Multi-Arm Star-Shaped Glycopolymers with Precisely Controlled Core Size and Arm Length

Area of Science:

• Polymer Chemistry
• Carbohydrate Chemistry
• Biomaterials Science

Background:

• Star-shaped glycopolymers exhibit potent lectin-binding activities, crucial for biological applications.
• Existing synthesis methods for multi-arm glycopolymers are often complex and not amenable to one-pot procedures.

Purpose of the Study:

• To establish a facile, one-pot synthesis for well-defined, multi-arm glycopolymers.
• To investigate the tunable properties and lectin-binding capabilities of these novel glycopolymers.
• To explore their potential in drug encapsulation.

Main Methods:

• Cu(0)-mediated reversible deactivation radical polymerization in aqueous media.
• Homo- and copolymerization of d-mannose acrylamide with NIPAM for linear arms.
• Core cross-linking with bisacrylamide to form star architectures.
• Surface plasmon resonance spectroscopy for lectin binding analysis.
• Drug encapsulation studies below and above the lower critical solution temperature (LCST).

Main Results:

• Successful rapid, one-pot synthesis of well-defined multi-arm glycopolymers.
• Tunable arm length and core size achieved by controlling polymerization parameters.
• Demonstrated high binding activity with mannose-specific lectins (DC-SIGN, MBL).
• Investigated stability and degradation under varying pH conditions.
• Confirmed encapsulation of DHA and Saquinavir, influenced by the polymer's LCST.

Conclusions:

• The developed method offers a straightforward approach to synthesizing tunable, star-shaped glycopolymers.
• These glycopolymers show significant potential for lectin-targeted applications and drug delivery systems.
• The study highlights the versatility of these materials in biomolecular interactions and controlled release.