Journal
ADVANCED DRUG DELIVERY REVIEWS
Volume 61, Issue 9, Pages 710-720Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.addr.2009.04.001
Keywords
Polycations; Nanoparticles; Polyplexes; RNA interference; siRNA; In vivo; Intravenous; Bioresponsive; Extracellular; Intracellular
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RNAi-based therapies are dependent on extracellular and intracellular delivery of RNA molecules for enabling target interaction. Polycation-based nanoparticles (or polyplexes) formed by self-assembly with RNA can be used to modulate pharmacokinetics and intracellular trafficking to improve the therapeutic efficacy of RNAi-based therapeutics. This review describes the application of polyplexes for extracellular and intracellular delivery of synthetic RNA molecules. Focus is given to routes of administration and silencing effects in animal disease models. The inclusion of functional components into the nanoparticle for controlling cellular trafficking and RNA release is discussed. This work highlights the versatile nature of polycation-based nanoparticles to fulfil the delivery requirements for RNA molecules with flexibility in design to evolve alongside an expanding repertoire of RNAi-based drugs. (C) 2009 Published by Elsevier B.V.
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