Peptide Modified Electrospun Glycopolymer Fibers

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Surface Engineering

Background:

• Developing advanced biomaterials requires precise control over surface chemistry.
• Glycopolymers offer a versatile platform for creating functional materials.
• Peptide grafting can impart specific biological functionalities to polymer scaffolds.

Purpose of the Study:

• To develop a method for grafting N-terminus alkene-functionalized oligopeptides onto thiol-functionalized glycopolymer fiber mats.
• To investigate the efficiency and characteristics of peptide grafting using thiol-ene click chemistry.
• To explore the potential for precise engineering of polyLSL fiber mat surfaces for tailored properties.

Main Methods:

• Synthesis of an N-terminus 4-pentenoyl modified oligopeptide (oligo(Glu70-co-Leu30)).
• Fabrication of polyLSL[6'Ac,6"Ac] glycopolymer fiber mats via electrospinning.
• Surface functionalization of fiber mats with thiols through oxidation and reaction with cysteamine.
• Peptide grafting onto thiol-functionalized mats using thiol-ene click reaction.
• Characterization of peptide grafting using X-ray photoelectron spectroscopy (XPS).

Main Results:

• Successful fabrication of polyLSL fiber mats with preserved morphology after thiol functionalization.
• Efficient grafting of alkene-modified oligopeptides to thiol-functionalized polyLSL mats via thiol-ene click reaction.
• XPS analysis indicated approximately 50 mol% of surface repeat units were decorated with peptide moieties.
• Approximately one-third of the grafted peptide units were physically adsorbed onto the polyLSL surface.

Conclusions:

• The study demonstrates a robust method for precise surface engineering of glycopolymer fiber mats.
• Thiol-ene click chemistry enables efficient and controlled grafting of peptides onto polyLSL scaffolds.
• This approach allows for tailoring surface chemistry and biological properties of biomaterials for diverse applications.