title: [Relation between Ia antigens and Ir gene products. A theory on the development of the immune response].
abstract: To explain the relations between Ia and Ir, we propose the following hypothesis. It would exist an antigen specific factor released by T lymphocytes. This factor would be constituted by two parts: a variable fragment forming the antigenic receptor of T cells and coded by Ir genes, a constant fragment transmitting a helper or suppressor signal and carrying Ia antigens. Ia antigens would allow a mutual recognition between macrophages, T lymphocytes and B lymphocytes and a recognition by these cells of some mediators released during immune response. Ir genes products would allow the antigen recognition, if they correspond to the antigenic receptor of T lymphocytes.
mesh_terms: D000818:Animals; D000917:Antibody Formation; D001402:B-Lymphocytes / Q000276:immunology; D005802:Genes, MHC Class II; D000949:Histocompatibility Antigens Class II / Q000276:immunology*; D006801:Humans; D007108:Immune Tolerance; D007136:Immunoglobulins / Q000276:immunology; D008264:Macrophages / Q000276:immunology; D051379:Mice; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D000949:Histocompatibility Antigens Class II; D007136:Immunoglobulins
vernacular_title: Relations entre antigènes Ia et produits des gènes Ir. Une théorie sur le déroulement de la réponse immunitaire.