Absence of donor MHC antigen expression ameliorates chronic kidney allograft rejection

Roslyn B. Mannon, Robert Griffiths, Phillip Ruiz, Jeffrey L. Platt, Thomas M. Coffman

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Background. In previous studies, we have demonstrated that a subset of mouse kidney allografts has prolonged survival without any immunosuppressive treatment. Chronic rejection (CR) develops in these long surviving grafts. The pathologic features of CR in this model are similar to CR in human kidney grafts. Methods. To explore the role of donor major histocompatibility complex (MHC) antigens in the development of CR, we performed vascularized kidney transplants using kidneys from donor mice that lack expression of both MHC class I and II antigens (MHC-/-). Results. Survival was significantly improved in recipients of MHC-/- allografts. This enhanced survival was associated with higher glomerular filtration rate (GFR) in MHC-/- allografts (4.92 ± 0.54 cc/min/kg) compared to controls (2.19 ± 0.63 cc/min/kg; P = 0.004). The typical histologic features of CR were markedly reduced in MHC-/- allografts. Semiquantitative histopathological scores for MHC-/- grafts (13.3 ± 2.1) were significantly lower than in control allografts (19.0 ± 1.0; P = 0.04). Along with this improvement in structural abnormalities, significantly fewer CD4+ T (38.3 cells/mm2 vs. 75.0 cells/mm2; P = 0.008), CD8+ T cells (38.7 vs. 96 cells/mm2, respectively; P = 0.008) and macrophages (60 vs. 134 cells/mm2, respectively; P = 0.04) infiltrated MHC-/- allografts compared to controls. The levels of intragraft cytokine mRNA expression also were reduced in MHC-/- allografts compared to control allografts. Finally, serum alloantibodies were virtually undetectable in recipients of MHC-/- kidney allografts. Conclusions. Cell surface expression of donor MHC antigens promotes the development of CR. Donor antigen expression promotes the accumulation of infiltrating cells in the graft and the development of donor specific alloantibodies. Abrogation of these responses is associated with improved graft survival and reduced CR in MHC-/- grafts.

Original languageEnglish (US)
Pages (from-to)290-300
Number of pages11
JournalKidney international
Volume62
Issue number1
DOIs
StatePublished - 2002

Keywords

  • Antibody
  • Chronic rejection
  • Kidney
  • Late graft failure
  • Major histocompatibility complex antigens
  • MHC
  • Mouse
  • Transplantation

ASJC Scopus subject areas

  • Nephrology

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