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Regulatory T cells control autoimmunity following syngeneic bone marrow transplantation.

Abstract : Sublethally irradiated, immunodeficient, C57BL/6 RAG-2 gene-deleted recipient mice reconstituted with T cell-depleted bone marrow (BM) grafts frequently developed diarrhea, lost weight and showed signs of autoimmunity, dying between 4 and 7 weeks after reconstitution. Mice died despite evidence of efficient donor-derived hemato-lymphoid reconstitution, and disease was associated with the presence of IgG anti-nuclear antibodies. Autoimmunity was initiated by T cells, but could be prevented by transfer of naturally arising regulatory T cells. In contrast, lethally irradiated, BM-reconstituted immunocompetent, C57BL/6 mice survived without signs of autoimmunity. Survival of immunocompetent mice was shown to be due to the presence of residual, extra-thymically located, radio-resistant, functional regulatory T cells. The importance of regulatory T cells was further shown by the reduced survival of immunocompetent BM recipients whose CD25+ T cells had been depleted prior to bone marrow transplantation. The implications of these results in the context of syngeneic graft-versus-host disease following BM transplantation are discussed.
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Contributor : Philippe Saas Connect in order to contact the contributor
Submitted on : Thursday, April 15, 2010 - 2:21:35 PM
Last modification on : Friday, January 14, 2022 - 3:08:17 AM




Angèle Bénard, Rhodri Ceredig, Antonius G. Rolink. Regulatory T cells control autoimmunity following syngeneic bone marrow transplantation.. European Journal of Immunology, Wiley-VCH Verlag, 2006, 36 (9), pp.2324-35. ⟨10.1002/eji.200636434⟩. ⟨inserm-00473511⟩



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