The role of macrophages in anti-idiotypic antibody and T suppressor factor induction of timothy grass pollen antigen B-specific T suppressor cells.
Cultures of normal spleen cells with anti-idiotypic antibody (anti-Id) or antigen B (AgB)-specific T suppressor factor (Tsf1) in mini-Marbrook chambers for 4 days at 37 degrees C lead to the in vitro induction of AgB-specific T suppressor (TS) cells. These TS cells significantly suppress a secondary AgB-specific IgE response, but they do not affect a secondary AgB-specific IgG response. Depletion of both B cells and macrophages from normal spleen cells by panning on anti-Ig-coated petri dishes provides an enriched T cell population. These enriched T cells when cultured with anti-Id or Tsf1 in mini-Marbrook chambers do not produce AgB-specific TS cells, and mice treated with cells harvested from the mini-Marbrook chambers have normal secondary AgB-specific IgG and IgE responses. The addition of as few as 1000 bone marrow-derived macrophages (BMDM) to cultures of the enriched T cells with anti-Id, or Tsf1 restores the ability of these cultures to produce significant levels of AgB-specific TS cells. Further studies reveal that the macrophage population must be histocompatible and express a cell surface I-J antigen. Attempts to pulse BMDM with anti-Id or Tsf1 at 4 degrees C and to culture in mini-Marbrook chambers 10(3) pulsed BMDM with enriched T cells were unsuccessful in producing AgB-specific TS cells. However, pulsing BMDM with anti-Id or Tsf1 at 37 degrees C, and adding 10(3) of these pulsed BMDM to enriched T cells in culture led to the formation of significant levels of AgB-specific TS cells.
D000818:Animals; D000938:Antigen-Presenting Cells / Q000276:immunology; D001402:B-Lymphocytes / Q000276:immunology*; D002478:Cells, Cultured; D000949:Histocompatibility Antigens Class II / Q000276:immunology; D007108:Immune Tolerance; D007130:Immunoglobulin Idiotypes / Q000276:immunology*; D008264:Macrophages / Q000276:immunology*; D051379:Mice; D006109:Poaceae / Q000276:immunology; D011058:Pollen / Q000276:immunology; D013491:Suppressor Factors, Immunologic / Q000276:immunology*; D050378:T-Lymphocytes, Regulatory / Q000276:immunology*; D013696:Temperature
D000949:Histocompatibility Antigens Class II; D007130:Immunoglobulin Idiotypes; D013491:Suppressor Factors, Immunologic