ROMP-based Glycopolymers with High Affinity for Mannose-Binding Lectins

Well-defined, highly reactive poly­(norbornenyl azlactone)­s of controlled length (number-average degree of polymerization D P n ̅ = 10 to 1,000) were made by ring-opening metathesis polymerization (ROMP) of pure exo-norbornenyl azlactone. These were converted into glycopolymers using a facile postp...

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Veröffentlicht in:Biomacromolecules 2023-08, Vol.24 (8), p.3689-3699
Hauptverfasser: Gonnot, Clément, Scalabrini, Mathieu, Roubinet, Benoit, Ziane, Célia, Boeda, Fabien, Deniaud, David, Landemarre, Ludovic, Gouin, Sébastien G., Fontaine, Laurent, Montembault, Véronique
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Sprache:eng
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Zusammenfassung:Well-defined, highly reactive poly­(norbornenyl azlactone)­s of controlled length (number-average degree of polymerization D P n ̅ = 10 to 1,000) were made by ring-opening metathesis polymerization (ROMP) of pure exo-norbornenyl azlactone. These were converted into glycopolymers using a facile postpolymerization modification (PPM) strategy based on click aminolysis of azlactone side groups by amino-functionalized glycosides. Pegylated mannoside, heptyl-mannoside, and pegylated glucoside were used in the PPM. Binding inhibition of the resulting glycopolymers was evaluated against a lectin panel (Bc2L-A, FimH, langerin, DC-SIGN, ConA). Inhibition profiles depended on the sugars and the degrees of polymerization. Glycopolymers from pegylated-mannoside-functionalized polynorbornene, with D P n ̅ = 100, showed strong binding inhibition, with subnanomolar range inhibitory concentrations (IC50s). Polymers surpassed the inhibitory potential of their monovalent analogues by four to five orders of magnitude thanks to a multivalent (synergistic) effect. Sugar-functionalized poly­(norbornenyl azlactone)­s are therefore promising tools to study multivalent carbohydrate–lectin interactions and for applications against lectin-promoted bacterial/viral binding to host cells.
ISSN:1525-7797
1526-4602
DOI:10.1021/acs.biomac.3c00406