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TCRalpha/beta and CD19+ depleted Hematopoietic Stem Cell Transplant from Closely Matched Unrelated Donors or Haploidentical Related donors for Blood Disorders in Children and Young Adults

Trial Status: approved

This phase I trial studies the side effects of TCRalpha/beta and CD19+ depleted cell given during hematopoietic stem cell transplant in treating patients with blood disorders. Researchers want to see if they can take peripheral blood stem cells from either an adult family member with only half of the same HLA genes as the stem cell donor (haploidentical) or a closely matched unrelated donor, and run them through a special lab instrument to remove alpha/beta T cells and B cells and then give them to treat the blood disorder. T cells are a type of immune cell (white blood cell) that plays an important role in preventing and eliminating infections. There are different types of T cells and each type has specific tasks. One of these T cell types is called an “alpha/beta T cell”. They combat infection but they can cause graft-versus-host disease. TCRalpha/beta and CD19+ depleted cells may work better in treating blood disorders without causing graft-versus-host disease.