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Generation of Alginate Microspheres for Biomedical Applications
Published on: August 12, 2012
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Multifunctional sodium alginate injectable hydrogel based on intelligent cascade dynamic regulation (ICDR) of ROS
Peipei Xu1, Gang Zhao2, Baijie Cheng1
1College of Chemistry and Chemical Engineering, Donghua University, Shanghai, 201620, PR China.
International Journal of Biological Macromolecules
|November 20, 2025
Summary
This study presents a smart hydrogel wound dressing that uses light to kill drug-resistant bacteria and reduce inflammation. It also monitors healing by detecting hydrogen sulfide (H2S) levels for better wound care.
Area of Science:
- Biomaterials Science
- Wound Healing Research
- Antimicrobial Therapies
Background:
- Hydrogel dressings are vital for managing wound healing, especially with drug-resistant bacteria.
- Current dressings often lack advanced therapeutic and diagnostic capabilities for complex wound environments.
Purpose of the Study:
- To develop a multifunctional injectable hydrogel diagnostic platform (CCAS) for reactive oxygen species (ROS) responsive therapy and inflammation visualization.
- To enhance wound healing by combining photodynamic therapy (PDT) with anti-inflammatory and diagnostic functions.
Main Methods:
- Formulation of a hydrogel using sodium alginate (SA) and a coumarin-based photosensitizer (CCA).
- Evaluation of hydrogel properties, including mechanical strength, water retention, and biocompatibility.
- Assessment of antibacterial efficacy against MRSA and ESBL-E. coli via blue light-induced ROS generation.
- Analysis of anti-inflammatory effects, including ROS scavenging, macrophage polarization, and pro-inflammatory factor reduction.
- Investigation of real-time inflammation monitoring through H2S detection.
Main Results:
- The CCAS hydrogel demonstrated improved mechanical properties and maintained a moist wound environment.
- Photodynamic therapy with CCAS achieved high antibacterial efficiencies (99.94% for MRSA, 98.31% for ESBL-E. coli).
- CCAS promoted M2 macrophage polarization, reduced inflammation, and enhanced wound healing up to 93.60%.
- The platform successfully monitored inflammation in real time via H2S detection.
Conclusions:
- The developed CCAS hydrogel platform offers a dual therapeutic-diagnostic approach for advanced wound management.
- This smart hydrogel system shows significant potential for next-generation wound dressings targeting drug-resistant infections and inflammatory conditions.
