Progress toward developing a carbohydrate-conjugate vaccine against Clostridium difficile ribotype 027: synthesis of the cell-surface polysaccharide PS-I repeating unit
Progress toward developing a carbohydrate-conjugate vaccine against Clostridium difficile ribotype 027: synthesis of the cell-surface polysaccharide PS-I repeating unit
Oligosaccharides and oligosaccharides-protein conjugates derived from clostridium difficile polysaccharide PS-I, methods of synthesis and uses thereof, in particular as vaccines and diagnostic tools
申请人:Max-Planck-Gesellschaft zur Förderung der
Wissenschaften e.V.
公开号:EP2554549A1
公开(公告)日:2013-02-06
The invention relates to a synthetic oligosaccharide representing part of the repeating unit of the Clostridium difficile glycopolymer PS-I and having the sequence of the pentasaccharide α-L-Rhap-(1→3)-β-D-Glcp-(1→4)-[α-L-Rhap-(1→3)]-α-D-Glcp-(1→2)-α-D-Glcp or a synthetic fragment or derivative thereof.
Preferably, the claimed synthetic oligosaccharide bears at least one linker L for conjugation to a carrier protein or for immobilization on a surface.
Further aspects of the invention relate to advantageous methods for synthesizing said synthetic oligosaccharide and oligosaccharide-protein conjugate as well as to uses thereof, in particular as vaccines and diagnostic tools.
A preferred method for synthesizing the pentasaccharide is shown below.