Phase II Maraviroc for GVHD Prevention

RATIONALE: Successful allogeneic stem-cell transplantation is often limited by graft-versus-host disease (GVHD). Migration of donor cells into tissues plays a major role in GVHD. Drugs that block chemokine receptors such as CCR5, can potentially decrease the migration of donor cells into tissues. Blocking CCR5 after allogeneic stem-cell transplantation may therefore reduce the rates of GVHD. PURPOSE: This study explores the efficacy of pharmacologic inhibition of CCR5 in prevention of GVHDby administering maraviroc during allogeneic stem-cell transplantation with reduced intensity conditioning.