Autologous Transplant Using Dose-Escalated Total Body Irradiation & Cyclophosphamide & Palifermin for NHL

Most participants with a relapsed or refractory non-Hodgkin's lymphoma that receive an autologous transplant are likely to suffer a relapse because standard myeloablative preparative regimens are unable to produce a cure. The majority of these participants do not have a stem cell donor available, are too frail to undergo an allogeneic transplant, or refuse an allograft. Historically these participants with high risk non-Hodgkin's lymphoma have had a very poor outcome. To take advantage of the low transplant related mortality associated with an autologous transplantation, the investigators propose modifying the preparative regimen to make it more effective without increasing toxicity. By increasing the dose of radiation while administering the protective growth factor palifermin (Kepivance), the investigators hope to decrease the risk of relapse without increasing transplant related mortality. Three prospective randomized trials have studied different radiation schemes as a part of the TBI and cytoxan preparative regimen prior to allogeneic transplantation for patients with AML or CML. As a group these trials showed that higher doses of TBI in these older studies decreased the risk of relapse at the expense of VOD, GVHD, and CMV. Three retrospective studies have also postulated that higher dose radiation led to less risk of relapse.

This is a non-randomized, open-label phase I trial in participants with non-Hodgkin's lymphoma. The preparative regimen will be as follows: Day -10 (prior to transplant) Palifermin treatment to prevent mouth sores Day -9 Palifermin treatment to prevent mouth sores Day -8 Palifermin treatment to prevent mouth sores Day -7 Total Body Irradiation twice a day Day -6 Total Body Irradiation twice a day Day -5 Total Body Irradiation twice a day Day -4 Total Body Irradiation twice a day Day -3 Cytoxan chemotherapy infusion Day -2 Cytoxan chemotherapy infusion Day -1 Day of rest Day 0 Stem cell infusion (bone marrow transplant), Palifermin treatment to prevent mouth sores and G-CSF given daily until stem cells take hold (engraftment) occurs. Day +1 Palifermin treatment to prevent mouth sores Day +2 Palifermin treatment to prevent mouth sores