title: Murine plasma cells secreting more than one class of immunoglobulin heavy chain. III. Immunoglobulin production by established cultures and cloned lines of SAMM 368.
abstract: SAMM 368, a plasmacytoma which produces IgA-kappa and IgG2b-kappa was established  in vitro from primary explants or after animal passage. The 9 lines that were established produced both paraproteins. The production of both immunoglobulins by single cells was demonstrated by immunofluorescent staining and cloning. Continuous culture of 3 parent lines for 18 months and 11 cloned lines for periods from 5 to 7 months demonstrated that double production is a stable characteristic of this plasmacytoma. Two single paraprotein-producing varients (IgG2b or IgA) were derived when cells were cultured in the presence of Fungizone. Chromosomal analysis of SAMM 368 indicates that this double producing tumor has a modal number similar to those observed in myelomas producing a single immunoglobulin class.
mesh_terms: D002460:Cell Line; D002869:Chromosome Aberrations; D002999:Clone Cells; D007070:Immunoglobulin A / Q000096:biosynthesis; D007074:Immunoglobulin G / Q000096:biosynthesis; D007147:Immunoglobulin Light Chains / Q000096:biosynthesis*; D007145:Immunoglobulin kappa-Chains / Q000096:biosynthesis*; D009374:Neoplasms, Experimental / Q000235:genetics / Q000276:immunology; D010950:Plasma Cells / Q000276:immunology*; D010954:Plasmacytoma / Q000235:genetics / Q000276:immunology*; D011003:Ploidies
chemical_list: D007070:Immunoglobulin A; D007074:Immunoglobulin G; D007147:Immunoglobulin Light Chains; D007145:Immunoglobulin kappa-Chains