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RO4929097 is a potent and selective inhibitor of gamma-secretase, with IC50 of 4 nM and also inhibits Aβ40 and ICN with EC50 of 14 nM and 5 nM, producing inhibitory activity of Notch signaling in tumor cells. RO4929097 inhibits Notch processing in tumor cells as measured by the reduction of intracellular Notch expression by Western blot. The RO4929097 IC50 in cell-free and cellular assays is in the low nanomolar range with >100-fold selectivity with respect to 75 other proteins of various types (receptors, ion channels, and enzymes). RO4929097 induced significant differences in event-free survival (EFS) distribution compared to control in 6 of 26 (23%) of the evaluable solid tumor xenografts and in 0 of 8 (0%) of the evaluable ALL xenografts. In human primary melanoma cell lines, RO4929097 decreased the levels of NOTCH transcriptional target HES1. Moreover, RO4929097 affected the growth of human primary melanoma xenograft in NOD/SCID/IL2gammaR-/- mice and inhibited subsequent tumor formation in a serial xenotransplantation model, suggesting that inhibition of NOTCH signaling suppresses the tumor initiating potential of melanoma cells. In addition, RO4929097 decreased tumor volume and blocked the invasive growth pattern of metastatic melanoma cell lines in vivo.
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Source | Anticancer Drugs (2015). Figure 2. RO4929097 |
| Method | MTS assay | |
| Cell Lines | NEM78 cells | |
| Concentrations | 3 μmol/l | |
| Incubation Time | 48 h | |
| Results | RO4929097 reduces Notch effectors expression and cellular density and shows antiproliferative activity in NEM78 ependymoma cells. |
| Molecular Weight | 469.4 |
| Formula | C22H20F5N3O3 |
| CAS Number | 847925-91-1 |
| Solubility (25°C) | DMSO 64 mg/mL |
| Storage | -20°C, sealed |
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