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Decline of surface MHC I by adenoviral gene transfer of anti‐MHC I intrabodies in human endothelial cells—new perspectives for the generation of universal donor cells for tissue transplantation
Author(s) -
Beyer Florian,
Doebis Cornelia,
Busch Annette,
Ritter Thomas,
Mhashilkar Abner,
Marasco Wayne M.,
Laube Horst,
Volk HansDieter,
Seifert Martina
Publication year - 2004
Publication title -
the journal of gene medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.689
H-Index - 91
eISSN - 1521-2254
pISSN - 1099-498X
DOI - 10.1002/jgm.548
Subject(s) - major histocompatibility complex , biology , microbiology and biotechnology , mhc class i , immunology , antigen
Background The seeding of small‐calibre vascular polytetrafluoroethylene (PTFE) grafts with endothelial cells provides an increase in biocompatibility of the graft surface. The harvest and ex vivo culture of autologous endothelial cells is highly delicate. Allogeneic human umbilical vein endothelial cells (HUVEC) could be a potential cell source—however, rejection might occur due to major histocompatibility complex (MHC) I mismatches. Lowering cell surface MHC I expression on endothelial cells by gene transfer of an anti‐MHC I intrabody might reduce graft failure. The intrabody consists of a single‐chain variable fragment (sFv) of an anti‐MHC I antibody, carrying a terminal KDEL sequence to retain the molecule together with the MHC I inside the endoplasmic reticulum. Methods Adenoviral gene transfer was used to express the intrabody in HUVEC. The MHC I surface expression was measured 48 h after transduction by flow cytometry. Functional effects of the intrabody expression were analyzed in a calcein release cytotoxicity assay. Results A transduction efficiency of more than 95% with EGFP‐adenovirus indicates a sufficient gene transfer into HUVEC. Intrabody‐adenovirus‐transduced HUVEC show a massive reduction in MHC I surface expression creating almost a complete ‘knockout’ phenotype. Stimulation with inflammatory cytokines could not overcome this effect. The cell lysis of anti‐MHC I intrabody‐expressing HUVEC in a cytotoxicity assay is reduced when compared with the level of the MHC mismatched control. Conclusions Our data indicate that HUVEC with reduced levels of MHC I might be used as universal donor cells for the seeding of vascular grafts. Copyright © 2004 John Wiley & Sons, Ltd.