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c-Rel in GVHD biology: a missing link

Shoba Amarnath1

  • 1Experimental Transplantation and Immunology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA.

European Journal of Immunology
|September 17, 2013
PubMed

Graft-versus-host disease (GVHD) is a major complication associated with allogeneic bone marrow transplantation (BMT). Recent advances in the treatment of lymphoid malignancies with BMT include exploring mechanisms that can inhibit GVHD while maintaining graft-versus-leukemic (GVL) effects. In this issue of the European Journal of Immunology, Yu et al. [Eur. J. Immunol. 2013.43: 2327-2337] demonstrate efficient separation of GVHD and GVL by abrogating c-Rel in T cells. Intrinsic c-Rel deficiency in T cells resulted in complete protection against GVHD in both major and minor histocompatibility mismatched murine models of BMT. Protection against GVHD was associated with a decreased presence of Th1 and Th17 cells with a concomitant increase in Treg-cell numbers. Interestingly, an intrinsic defect of c-Rel also resulted in decreased expression of the Th1-associated chemokine receptor CXCR3. Finally, the absence of c-Rel maintained GVL effects with significant tumor clearance in murine recipients. These data suggest that specific targeting of the T-cell-specific transcription factor c-Rel can inhibit GVHD while maintaining GVL effects.

Keywords:
GVHDGVLTransplantationc-Rel

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