Donor Stem Cell Transplant in Treating Patients With High-Risk Chronic Lymphocytic Leukemia or Small Lymphocytic Lymphoma
Condition: Leukemia; Lymphoma
MeSH terms: Lymphoma; Leukemia; Leukemia, Lymphoid; Leukemia, Lymphocytic, Chronic, B-Cell
Study type: Interventional
Phase: Phase 2

Summary: 
      RATIONALE: Giving low doses of chemotherapy before a donor stem cell transplant helps stop
      the growth of cancer cells. It may also stop the patient's immune system from rejecting the
      donor's stem cells. Also, monoclonal antibodies, such as rituximab, can find cancer cells and
      either kill them or deliver cancer-killing substances to them without harming normal cells.
      The donated stem cells may replace the patient's immune cells and help destroy any remaining
      cancer cells (graft-versus-tumor effect). Sometimes the transplanted cells from a donor can
      also make an immune response against the body's normal cells. Giving tacrolimus, sirolimus,
      and methotrexate after the transplant may stop this from happening.

      PURPOSE: This phase II trial is studying how well donor stem cell transplant works in
      treating patients with high-risk chronic lymphocytic leukemia or small lymphocytic lymphoma.
    

Detailed description: 
      OBJECTIVES:

      Primary

        -  To determine if this treatment can improve 2-year current progression-free survival
           (PFS) in the early disease cohort compared to historical controls. Specifically, we plan
           to study whether we can achieve 2-year PFS ≥ 70% and to exclude 2 year PFS ≤ 50%

      Secondary

        -  To determine whether in the advanced disease cohort we can achieve 2-year current PFS ≥
           50% and to exclude 2-year PFS ≤ 30%

        -  To assess objective response rate.

        -  To assess the incidence of grade 2-4 and 3-4 acute graft-vs-host disease (GVHD).

        -  To assess the incidence of extensive chronic GVHD.

        -  To assess the incidence of treatment-related mortality at 100 days and 1 year

        -  To assess overall survival

        -  To assess donor chimerism for CD3+ cells at 1 and 2 years after transplantation

        -  To investigate the presence of donor antigen-specific T-cell clones before and after
           withdrawal of immune suppression.

        -  To compare the relapse profiles of patients with T-cell responses against CLL to those
           whose CLL cells are not reactive

        -  To prospectively examine the impact of high-risk genomic features and immune-based
           single nucleotide polymorphisms on response, toxicity, and 2-year PFS to reduced
           intensity allogeneic stem cell transplant

      OUTLINE: This is a multicenter study.

        -  Preparative regimen: Patients receive 1 of 2 preparative regimens at the discretion of
           the participating institution.

             -  Preparative regimen 1: Patients receive rituximab IV on days -7, -1, 7, and 14 and
                fludarabine phosphate IV over 30 minutes and busulfan IV over 3 hours on days -5 to
                -2. .

             -  Preparative regimen 2: Patients receive rituximab IV on days -7, -1, 7, and 14,
                fludarabine phosphate IV over 30 minutes on days -5 to -2, and cyclophosphamide IV
                over 1-2 hours on days -5 to -3. Patients with matched unrelated donors also
                receive anti-thymocyte globulin IV over 4-6 hours on days -6 to -4.

        -  Graft-vs-host disease (GVHD) prophylaxis: Patients who receive preparative regimen 1 may
           receive either GVHD prophylaxis regimen 1 or 2; patients who receive preparative regimen
           2 may only receive GVHD prophylaxis regimen 2.

             -  GVHD prophylaxis regimen 1: Patients receive tacrolimus either orally or IV and
                oral sirolimus beginning on day -2 and continuing until day 60, followed by a taper
                until day 180. Patients also receive methotrexate IV on days 1, 3, and 6.

             -  GVHD prophylaxis regimen 2: Patients receive tacrolimus either orally or IV
                beginning on day -2 and continuing until day 60, followed by a taper until day 180.
                Patients also receive methotrexate IV on days 1, 3, 6, and 11.

        -  Transplantation: Patients undergo allogeneic peripheral blood stem cell transplantation
           on day 0.

        -  Maintenance therapy: Patients receive rituximab IV at 3, 6, 9, and 12 months after
           transplantation.

      Peripheral blood and bone marrow aspirate samples may be collected periodically for
      correlative laboratory studies.

      Patients are followed up periodically for a maximum of 5 years from study entry.
    

Intervention name(s): rituximab; busulfan; cyclophosphamide; fludarabine phosphate; methotrexate; sirolimus; tacrolimus; allogeneic stem cell transplant
Intervention type(s): Biological; Drug; Drug; Drug; Drug; Drug; Drug; Procedure
Intervention MeSH terms: Sirolimus; Cyclophosphamide; Busulfan; Rituximab; Methotrexate; Fludarabine; Fludarabine phosphate; Tacrolimus
Intervention model: Single Group Assignment
Masking: None (Open Label)
Primary purpose: Treatment
Keywords: refractory chronic lymphocytic leukemia; stage I chronic lymphocytic leukemia; stage II chronic lymphocytic leukemia; stage III chronic lymphocytic leukemia; stage IV chronic lymphocytic leukemia; B-cell chronic lymphocytic leukemia; contiguous stage II small lymphocytic lymphoma; noncontiguous stage II small lymphocytic lymphoma; recurrent small lymphocytic lymphoma; stage I small lymphocytic lymphoma; stage III small lymphocytic lymphoma; stage IV small lymphocytic lymphoma