Study Status: Active, not recruiting
Recruit Status: Active, not recruiting
Study Type: Interventional
Official Title: CASPALLO: A Phase I Study Evaluating the Use of Allodepleted T Cells Transduced With Inducible Caspase 9 Suicide Gene After Haploidentical Stem Cell Transplantation
Brief Summary:
Patients are being asked to participate in this study because they will be receiving a stem cell transplant as treatment for their disease. As part of the stem cell transplant, they will be given very strong doses of chemotherapy, which will kill off all their existing stem cells. Stem cells are created in the bone marrow. They grow into different types of blood cells that we need, including red blood cells, white blood cells, and platelets.
We have identified a close relative of the patients whose stem cells are not a perfect match for the patient, but can be used. This type of transplant is called "allogeneic", meaning that the cells come from a donor. With this type of donor who is not a perfect match, there is typically an increased risk of developing graft-versus-host disease (GvHD) and a longer delay in the recovery of the immune system. Seventy to ninety percent (70-90%) of people who receive unchanged marrow or stem cells from this type of donor will develop severe GvHD.
GvHD is a serious and sometimes fatal side effect of stem cell transplant. GvHD occurs when the new donor cells recognize that the body tissues of the patient are different from those of the donor. When this happens, cells in the graft may attack the host organs, primarily the skin, liver and intestines, causing severe rashes, diarrhea, liver disease, and even death. GvHD is caused by a type of immune cell in the graft called T cells. Because there is a high risk of GvHD with the type of transplant the patient will receive, we will selectively remove the T cells from the graft that the patient will receive. This process, which is called "CD34 selection", is discussed in more detail in the separate consent form for the transplant.
While this stem cell selection procedure will redu