Synthesis of Mannosylated Glycodendrimers and Evaluation against BC2L-A Lectin fromBurkholderia Cenocepacia

Carlo Pifferi (1) , David Goyard (1) , Emilie Gillon (2) , Anne Imberty (2) , Olivier Renaudet (3)

1 DCM - Département de Chimie Moléculaire
2 CERMAV - Centre de Recherches sur les Macromolécules Végétales
3 DCM - I2BM - Département de Chimie Moléculaire - Ingéniérie et Intéractions BioMoléculaires

Chronic colonization of lungs by opportunist bacteria is the major cause of mortality for cystic fibrosis patients. Among these pathogens, Burkholderia cenocepacia is responsible for cepacia syndrome, a deadly exacerbation of infection that is the main cause of poor outcomes of lung transplantation. This bacterium contains three soluble carbohydrate‐binding proteins, including the B. cenocepacia lectin A (BC2L‐A), which is proposed to bind to oligomannose‐type N‐glycan structures to adhere to host tissues. In this work, several mannosylated glycoclusters and glycodendrimers with valencies ranging from four to 24 were prepared and their interactions with BC2L‐A were thermodynamically characterized by isothermal titration calorimetry. The results show that a 24‐valent structure binds to BC2L‐A at nanomolar concentration, which makes this compound the highest affinity monodisperse ligand for this lectin.

Domaines: Chimie organique

Carlo Pifferi, David Goyard, Emilie Gillon, Anne Imberty, Olivier Renaudet. Synthesis of Mannosylated Glycodendrimers and Evaluation against BC2L-A Lectin fromBurkholderia Cenocepacia. ChemPlusChem, 2016, 82 (3), pp.390 - 398. ⟨10.1002/cplu.201600569⟩. ⟨hal-03323878⟩