Photosensitive controlled release with polyethylene glycol-anthracene modified alginate.

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Drug Delivery Systems

Background:

• Alginate is a widely used biomaterial for drug delivery.
• Developing stable and controllable release systems remains a challenge.
• Photosensitive crosslinkers offer tunable control over material properties.

Purpose of the Study:

• To covalently modify alginate with polyethylene glycol-conjugated anthracene.
• To investigate the potential of these modifications as photosensitive crosslinkers.
• To evaluate the impact on drug release kinetics and material stability.

Main Methods:

• Covalent conjugation of polyethylene glycol-anthracene to alginate.
• Fabrication of alginate photogels and calcium alginate gels.
• Coomassie Blue release studies under UV light irradiation.
• Analysis of crosslinking densities and interactions.

Main Results:

• Alginate photogels demonstrated extended release times (>70 days) for Coomassie Blue.
• UV light treatment significantly reduced drug release, indicating effective photocrosslinking.
• Modified alginate exhibited enhanced photosensitivity and controlled release profiles.
• Strong interactions were observed between the drug and both alginate and anthracene.

Conclusions:

• Covalent modification of alginate with photoactive crosslinkers creates a stable, photosensitive system.
• This approach enables long-term, controlled release of drug compounds.
• The developed photogels show promise for advanced drug delivery applications.