Journal of Microbiology and Biotechnology

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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VEGF siRNA Delivery by a Cancer-Specific Cell-Penetrating Peptide

  • Lee, Young Woong (Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Hwang, Young Eun (Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST)) ;
  • Lee, Ju Young (Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Sohn, Jung-Hoon (Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Sung, Bong Hyun (Cell Factory Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB)) ;
  • Kim, Sun Chang (Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST))
  • Received : 2017.11.13
  • Accepted : 2017.12.11
  • Published : 2018.03.28
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Abstract

RNA interference provides an effective tool for developing antitumor therapies. Cell-penetrating peptides (CPPs) are delivery vectors widely used to efficiently transport small-interfering RNA (siRNA) to intracellular targets. In this study, we investigated the efficacy of the cancer-specific CPP carrier BR2 to specifically transport siRNA to cancer-target cells. Our results showed that BR2 formed a complex with anti-vascular endothelial growth factor siRNA (siVEGF) that exhibited the appropriate size and surface charge for in vivo treatment. Additionally, the BR2-VEGF siRNA complex exhibited significant serum stability and high levels of gene-silencing effects in vitro. Moreover, the transfection efficiency of the complex into a cancer cell line was higher than that observed in non-cancer cell lines, resulting in downregulated intracellular VEGF levels in HeLa cells and comprehensively improved antitumor efficacy in the absence of significant toxicity. These results indicated that BR2 has significant potential for the safe, efficient, and specific delivery of siRNA for diverse applications.

Keywords

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