title: Immunologic enhancement of allogeneic tumor growth with soluble histocompatibility-2 antigens.
abstract: Soluble, partially purified, histocompatibility antigens that were obtained from the membranes of A/J spleen cells have been assayed for their capacity to elicit immunologic enhancement of two tumors of A-strain origin: YAA-C1 and Sarcoma I. Crude membrane material and a partially purified, soluble antigen that were contained in a specific fraction, obtained after chromatography on a Sephadex G-150 column, elicited enhancement; this fraction has been shown to contain immunogenic histocompatibility-2(a) antigens as well as alloantigenic specificities that were detected serologically. Another soluble fraction did not induce enhancement; this fraction has been shown to contain antigens other than H-2. Passive enhancement of both tumors was achieved with antisera produced in allogeneic mice that were inoculated with crude membrane material or with a fraction obtained by Sephadex G-150 chromatography. These antisera contained cytotoxic and/or hemagglutinating antibodies. Immunologic enhancement was specific. A readily enhanceable tumor, Py 89, of C57BL origin was not enhanced with anti-H-2(a) antisera. These results suggest strongly that all important H-2(a) transplantation antigenic determinants of spleen cells can be recovered by partial papain digestion and fractionation on a Sephadex G-150 column.
mesh_terms: D000818:Animals; D000906:Antibodies; D000937:Antigen-Antibody Reactions; D000941:Antigens; D002460:Cell Line; D002462:Cell Membrane / Q000276:immunology; D002470:Cell Survival; D002850:Chromatography, Gel; D000939:Epitopes; D006087:Graft vs Host Reaction; D006168:Guinea Pigs; D006384:Hemagglutination; D006648:Histocompatibility; D007106:Immune Sera; D007108:Immune Tolerance; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D012513:Sarcoma, Experimental / Q000276:immunology*; D013045:Species Specificity; D013154:Spleen; D014181:Transplantation Immunology
chemical_list: D000906:Antibodies; D000941:Antigens; D000939:Epitopes; D007106:Immune Sera