title: Enhanced immune recognition of H-2 antigen-deficient murine lung carcinoma cells following treatment with dimethyl sulfoxide.
abstract: Dimethyl sulfoxide (DMSO) has previously been shown to increase the surface expression of H-2K and H-2D antigens on cultured line 1 carcinoma cells. H-2 densities increase from initial levels barely detectable with flow cytometry to those found on normal BALB/c spleen cells. Here we compare the susceptibilities of untreated and DMSO-treated line 1 cells to lysis mediated by H-2d specific monoclonal antibodies and complement, cytotoxic T-cells, and natural killer cells. Induced H-2 antigens appear to function normally in that DMSO-treated cells are highly susceptible to all types of H-2 restricted immune lysis, whereas untreated line 1 cells are not. DMSO does not increase lysis of line 1 cells mediated by natural killer cells. Our results suggest that DMSO could be used to make the growth of major histocompatibility complex antigen-deficient tumors more sensitive to T-cell-mediated immunological resistance.
mesh_terms: D000818:Animals; D000951:Antigens, Neoplasm / Q000276:immunology; D002277:Carcinoma / Q000276:immunology*; D003602:Cytotoxicity, Immunologic / Q000187:drug effects; D004121:Dimethyl Sulfoxide / Q000494:pharmacology*; D006183:H-2 Antigens / Q000276:immunology*; D007518:Isoantibodies / Q000276:immunology; D007694:Killer Cells, Natural / Q000276:immunology; D008175:Lung Neoplasms / Q000276:immunology*; D051379:Mice; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D000951:Antigens, Neoplasm; D006183:H-2 Antigens; D007518:Isoantibodies; D004121:Dimethyl Sulfoxide