title: Clonal analysis of B cell growth and differentiation activities induced from T lymphocytes upon triggering of T3-Ti and T11 pathways.
abstract: The cellular origin of B cell growth factors (BCGF) and differentiation factors (BCDF) was investigated in the present study. For this purpose, T4+ and T8+ T cell clones were obtained from human peripheral blood, activated via stimulation of either the antigen/MHC receptor (T3-Ti molecular complex) or the antigen-independent alternative pathway (T11 molecule), and subsequently examined for their capacity to induce B cell proliferation and immunoglobulin production. The results showed that 1) BCGF is produced by both T4+ and T8+ T cells at the population level as well as at the clonal level; 2) BCDF activity, in contrast, is largely but not exclusively restricted to the T4+ subset; and 3) both the T3-Ti and T11 pathways activate individual clonal T cell populations to promote B cell growth and differentiation.
authors.forename: C
authors.initials: C
authors.lastname: Milanese
authors.forename: A
authors.initials: A
authors.lastname: Bensussan
authors.forename: E L
authors.initials: EL
authors.lastname: Reinherz
mesh_terms: D000917:Antibody Formation; D000944:Antigens, Differentiation, B-Lymphocyte; D000945:Antigens, Differentiation, T-Lymphocyte; D000954:Antigens, Surface / Q000276:immunology; D001402:B-Lymphocytes / Q000276:immunology*; D002454:Cell Differentiation; D002478:Cells, Cultured; D006133:Growth Substances / Q000276:immunology*; D006801:Humans; D015847:Interleukin-4; D008213:Lymphocyte Activation; D008211:Lymphocyte Cooperation; D008222:Lymphokines / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology*; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology; D050378:T-Lymphocytes, Regulatory / Q000276:immunology
chemical_list: D000944:Antigens, Differentiation, B-Lymphocyte; D000945:Antigens, Differentiation, T-Lymphocyte; D000954:Antigens, Surface; D006133:Growth Substances; D008222:Lymphokines; D015847:Interleukin-4