Multicenter Randomized Phase II Study to Evaluate the Efficacy of Prophylactic Transfer of CD4 Lymphocytes After T-cell Depleted Reduced Intensity HLA-Identical Sibling Transplantation for Haematological Cancers
Multicenter Randomized Phase II Study to Evaluate the Efficacy of Prophylactic Transfer of CD4 Lymphocytes After T-cell Depleted Reduced Intensity HLA-Identical Sibling Transplantation for Haematological Cancers
RATIONALE: Giving low doses of chemotherapy, such as fludarabine and melphalan, before a donor stem cell transplant helps stop the growth of cancer cells. It also stops the patient's immune system from rejecting the donor's stem cells. The donated stem cells may replace the patient's immune cells and help destroy any remaining cancer cells (graft-versus-tumor effect). Giving an infusion of the donor's T cells (donor lymphocyte infusion) that have been treated in the laboratory after the transplant may help increase this effect. Sometimes the transplanted cells from a donor can also make an immune response against the body's normal cells. Giving alemtuzumab before transplant and cyclosporine after transplant, may stop this from happening.
PURPOSE: This randomized phase II trial is studying donor lymphocyte infusion after stem cell transplant in preventing cancer relapse or cancer progression in patients with follicular lymphoma, small lymphocytic non-Hodgkin lymphoma, or chronic lymphocytic leukemia.
OBJECTIVES:
Primary
Secondary
OUTLINE: This is a multicenter study.
Patients receive fludarabine IV, melphalan IV, and alemtuzumab IV as reduced intensity conditioning for T-cell depletion followed by a reduced-intensity HLA-identical sibling stem cell transplantation on day 0. Withdrawal of cyclosporine immunosuppression therapy commence at day 40 with tapering over a period of 3-4 weeks, according to the discretion of the PI. Patients are reassessed between day 70-90 post-transplantation. Patients with stable engraftment, no significant graft-versus-host disease, and no early relapse or progression are randomized to 1 of 2 treatment arms.
Patients undergo blood sample collection for chimerism studies and translational research.
After completion of study treatment, patients are followed up periodically for 1 years and then annually.
Peer Reviewed and Funded or Endorsed by Bloodwise.
At registration (pre-transplant)
Haematological cancer which can be ONE OF the following:
Have undergone disease reassessment within 8 weeks prior to registration
HLA-identical sibling transplant to be performed using one of the following reduced intensity alemtuzumab-containing conditioning regimens:
Aged ≥18 years, and <70 years
Written informed consent
Exclusion Criteria
Post-transplant