title: T lymphocyte depletion of human peripheral blood and bone marrow using monoclonal antibodies and magnetic microspheres.
abstract: It has previously been demonstrated that graft-versus-host disease can be overcome in patients receiving HLA-mismatched bone marrow transplants by prior in vitro depletion of T lymphocytes from the marrow. In this report we describe the use of monoclonal antibodies and magnetic microspheres for the depletion of T cells from peripheral blood and bone marrow. The target cells are sensitized with antibodies directed against the CD2, CD3, CD4 and/or CD8 cell surface antigens, captured by magnetic beads coated with sheep anti-mouse IgG antibody and collected by placing the cell suspension in a magnetic field. This simple, rapid procedure results in the efficient removal of T cells from peripheral blood and from bone marrow without affecting the colony-forming potential of normal hematopoietic stem cells. The procedure is capable of being scaled up for the treatment of larger volumes of marrow that are required for clinical transplantation.
mesh_terms: D000911:Antibodies, Monoclonal / Q000276:immunology*; D000945:Antigens, Differentiation, T-Lymphocyte / Q000276:immunology; D001854:Bone Marrow Cells; D016026:Bone Marrow Transplantation; D018801:CD2 Antigens; D017252:CD3 Complex; D002469:Cell Separation / Q000379:methods; D006410:Hematopoiesis; D006801:Humans; D008213:Lymphocyte Activation; D008280:Magnetics; D008934:Mitogens; D011948:Receptors, Antigen, T-Cell / Q000276:immunology; D011971:Receptors, Immunologic / Q000276:immunology; D013601:T-Lymphocytes / Q000166:cytology* / Q000276:immunology
chemical_list: D000911:Antibodies, Monoclonal; D000945:Antigens, Differentiation, T-Lymphocyte; D018801:CD2 Antigens; D017252:CD3 Complex; D008934:Mitogens; D011948:Receptors, Antigen, T-Cell; D011971:Receptors, Immunologic