We have performed a non-randomised GVHD prophylaxis trial comparing cyclosporin/methotrexate with in vivo/ex vivo T cell depletion with the monoclonal antibodies Campath 1G/1M in patients with acute leukaemias in first complete remission. We observed significantly less acute and chronic GVHD, neutropenic fever and severe mucositis in the T cell depletion group. The incidence of graft rejection and relapses was no higher than in the cyclosporin/methotrexate group. There is a trend in favour of improved disease-free survival in the in vivo/ex vivo T cell depletion group (80% vs. 62%).
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