title: Selective stimulation of murine cytotoxic T cell and antibody responses by particulate or monomeric hepatitis B virus surface (S) antigen.
abstract: In the murine system, we tested in vivo the immunogenicity of different preparations of the yeast-derived surface antigen (S-antigen or S-protein) of hepatitis B virus (HBV). Native S-protein molecules self-assemble into stable 22-nm particles. BALB/c mice immunized with low doses of native S-particles without adjuvants efficiently generated an H-2 class I-restricted CD8+ cytotoxic T lymphocyte (CTL) response, and developed easily detectable serum antibody titers against conformational determinants of the native S-particle or linear epitopes of the denatured S-protein. Disruption of S-particles with sodium dodecyl sulfate and beta-2-mercaptoethanol generated p24 S-monomers. Injection of an equal dose of S-monomers into mice efficiently primed CTL, but did not stimulate an antibody response against conformational or linear epitopes of the native or denatured S-protein. In vivo priming of CTL by S-particles or S-monomers required "endogenous" processing of the antigen because the injection of an equimolar (or higher) dose of an antigenic, S-derived 12-mer peptide into mice did not prime CTL. Native (particulate) or denatured (monomeric) S-antigen injected with mineral oil (incomplete Freund's adjuvant) or aluminum hydroxide failed to stimulate a CTL response. Hence, different preparations can be produced from a small protein antigen which specifically stimulate selected compartments of the immune system.
authors.affiliation: Department of Bacteriology, University of Ulm, FRG.
authors.forename: R
authors.initials: R
authors.lastname: Schirmbeck
authors.forename: K
authors.initials: K
authors.lastname: Melber
authors.forename: T
authors.initials: T
authors.lastname: Mertens
authors.forename: J
authors.initials: J
authors.lastname: Reimann
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D003601:Cytotoxicity Tests, Immunologic; D005260:Female; D006510:Hepatitis B Antibodies / Q000096:biosynthesis* / Q000097:blood; D006514:Hepatitis B Surface Antigens / Q000737:chemistry* / Q000276:immunology*; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008969:Molecular Sequence Data; D010446:Peptide Fragments / Q000276:immunology; D013154:Spleen / Q000166:cytology; D013602:T-Lymphocytes, Cytotoxic / Q000502:physiology*; D014162:Transfection; D014407:Tumor Cells, Cultured
chemical_list: D006510:Hepatitis B Antibodies; D006514:Hepatitis B Surface Antigens; D010446:Peptide Fragments