations for Gemcitabine and Cisplatin. Each well contains either, agent alone or a combination of both agents. The final concentration ranges were as follows: VE-822, 0.3 nM-2 ⁇ M; Gemcitabine, 0.3 nM-0.22 ⁇ M; Cisplatin, 30 nM-20 ⁇ M. The cells were then incubated for 96 hours at 37° C. in an atmosphere of 5% CO 2 and 95% humidity.
- This assay measures the number of viable cells in a culture based on the quantitation of ATP, which is present in metabolically active cells.
- CellTiter-Glo Reagent (Promega, Madison, Wis., USA) was prepared according to the manufacturer's instructions and added 96 hours after compound addition (25 ⁇ l/well) to measure cell viability. Luminescence signal was measured with the PHERAStarFS (BMG Labtech, Cary, N.C., USA) automated plate reader. All cell lines were screened in duplicate.
- Raw luminescence CellTiter-Glo (CTG) values were normalized to the mean CTG value for the negative control DMSO-treated samples on each assay plate.
- IC 50 values for chemotoxic alone were calculated using DMSO-normalized cell survival values for the samples treated with chemotoxic compound alone.
- VE-822-treated chemotoxic IC 50 values were calculated using VE-822-normalized cell survival values for all samples treated with the chemotoxic at a given concentration of VE-822. A 3 ⁇ or greater reduction in IC 50 was used to identify strongly synergistic effects between VE-822 and chemotoxics.
- Tumor tissue was excised from a patient with a poorly differentiated adenocarcinoma. This tumor tissue was implanted subcutaneously in the flank of a SCID mouse and passaged twice before compound testing. For compound testing passage-two tumor tissue was implanted subcutaneously in the flank of SCID mice and tumors grown to a volume of about 200 mm 3 Cisplatin was dosed alone at either 1 or 3 mg/kg ip, once per week (ip, q7d, on day 2 of each week) for two weeks. VE-822 was dosed as a solution alone at 60 mg/kg po on 4 consecutive days per weekly cycle (qd4, dosed on days 1, 2, 3 and 4 each week).
- Two combination groups received cisplatin at 1 or 3 mg/kg plus VE-822 at 60 mg/kg po on the same schedule as the single agent group.
- a control group received vehicle alone (10% Vitamin E TPGS in water, po qd4). All drug treatment was stopped on Day 28. Vehicle, cisplatin (1 mg/kg) and VE-822 (60 mg/kg) groups were sacrificed and the remainder monitored for a further 40 days to assess tumor re-growth.
- PSN1 cells (1 ⁇ 10 6 cells per mouse) were implanted as a mixture in Matrigel (100 ⁇ l per mouse) into the flank of female nude MF1 mice and grown to a volume of about 200 mm 3 prior to compound administration.
- Gemcitabine was dosed alone at 15 mg/kg ip, once every three days (ip, q3d) in 0.5% methylcellulose in water for a maximum of 10 cycles.
- VE-822 was dosed, as a suspension in 0.5% methylcellulose in water, alone at either 10, 30 or 60 mg/kg po every other day for 28 days (po q2d).
- Three combination groups received gemcitabine at 15 mg/kg plus VE-822 either at 10, 30 or at 60 mg/kg po on the same schedule as the single agent groups.
- a control group received vehicle alone (0.5% methylcellulose ip q3d). All drug treatment was stopped on Day 30. Vehicle and VE-822 groups were sacrificed on day 13 due to excessive tumor volumes.
- Compound VI-821 inhibits phosphorylation of Chk1 (Ser 345) after treatment with gemcitabine (100 nM), radiation (6 Gy) or both (see FIG. 1A ).
- Compound VI-821 radiosensitises pancreatic tumour cells but not normal cells. When cells were irradiated in the presence of Compound VI-821, a decrease in surviving fraction was observed and this radiosensitising effect increased as the drug incubation time after irradiation was extended (see FIG. 1C ).
- Compound VI-821 radiosensitises tumour PSN-1, MiaPaCa-2 and PancM cells under hypoxic conditions (see FIG. 2A-B ). Compound VI-821 also sensitises normoxic and hypoxic cancer cells to gemcitabine (see FIG. 3B-C ). Compound VI-821 potentiates the effect of chemoradiation in both PSN-1 and MiaPaCa-2 cancer cells (see FIG. 3D ). Compound VI-821 disrupts damage-induced cell cycle checkpoints (see supplementary FIG. 2 ). Compound VI-821 inhibits repair of DNA damage by homologous recombination (see FIGS. 5A , 5 B, and 5 C).
- Results for Compounds 821 and 822 are shown in FIGS. 1X to 8X and 1 Y to 6 Y.
- VE-821 and VE-822 sensitize cancer cells to radiation therapy (see FIGS. 1X-5X ).
- VE-822 enhances the antitumor effects of ionizing radiation in a MiaPaCa pancreatic cancer xenograft model (see FIG. 6X ) and in a PSN-1 pancreatic cancer xenograft model (see FIGS. 7X and 8X ).
- VE-822 enhances the antitumor effects of cisplatin in a primary adenocarcinoma NSCLC xenograft model.
- Black filled circles are vehicle treatment; Red filled diamonds are Cisplatin treatment (1 mg/kg q7d); Blue filled diamonds are Cisplatin treatment (3 mg/kg q7d); Green filled squares are VE-822 treatment (60 mg/kg qd4); Green empty triangles are Cisplatin (1 mg/kg) and VE-822 (60 mg/kg qd4); Blue empty triangles are Cisplatin (3 mg/kg) and VE-822 (60 mg/kg qd4) (see FIG. 5Y ).
- VE-822 also enhances the antitumor effects of gemcitamine in a PSN1 pancreatic cancer xenograft model.
- Red filled circles are VE-822 treatment; Black filled squares are vehicle treatment; Green filled circles are gemcitabine treatment; Blue filled circles are gemcitabine and VE-822 (10 mg/kg) treatment; Red filled circles are gemcitabine and VE-822 (30 mg/kg) treatment; Pink filled circles are gemcitabine and VE-822 (60 mg/kg) treatment;
- VE-822 Synergizes with Chemotoxics Across a Panel of Lung Cancer Cell Lines
- the heat map represents the maximum shift in IC 50 of each chemotoxic achieved when combined with VE-822 for 96 hours. Colors represent an IC 50 shift range from ⁇ 10 (antagonism, blue) to 10 (synergy, red) (see FIG. 1Y ). VE-822 exhibits greater than 3-fold synergy with cisplatin, etoposide, gemcitabine, oxaplatin and irinotecan in lung cancer cell lines (see FIG. 2Y ).
- VE-822 Synergizes with Cisplatin and Gemcitabine in Pancreatic Cancer Cell Lines.
- the heat map represents the maximum shift in IC 50 of each chemotoxic achieved when combined with VE-822 for 96 hours. Colors represent an IC 50 shift range from ⁇ 10 (antagonism, blue) to 10 (synergy, red) (see FIG. 3Y ).
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