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Find 1,903 clinical trials for leukemia near Maryland. Connect with research centers in your area.
Showing 1441-1460 of 1,903 trials
NCT02226861
Background: \- Stem cell transplantation from a partially matched donor can lead to graft-versus-host disease (GVHD). Researchers want to learn how to improve these transplantations. Objective: \- To see if very low doses of Interleukin-2 after a partially matched transplantation prevent GVHD. Eligibility: * Recipients: age 18 65, with certain bone marrow or lymphatic system diseases and an available family member with partial tissue match. * Donors: age 18 80. Design: * Recipients will be screened with medical history, physical exam, and many tests including blood and tissue tying. * Donors will be screened with medical history, physical exam, blood tests and tissue typing. * Recipients will stay in the hospital 3 6 weeks. * All participants will have apheresis. Blood is drawn from one arm, run through a machine that collects white blood cells, then returned into the other arm. * Recipients will have: * Intravenous (IV) line placed under the skin and into a neck vein, to stay throughout transplant and recovery. They may also have a catheter inserted for collecting immune cells. * Bone marrow sample taken by needle. They will have 3 more after transplant. * Donors will have: * Filgrastim injected once daily for 5 6 days. * Stem and immune cells collected by another apheresis. * Recipients will get: * Eight 30-minute doses of radiation, sitting at a machine. * Donor immune cells by IV, 6 days before the transplant day. * Chemotherapy drugs by IV. \<TAB\>\<TAB\>- Donor stem cells by IV on transplant day. * After transplant, recipients will give self-injections of very low doses of Interleukin-2 once daily for about 12 weeks. * Before and after transplant, recipients will get medicine to suppress the immune system and antibiotics to prevent infections * Recipients must stay near NIH for 3 6 months after transplant. * All recipients and donors will have 3 years of follow-up.
NCT01445132
Background: * After allogeneic (donor) stem cell transplantation, a new immune system grows in the patient from the transplanted donor stem cells and lymphocytes (type of immune cell). Donor lymphocytes, unlike the patient s own lymphocytes, often can recognize the patient s tumor cells as being foreign and destroy them. * It is thought that tumor shrinkage after stem cell transplantation is the result of donor T lymphocytes, or T cells. Some studies show that patients with tumors that have T cells are better able to keep tumor growth in check. * Patients who have had donor stem cell transplantation may have donor T cells in their tumors that can recognize and fight their cancer. Compared with donor T cells taken directly from the donor and infused into the patient, donor T cells found in patients tumors may be specific for the cancer cells and thus better able to attack tumor. Also, because the T cells found their way to the tumor, they may be less likely to recognize and attack non-tumor tissues than the T cells given in donor lymphocyte infusions. * The T cells may be especially effective at controlling tumor if they are given an additional stimulus to become active. Costimulation is the name of the body s natural process for providing an extra stimulus, and can be performed on cells in the laboratory. Costimulation can produce large numbers of activated cells that may be able to attack cancer cells and shrink tumors. Objectives: -To evaluate the ability of lymphocytes found in tumors from patients who have received donor stem cell transplants to control their tumor growth. Eligibility: -Patients between 18 and 75 years of age with a B-cell cancer that has continued to grow or recurred after remission following allogeneic stem cell transplantation. This includes patients who have received transplants from unrelated donors and cord blood. Design: * Immune cells are collected from patients blood and blood from their stem cell donor. * Patients undergo surgery to remove their tumor and a small piece of skin. In the laboratory, donor T cells are isolated from the tumor and costimulated to expand the number of cells and activate them. * The expanded, activated T cells as infused into the patient. * Patients have a needle biopsy and possibly surgery to remove a sample of remaining tumor for research studies. * Patients are followed at the NIH clinic 48 hours after the cell infusion, and again at 1, 2, 4, 8 and 12 weeks after the infusion. Tumor size is monitored every month with CT scans, and possibly also with a PET or bone marrow aspiration and biopsy, for the first 3 months after the cells are infused. Thereafter, visits are less frequent (every 3 months, then every 6 months, and then yearly) during a minimum 5-year follow-up.