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Related Experiment Videos

Feasibility of double-expression retroviral vector using complement regulatory factor gene

S Hayashi1, N Emi, H Okada

  • 1Department of Surgery II, Nagoya University School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466, Japan.

The Journal of Surgical Research
|September 12, 1998
PubMed
Summary

Genetically engineered porcine endothelial cells expressing complement-resistant genes can replace autologous cells in hybrid blood vessels. This research demonstrates the efficacy of using these modified cells, offering a potential alternative for vascular tissue engineering.

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Area of Science:

  • Biomedical Engineering
  • Vascular Biology
  • Gene Therapy

Background:

  • Autologous endothelial cells are typically used for hybrid blood vessels.
  • Genetic engineering offers potential for alternative cell sources.

Purpose of the Study:

  • To evaluate porcine endothelial cells, modified with a double-expression retroviral vector carrying complement-resistant genes, as a substitute for autologous endothelial cells in hybrid blood vessels.

Main Methods:

  • Insertion of decay-accelerating factor (DAF) and tissue plasminogen activator (tPA) cDNA into a retroviral vector with homologous restriction factor 20 cDNA.
  • Transduction of porcine aortic endothelial cells with the engineered vector.
  • Complement-dependent selection and assessment of gene expression.
  • Evaluation of complement-dependent cytotoxicity and U937 cell adherence.

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Main Results:

  • High gene expression of DAF and tPA was achieved in transduced porcine endothelial cells.
  • Transduction significantly inhibited complement-dependent cytotoxicity.
  • Adherence of U937 cells was significantly reduced.

Conclusions:

  • The double-expression retroviral vector effectively conferred complement resistance to porcine endothelial cells.
  • Modified porcine endothelial cells can serve as a viable substitute for autologous cells in hybrid blood vessel applications.