Second-Generation Highly Potent and Selective Inhibitors of the Hepatitis C Virus NS3 Serine Protease
摘要:
The hepatitis C virus (HCV) infection is a leading cause of chronic liver disease. The moderate efficacy along with side effects of the current pegylated interferon and ribavirin combination therapy underscores the need for more effective and safer new treatment. In an effort to improve upon our current clinical candidate, Boceprevir (SCH 503034), extensive SAR studies were performed on the P3 capping moieties. This led to the discovery of tert-leucinol derived cyclic imides as a potent series of novel P3 capping groups. Thus, the introduction of these imide caps improved the cell-based replicon EC90 by more than 10-fold. A number of imides with various substitutions, ring sizes, bicyclic systems, and heterocyclic rings were explored. The 4,4-dimethyl substituted glutarimide emerged as the best cap as exemplified in compound 21 (K-i* = 4 nM, EC90 = 40 nM). Systematic optimization of different positions (P', P3, and P1) of the inhibitor resulted in the identification of the lead compound 46, which had an excellent potency (K-i* = 4 nM, EC90 = 30 nM) and good pharmacokinetic profile (22% and 35% bioavailability in rats and dogs, respectively). X-ray structure of inhibitor 46 bound to the enzyme revealed that there was an additional hydrogen bonding interaction between one of the imide carbonyls and Cys159.
Methods of treating hepatitis C are provided comprising using a therapeutically effective amount of at least one novel hepatitis C (“HCV”) protease inhibitor or, alternatively, at least one antiviral or immuno-modulating HCV agent, which is not an HCV protease inhibitor, for a first treatment period. Subsequently, a combination of the at least one novel hepatitis C (“HCV”) protease inhibitor and the at least one antiviral or immuno-modulating HCV agent are administered in a therapeutically effective amount for a second treatment period. The methods are provided for treating a wide variety of diseases, disorders and symptoms associated with hepatitis C virus by modulating the activity of HCV protease (for example HCV NS3/NS4a serine protease) in a subject.
Controlled-release dosage formulations including at least one compound of Formulae I to XXVI herein and a controlled-release carrier and methods of treatment using the same are provided.
提供了包括本文中的至少一种I到XXVI式化合物和控释载体的控释剂量制剂,以及使用它们的治疗方法。
Methods of treating hepatitis C virus
申请人:Albrecht K. Janice
公开号:US20060276407A1
公开(公告)日:2006-12-07
Compositions and therapeutic combinations are provided including at least one compound selected from the group consisting of compounds of Formulae I to XXVI as defined herein as well as methods of treatment, prevention or amelioration of one or more symptoms of hepatitis C, treating disorders associated with HCV virus, modulating activity of HCV protease, or inhibiting cathepsin activity in a subject using the same, in which the mean volume of distribution/bioavailability (Vd/F) of the compound as measured in the plasma of the subject is greater than about 1000 L.
Administration of HCV protease inhibitors in combination with food to improve bioavailability
申请人:Zhang Jenny
公开号:US20060281688A1
公开(公告)日:2006-12-14
Methods of treating, preventing or ameliorating one or more symptoms of hepatitis C in a subject comprising the step of administering at least one HCV protease inhibitor in combination with food are provided. Also provided are methods of increasing bioavailability of an HCV protease inhibitor and methods of increasing serum levels of an HCV protease inhibitor in a subject. All methods comprise adminstering at least one HCV protease inhibitor in combination with food, the at least one HCV protease inhibitor selected from the group consisting of compounds of Formulae I-XXVI, described herein. Administration of compounds of the present invention in combination with food provides improved bioavailability and increased peak serum levels of the compounds as compared to administration without food.
Pharmaceutical formulations and methods of treatment using the same
申请人:Malcolm A. Bruce
公开号:US20070010431A1
公开(公告)日:2007-01-11
Pharmaceutical formulations containing at least one compound of Formulae I-XXVI herein and at least one surfactant. Pharmaceutically acceptable carriers and excipients may also be included in the formulations. The formulations of the present invention are suited for use in single unit dosages.