Adipose-Derived Stem-Cell-Derived Exosomes Encapsulated Patch for Modulating Inflammation and Promoting Tissue...

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Tissue Engineering

Background:

• Chronic wound repair remains a significant clinical challenge, with traditional methods showing limitations in recovery speed and biocompatibility.
• Adipose-derived stem cell exosomes (ADSC-exo) show promise for tissue regeneration due to anti-inflammatory and immunomodulatory properties, but direct stem cell injection has low survival rates.
• Developing effective delivery systems for ADSC-exo is crucial for maximizing their therapeutic potential in tissue repair.

Purpose of the Study:

• To develop and evaluate a novel Janus G-Avs patch for enhanced tissue regeneration and prevention of postoperative adhesions.
• To investigate the capability of the G-Avs patch to deliver ADSC-exo in a controlled manner.
• To assess the in vivo efficacy of the G-Avs patch in promoting tissue repair and modulating the inflammatory response.

Main Methods:

• Fabrication of a Janus patch using coaxial electrospinning, with a top layer for ADSC-exo delivery (GelMA/ADSC-exo/HA) and a bottom layer for mechanical support and anti-adhesion (4aPLGA-Glu/PCL).
• In vivo testing in rat models to evaluate the patch's effects on cell proliferation, angiogenesis, and macrophage polarization.
• Transcriptomic analysis to elucidate the molecular mechanisms underlying the patch's regenerative effects, focusing on metabolic and immune pathways.

Main Results:

• The G-Avs patch successfully delivered ADSC-exo, prolonging release and preventing postoperative tissue adhesion.
• In vivo studies showed enhanced cell proliferation, promoted angiogenesis, and M2 macrophage polarization, indicating reduced inflammation and improved tissue repair.
• Transcriptomic data revealed that the G-Avs patch upregulates metabolic pathways and downregulates immune-inflammatory pathways, supporting tissue regeneration.

Conclusions:

• The Janus G-Avs patch is an effective dual-functional material for promoting tissue repair and preventing adhesions.
• The patch's ability to deliver ADSC-exo and modulate the cellular microenvironment offers a promising therapeutic strategy for chronic wounds.
• The G-Avs patch demonstrates significant clinical potential for advancing regenerative medicine and wound healing applications.