title: Water-soluble adjuvant obtained from Bacterionema matruchotii.
abstract: The adjuvant effect of a butanol-extracted water-soluble adjuvant (bu-WSA) obtained from Bacterionemia matruchotii, a gram-positive oral bacteria, was studied on the antibody response at the plaque-forming cell (PFC) level in murine spleens. Intraperitoneal injection of Bu-WSA caused significant increase in direct PFC numbers in spleens 1 to 3 days after the antigenic stimulation with sheep erythrocytes (SRBC). Injection of 100 to 800 microgram of Bu-WSA was effective, and 400 microgram of Bu-WSA seemed to be the optimum for induction of the adjuvant effect. The adjuvant effect was strongest when Bu-WSA  was injected at the same time as the SRBC, but some effect was still observed when Bu-WSA was injected 7 days before or 1 day after the immunization. The adjuvant effect of Bu-WSA was greatest at high dose of antigen. The mice injected with Bu-WSA at the time of priming SRBC and then immunized with trinitrophenylated SRBC showed greater anti-trinitrophenyl PFC response than controls without the injection of Bu-WSA. These findings suggest that a part of the adjuvant effect of Bu-WSA depends on thymic cell function and another part does not.
mesh_terms: D000191:Actinomycetaceae / Q000276:immunology*; D000276:Adjuvants, Immunologic / Q000008:administration & dosage; D000818:Animals; D000921:Antibody-Producing Cells / Q000276:immunology*; D000941:Antigens; D004306:Dose-Response Relationship, Immunologic; D004912:Erythrocytes / Q000276:immunology; D006462:Hemolytic Plaque Technique; D007274:Injections, Intraperitoneal; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008813:Mice, Inbred ICR; D008819:Mice, Nude; D013154:Spleen / Q000276:immunology; D014301:Trinitrobenzenes / Q000276:immunology
chemical_list: D000276:Adjuvants, Immunologic; D000941:Antigens; D014301:Trinitrobenzenes