title: Loss of lymphocyte chalone activity in mice with autoimmune disease.
abstract: Lymphocyte chalone from the spleens of old BALB/c, young BALB/c and young NZB mice caused significant suppression of the proliferative response of BALB/c and NZB spleen cells to T and B mitogens, whereas lymphocyte chalone from old NZB spleen did not suppress. Lymphocyte chalone from young and old NZB mice was tested using different ages of NZB/NZW responding spleen cells; at all ages concanavalin A- and lipopolysaccharide-induced proliferation was suppressed less by the chalone from old NZB mice than from that of young NZB mice. The responding NZB/NZW cells were suppressed equivalently at all ages studied. The basis for the loss of lymphocyte chalone activity in old NZB mice remains unknown; however, it appears likely that this event has a role in the disturbance of the negative feedback control system which contributes to NZB autoimmune disease.
mesh_terms: D000375:Aging; D000818:Animals; D001327:Autoimmune Diseases / Q000276:immunology*; D003208:Concanavalin A / Q000494:pharmacology; D006131:Growth Inhibitors / Q000494:pharmacology*; D007165:Immunosuppression Therapy; D008213:Lymphocyte Activation; D008214:Lymphocytes / Q000276:immunology*; D051379:Mice; D008807:Mice, Inbred BALB C; D008814:Mice, Inbred NZB; D013154:Spleen / Q000276:immunology
chemical_list: D006131:Growth Inhibitors; D003208:Concanavalin A