title: B-cell activating properties of polymyxin B.
abstract: Polymyxins are known to be inhibitors of certain polyclonal B cell activators such as lipopolysaccharide and dextransulphate. However, increased specific responses to hapten-coupled mitogens have been reported after the addition of polymyxins to superoptimal conjugate doses. In this paper we have studied the effect of polymyxin B on superoptimal polyclonal doses of lipopolysaccharide. Results similar to those reported for hapten-lipopolysaccharide conjugates were obtained. Polymyxin B was also found to exert adjuvant properties for a primary immune response to sheep erythrocytes and to be a thymus-independent antigen.
mesh_terms: D000818:Animals; D001402:B-Lymphocytes / Q000276:immunology*; D002478:Cells, Cultured; D004247:DNA / Q000096:biosynthesis; D007114:Immunization; D008070:Lipopolysaccharides / Q000494:pharmacology; D008213:Lymphocyte Activation / Q000187:drug effects*; D051379:Mice; D008815:Mice, Inbred Strains; D011112:Polymyxin B / Q000494:pharmacology*; D011113:Polymyxins / Q000494:pharmacology*
chemical_list: D008070:Lipopolysaccharides; D011113:Polymyxins; D004247:DNA; D011112:Polymyxin B