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Antiviral API
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Telaprevir
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| Category | HCV Protease |
| CAS | 402957-28-2 |
| Description | Telaprevir is a potent, selective, peptidomimetic inhibitor of the hepatitis C virus (HCV) NS3-4A serine protease, and it demonstrated excellent antiviral activity both in genotype 1b HCV replicon cells (50% inhibitory concentration [IC50] = 354 nM) and in human fetal hepatocytes infected with genotype 1a HCV-positive patient sera (IC50 = 280 nM). Telaprevir forms a covalent but reversible complex with the genotype 1a HCV NS3-4A protease in a slow-on, slow-off process with a steady-state inhibition constant (K(i)*) of 7 nM. Dissociation of the covalent enzyme-inhibitor complex of Telaprevir and genotype 1a HCV protease has a half-life of almost an hour. A >4-log10 reduction in the HCV RNA levels was observed after a 2-week incubation of replicon cells with Telaprevir, with no rebound of viral RNA observed after withdrawal of the inhibitor. In several animal species, Telaprevir exhibits a favorable pharmacokinetic profile with high exposure in the liver. In a recently developed HCV protease mouse model, Telaprevir showed excellent inhibition of HCV NS3-4A protease activity in the liver. |
Product Information
| Synonyms | Telavic; VRT 111950; VX 950; Incivek; Incivo; LY 570310; MP 424; S-Telaprevir; (1S,3aR,6aS)-(2S)-2-Cyclohexyl-N-(2-pyrazinylcarbonyl)glycyl-3-methyl-L-valyl-N-[(1S)-1-[2-(cyclopropylamino)-2-oxoacetyl]butyl]octahydrocyclopenta[c]pyrrole-1-carboxamide |
| IUPAC Name | (3S,3aS,6aR)-2-[(2S)-2-[[(2S)-2-cyclohexyl-2-(pyrazine-2-carbonylamino)acetyl]amino]-3,3-dimethylbutanoyl]-N-[(3S)-1-(cyclopropylamino)-1,2-dioxohexan-3-yl]-3,3a,4,5,6,6a-hexahydro-1H-cyclopenta[c]pyrrole-3-carboxamide |
| Molecular Weight | 679.85 |
| Molecular Formula | C36H53N7O6 |
| Canonical SMILES | CCCC(C(=O)C(=O)NC1CC1)NC(=O)C2C3CCCC3CN2C(=O)C(C(C)(C)C)NC(=O)C(C4CCCCC4)NC(=O)C5=NC=CN=C5 |
| InChI | InChI=1S/C36H53N7O6/c1-5-10-25(29(44)34(48)39-23-15-16-23)40-33(47)28-24-14-9-13-22(24)20-43(28)35(49)30(36(2,3)4)42-32(46)27(21-11-7-6-8-12-21)41-31(45)26-19-37-17-18-38-26/h17-19,21-25,27-28,30H,5-16,20H2,1-4H3,(H,39,48)(H,40,47)(H,41,45)(H,42,46)/t22-,24-,25-,27-,28-,30+/m0/s1 |
| InChIKey | BBAWEDCPNXPBQM-GDEBMMAJSA-N |
| Melting Point | 221-224°C (dec.) |
| Purity | ≥98% (HPLC) |
| Density | 1.3 g/cm3 |
| Solubility | Soluble in water (<1 mg/ml at 25 °C), DMSO (136 mg/mL at 25 °C), ethanol (<1 mg/ml at 25 °C) |
| Appearance | White Solid |
| Application | Oligopeptides |
| Storage | Powder: -20°C: 3 years 4°C: 2 years In solvent: -80°C: 6 months -20°C: 1 month |
| Complexity | 1240 |
| Exact Mass | 679.40573244 |
| Index Of Refraction | 1.584 |
| In Vitro | Telaprevir (VX-950) is a covalent, reversible inhibitor of the NS3-4A protease with a slow-binding and slow-dissociation mechanism. Telaprevir exhibits significantly different kinetics in enzyme inhibition, which is most clearly exemplified by a very long half-life (58 min) of the bound enzyme-inhibitor complex. Telaprevir is additive to moderately synergistic with IFN-α in inhibiting HCV replication and in suppressing the emergence of resistance in replicon cells. Telaprevir reduces HCV RNA levels in a time- and dose-dependent manner. The IC50s following a 24, 48, 72, and 120 h incubation with Telaprevir are determined to be 0.574, 0.488, 0.21, and 0.139 μM, respectively, indicating an increase in inhibitory effects with time. Following three independent experiments using the 48 h incubation in the presence of 2% FBS, the average IC50 of Telaprevir is determined to be 0.354 ± 0.035 μM, and the average IC90 is 0.830 ± 0.190 μM. Telaprevir (VX-950) is a potent, selective, peptidomimetic inhibitor of the hepatitis C virus (HCV) NS3-4A serine protease, and Telaprevir demonstrates excellent antiviral activity both in genotype 1b HCV replicon cells (IC50=354 nM) and in human fetal hepatocytes infected with genotype 1a HCV-positive patient sera (IC50=280 nM). |
| In Vivo | There is an ~5-fold reduction of serum SEAP activity in mice dosed with Telaprevir (VX-950) at either 10 or 25 mg/kg, which has an average value (±SEM) of 18.7±8.3% or 18.4±5.4%, respectively, compare to those administered vehicle (100±28%). These data demonstrates that Telaprevir is able to inhibit the HCV NS3-4A serine protease activity in mouse liver and block cleavage and subsequent secretion of SEAP into blood circulation in these mice. |
| PSA | 179.56000 |
| Target | Ki: 7 nM (genotype 1 HCV NS3-4A protease) |
| XLogP3-AA | 4.2 |
Description of First Aid Measures
Eye contact
Remove any contact lenses, locate eye-wash station, and flush eyes immediately with large amounts of water. Separate eyelids with fingers to ensure adequate flushing. Promptly call a physician.
Skin contactRinse skin thoroughly with large amounts of water. Remove contaminated clothing and shoes and call a physician.
InhalationImmediately relocate self or casualty to fresh air. If breathing is difficult, give cardiopulmonary resuscitation (CPR). Avoid mouth-to-mouth resuscitation.
IngestionWash out mouth with water; Do NOT induce vomiting; call a physician.