RNAi Using a Chitosan/siRNA Nanoparticle System: In Vitro and In Vivo Applications

  • Morten Østergaard Andersen
  • Kenneth Alan Howard
  • Jørgen Kjems
Part of the Methods in Molecular Biology™ book series (MIMB, volume 555)


Delivery is a key issue in development of clinically relevant RNAi therapeutics. Polymeric nanoparticles formed by self-assembly of polycations with siRNA can be used for extracellular delivery, cellular uptake and intracellular trafficking as a strategy to improve the therapeutic potential of siRNA. This chapter describes a chitosan-based nanoparticle system for in vitro and in vivo transfection of siRNA into cells. The method exploits the mucoadhesive and mucopermeable properties of this cationic polysaccharide to deliver siRNA across mucosal epithelium and provides a platform for targeting human diseases with RNAi therapeutics.

Key words

siRNA Chitosan Nanoparticles Macrophages Nasal Delivery Intraperitoneal Delivery TNFα Freeze Drying 


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Copyright information

© Humana Press, a part of Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Morten Østergaard Andersen
    • 1
  • Kenneth Alan Howard
    • 1
  • Jørgen Kjems
    • 1
  1. 1.Interdisciplinary Nanoscience Center (iNANO)Department of Molecular BiologyUniversity of AarhusDenmark

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