Abstract
Graft-versus-host disease (GVHD) remains a major cause of morbidity and mortality in allogeneic hematopoietic stem cell transplantation. Migration of donor-derived T cells into GVHD target organs plays an essential role in the development of GVHD. β2 integrins are critically important for leukocyte extravasation through vascular endothelia and for T cell activation. We asked whether CD18-deficient T cells would induce less GVHD while sparing graft-versus-leukemia (GVL) effect. In murine allogeneic bone marrow transplantation models, we found that recipients of CD18-/- donor T cells had significantly less GVHD morbidity and mortality compared with recipients of WT donor T cells.
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