title: Murine B cell differentiation lineages.
abstract: Subpopulations of mouse B cells express different amounts of two antigens (BLA-1 and BLA-2) recognized by rat monoclonal antibodies (53-10.1 and 30-E2). Two-color immunofluorescence analysis on the fluorescence-activated cell sorter (FACS) shows that the 53-10.1 monoclonal antibody reacts with a similar proportion of splenic B cells from normal and CBA/N (xid) mice, whereas 30-E2 reacts with most CBA/N B cells but with only a fraction of normal B cells. Data from three- and four-color immunofluorescence analyses with xid, athymic (nude), and normal mice suggest that the order in which these antigens are lost during B cell differentiation distinguishes two B cell lineages: immature B cells express both antigens, intermediate-stage B cells of one or the other lineage express only BLA-1 or only BLA-2, respectively, and mature resting B cells express neither. CBA/N mice lack one of the putative intermediate populations (BLA-1+,2-); thus, this population apparently gives rise to the predominant mature B cell population, which is present in normal adult spleen and lymph node but is missing in CBA/N. The other putative intermediate population (BLA-1-,2+) is decreased by two- to threefold in spleens from nude mice compared with strain-matched controls. Both BLA-1 and BLA-2 antigens rapidly reappear after specific (antigen) or nonspecific (lipopolysaccharide) B cell activation. IgM plaque-forming cells (PFC) derived from such activated cells continue to express both antigens while IgG PFC express only BLA-1.
mesh_terms: D000375:Aging; D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology; D000944:Antigens, Differentiation, B-Lymphocyte; D000954:Antigens, Surface / Q000235:genetics / Q000276:immunology; D000955:Antigens, T-Independent / Q000276:immunology; D001402:B-Lymphocytes / Q000145:classification / Q000166:cytology / Q000276:immunology*; D002454:Cell Differentiation; D005434:Flow Cytometry; D005455:Fluorescent Antibody Technique; D007399:Interphase; D008070:Lipopolysaccharides / Q000494:pharmacology; D008213:Lymphocyte Activation; D051379:Mice; D008807:Mice, Inbred BALB C; D008808:Mice, Inbred CBA; D008819:Mice, Nude; D051381:Rats
chemical_list: D000911:Antibodies, Monoclonal; D000944:Antigens, Differentiation, B-Lymphocyte; D000954:Antigens, Surface; D000955:Antigens, T-Independent; D008070:Lipopolysaccharides