alexa Functional delivery of DNAzyme with iron oxide nanoparticles for hepatitis C virus gene knockdown.


Journal of Clinical & Cellular Immunology

Author(s): Ryoo SR, Jang H, Kim KS, Lee B, Kim KB,

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Abstract DNAzyme is an attractive therapeutic oligonucleotide which enables cleavage of mRNA in a sequence-specific manner and thus, silencing target gene. A particularly important challenge in achieving the successful down-regulation of gene expression is to efficiently deliver DNAzymes to disease sites and cells. Here, we report the nanoparticle-assisted functional delivery of therapeutic DNAzyme for the treatment of hepatitis C by inducing knockdown of hepatitis C virus (HCV) gene, NS3. HCV NS3 gene encodes helicase and protease which are essential for the virus replication. The nanocomplex showed efficient NS3 knockdown while not evoking undesired immune responses or notable cytotoxicity. We also demonstrated the DNAzyme conjugated nanoparticle system could be applicable in vivo by showing the accumulation of the nanoparticles in liver, and more specifically, in hepatocytes. We believe that the present work is a successful demonstration of effective, functional, non-immunostimulatory DNAzyme delivery system based on inorganic nanoparticles with high potential for further therapeutic application of DNAzyme in the treatment of hepatitis C. Copyright © 2011 Elsevier Ltd. All rights reserved. This article was published in Biomaterials and referenced in Journal of Clinical & Cellular Immunology

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