title: Sequential analysis of the thymocyte differentiation in fully allogeneic bone marrow chimera in mice. II. Further characterization of the CD4+ or CD8+ single positive thymocytes.
abstract: Differentiation of CD4+8- and CD4-8+ single-positive (SP) thymocytes in fully allogeneic bone marrow chimeras were investigated using multicolor cytometric analysis. The proportion of CD3+ cells in CD4+ SP population derived from donor mice considerably increased between day 12 and 14 after bone marrow transplantation (BMT), and gradually increased thereafter. The proportion of V beta 8+ cells in the CD3+CD4+ population remained constant (around 20%) at each period, suggesting that alpha and beta chains were used as TCR. The proportion of J11d+ cells in the CD4+ SP thymocytes transiently increased from day 12 to 14 and decreased thereafter, even though almost half of CD4+ SP cells were still dull J11d+ at day 35 after BMT. When CD8+ SP populations were analyzed, the proportion of CD3+ cells was very small until day 18. Thereafter, the proportion considerably increased and reached a maximum (83.2%) at day 21. The proportion of V beta 8+ cells in the CD3+ CD8+ SP population fell within range between 20 and 30%. However, before day 18, most of the V beta 8+ cells were dull positive, while after day 21 the majority were bright V beta 8+. Further, CD8+ SP cells at day 12, 14 and 18 were largely bright J11d+. After day 21, however, the proportion of bright J11d+ cells rapidly decreased. Similar results were obtained when the sequence of appearance of CD4+ and CD8+ SP cells was compared among bright CD3+, bright V beta 8+ or J11d- mature populations. The CD4+ SP cells regularly appeared earlier than CD8+ SP cells in the mature populations. These findings indicate that a considerable heterogeneity exists within both CD4+ and CD8+ SP populations and that the differentiation process for CD4+ SP cells precedes that for CD8+ SP cells.
authors: Institute of Immunological Science, Hokkaido University, Sapporo, Japan.
authors: H
authors: H
authors: Arase
authors: N
authors: N
authors: Fukushi
authors: S
authors: S
authors: Hatakeyama
authors: K
authors: K
authors: Ogasawara
authors: K
authors: K
authors: Iwabuchi
authors: C
authors: C
authors: Iwabuchi
authors: I
authors: I
authors: Negishi
authors: R A
authors: RA
authors: Good
authors: K
authors: K
authors: Onoé
mesh_terms: D000818:Animals; D000945:Antigens, Differentiation, T-Lymphocyte / Q000032:analysis; D015415:Biomarkers / Q000032:analysis; D016026:Bone Marrow Transplantation / Q000473:pathology*; D002454:Cell Differentiation; D002469:Cell Separation; D005434:Flow Cytometry; D051379:Mice; D008806:Mice, Inbred AKR; D008810:Mice, Inbred C57BL; D011828:Radiation Chimera; D011948:Receptors, Antigen, T-Cell / Q000032:analysis; D013601:T-Lymphocytes / Q000276:immunology*; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology; D050378:T-Lymphocytes, Regulatory / Q000276:immunology; D013950:Thymus Gland / Q000166:cytology*
chemical_list: D000945:Antigens, Differentiation, T-Lymphocyte; D015415:Biomarkers; D011948:Receptors, Antigen, T-Cell