title: Ontogeny of culture-generated suppressor cells.
abstract: Culture of murine lymphoid cells without added antigen results in the generation of cells which suppress a variety of in vitro immune responses, such as the mixed lymphocyte response (MLR) and the generation of alloreactive cytotoxic T cells (CTL). The ontogeny of this phenomenon was studied. Cells which suppressed the MLR after preculture were isolated from spleens and hematopoietic livers of fetal and young (less than 1 wk old) mice. On the other hand, the generation of alloreactive CTL could be suppressed only by precultured spleen cells taken from 1-w-old or older mice. The parallel between the development of the suppressor functions and the maturation of the responses they regulate, suggests a possible biological significance of the effect.
mesh_terms: D000818:Animals; D002455:Cell Division; D002478:Cells, Cultured; D003602:Cytotoxicity, Immunologic; D006410:Hematopoiesis; D007519:Isoantigens; D008099:Liver / Q000196:embryology / Q000276:immunology*; D007959:Lymphocyte Culture Test, Mixed; D051379:Mice; D013154:Spleen / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology; D050378:T-Lymphocytes, Regulatory / Q000276:immunology*
chemical_list: D007519:Isoantigens