title: An immunological suppressor cell inactivating cytotoxic T-lymphocyte precursor cells recognizing it.
abstract: The immune system does not normally react against self components. Originally, it was postulated that self-reactive cells were somehow deleted or blocked. More recent thinking is that such cells are suppressed by regulatory networks similar to those limiting the immune response against non-self determinants. Both mechanisms may exist. I describe here a type of suppression more closely related to the first postulate. In the in vitro, one-way, mixed lymphocyte reaction (MLR), cytotoxic T-lymphocyte precursor cells (CLP) from the responder population give rise to cytotoxic T-lymphocytes (CL) capable of lysing target cells from the stimulator population. A subpopulation of cells in the spleen of athymic nude mice can, when added to such cultures, inactivate CLP capable of recognizing either the H-2 antigens or TNP modifications of the nude spleen. Regarding the nude spleen cells, activation of self-reactive cells is being prevented.
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D003602:Cytotoxicity, Immunologic; D006183:H-2 Antigens; D007108:Immune Tolerance; D051379:Mice; D008819:Mice, Nude / Q000276:immunology; D013154:Spleen / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*; D050378:T-Lymphocytes, Regulatory / Q000276:immunology*; D014301:Trinitrobenzenes / Q000276:immunology
chemical_list: D006183:H-2 Antigens; D014301:Trinitrobenzenes