title: Modification of lipopolysaccharide non-responder cells in low cell density culture.
abstract: Lipopolysaccharide (LPS) fails to induce polyclonal antibody responses in LPS non-responder C3H/HeJ mice in vivo and also in in vitro cultures of 10(7) cells/ml of C3H/HeJ spleen cells. However, this study shows that LPS elicits polyclonal antibody synthesis in low cell density cultures of C3H/HeJ cells by activation of a translational process without an increase in total RNA and messenger RNA synthesis. Polyclonal antibody synthesis by LPS non-responder cells in low cell density culture was significantly increased by LPS in either serum-free medium or medium containing serum. LPS-induced antibody production by LPS non-responder cells in low cell density was not due to the relative elevation of LPS concentrations.
mesh_terms: D000818:Animals; D000917:Antibody Formation; D002452:Cell Count; D002478:Cells, Cultured; D007074:Immunoglobulin G / Q000096:biosynthesis; D007075:Immunoglobulin M / Q000096:biosynthesis; D008070:Lipopolysaccharides / Q000494:pharmacology*; D008214:Lymphocytes / Q000276:immunology* / Q000378:metabolism; D051379:Mice; D008809:Mice, Inbred C3H; D011132:Polyribosomes / Q000378:metabolism; D014176:Protein Biosynthesis; D012313:RNA / Q000096:biosynthesis; D013154:Spleen / Q000166:cytology
chemical_list: D007074:Immunoglobulin G; D007075:Immunoglobulin M; D008070:Lipopolysaccharides; D012313:RNA