Caffeic Acid and Cyclen-Based Hydrogel for Synergistic Antibacterial Therapy

Area of Science:

• Biomaterials Science
• Drug Delivery Systems
• Wound Healing Research

Background:

• Caffeic acid, a natural product, shows antimicrobial potential but suffers from poor solubility and bioavailability.
• Existing strategies like derivatization and nanoformulation aim to improve caffeic acid's therapeutic efficacy.
• Chronic infections require advanced delivery systems for effective treatment.

Purpose of the Study:

• To develop a novel supramolecular prodrug hydrogel (GB-CA/Cy-Zn(II)) for enhanced wound healing.
• To investigate the synergistic antibacterial and anti-inflammatory effects of caffeic acid and cyclen-Zn(II) in a hydrogel matrix.
• To evaluate the hydrogel's physicochemical properties, efficacy in suppressing inflammation and infection, and biosafety for wound treatment.

Main Methods:

• Fabrication of a mixed supramolecular prodrug hydrogel (GB-CA/Cy-Zn(II)) using a phenylborate linker.
• Characterization of the hydrogel's properties using NMR, CD, TEM, and rheological assays.
• In vitro assessment of antibacterial activity and inflammatory cytokine suppression, and in vivo evaluation in an infected wound model.

Main Results:

• The GB-CA/Cy-Zn(II) hydrogel was successfully prepared and characterized.
• In vitro studies confirmed significant suppression of inflammation and bacterial infection.
• In vivo experiments demonstrated rapid wound healing capacity and excellent biosafety of the hydrogel.

Conclusions:

• A simple method for preparing a caffeic acid-based hydrogel carrier was established.
• The GB-CA/Cy-Zn(II) hydrogel exhibits synergistic therapeutic effects for inflammation and bacterial infections.
• This hydrogel shows promise as an effective and safe treatment for infected wounds.