| Autor: |
Madge HYR; School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia. r.stephenson@uq.edu.au., Huang W; School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia. r.stephenson@uq.edu.au., Gilmartin L; School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia. r.stephenson@uq.edu.au., Rigau-Planella B; School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia. r.stephenson@uq.edu.au., Hussein WM; School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia. r.stephenson@uq.edu.au., Khalil ZG; Institute for Molecular Bioscience, The University of Queensland, St Lucia, Queensland 4072, Australia., Koirala P; School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia. r.stephenson@uq.edu.au., Santiago VS; Institute for Molecular Bioscience, The University of Queensland, St Lucia, Queensland 4072, Australia., Capon RJ; Institute for Molecular Bioscience, The University of Queensland, St Lucia, Queensland 4072, Australia., Toth I; School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia. r.stephenson@uq.edu.au.; Institute for Molecular Bioscience, The University of Queensland, St Lucia, Queensland 4072, Australia.; School of Pharmacy, The University of Queensland, Brisbane 4072, Australia., Stephenson RJ; School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane 4072, Australia. r.stephenson@uq.edu.au. |
| Abstrakt: |
Untreated or reoccurring group A Streptococcus (GAS) infection can lead to a number of post-infection complications, including rheumatic heart disease. There is no licenced vaccine for the treatment or prevention of GAS infection. We identified that a cyclic decapeptide plays a significant positive influence on the adjuvant activity of several lipid-antigen mixtures. Here, three synthetic vaccine components were synthesised: (1) J8-PADRE represents the GAS B cell antigen (J8) conjugated to the universal T helper epitope (PADRE); (2) a synthetic toll like receptor 2 (TLR2) ligand based on a C16 alkyl chain lipid moiety; and (3) a cyclic carrier deca-peptide. Previously, through structure-immune activity investigations, it was observed that a physical mixture of these three components had significantly higher IgG immune responses when compared to a fully conjugated vaccine construct. Expanding the scope of this structure-activity investigation, we show that the presence of the cyclic peptide is required for the induction of a strong, balanced Th1/Th2 immune response when compared with lipid and antigen only, and cyclic lipopeptide plus B/T cell antigen physical mixtures. |
