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Title
  • en The Polyethyleneglycol Dilemma: Advantage and Disadvantage of PEGylation of Liposomes for Systemic Genes and Nucleic Acids Delivery to Tumors
Creator
Accessrights open access
Subject
  • Other en liposome
  • Other en small interfering RNA
  • Other en tumor
  • Other en multifunctional envelope-type nano device
  • Other en drug delivery system
  • NDC 499
Description
  • Abstract en Gene and nucleic acid therapy is expected to play a major role in the next generation of agents for cancer treatment. We have recently developed a multifunctional envelope-type nano device (MEND) for use as a novel nonviral gene delivery system. The modification of polyethyleneglycol (PEG), i.e., PEGylation, is a useful method for achieving a longer circulation time for the delivery of MEND to a tumor via the enhanced permeability and retention (EPR) effect. However, PEGylation strongly inhibits cellular uptake and endosomal escape, which results in significant loss of activity of the delivery system. For successful nucleic acid delivery for cancer treatment, the crucial problem associated with the use of PEG, i.e., the "PEG dilemma" must be resolved. In this review, we describe the development and applications of MEND and discuss various strategies for overcoming the PEG dilemma based on the manipulation of both pharmacokinetics and intracellular trafficking of cellular uptake and endosomal release. To increase cellular uptake, target ligands including proteins, peptides, antibodies and aptamers that recognize molecules specifically expressed on tumors are first introduced. Second, cleavable PEG systems are described. The cleavage of PEG from carriers was achieved in response to the intracellular environment as well as the tumor microenvironment, which improvs cellular uptake and endosomal escape. Then, endosomal fusogenic peptides are discussed. Finally, pH-sensitive liposomes using pH-sensitive lipids are described.
Publisher en Pharmaceutical Soc Japan
Date
    Issued2013-06
Language
  • eng
Resource Type journal article
Version Type VoR
Identifier HDL http://hdl.handle.net/2115/53045
Relation
  • isIdenticalTo DOI https://doi.org/10.1248/bpb.b13-00059
  • PMID 23727912
Journal
    • PISSN 0918-6158
      • en Biological & Pharmaceutical Bulletin
      • Volume Number36 Issue Number6 Page Start892 Page End899
File
Oaidate 2023-07-26