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The hydroxamate-based metalloprotease inhibitor TAPI-2 bounds to hmeprin with inhibition constants IC50 20±10 μM for hmeprin β subunit and 1.5±0.27 nM for hmeprin α subunit. Generally, hmeprin α is inhibited more strongly than the β subunit. Without affecting ADAM17 expression, TAPI-2 dramatically decreases the protein levels of NICD and its downstream target HES-1 in both HCP-1 and HT29 cells. Moreover, treating cells with TAPI-2 significantly decreases the CSC phenotype by ∼50% in both CRC cell lines. The dose-dependent effects of TAPI-2 on the sphere formation and protein levels of NICD and HES-1 confirm that the concentration used (20 μM) is within the effective dose range of TAPI-2 (5–40 μM).
| Cell Experiment | |
|---|---|
| Cell lines | HEK293T cells |
| Preparation method | TAPI-2 is dissolved in DMSO and diluted with appropriate medium before use. All experiments are performed using 20 μM TAPI-2. Cells are cultured with or without TAPI-2 for 48 hours and then seeded at 3,000 cells per well in 96-well plates. |
| Concentrations | 20 μM |
| Incubation time | 48 h |
| Animal Experiment | |
|---|---|
| Animal models | |
| Formulation | |
| Dosages | |
| Administration | |
| Molecular Weight | 415.53 |
| Formula | C19H37N5O5 |
| CAS Number | 187034-31-7 |
| Solubility (25°C) | 22 mg/mL in DMSO |
| Storage |
Powder -20°C 3 years ; 4°C 2 years In solvent -80°C 6 months ; -20°C 1 month |
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