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2005 Fiscal Year Final Research Report Summary

Development of topical gene delivery system for clinical application

Research Project

Project/Area Number 15590133
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Medical pharmacy
Research InstitutionNagasaki University Hospital of Medicine and Dentistry

Principal Investigator

SASAKI Hitoshi  Nagasaki University, Hospital of Medicine and Dentistry, Professor, 医学部・歯学部附属病院, 教授 (00170689)

Co-Investigator(Kenkyū-buntansha) NAKAMURA Junzo  Nagasaki University, Graduate School of Biomedical Sciences, Professor, 大学院・医歯薬学総合研究科, 教授 (30115901)
NAKASHIMA Mikiro  Nagasaki University, Graduate School of Biomedical Sciences, Professor, 大学院・医歯薬学総合研究科, 教授 (00260737)
NISHIDA Koyo  Nagasaki University, Graduate School of Biomedical Sciences, Associate Professor, 大学院・医歯薬学総合研究科, 助教授 (20237704)
Project Period (FY) 2003 – 2005
KeywordsTopical application / Gene delivery / Drug delivery system / Liposomes / Polymer / Ophthalmology / Pharmacokinetics / Clinical application
Research Abstract

Gene therapy is a useful treatment for curing inborn and acquired diseases. The eye has a number of advantages as a target organ for gene delivery. The use of non-viral vectors attracts great interests for in vivo gene delivery because they lack some of the risks inherent in viral vector systems
We have investigated the transfection activity of plasmid DNA (pDNA)/cationic liposome complexes to the eye in rabbits. Among the transfection experiments with various lipids, pDNA complexed with DOTMA/Chol liposomes showed the highest transfection activity after intravitreal injection. The complexes at a charge raio of +2.0 produced maximal gene expression in the eye. In conlusion, optimizing the lipid composition of cationic liposomes and the charge ratio of pDNA/cationic liposome complexes should enhance the transfection efficiency to the eye.
We have examined the effect of blood components on gene delivery with polyethyleneimine (PEI) in a human endothelial cell line. The transfection activity with pDNA/PEI complex was markedly decreased in the presence of fetal bovine serum, bovine serum albumin, human blood, human plasma, cholesterol and fatty acids, although it was not affected by lecithin and bile salts. Ternary complexes using polyanion could decrease the influence of blood components on gene expression. On the other hand, the transfection activity with pDNA/PEI complex was increased 2-3 times by the presence of glucose. We also found that the gene expression of pDNA/PEI complex and pDNA/liposomes complex was influenced by the disease such as hepatitis.
We have developed the ocular pharmacokinetic/pharmacodynamic (PK/PD) model of model drug, bunazosin, on the basis of the concentration-time profiles and hypotensive profiles of bunazosin. The PK/PD models can predict the concentrations of bunazosin in the ocular tissues and its hypotensive effect after instillation and ocular injection. This PK/PD model must be useful for designing the gene delivery system.

  • Research Products

    (12 results)

All 2005 2004 2003

All Journal Article (12 results)

  • [Journal Article] Unilateral kindney-selective gene transfer following the administration of naked plasmid DNA to the kidney surface in mice2005

    • Author(s)
      Ryu Hirayama, Hitoshi Sasaki, Junzo Nakamura et al.
    • Journal Title

      Biological & Pharmaceutical Bulletin 28・1

      Pages: 181-184

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Effect of solution composition of plasmid DNA on gene transfection following liver surface administration in mice2005

    • Author(s)
      Ryu Hirayama, Hitoshi Sasaki, Junzo Nakamura et al.
    • Journal Title

      Biological & Pharmaceutical Bulletin 28・11

      Pages: 2166-2169

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Unilateral kidney-selective gene transfer following the administration of naked plasmid DNA to the kidney surface in mice2005

    • Author(s)
      Ryu Hirayama, Hitoshi Sasaki, Junzo Nakamura et al.
    • Journal Title

      Biological & Pharmaceutical Bulletin, 28-1

      Pages: 181-184

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Effect of solution composition of plasmid DNA on gene transfection following liver surface administration in mice2005

    • Author(s)
      Ryu Hirayama, Hitoshi Sasaki, Junzo Nakamura et al.
    • Journal Title

      Biological & Pharmaceutical Bulletin, 28-11

      Pages: 2166-2169

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Ocular pharmacokinetic/pharmacodynamic (PK/PD) modeling for bunazosin after instillation into rabbits2004

    • Author(s)
      Koji Sakanaka, Junzo Nakamura, Hitoshi Sasaki et al.
    • Journal Title

      Pharmaceutical Research 21・5

      Pages: 771-776

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Prednisolone retention in integrated liposomes by chemical approach and pharmaceutical approach2004

    • Author(s)
      Mugen Teshima, Koyo Nishida, Hitoshi Sasaki et al.
    • Journal Title

      Journal of Controlled Release 97・2

      Pages: 211-218

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] In vivo gene transfection via intravitreal injection of cationic liposome/plasmid DNA complexes in rabbits2004

    • Author(s)
      Shigeru Kawakami, Junzo Nakamura, Hitoshi Sasaki et al.
    • Journal Title

      International Journal of Pharmaceutics 278・2

      Pages: 255-262

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Ocular pharmacokinetic/pharmacodynamic modeling for bunazosin after instillation into rabbits2004

    • Author(s)
      Koji Sakanaka, Junzo Nakamura, Hitoshi Sasaki et al.
    • Journal Title

      Pharmaceutical Research, 21-5

      Pages: 770-776

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Prednisolone retention in integrated liposomes by chemical approach and pharmaceutical approach2004

    • Author(s)
      Mugen Teshima, Koyo Nishida, Hitoshi Sasaki et al.
    • Journal Title

      Journal of Controlled Release, 97-2

      Pages: 211-218

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] In vivo gene transfection via intravitreal injection of cationic liposome/plasmid DNA complexes in rabbits2004

    • Author(s)
      Shigeru Kawakami, Junzo Nakamura, Hitoshi Sasaki et al.
    • Journal Title

      International Journal of Pharmaceutics, 278-2

      Pages: 255-262

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] One-side-coated insert as a unique ophthalmic drug delivery system2003

    • Author(s)
      Hitoshi Sasaki, Koyo Nishida, Mikiro Nakashima et al.
    • Journal Title

      Journal of Controlled Release 92・3

      Pages: 241-247

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] One-side-coated insert as a unique ophthalmic drug delivery system2003

    • Author(s)
      Hitoshi Sasaki, Koyo Nishida, Mikiro Nakashima et al.
    • Journal Title

      Journal of Controlled Release, 92-3

      Pages: 241-247

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2007-12-13  

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