title: Association between immunogenicity and adsorption of a recombinant Streptococcus pneumoniae vaccine antigen by an aluminum adjuvant.
abstract: The impact on immunogenicity of the degree of adsorption of three Streptococcus pneumoniae (Sp) vaccine antigens to aluminum adjuvants was studied. The three antigens evaluated (Sp1, Sp2 and Sp3) were highly adsorbed by aluminum hydroxide adjuvant, but not adsorbed by aluminum phosphate adjuvant. All of the Sp antigens adjuvanted with aluminum hydroxide elicited higher antibody responses in mice than formulations prepared with aluminum phosphate or non-adjuvanted antigen. Varying the percent aluminum-bound Sp antigen in the formulated vaccine affected the observed antibody responses. These observations suggest that the antibody response observed for Sp antigens in this study is stimulated by a depot effect of the antigen bound to an aluminum adjuvant.
authors.affiliation: ID Biomedical Corporation of Northborough, Northborough, Massachusetts 01532, USA.
authors.forename: Philip M
authors.initials: PM
authors.lastname: Levesque
authors.forename: Kimberly
authors.initials: K
authors.lastname: Foster
authors.forename: Uditha
authors.initials: U
authors.lastname: de Alwis
mesh_terms: D000042:Absorption; D000276:Adjuvants, Immunologic / Q000494:pharmacology*; D017607:Aluminum Compounds / Q000494:pharmacology*; D000536:Aluminum Hydroxide / Q000494:pharmacology*; D000818:Animals; D000907:Antibodies, Bacterial / Q000032:analysis / Q000096:biosynthesis; D000942:Antigens, Bacterial / Q000276:immunology* / Q000302:isolation & purification; D003692:Delayed-Action Preparations; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D007115:Immunization Schedule; D051379:Mice; D008807:Mice, Inbred BALB C; D008970:Molecular Weight; D010710:Phosphates / Q000494:pharmacology*; D022541:Streptococcal Vaccines / Q000276:immunology*; D013296:Streptococcus pneumoniae / Q000276:immunology*; D014614:Vaccines, Synthetic / Q000276:immunology
chemical_list: D000276:Adjuvants, Immunologic; D017607:Aluminum Compounds; D000907:Antibodies, Bacterial; D000942:Antigens, Bacterial; D003692:Delayed-Action Preparations; D010710:Phosphates; D022541:Streptococcal Vaccines; D014614:Vaccines, Synthetic; D000536:Aluminum Hydroxide; C012714:aluminum phosphate