Scientific article
Open access

The Role of NK Cells in Pig-to-Human Xenotransplantation

Published inJournal of Immunology Research, vol. 2017, 4627384
Publication date2017

Recruitment of human NK cells to porcine tissues has been demonstrated in pig organs perfused ex vivo with human blood in the early 1990s. Subsequently, the molecular mechanisms leading to adhesion and cytotoxicity in human NK cell-porcine endothelial cell (pEC) interactions have been elucidated in vitro to identify targets for therapeutic interventions. Specific molecular strategies to overcome human anti-pig NK cell responses include (1) blocking of the molecular events leading to recruitment (chemotaxis, adhesion, and transmigration), (2) expression of human MHC class I molecules on pECs that inhibit NK cells, and (3) elimination or blocking of pig ligands for activating human NK receptors. The potential of cell-based strategies including tolerogenic dendritic cells (DC) and regulatory T cells (Treg) and the latest progress using transgenic pigs genetically modified to reduce xenogeneic NK cell responses are discussed. Finally, we present the status of phenotypic and functional characterization of nonhuman primate (NHP) NK cells, essential for studying their role in xenograft rejection using preclinical pig-to-NHP models, and summarize key advances and important perspectives for future research.

  • Animals
  • Animals
  • Genetically Modified
  • Cell Adhesion
  • Cell Line
  • Cytotoxicity
  • Immunologic
  • Dendritic Cells/immunology/transplantation
  • Endothelial Cells/immunology
  • Genetic Therapy
  • Graft Rejection/immunology/prevention & control
  • HLA Antigens/genetics
  • Heterografts/immunology
  • Humans
  • Immunotherapy
  • Adoptive/methods
  • Killer Cells
  • Natural/immunology
  • Primates
  • Swine
  • T-Lymphocytes
  • Regulatory/immunology/transplantation
  • Transplantation
  • Heterologous
Citation (ISO format)
PUGA YUNG, Gisella, SCHNEIDER, Mårten K J, SEEBACH, Jorg Dieter. The Role of NK Cells in Pig-to-Human Xenotransplantation. In: Journal of Immunology Research, 2017, vol. 2017, p. 4627384. doi: 10.1155/2017/4627384
Main files (1)
Article (Published version)
ISSN of the journal2314-8861

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