Immunogenicity of renal microvascular endothelial cells from genetically modified pigs

Zheng Yu Wang, Ping Li, James R. Butler, Ross L. Blankenship, Susan M. Downey, Jessica B. Montgomery, Shunji Nagai, Jose L. Estrada, Matthew F. Tector, A. Joseph Tector

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


Background. Disrupting the porcine GGTA1 and CMAH genes [double knockout (DKO)] that produce the gal-á(1,3)-gal and N-glycolylneuraminic acid xenoantigens reduces human antibody binding to porcine peripheral bloodmononuclear cells. It is important to examine rejection pathways at an organ-specific level. The object of this study is to evaluate the human preformed antibody reactivity against DKOrenalmicrovascular endothelial cells (RMEC) in vitro.Methods. Characteristics of DKO RMEC were analyzed using flow cytometry. Human IgG/M binding to primary RMEC, immortalized RMEC (iRMEC), and iRMEC-deficient in B4GALNT2 genes were examined using flow cytometric crossmatch assay. Results. Porcine RMEC expressed gal-á(1,3)-gal, N-glycolylneuraminic acid, and Dolichos biflorus agglutinin glycans recognized by human preexisting antibodies in humans. Antigenicity of DKO RMEC was lower than GGTA1 KO RMEC. The disruption of B4GALNT2 gene in DKO iRMEC further reduced human IgG/IgM binding. Conclusions. Silencing the porcine GGTA1, CMAH, and B4GALNT2 genes is an effective strategy to reduce human preformed antibody binding to RMEC. Porcine RMEC will be a useful reagent for the further study of xenoimmunology.

Original languageEnglish (US)
Pages (from-to)533-537
Number of pages5
Issue number3
StatePublished - 2016
Externally publishedYes

ASJC Scopus subject areas

  • Transplantation


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