Differential impact of CD154 costimulation blockade on alloreactive effector and regulatory T cells in murine renal transplant recipients

Lingzhong Meng, Zheng Wu, Yue Wang, Charles Lassman, Ronald W. Busuttil, Yuan Zhai, Jerzy W. Kupiec-Weglinski

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


BACKGROUND. Although CD154 costimulation blockade prolongs allograft survival in multiple transplantation models, the underlying immunological mechanisms remain to be elucidated. METHODS AND RESULTS. We used a murine orthotopic kidney allograft (KTx) model to analyze the impact of CD154 blockade on trafficking and function of alloreactive T effector versus T regulatory cells. A single dose of MR1 Ab treatment at the time of KTx significantly improved the survival of Balb/c KTx in naïve C57BL/6 recipients (mean survival time >100 days vs. 52 days in controls; P<0.005), and improved graft histology, as evidenced by decreased lymphocyte infiltration and preservation of tissue architecture (days 6-8). In the early posttransplant phase, fluorescence-activated cell sorting analysis revealed preferential depression of T effector (CD8CD25) and relative enrichment of T-regulatory (CD4CD25CD152) cells selectively in KTx. This pattern was further supported by intragraft gene expression analysis, which showed increased FoxP3/Tbet ratio and simultaneously decreased granzyme B/IFN-γ levels in Ab-treated recipients. Additionally, MR1 Ab selectively up-regulated intragraft CCL17, but suppressed CXCL9/CCL5, in parallel with increased CCR4/CCR8 but unaltered CXCR3 expression. CONCLUSION. These results provide evidence, at both cellular and molecular levels, that CD154 blockade in murine KTx recipients differentially targeted T-effector and T-regulatory cell subsets by regulating intragraft induction of chemokines targeting distinct T-cell subsets.

Original languageEnglish (US)
Pages (from-to)1332-1338
Number of pages7
Issue number9
StatePublished - May 2008


  • CD154 costimulation
  • Kidney transplantation
  • Treg

ASJC Scopus subject areas

  • Transplantation


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