Facile Preparation of Polysaccharide-Polypeptide Conjugates via a Biphasic Solution Ring-Opening Polymerization

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Surface Chemistry

Background:

• Polysaccharide-polypeptide conjugates are of significant interest for mimicking natural biomolecules like peptidoglycans and proteoglycans.
• Current methods for synthesizing these conjugates face challenges due to solubility issues between polysaccharides and N-carboxyanhydrides (NCAs), leading to poor control over polypeptide chain length and side reactions.

Purpose of the Study:

• To develop a facile and efficient strategy for preparing polysaccharide-polypeptide conjugates with well-controlled polypeptide chain lengths.
• To investigate the impact of controlled polypeptide chain length on the antibacterial and antibiofilm properties of the conjugates.

Main Methods:

• A biphasic solution ring-opening polymerization technique was employed, utilizing unmodified polysaccharides as initiators.
• The polymerization allowed for direct conjugation and control over the polypeptide chain length (lp).
• The antibacterial and antibiofilm properties of the resulting conjugates were evaluated.

Main Results:

• A novel, efficient strategy for synthesizing polysaccharide-polypeptide conjugates with controlled polypeptide chain lengths was successfully established.
• The study demonstrated that increasing the polypeptide chain length (lp) significantly enhanced the antibiofilm efficacy of the conjugate coatings.
• The biphasic polymerization approach minimized side reactions and improved control over conjugate structure.

Conclusions:

• The developed method offers a promising approach for the precise synthesis of polysaccharide-polypeptide conjugates.
• Controlled elongation of polypeptide chains is a key factor in potentiating the antibiofilm activity of these conjugates.
• This work opens avenues for creating diverse polypeptide-based conjugates with tailored structures for various biomedical applications.