title: Studies of CD4- CD8- alpha beta bone marrow T cells with suppressor activity.
abstract: The predominant T cell subset in the bone marrow of specific pathogen-free C57BL/Ka and BALB/c mice expressed the alpha beta+ TCR CD4- CD8- surface phenotype. Purified C57BL/Ka alpha beta+ TCR CD4- CD8- marrow cells obtained by cell sorting suppressed the MLR of C57BL/Ka responder and BALB/c stimulator spleen cells. Although the percentage of typical T cells in the spleen was markedly reduced in adult nude mice or normal neonatal mice as compared to the normal adult, the percentage of alpha beta+ TCR CD4- CD8- cells in the spleen and marrow was not. The percentage of "self-reactive" V beta 5+ T cells in the BALB/c spleen was markedly reduced as compared to that in the C57BL/Ka spleen. However, the percentages in the bone marrow were similar. The results indicate that the predominant subset of marrow T cells in these pathogen-free mice differ with regard to surface marker phenotype, function, dependence on the adult thymus, and deletion of certain self-reactive V beta receptors as compared to typical spleen T cells. The marrow T cells appear to develop directly from marrow precursors without rearranged beta chain genes during a 48 hour in vitro culture.
authors.affiliation: Department of Medicine, Stanford University School of Medicine, CA 94305.
authors.forename: V
authors.initials: V
authors.lastname: Palathumpat
authors.forename: S
authors.initials: S
authors.lastname: Dejbakhsh-Jones
authors.forename: B
authors.initials: B
authors.lastname: Holm
authors.forename: H
authors.initials: H
authors.lastname: Wang
authors.forename: O
authors.initials: O
authors.lastname: Liang
authors.forename: S
authors.initials: S
authors.lastname: Strober
mesh_terms: D000818:Animals; D001483:Base Sequence; D001854:Bone Marrow Cells; D015704:CD4 Antigens / Q000032:analysis*; D016827:CD8 Antigens / Q000032:analysis*; D015333:Gene Rearrangement, beta-Chain T-Cell Antigen Receptor; D007959:Lymphocyte Culture Test, Mixed; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D008969:Molecular Sequence Data; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000032:analysis*; D016176:T-Lymphocyte Subsets / Q000276:immunology; D050378:T-Lymphocytes, Regulatory / Q000276:immunology*; D013950:Thymus Gland / Q000502:physiology
chemical_list: D015704:CD4 Antigens; D016827:CD8 Antigens; D016693:Receptors, Antigen, T-Cell, alpha-beta