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Characterization of Blood Outgrowth Endothelial Cells (BOEC) from Porcine Peripheral Blood
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Genetic manipulation in pigs.

David H Sachs1, Cesare Galli

  • 1Massachusetts General Hospital, Transplantation Biology Research Center, Boston, Massachusetts 02129, USA. david.sachs@tbrc.mgh.harvard.edu

Current Opinion in Organ Transplantation
|May 27, 2009
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Summary
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Genetic engineering advances, particularly in swine, are overcoming barriers in xenotransplantation. Genetically modified animals show improved organ transplant survival rates in primates, paving the way for future success.

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Area of Science:

  • Biotechnology
  • Immunology
  • Transplantation

Background:

  • Genetic engineering enables gene modification across species, crucial for overcoming xenotransplantation challenges.
  • Species-specific disparities significantly impact organ transplant success rates.
  • Genetically modified animals are central to advancing xenotransplantation techniques and applications.

Purpose of the Study:

  • To review advancements in genetic engineering techniques for animals.
  • To explore the applications of genetically modified animals in xenotransplantation.
  • To highlight the potential of these modifications in overcoming transplant barriers.

Main Methods:

  • Utilizing existing genetic modification techniques in swine.
  • Developing novel technologies like enzymatic engineering and small interfering RNA.
  • Employing alpha-1,3-galactosyltransferase gene-knockout models.

Main Results:

  • Genetically modified swine demonstrate potential to overcome physiological and immunological barriers in xenotransplantation.
  • Alpha-1,3-galactosyltransferase gene-knockout donors show significantly improved xenograft survival.
  • Genetic modifications aim to mitigate cellular and antibody responses to species-specific antigens.

Conclusions:

  • Genetic engineering techniques in swine effectively reduce immune rejection in xenografts.
  • Organs from genetically engineered animals exhibit enhanced survival in nonhuman primates.
  • Induction of tolerance, by avoiding new antigen immunization, is key to successful xenotransplantation.