title: Reduction and repopulation of recipient T4+ and T8+ T-lymphocytes in allogeneic bone marrow transplantation.
abstract: In eight recipients of allogeneic bone marrow grafts who had sex-mismatched donors, the reduction and subsequent repopulation of T4+ and T8+ T-lymphocytes of recipient origin were studied. The origin of the donor-recipient T4+ and T8+ T cells was studied using quinacrine staining of Y chromatin combined with T-cell typing for T4 and T8. Following chemoradiotherapy and bone marrow transplantation (BMT), T cells reached their nadir at a median of five (range 1-8) days after BMT. T8+ T cells decreased at a faster rate from the peripheral blood than T4+ T cells. The first T cells that appeared in the circulation at day 12 were predominantly T4+, and a large number of them were of recipient origin. Thereafter, they gradually decreased, and the numbers of T cells of donor origin increased. In the patients who had no or only minor complications, T4+ and T8+ T cells of donor origin repopulated the blood at similar rates. This pattern, however, was modified by severe graft-versus-host disease or by cytomegalovirus infection.
mesh_terms: D000911:Antibodies, Monoclonal; D016026:Bone Marrow Transplantation; D003131:Combined Modality Therapy; D004358:Drug Therapy; D006801:Humans; D007958:Leukocyte Count; D011878:Radiotherapy; D013601:T-Lymphocytes / Q000145:classification* / Q000528:radiation effects; D014184:Transplantation, Homologous
chemical_list: D000911:Antibodies, Monoclonal