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Related Experiment Videos

Improvements in gene therapy technologies.

Y Kaneda1

  • 1Division of Gene Therapy Science, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan. kaneday@gts.med.osaka-u.ac.jp

Molecular Urology
|November 3, 2001
PubMed
Summary
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Hemagglutinating virus of Japan (HVJ) fused with liposomes offers efficient gene delivery in vitro and in vivo. This virosome technology shows promise for various gene therapy applications, including cancer and organ-specific treatments.

Area of Science:

  • Biotechnology
  • Gene Therapy
  • Virology

Background:

  • Liposomes are effective drug delivery vehicles.
  • Hemagglutinating virus of Japan (HVJ) mediates efficient cell fusion.
  • Gene delivery requires efficient and safe methods for therapeutic applications.

Purpose of the Study:

  • To develop an efficient gene delivery system using HVJ-liposomes (virosomes).
  • To enhance gene delivery and expression in vitro and in vivo.
  • To explore the therapeutic potential of virosomes in various disease models.

Main Methods:

  • Combining HVJ with liposomes to create fusigenic virosomes.
  • Utilizing Epstein-Barr virus (EBV) replicon for sustained transgene expression.
  • Modifying virosomes with cationic lipids or artificial viral envelopes (AVE) to enhance transfection efficiency.

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  • Evaluating gene delivery and therapeutic efficacy in animal models.

    • Main Results:

    • HVJ-liposomes efficiently delivered genes (<100 kbp) and oligonucleotides without cell damage.
    • EBV-based virosomes achieved sustained transgene expression.
    • HVJ-cationic liposomes enhanced in vitro gene delivery 100-800 fold.
    • AVE-type virosomes increased in vivo transfection efficiency ~10 fold, particularly in major organs.
    • Successful gene therapy demonstrated for hepatomas and arteriosclerosis obliterans in animal models.

    Conclusions:

    • Fusigenic virosomes are highly efficient and versatile for gene delivery and therapy.
    • Modified virosomes (cationic, AVE) significantly improve transfection efficiency.
    • HVJ-liposome technology holds great promise for diverse gene therapy strategies across multiple organs and diseases.