New developments in the prophylaxis and treatment of graft versus host disease

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Abstract
Graft versus host disease (GVHD) remains the major obstacle to successful allogeneic bone marrow transplantation. Cyclosporin with methotrexate is the most common prophylactic regimen. Tacrolimus is associated with less GVHD and is gaining ground especially in unrelated donor transplants where current regimens are unsatisfactory. Mycophenolate mofetil (MMF) and rapamycin have not yet shown benefit in acute GVHD prophylaxis. In vivo T-cell depletion with Campath 1H or thymoglobulin used during transplant conditioning are increasingly used in place of ex vivo T-cell depletion, where results remain disappointing. Steroids remain first choice for therapy of GVHD but anti-CD25 antibodies, daclizumab or basiliximab are gaining popularity as second-line therapy ahead of ATG. Chronic GVHD is increasing with greater use of peripheral blood stem cell grafts and older patients. The combination of tacrolimus and MMF is promising for patients with extensive disease. Tolerance induction using CTLA-4-Ig, anti-CD40L, tre...