title: Il-3-dependent mouse clones that express B-220 surface antigen, contain Ig genes in germ-line configuration, and generate B lymphocytes in vivo.
abstract: The continuously proliferating clones L/B AgA2, CB/Bm 7, Ba/C1, and Bc/Bm 11 were established from bone marrow of MRL/LPR, CBA/J, and BALB/c mice. These clones carry the B cell lineage surface antigen B-220 but not antigens normally expressed on mature B lymphocytes, myeloid cells, or T lymphocytes. Their immunoglobulin mu heavy chain and kappa light chain genes are in germ-line configuration. The G418 resistance gene was introduced into each clone with a retrovirus vector and then used as a selective marker for the progeny of transfected cells. Clones L/B AgA2, CB/Bm 7, and Bc/Bm 11, but not Ba/C1, could develop into antibody-secreting cells after in vivo transfer. None gave rise to cells responsive to polyclonal T cell activators, nor did any differentiate into cells that could develop into granulocyte/macrophage-colony-forming cells in vitro. All grew in interleukin 3 but not in other cytokines. We conclude that clones L/B AgA2, CB/Bm 7, and Bc/Bm 11 are early precursors of B lymphocytes.
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology; D000954:Antigens, Surface; D001402:B-Lymphocytes / Q000187:drug effects / Q000276:immunology*; D002454:Cell Differentiation; D002455:Cell Division; D002999:Clone Cells; D003907:Dexamethasone / Q000494:pharmacology; D005260:Female; D005796:Genes; D005839:Gentamicins / Q000494:pharmacology; D007143:Immunoglobulin Heavy Chains / Q000235:genetics*; D007147:Immunoglobulin Light Chains / Q000235:genetics*; D007145:Immunoglobulin kappa-Chains / Q000235:genetics*; D007148:Immunoglobulin mu-Chains / Q000235:genetics*; D007377:Interleukin-3; D008070:Lipopolysaccharides / Q000494:pharmacology; D008213:Lymphocyte Activation; D008222:Lymphokines / Q000494:pharmacology*; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008808:Mice, Inbred CBA
chemical_list: D000900:Anti-Bacterial Agents; D000954:Antigens, Surface; D005839:Gentamicins; D007143:Immunoglobulin Heavy Chains; D007147:Immunoglobulin Light Chains; D007145:Immunoglobulin kappa-Chains; D007148:Immunoglobulin mu-Chains; D007377:Interleukin-3; D008070:Lipopolysaccharides; D008222:Lymphokines; D003907:Dexamethasone; C010680:antibiotic G 418