Tozasertib (VX-680, MK-0457) is a small-molecule Aurora kinase inhibitor. The Aurora kinases are essential for the regulation of chromosome segregation and cytokinesis during mitosis. Tozasertib (VX-680) blocks cell-cycle progression and induces apoptosis in a diverse range of human tumor types. Tozasertib (VX-680) effectively inhibits proliferation of several different cell lines of clear cell renal carcinoma (IC50s < 10 μM) and blocks the growth of tumors in a rodent model of cancer (80 mg/kg), inhibiting H3 histone phosphorylation, to an increase of apoptotic cells, and to morphological changes such as vacuolization and swelling of the cells and nuclei. The combination of VX-680 and histone deacetylase inhibitor SAHA had a synergistic effect on the proliferation of HUH6 cells. Tozasertib (VX-680) might improve treatment results in HB with increased Aurora kinase activity by inhibiting cell proliferation and induction of apoptosis.
J Hematol Oncol. 2017 Jun 8;10(1):115.
SIX3, a tumor suppressor, inhibits astrocytoma tumorigenesis by transcriptional repression of AURKA/B
Tozasertib purchased from AbMole
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Source | Journal of Hematology & Oncology (2017). Figure 7. VX680 (Abmole Bioscience) |
| Method | CCK8 assay | |
| Cell Lines | U251, U87 and U118 cell lines | |
| Concentrations | ||
| Incubation Time | 48 and 72 h | |
| Results | We found that the U251-SIX3 cells showed less sensitivity to VX680 compared with the U251-CON cells (Fig. 7a). With increased expression of AURKA or AURKB and reduced expression of SIX3, the p53 mutant U251 cells were more sensitive to VX680 treatment, compared with the p53 wild-type U87 cells (Fig. 7b). |
| Cell Experiment | |
|---|---|
| Cell lines | SW620, K562, HL-60, MIA PaCa-2 and HCT116 cells |
| Preparation method | Analysis of cell proliferation and viability. Tumor cells were seeded in 96-well plates and incubated with VX-680 for 96 h. To measure DNA synthesis, 0.5 mCi of [3H]thymidine was added to each well 3 h before the end of the experiment. Cells were then collected, and the incorporated radioactivity was counted on a Wallac microplate beta-counter. Cell viability was assessed using Promega CellTiter 96AQ to measure MTS (3-(4,5 dimethylthiazol-2-yl)-5-(3- carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium, inner salt) conversion. |
| Concentrations | 1~10 μM |
| Incubation time | 96 h |
| Animal Experiment | |
|---|---|
| Animal models | female athymic NCr-nu mice HL-60, MIA PaCa-2 and HCT116 cells tumour xenograft model |
| Formulation | 50% PEG 300 in 50 mM phosphate buffer |
| Dosages | q.4.d. at a dose of 12.5, 25, 50 and 75 mg/kg |
| Administration | i.v. |
| Molecular Weight | 464.59 |
| Formula | C23H28N8OS |
| CAS Number | 639089-54-6 |
| Solubility (25°C) | DMSO 75 mg/mL |
| Storage | 2-8°C, protect from light, dry, sealed |
| Species | Mouse | Rat | Rabbit | Guinea pig | Hamster | Dog |
| Weight (kg) | 0.02 | 0.15 | 1.8 | 0.4 | 0.08 | 10 |
| Body Surface Area (m2) | 0.007 | 0.025 | 0.15 | 0.05 | 0.02 | 0.5 |
| Km factor | 3 | 6 | 12 | 8 | 5 | 20 |
| Animal A (mg/kg) = Animal B (mg/kg) multiplied by | Animal B Km |
| Animal A Km |
For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.
| Related Aurora Kinase Products |
|---|
| Aurora Kinases-IN-4
Aurora Kinases-IN-4 is a covalent and ATP competitive aurora kinase A inhibitor (IC50: 1.7 nM). |
| Derrone
Derrone, a prenylated isoflavones, is an Aurora kinase inhibitor, with IC50 values of 6 and 22.3 μM against Aurora B and Aurora A, respectively. Derrone shows anti-tumor activity. |
| CD532 hydrochloride
CD532 hydrochloride is a potent Aurora A kinase inhibitor with an IC50 of 45 nM. CD532 hydrochloride has the dual effect of blocking Aurora A kinase activity and driving degradation of MYCN. CD532 hydrochloride also can directly interact with AURKA and induces a global conformational shift. CD532 hydrochloride can be used for the research of cancer. |
| Aurora kinase inhibitor-2
Aurora kinase inhibitor-2 is a selective and ATP-competitive Aurora kinase inhibitor with IC50s of 310 nM and 240 nM for Aurora A and Aurora B, respectively. |
| AAPK-25
AAPK-25 is a potent and selective Aurora/PLK dual inhibitor with anti-tumor activity, which can cause mitotic delay and arrest cells in a prometaphase, reflecting by the biomarker histone H3Ser10 phosphorylation and followed by a surge in apoptosis. AAPK-25 targets Aurora-A, -B, and -C with Kd values ranging from 23-289 nM, as well as PLK-1, -2, and -3 with Kd values ranging from 55-456 nM. |
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