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Short synthetic hairpin RNAs (sshRNAs) (SG220 and SG273) that target the internal ribosome entry site of the hepatitis C virus (HCV) were formulated into lipid nanoparticles and administered intravenously to HCV-infected urokinase plasminogen activator–severe combined immunodeficient mice with livers repopulated with human hepatocytes (humanized livers). Weekly administration of 2.5 mg/kg of each...
Treatment and prevention of hepatitis C virus (HCV) infections remain a major challenge for controlling this worldwide health problem; existing therapies are only partially effective and no vaccine is currently available. RNA interference offers the potential of a novel therapeutic approach for treating HCV infections. Toward this end, we evaluated small hairpin interfering RNAs (shRNAs) targeting...
Efficient transfer of therapeutic genes into nondividing human cells can be accomplished by inserting the genes into lentiviruses and infecting the cells with the modified viruses. The most developed lentivirus gene transfer systems are based on HIV-1, but because of the widespread HIV epidemic, the use of HIV-based vectors for gene therapy may be associated with a safety risk. In an attempt to find...
Retroviral gene delivery systems for RNA polymerase II (RNA pol II)-based promoters have been developed and are widely used in gene transfer studies. In contrast, gene delivery systems with RNA pol III-based expression cassettes have not been studied comprehensively, although therapeutic applications (e.g., ribozymes, antisense, triplex RNA and RNA decoys) have been proposed. In this report, we describe...
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