# A Purified Platelet-Derived Exosome Product for Chronic Wound Healing: A Novel Therapeutic Strategy and Next-Generation Delivery Platform

## TL;DR

A purified platelet-derived exosome product (PEP) is explored as a new treatment for chronic wounds, offering improved healing and potential as a drug delivery platform.

## Contribution

The paper introduces PEP as a next-generation exosome formulation with high purity and potential for localized wound healing.

## Key findings

- Fibrin-based PEP delivery achieved complete wound closure and functional skin regeneration in animal models.
- Collagen and hyaluronic acid-based PEP systems show promise for injectable and dermatologic applications.
- PEP may serve as a nanocarrier for other drugs, expanding its therapeutic potential.

## Abstract

Chronic wounds remain a major unmet clinical challenge, often failing to progress to normal healing due to persistent inflammation, impaired angiogenesis, and cellular senescence. Exosomes have recently been investigated as promising acellular therapeutics capable of restoring intercellular communication and promoting tissue regeneration. Among these, the Purified Exosome Product (PEP) represents a next-generation, platelet-derived exosome formulation manufactured under Good Manufacturing Practice (GMP) conditions with high purity, stability, and reproducibility. This review summarizes the current advances in exosome-based chronic wound therapeutics and PEP delivery systems and their translational potentials. Incorporation of PEP into bioengineered carriers such as fibrin sealant, collagen scaffolds, and hyaluronic acid (HA) hydrogels enables localized and sustained exosome release, significantly prolonging therapeutic effects and improving regenerative outcomes. Fibrin-based PEP delivery achieved complete wound closure and functional skin regeneration in animal models, while collagen and HA-based systems showed promising results for injectable and dermatologic applications. Beyond its intrinsic healing effects, PEP may also serve as a nanocarrier for other drugs, offering a future direction in chronic wound management.