title: Macrophage dependency of T-lymphocyte mitogenesis by Nocardia rubra cell-wall skeleton.
abstract: The mitogenic activity of the cell-wall skeleton (CWS) of Nocardia rubra on purified splenic T-cells (thymus-derived lymphocytes) was investigated. N. rubra CWS showed remarkable mitogenic activity on normal spleen cells of C57BL/6J mice at concentrations ranging from 10 to 100 microgram per milliliter of culture medium, while, on purified splenic T-cells, N. rubra CWS did not act as an mitogen at any concentration. However, mitogenic activity of N. rubra CWS on T-cells was restored if purified splenic T-cells was reconstituted with X-irradiated peritoneal exudate cells (macrophages). The above results suggest the necessity of macrophages for T-lymphocyte activation by N. rubra CWS as well as PHA-P or Con A.
mesh_terms: D000818:Animals; D002473:Cell Wall; D003208:Concanavalin A / Q000494:pharmacology; D037102:Lectins / Q000494:pharmacology; D008213:Lymphocyte Activation; D008264:Macrophages / Q000276:immunology*; D051379:Mice; D008810:Mice, Inbred C57BL; D008934:Mitogens; D009615:Nocardia / Q000648:ultrastructure*; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D037102:Lectins; D008934:Mitogens; D003208:Concanavalin A