Platelet Extracellular Vesicles Loaded Gelatine Hydrogels for Wound Care - Institut d'électronique, de microélectronique et de nanotechnologie
Article Dans Une Revue Advanced Healthcare Materials Année : 2024

Platelet Extracellular Vesicles Loaded Gelatine Hydrogels for Wound Care

Résumé

Platelet extracellular vesicles (pEVs) isolated from clinical-grade human platelet concentrates are attracting attention as a promising agent for wound healing therapies. Although pEVs have shown potential for skin regeneration, their incorporation into wound bandages has remained limitedly explored. Herein, gelatine-based hydrogel (PAH-G) foams for pEVs loading and release are formulated by crosslinking gelatine with poly(allylamine) hydrochloride (PAH) in the presence of glutaraldehyde and sodium bicarbonate. The optimized PAH-G hydrogel foam, PAH 0.24 G 37 , displayed an elastic modulus G' = 8.5 kPa at 37 °C and retained a rubbery state at elevated temperatures. The excellent swelling properties of PAH 0.24 G 37 allowed to easily absorb pEVs at high concentration (1 × 10 11 particles mL -1 ). The therapeutic effect of pEVs was evaluated in vivo on a chronic wound rat model. These studies demonstrated full wound closure after 14 days upon treatment with PAH 0.24 G 37 @pEVs. The maintenance of a reduced-inflammatory environment from the onset of treatment promoted a quicker transition to skin remodeling. Promotion of follicle activation and angiogenesis as well as M1-M2 macrophage modulation are evidenced. Altogether, the multifunctional properties of PAH 0.24 G 37 @pEVs addressed the complex challenges associated with chronic diabetic wounds, representing a significant advance toward personalized treatment regimens for these conditions.
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hal-04767069 , version 1 (05-11-2024)

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Florence Back, Alexandre Barras, Ariunjargal Nyam‐erdene, Jen‐chang Yang, Sorin Melinte, et al.. Platelet Extracellular Vesicles Loaded Gelatine Hydrogels for Wound Care. Advanced Healthcare Materials, 2024, ⟨10.1002/adhm.202401914⟩. ⟨hal-04767069⟩
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