Plerixafor and Filgrastim For Mobilization of Donor Peripheral Blood Stem Cells Before A Donor Peripheral Blood Stem Cell Transplant in Treating Patients With Hematologic Malignancies

PRIMARY OBJECTIVES: I. The percentage of normal donors who collect at least 2 x 10\^6 CD34 cells/kg recipient weight on day 1 after administration of combined filgrastim and plerixafor. SECONDARY OBJECTIVES: I. Measuring CD34+ cells/ul in peripheral blood of donors 11, 15, 24 and 36 hours post dosing. II. Tolerance and safety of combined filgrastim and Plerixafor in normal donors. III. Engraftment of filgrastim/plerixafor mobilized stem cells in allogeneic recipients. IV. Acute and chronic graft-versus-host disease (GVHD) following the use of filgrastim/plerixafor mobilized stem cells. V. Yield of CD34+ cells based on donor weight. OUTLINE: Donors receive filgrastim subcutaneously (SC) and plerixafor SC on day -14 and undergo leukapheresis to collect peripheral blood stem cells (PBSC) on day -13. These cells are frozen to preserve them. Treatment modifications may apply according to sufficient collection of PBSC. Patients receive standard high-dose conditioning and undergo allogeneic PBSC transplantation on day 0 using the previously frozen cells. After completion of study treatment, donors are followed up 1 day after the last stem cell donation.