title: Effect of the MER tubercle bacillus fraction on the responsiveness of mice to T-independent antigens.
abstract: The effect of treatment with the methanol extraction residue (MER) mycobacterial fraction on the immunological responsiveness of BALB/c mice to the T-independent antigens pneumococcal polysaccharide type III (SIIII) and trinitrophenyl-lipopolysaccharide conjugate (TNP-LPS) was ascertained. Pretreatment with MER prevented the establishment of immunological paralysis by threshold doses (10 or 15 microgram) of SIII and by a paralyzing dose of 100 microgram TNP-LPS. The induction of immunological paralysis by SIII was unaffected by treatment with the bacterial adjuvant Corynebacterium parvum and with the B cell mitogens PPD, LPS (Escherichia coli lipopolysaccharide), and dextran sulfate.
mesh_terms: D000818:Animals; D000907:Antibodies, Bacterial / Q000096:biosynthesis; D000917:Antibody Formation; D000942:Antigens, Bacterial; D005591:Chemical Fractionation; D005260:Female; D006462:Hemolytic Plaque Technique; D007158:Immunologic Techniques; D008070:Lipopolysaccharides / Q000276:immunology; D008297:Male; D000432:Methanol / Q000494:pharmacology*; D051379:Mice; D008807:Mice, Inbred BALB C; D009161:Mycobacterium / Q000276:immunology*; D011135:Polysaccharides, Bacterial / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*; D014301:Trinitrobenzenes / Q000276:immunology
chemical_list: D000907:Antibodies, Bacterial; D000942:Antigens, Bacterial; D008070:Lipopolysaccharides; D011135:Polysaccharides, Bacterial; D014301:Trinitrobenzenes; D000432:Methanol