Umbilical Cord Mesenchymal Stromal Cell-Derived Small Extracellular Vesicles Modulate Skin Matrix Synthesis and...

Area of Science:

• Biomedical Engineering
• Dermatology
• Regenerative Medicine

Background:

• Mesenchymal stromal cell-derived extracellular vesicles (MSC-sEVs) show promise in skin applications.
• Limited research exists on umbilical cord-derived MSC-sEVs (UC-MSC-sEVs) for scar reduction and hyperpigmentation.
• Understanding UC-MSC-sEVs' effects on skin extracellular matrix (ECM) and pigmentation is crucial.

Purpose of the Study:

• To evaluate the impact of UC-MSC-sEVs on skin ECM synthesis.
• To assess the effects of UC-MSC-sEVs on pigmentation.
• To investigate UC-MSC-sEVs' potential in scar reduction and skin lightening.

Main Methods:

• In vitro studies using human dermal fibroblasts (HDF) and melanoma cells (MNT-1).
• Assessed HDF proliferation, migration, antioxidant activity, and ECM gene expression.
• Examined MNT-1 proliferation, melanin content, and tyrosinase activity.
• Ex vivo skin models were used to evaluate UC-MSC-sEVs' skin permeation.

Main Results:

• UC-MSC-sEVs increased HDF proliferation and upregulated fibronectin, MMP-1, and MMP-3 gene expression.
• No significant changes were observed in HDF migration, collagen type 1/3, or SOD expression.
• UC-MSC-sEVs reduced melanin synthesis in MNT-1 cells without affecting tyrosinase activity.
• Topical application showed UC-MSC-sEVs remained in the stratum corneum after 18 hours, indicating poor skin penetration.

Conclusions:

• UC-MSC-sEVs show potential for stimulating fibroblast proliferation and regulating ECM synthesis.
• UC-MSC-sEVs can reduce melanin production, suggesting applications in skin lightening.
• Poor skin penetration limits the topical efficacy of UC-MSC-sEVs for scar reduction and pigmentation treatment.