| ENMD-2076 has benn tested it on two different neurobiastoma cell lines(SK-N-BE(2) and CHP-134),being calculated the IC50 by a WST-1(Roche) proliferation assay, as shown in the table below. Its in vitro activity is in the micromolar range and has a comparable effect on both lines.VX-680 was used as standard, and it proved more potent on CHP-134 cells. |
| SDS-PAGE of CHP-134 cells extracts after 24 h exposure to the indicated drug and concentration. N-myc levels were evaluated and compared to beta actin used as house-keeping protein. Aurora A blockade seems to diminish N-myc expression or stability. |
| Western blot analysis of Histone and Aurora kinase. 0-10μM MK0457 was added. |
| B, BLQ1 and UCSF02 cells were treated with increasing concentrations of VX-680 for 48 hours. The percentage of apoptotic cells was determined by fluorescence-activated cell sorting analysis. C, BLQ1 cells were treated with 1 μmol/L VX-680 and cell cycle distribution was determined by flow cytometry at time points of 24 and 48 hours. |
| VX-680 eliminates Bcr/Abl kinase activities. BLQ1 (T315I mutation) and TXL2 (no mutation) cells were treated with the indicated concentrations of VX-680 with or without 100 nmol/L dasatinib for 24 hours. Western blot analysis was done on total lysates with the antibodies indicated to the left. Blots were stripped and reprobed with Bcr (N-20), Src, and GAPDH antibodies as loading controls. |
| Responses of human ALL cells to short-term VX-680 treatment. A, BLQ1 cells were treated with 1 μmol/L VX-680 for 3 days. After 3 days, the drug was removed from the medium and cells were cultured without VX-680. During this period (days 3–21) without drug, viability (top left), cell numbers (bottom left), and cell cycle distribution (right) of BLQ1 cells were assessed. B, BLQ1 and BLQ1-VX-Tx cells were cytospun onto glass slides and fixed, dried, and stained with Wright-Giemsa on day 21. All images are at ×63 magnification. C, BLQ1 and BLQ1-VX-Tx cells were treated with 1.5 μmol/L VX-680 or 5 nmol/L vincristine for 72 hours. Cell viability was measured by trypan blue exclusion. *, P < 0.05, vincristine-treated BLQ1 compared with vincristine-treated BLQ1-VX-Tx. |
| VX-680 and dasatinib synergize to induce cytotoxic activity in wild-type Bcr/Abl-positive human ALL cells. A, TXL2 and UCSF02 cells were exposed to 1 μmol/L VX-680 with or without 100 nmol/L dasatinib for 24 to 72 hours as indicated, after which the percentage of viable cells was determined by trypan blue exclusion. B, TXL2 cells were treated with or without VX-680 and dasatinib for 48 hours in triplicate. **, P < 0.001, VX-680 and dasatinib cotreated TXL2 compared with VX-680–treated or dasatinib alone–treated TXL2 cells. Apoptotic cells were defined by flow cytometry as Annexin V and propidium iodide (PI) double-positive cells. C, TXL2 cells were exposed to VX-680 and/or dasatinib and cell cycle distribution was assessed by flow cytometry. |
| (G) Nocodazole-arrested HeLa cells were treated with VX-680 and MG132 and stained for CENP-E (Green), pT422 (Red) and DNA (Blue). (H) pT422 fluorescence intensity was normalized to the total CENP-E fluorescence. Plots show the mean of > 15 cells per condition from two independent experiments. |