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Polysaccharides such as glycogen and starch are synthesized from nucleoside diphosphate sugars, primarily uridine diphosphate glucose (UDPG) and adenosine diphosphate glucose (ADPG). These activated glucose donors act as key intermediates in carbohydrate metabolism and biosynthesis. UDPG primarily involves glycogen synthesis in animals and many bacteria, while ADPG plays a fundamental role in starch synthesis in plants and certain bacteria.UDPG is formed when glucose-1-phosphate reacts with...
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A Dual-Dynamic Crosslinked Polysaccharide-Based Hydrogel Loaded with Exosomes for Promoting Diabetic Wound Healing.

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  • 1School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China.

Materials (Basel, Switzerland)
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This study developed a novel hydrogel wound dressing (CPOA@Exos) that significantly accelerates diabetic wound healing by reducing inflammation and promoting tissue repair. The advanced material effectively delivers therapeutic exosomes to the wound site.

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diabetic woundexosomeshydrogelreactive oxygen species (ROS)

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Wound Healing Research

Background:

  • Diabetic wounds exhibit severe inflammation, hindering vascular growth and repair.
  • Effective management of diabetic wounds is crucial for patient outcomes.

Purpose of the Study:

  • To develop a novel dual-dynamic covalent hydrogel incorporating mesenchymal stem cells' exosomes (Exos) for enhanced diabetic wound healing.
  • To investigate the anti-inflammatory and pro-regenerative properties of the CPOA@Exos hydrogel in a diabetic wound model.

Main Methods:

  • Grafting carboxymethyl chitosan (CMCS) with 4-formylphenylboronic acid (FPBA) and crosslinking with oxidized sodium alginate (OAlg) to create a CPOA hydrogel.
  • Incorporating exosomes (Exos) into the CPOA hydrogel to form CPOA@Exos.
  • Establishing a diabetic wound model in C57 mice for in vivo evaluation.

Main Results:

  • The CPOA hydrogel exhibited injectability, self-healing, and reactive oxygen species (ROS) responsiveness.
  • CPOA@Exos treatment promoted M2 macrophage polarization and enhanced cellular proliferation in diabetic wounds.
  • Accelerated healing of diabetic wounds was observed with the CPOA@Exos hydrogel dressing.

Conclusions:

  • The developed CPOA@Exos hydrogel dressing is effective in inhibiting inflammation and promoting diabetic wound healing.
  • This dual-dynamic covalent hydrogel represents a promising therapeutic strategy for managing complex diabetic wounds.