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Human Ex vivo Wound Model and Whole-Mount Staining Approach to Accurately Evaluate Skin Repair
Published on: February 17, 2021
Understanding exosomes in diabetic wound healing
Paras Ahmad1, Yulan Wang2, Yufeng Zhang2
1Department of Research, Advanced PRF Education, Jupiter, Florida, USA.
Background:
Diabetic wounds signify a major complication of diabetes mellitus, characterized by chronic inflammation, compromised angiogenesis, and high risk of infection, amputation, and mortality. Contemporary therapies remain limited in efficacy and durability. This review aimed to comprehensively assess exosome-mediated interventions as a cell-free regenerative approach for diabetic wound healing.
Methods:
This narrative-scoping review was conducted using PubMed, Scopus, Web of Science, EMBASE, and Cochrane databases, identifying 176 preclinical and clinical studies. Included studies evaluated exosome origins, mechanisms of action, delivery platforms, and treatment outcomes in diabetic wound healing.
Results:
Exosomes derived from mesenchymal stem cells, progenitor cells, blood products, immune cells, and natural sources consistently improved wound healing by enhancing angiogenesis, re-epithelialization, fibroblast proliferation, and extracellular matrix remodeling, while decreasing oxidative stress and chronic inflammation. Mechanistically, these effects were regulated via the stimulation of the PI3K/AKT, ERK/MAPK, STAT3, HIF-1α/VEGF, and Nrf2 signaling, together with the suppression of the AGE/RAGE-regulated ferroptosis and apoptosis. Biomaterial-based delivery systems, including scaffolds, microneedle patches, and hydrogels, significantly enhanced exosome retention, stability, and treatment efficacy. Across studies, exosome treatments showed expedited wound closure, enhanced collagen deposition, and improved vascularization in diabetic models.
Conclusion:
Exosome-mediated therapies represent a promising and multifaceted regenerative strategy for diabetic wound healing, addressing pivotal pathophysiological deficits. Nevertheless, challenges associated with standardization, scalability, and clinical validation must be resolved before widespread clinical application.
Insights
Exosome therapy shows promise for healing diabetic wounds by improving blood vessel growth and reducing inflammation. Further research is needed to standardize treatments for clinical use.
Area of Science:
- Regenerative Medicine
- Biotechnology
- Wound Healing Research
Background:
- Diabetic wounds are a severe complication of diabetes, marked by inflammation and poor healing.
- Current treatments for diabetic wounds lack efficacy and long-term benefits.
- Exosome-mediated interventions offer a cell-free regenerative approach for diabetic wound healing.
Purpose of the Study:
- To review exosome-mediated interventions for diabetic wound healing.
- To assess exosome origins, mechanisms, delivery, and outcomes.
- To evaluate exosomes as a regenerative strategy for diabetic wounds.
Main Methods:
- Conducted a narrative-scoping review of 176 studies from major databases.
- Included preclinical and clinical studies on diabetic wound healing.
- Evaluated exosome sources, delivery systems, and therapeutic effects.
Main Results:
- Exosomes from various sources enhanced angiogenesis, re-epithelialization, and fibroblast proliferation.
- Exosomes reduced oxidative stress, inflammation, ferroptosis, and apoptosis via specific signaling pathways.
- Biomaterial delivery systems improved exosome efficacy, leading to faster wound closure and better vascularization.
Conclusions:
- Exosome therapies are a promising regenerative strategy for diabetic wound healing.
- Exosomes address key pathological issues in diabetic wounds.
- Standardization, scalability, and clinical validation are necessary for widespread application.
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