The purpose of this study is to determine whether thymic shielding during total body irradiation can be given and whether it will reduce the risk of infections in Fanconi Anemia patients undergoing alternate donor (not a matched sibling) stem cell transplants.
All subjects will be given the same treatment regimen of total body irradiation (TBI), Fludarabine, Cyclophosphamide, and anti-thymocyte globulin (ATG), followed by an alternate donor stem cell transplant. Since this treatment regimen has been given before, without thymic shielding, we will compare the outcomes of these patients with the historical data from subjects who did not receive thymic shielding.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
16
Bone marrow failure may be treated by giving patients stem cells that come from someone else. This is called a stem-cell transplant. As part of the transplant process, patients receive high doses of chemotherapy and/or radiation to treat their underlying disease. As one of its effects, this treatment also kills the healthy stem cells that are already in the marrow. The transplant provides new stem cells for the patient from a healthy donor; that replace the bone marrow and allow the blood counts to recover.
protecting the thymus during total body radiation (450 cGy administered)
Masonic Cancer Center, University of Minnesota
Minneapolis, Minnesota, United States
Number of Patients Who Exhibited Hematopoietic Recovery and Engraftment
Calculated from Day 1 of hematopoietic cell transplant to Day 42 post-transplant. Hematopoietic recovery and engraftment is defined as the first of three consecutive days the patient's absolute neutrophil count is greater than or equal to 0.5X10\^9/Liter.
Time frame: Day 42 after hematopoietic cell transplant
Number of Patients Who Exhibited Secondary Graft Failure
Calculated from Day 1 of hematopoietic cell transplant to Day 100 after transplant. A complication after Bone Marrow Transplant in which the transplanted stem cells do not grow in the recipient's bone marrow and thus do not produce new blood cells.
Time frame: Day 100 after hematopoietic cell transplant
Number of Patients With Acute Graft Versus-Host Disease (aGVHD)
Calculated from Day 1 of hematopoietic cell transplant to Day 100 after transplant. GVHD is a common complication of allogeneic bone marrow transplantation in which functional immune cells in the transplanted marrow recognize the recipient as "foreign" and mount an immunologic attack.
Time frame: Day 100 after hematopoietic cell transplant
Number of Patients With Chronic Graft Versus-Host Disease (GVHD)
Calculated from Day 1 of hematopoietic cell transplant to 1 year after transplant. GVHD is a common complication of allogeneic bone marrow transplantation in which functional immune cells in the transplanted marrow recognize the recipient as "foreign" and mount an immunologic attack.
Time frame: 1 year after hematopoietic cell transplant
Number of Patients Who Exhibited Regimen-related Toxicity (RRT)
Calculated from Day 1 of hematopoietic cell transplant to 1 year after transplant. Regimen-related toxicity involves harmful effects in an organism through exposure to the treatment given.
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Six days before the stem cells are given (day -6), subjects will receive total body irradiation with thymic shielding. Thymic shielding is done by placing a piece of lead on the chest during the irradiation treatment so that the irradiation beams do not go to the thymus.
Day -5 through Day -2, subjects will receive a chemotherapy regimen of Fludarabine, Cyclophosphamide via central line
Time frame: 1 year after hematopoietic cell transplant
Immune Reconstitution - Mean Value (1 Year)
Calculated mean value of patient CD4 values collected at intervals from Day 30 through 1 year post-transplant.
Time frame: 1 year post-transplant.
Immune Reconstitution - Mean Value (2 Years)
Calculated mean value of patient CD4 values collected at intervals from Day 30 through 2 years post-transplant.
Time frame: at 2 years after transplant
Number of Patients Alive at 1 Year
Calculated from Day 1 of hematopoietic cell transplant to 1 year post-transplant.
Time frame: 1 year after transplant
Number of Patients Alive at 2 Years
Calculated from Day 1 of hematopoietic cell transplant to 2 years post-transplant.
Time frame: 2 years after transplant