Synthesis of antifungal vaccines by conjugation of β-1,2 trimannosides with T-cell peptides and covalent anchoring of neoglycopeptide to tetanus toxoid
作者:Jonathan Cartmell、Eugenia Paszkiewicz、Sebastian Dziadek、Pui-Hang Tam、Thanh Luu、Susmita Sarkar、Tomasz Lipinski、David R. Bundle
DOI:10.1016/j.carres.2014.06.024
日期:2015.2
Selective strategies for the construction of novel three component glycoconjugate vaccines presenting Candida albicans cell wall glycan (beta-1,2 mannoside) and polypeptide fragments on a tetanus toxoid carrier are described. The first of two conjugation strategies employed peptides bearing an N-terminal thiopropionyl residue for conjugation to a trisaccharide equipped with an acrylate linker and a C- terminal S-acetyl thioglycolyl moiety for subsequent linking of neoglycopeptide to bromoacetylated tetanus toxoid. Michael addition of acrylate trisaccharides to peptide thiol under mildly basic conditions gave a mixture of N- and C-terminal glyco-peptide thioethers. An adaptation of this strategy coordinated S-acyl protection with anticipated thioester exchange equilibria. This furnished a single chemically defined fully synthetic neoglycopeptide conjugate that could be anchored to a tetanus toxoid carrier and avoids the introduction of exogenous antigenic groups. The second strategy retained the N-terminal thiopropionyl residue but replaced the C-terminal S-acetate functionality with an azido group that allowed efficient, selective formation of neoglycopeptide thioethers and subsequent conjugation of these with propargylated tetanus toxoid, but introduced potentially antigenic triazole linkages. (C) 2014 Elsevier Ltd. All rights reserved.
A Novel Linker Methodology for the Synthesis of Tailored Conjugate Vaccines Composed of Complex Carbohydrate Antigens and Specific T<sub>H</sub>‐Cell Peptide Epitopes
作者:Sebastian Dziadek、Sandra Jacques、David R. Bundle
DOI:10.1002/chem.200800065
日期:2008.6.27
protein (hsp60). Moreover, the linkage chemistry has proven well suited for the synthesis of more complex target structures such as a biotinylated glycopeptide, a three component vaccine containing an immunostimulatory peptide epitope from interleukin-1 beta (IL-1 beta), and for the conjugation of complex carbohydrates to carrier proteins such as bovineserumalbumin.