title: Contrasting feature in the repopulation of host-type T cells in the spleens of F1----P and P----F1 radiation bone marrow chimeras.
abstract: The regeneration and persistence of host- and donor-derived T cells were examined in the thymus as well as the spleen of mouse radiation bone marrow chimeras of two semiallogeneic combinations (F1----P, P----F1) with different Thy-1 markers on T cells of donor and host origins. An unexpectedly large number of host-type T cells were recovered from the spleens of F1----P chimeras, amounting to as high as 45 and 25% of total T cells at 6 and 14 weeks after bone marrow transplantation (BMT), respectively. To the contrary, the residual host-type T cells in the spleens of P----F1 chimeras disappeared quickly, resulting in less than 0.1% of total T cells at 6 weeks after BMT. It was also revealed that the number of host-type T cells in the spleens of F1----P chimeras decreased in proportion to increase of radiation dose given to the recipients.
mesh_terms: D000818:Animals; D016026:Bone Marrow Transplantation; D004307:Dose-Response Relationship, Radiation; D006085:Graft Survival; D006183:H-2 Antigens / Q000235:genetics / Q000276:immunology; D006648:Histocompatibility; D051379:Mice; D008815:Mice, Inbred Strains / Q000276:immunology; D011828:Radiation Chimera; D013154:Spleen / Q000166:cytology; D013601:T-Lymphocytes / Q000276:immunology / Q000637:transplantation*; D013950:Thymus Gland / Q000166:cytology
chemical_list: D006183:H-2 Antigens