title: Parenteral and mucosal delivery of a novel multi-epitope M protein-based group A streptococcal vaccine construct: investigation of immunogenicity in mice.
abstract: Primary vaccine strategies against group A streptococci (GAS) have focused on the M protein--the target of opsonic antibodies important for protective immunity. We have previously reported protection of mice against GAS infection following parenteral delivery of a multi-epitope vaccine construct, referred to as a heteropolymer. This current report has assessed mucosal (intranasal (i.n.) and oral) delivery of the heteropolymer in mice with regard to the induction and specificity of mucosal and systemic antibody responses, and compared this to parenteral delivery. GAS-specific IgA responses were detected in saliva and gut upon i.n. and oral delivery of the heteropolymer co-administered with cholera toxin B subunit, respectively. High titre serum IgG responses were elicited to the heteropolymer following all routes of delivery when administered with adjuvant. Moreover, as with parenteral delivery, serum IgG antibodies were detected to the individual heteropolymer peptides following i.n. but not oral delivery. These data support the potential of the i.n. route in the mucosal delivery of a GAS vaccine.
authors.affiliation: Division of Infectious Diseases and Immunology, Cooperative Research Centre for Vaccine Technology, The Queensland Institute of Medical Research, P.O. Royal Brisbane Hospital, Qld 4029, Brisbane, Australia.
authors.forename: Linda A
authors.initials: LA
authors.lastname: Dunn
authors.forename: David J
authors.initials: DJ
authors.lastname: McMillan
authors.forename: Michael
authors.initials: M
authors.lastname: Batzloff
authors.forename: Weiguang
authors.initials: W
authors.lastname: Zeng
authors.forename: David C J
authors.initials: DC
authors.lastname: Jackson
authors.forename: Jacqueline A
authors.initials: JA
authors.lastname: Upcroft
authors.forename: Peter
authors.initials: P
authors.lastname: Upcroft
authors.forename: Colleen
authors.initials: C
authors.lastname: Olive
mesh_terms: D000281:Administration, Intranasal; D000284:Administration, Oral; D000818:Animals; D000917:Antibody Formation; D000942:Antigens, Bacterial; D001425:Bacterial Outer Membrane Proteins / Q000276:immunology*; D002352:Carrier Proteins / Q000276:immunology*; D002772:Cholera Toxin / Q000494:pharmacology; D004797:Enzyme-Linked Immunosorbent Assay; D000939:Epitopes; D018928:Immunity, Mucosal; D007114:Immunization; D007071:Immunoglobulin A, Secretory / Q000032:analysis; D051379:Mice; D011135:Polysaccharides, Bacterial / Q000276:immunology; D022541:Streptococcal Vaccines / Q000008:administration & dosage* / Q000276:immunology*; D013297:Streptococcus pyogenes / Q000276:immunology*
chemical_list: D000942:Antigens, Bacterial; D001425:Bacterial Outer Membrane Proteins; D002352:Carrier Proteins; D000939:Epitopes; D007071:Immunoglobulin A, Secretory; D011135:Polysaccharides, Bacterial; D022541:Streptococcal Vaccines; C014689:streptococcal M protein; D002772:Cholera Toxin