title: Induction of a mucosal immune response to the streptococcal M protein by intramuscular administration of a PADRE-ASREAK peptide.
abstract: In a previous study, it was shown that an intramuscular administration of amino acid PADRE-ELDKWA sequence induced a mucosal immune response to a conserved epitope of human immunodeficiency virus in mice. In the same model, here it is shown that this method can be used with a selected peptide from the M protein of group A streptococci. The PADRE-ASREAK sequence was injected in mice by the intramuscular route. Antibodies against M protein were detected in extracts of mucosal tissues and in serum. The repertoire isotypes of serum immunoglobulin G (IgG) and mucosal IgA and IgG antibodies varied, according to the dose of injected peptide. The highest mucosal IgA antibody response was obtained with 0.01 micro g of antigen per injection, whereas the systemic IgG antibody response increased with 10 micro g of antigen. Mucosal antibody production against streptococci was confirmed by immunofluorescence analysis. These results provide evidence that this novel approach of mucosal vaccination may be of advantage for bacterial systems and suggest a new field of investigation based on synthetic peptide analogues.
authors.affiliation: Silpakorn University, Nakorn-Pathom, Thailand. perayot@email.pharm.su.ac.th
authors.forename: P
authors.initials: P
authors.lastname: Pamonsinlapatham
authors.forename: N
authors.initials: N
authors.lastname: Decroix
authors.forename: L
authors.initials: L
authors.lastname: Mihaila-Amrouche
authors.forename: A
authors.initials: A
authors.lastname: Bouvet
authors.forename: J-P
authors.initials: JP
authors.lastname: Bouvet
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D000906:Antibodies / Q000032:analysis; D000907:Antibodies, Bacterial / Q000276:immunology; D000942:Antigens, Bacterial; D001425:Bacterial Outer Membrane Proteins / Q000276:immunology*; D001428:Bacterial Vaccines; D002352:Carrier Proteins / Q000276:immunology*; D004797:Enzyme-Linked Immunosorbent Assay; D018985:Epitopes, B-Lymphocyte / Q000276:immunology; D018984:Epitopes, T-Lymphocyte / Q000276:immunology; D005260:Female; D005455:Fluorescent Antibody Technique; D007273:Injections, Intramuscular; D017780:Malaria Vaccines / Q000276:immunology*; D051379:Mice; D008807:Mice, Inbred BALB C; D018613:Microscopy, Confocal; D008969:Molecular Sequence Data; D009092:Mucous Membrane / Q000276:immunology*; D013297:Streptococcus pyogenes / Q000276:immunology*
chemical_list: D000906:Antibodies; D000907:Antibodies, Bacterial; D000942:Antigens, Bacterial; D001425:Bacterial Outer Membrane Proteins; D001428:Bacterial Vaccines; D002352:Carrier Proteins; D018985:Epitopes, B-Lymphocyte; D018984:Epitopes, T-Lymphocyte; D017780:Malaria Vaccines; C401223:PADRE 45; C014689:streptococcal M protein