These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Generation of donor-specific regulatory T-cell function in kidney transplant patients.
    Author: Hendrikx TK, van Gurp EA, Sewgobind VD, Mol WM, Schoordijk W, Klepper M, Velthuis JH, Geel A, Ijzermans JN, Weimar W, Baan CC.
    Journal: Transplantation; 2009 Feb 15; 87(3):376-83. PubMed ID: 19202442.
    Abstract:
    BACKGROUND: In the search for mechanisms that can induce and maintain transplant tolerance, donor-specific CD4CD25FoxP3 regulatory T cells have been frequently mentioned. However, it remains to be demonstrated, whether these cells are generated after clinical transplantation. METHODS: We prospectively analyzed the phenotype and function of peripheral regulatory CD4CD25 T cells of 79 patients before, 3, 6, and 12 months after kidney transplantation. The immune regulatory capacities of CD4CD25 T cells were assessed by their depletion from peripheral blood mononuclear cells and in co-culture with CD25 responder T-cells in the mixed lymphocyte reactions. RESULTS: In the first year after transplantation, the number and proportion of CD4CD25 T cells significantly decreased (P<0.05 and P<0.001, respectively). In the mixed lymphocyte reactions, we observed donor-specific hyporesponsiveness in the presence of significantly increased proliferation to third and fourth Party-Ag, (P<0.001 and P<0.05, respectively). Furthermore, functional analysis of CD25 cells showed that the effect of depletion of these cells from peripheral blood mononuclear cells, and their suppressive capacities in co-culture with donor-Ag stimulated CD25 responder T-cells (1:10 ratio) significantly improved (P<0.01 and P<0.001, respectively). Moreover, the difference between the stimulation with donor-Ag and third Party-Ag became apparent at 6 months after transplantation. CONCLUSIONS: These findings demonstrate that donor-specific CD4CD25 regulatory T-cell function is generated in fully immunosuppressed renal recipients in the first year after transplantation.
    [Abstract] [Full Text] [Related] [New Search]