Flexible Sono-Piezo Patch for Functional Sweat Gland Repair through Endogenous Microenvironmental Remodeling

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Tissue Engineering

Background:

• Scarless functional tissue regeneration, particularly skin appendages like sweat glands, is critical for burn patients.
• Current treatments often use exogenous materials, but remodeling the endogenous regenerative microenvironment remains a significant challenge.

Purpose of the Study:

• To develop a flexible sono-piezo patch (fSPP) for creating an endogenous regenerative microenvironment.
• To promote sweat gland repair in burn wounds using physical stimulation.

Main Methods:

• Fabrication of a flexible sono-piezo patch (fSPP) with piezoelectric nanoparticles.
• Application of low-intensity pulsed ultrasound (LIPUS) to activate electrical stimulation.
• Evaluation of the fSPP's effect on peripheral nerves, fibroblasts, vasculatures, and sweat gland regeneration in burn models.

Main Results:

• The fSPP successfully created an endogenous regenerative microenvironment.
• Electrical stimulation enhanced pro-regenerative behaviors of niche tissues and cells.
• Effective wound healing and regeneration of functional sweat glands were achieved solely through physical stimulation.

Conclusions:

• The developed fSPP offers a noninvasive, drug-free therapeutic strategy for burn injuries.
• This approach shows significant potential for promoting functional skin appendage regeneration.
• The study highlights the efficacy of physical stimulation in remodeling the regenerative microenvironment for improved wound healing.