Depeptidization efforts of the P(3)-P(2) region of P(3) capped alpha-ketoamide inhibitor of HCV NS3 serine protease 1 are reported. We clearly established that N-methylation of the P(2) nitrogen and modification of the P(2)' carboxylic acid terminus were essential for activity in the replicon assay.
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http://dx.doi.org/10.1016/j.bmcl.2005.12.013 | DOI Listing |
Curr Top Med Chem
February 2011
Istituto di Ricerche di Biologia Molecolare "P. Angeletti", Pomezia, Rome, Italy.
Hepatitis C virus (HCV) is a major cause of acute hepatitis and chronic liver disease, including cirrhosis and hepatocellular carcinoma (HCC). No vaccine is currently available to prevent hepatitis C, and the current standard of care (SOC) - pegylated interferon-α (PEG-IFN-α) in combination with ribavirin (RBV) - is only partially effective and it also presents side effects. Novel treatment options now under intensive development are focused on the discovery of inhibitors of HCV-specific enzymes.
View Article and Find Full Text PDFExpert Opin Ther Pat
September 2009
MS 3545, K15, Schering Plough Research Institute, , Kenilworth NJ 07033, USA.
Background: HCV NS3 is a serine protease that plays a pivotal role in catalyzing the cleavage of the single polyprotein encoded by HCV after infection of hepatocytes. Analysis of the X-ray crystal structure of the enzyme reveals a shallow catalytic site located on the surface of the protein, which has made development of inhibitors a formidable task. Attempts to discover leads by a traditional approach of screening of compound libraries have proved futile and, therefore, researchers have adopted a structure-based drug design.
View Article and Find Full Text PDFBioorg Med Chem
May 2007
Pfizer Global Research and Development, St. Louis Laboratories, Pfizer, Inc., 700 Chesterfield Parkway West, Chesterfield, MO 63017, USA.
The integrin alpha(v)beta(3) is expressed in a number of cell types and is thought to play a major role in several pathological conditions. Various small molecules that inhibit the integrin have been shown to suppress tumor growth and retinal angiogenesis. The tripeptide Arg-Gly-Asp (RGD), a common binding motif in several ligands that bind to alpha(v)beta(3), has been depeptidized and optimized in our efforts toward discovering a small molecule inhibitor.
View Article and Find Full Text PDFBioorg Med Chem Lett
March 2006
Schering-Plough Research Institute, 2015 Galloping Hill Road, Kenilworth, NJ 07033, USA.
Depeptidization efforts of the P(3)-P(2) region of P(3) capped alpha-ketoamide inhibitor of HCV NS3 serine protease 1 are reported. We clearly established that N-methylation of the P(2) nitrogen and modification of the P(2)' carboxylic acid terminus were essential for activity in the replicon assay.
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