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Synthesis of propargyl glycosides of Streptococcus pneumoniae serotypes 6A and 6B for glycoconjugate vaccines.

Tianyao MengBrady JamesJared HaymoreRui WangShawn GublerSeth A TaylorM G FinnLuc TeytonShenglou DengPaul B Savage
Published in: Tetrahedron (2024)
We developed a method for making immune responses to bacterial glycans T cell-dependent, which involves attachment of short, synthetic glycans to a virus-like nanoparticle (VLP). This strategy enhances immune responses to glycans by facilitating cognate T cell help of B cells, leading to antibody class switching and affinity maturation yielding high-affinity, anti-glycan antibodies. This method requires synthesis of bacterial glycans as propargyl glycosides for covalent attachment to VLPs, and the resulting short linker between the VLP and glycan is important for optimal T cell receptor recognition. In this work, glycans that are part of the capsular polysaccharides (CPS) produced by Streptococcus pneumoniae serotypes Sp6A and Sp6B were synthesized as disaccharides and trisaccharides. The optimal glycan epitope for antibody binding to the CPS from these serotypes is unknown, and differing "frames" of disaccharides and trisaccharides were prepared to elucidate the optimal antigen for antibody binding.
Keyphrases
  • cell surface
  • immune response
  • toll like receptor
  • dendritic cells
  • binding protein
  • inflammatory response
  • mass spectrometry
  • iron oxide
  • oxide nanoparticles