[The effect of cells presenting the erythroblast antigen on the natural suppressor activity of nonadhesive bone marrow cells].
Concanavalin A-induced proliferation of spleen cells of C57B1/6 mice was inhibited by syngeneic normal bone marrow cells. Elimination of Ag-Eb-positive cells by panning was shown to result in markedly reduced inhibitory activity of bone marrow cells. To evaluate the role of Ag-Eb in natural suppressor activity, bone marrow cells were preincubated with different dilutions of MAE-15 monoclonal antibody and then added to spleen cells. The inhibitory effect of bone marrow cells decreased with the increasing concentration of the monoclonal antibody in a dose-dependent manner and nearly disappeared at a concentration of MAE-15 of 150 m micrograms/ml and 300 m micrograms/ml. In control experiments, bone marrow cells were preincubated with antibodies non-reactive with Ag-Eb under the same conditions. It is concluded that the decrease of natural suppressor activity after incubation of bone marrow cells with MAE-15 monoclonal antibody is specific for anti-Ag-Eb antibodies.
S A
SA
Kusmartsev
I M
IM
Agranovich
Iu P
IuP
Bel'skiĭ
M A
MA
Goncharskaia
D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology; D000918:Antibody Specificity / Q000276:immunology; D000938:Antigen-Presenting Cells / Q000276:immunology*; D001853:Bone Marrow / Q000276:immunology*; D001854:Bone Marrow Cells; D002448:Cell Adhesion / Q000276:immunology; D002455:Cell Division / Q000187:drug effects; D003208:Concanavalin A / Q000494:pharmacology; D004306:Dose-Response Relationship, Immunologic; D004900:Erythroblasts / Q000276:immunology*; D007108:Immune Tolerance / Q000276:immunology*; D007694:Killer Cells, Natural / Q000276:immunology*; D012515:Mast-Cell Sarcoma / Q000276:immunology; D051379:Mice; D008810:Mice, Inbred C57BL; D013154:Spleen / Q000166:cytology / Q000187:drug effects / Q000276:immunology
D000911:Antibodies, Monoclonal; D003208:Concanavalin A