Functional extracellular matrix hydrogel modified with MSC-derived small extracellular vesicles for chronic wound...

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Wound Healing

Background:

• Diabetic wound healing presents significant clinical challenges.
• Current medical dressings often fail to meet the complex needs of diabetic wound care.
• There is a critical need for advanced wound healing strategies.

Purpose of the Study:

• To fabricate a functional hydrogel wound dressing for diabetic wounds.
• To incorporate small extracellular vesicles (sEVs) for enhanced therapeutic effects.
• To promote skin regeneration and functional restoration in diabetic wound models.

Main Methods:

• Synthesized a hydrogel from porcine small intestinal submucosa.
• Bound sEVs to the hydrogel using peptides for sustained release (SC-Ps-sEVs).
• Evaluated biocompatibility, cell proliferation, migration, adhesion, and angiogenesis in vitro, and assessed wound healing in a diabetic rat model.

Main Results:

• Successfully fabricated a hydrogel wound dressing with robust mechanical properties.
• Demonstrated excellent biocompatibility and superior angiogenesis stimulation.
• Achieved effective full-thickness skin wound healing in a diabetic rat model.

Conclusions:

• Developed a novel hydrogel (SIS) with exceptional mechanical and biological properties.
• The functional hydrogel dressing shows significant potential for promoting diabetic wound healing.
• This technology may be applicable to treating wounds in various epithelial tissues.