Study summary · research use only
Skin-adaptive film dressing with smart-release of growth factors accelerated diabetic wound healing
Plain-language summary
Paraphrased from the published abstract below — not a verdict on whether anything works.
In this diabetic mouse study, researchers designed a three-layered skin-adaptive film dressing (AGB) made of phenylboronic acid-grafted γ-PGA and polyvinyl alcohol, measuring 479 μm thick with an adhesive force of 1267 ± 330 mN, encapsulating the anti-inflammatory tripeptide KPV in the bottom layer and epidermal growth factor (EGF) in the middle-top layers. KPV was released within 3 day and EGF was released subsequently in a glucose-responsive manner. The combined KPV-and-EGF film (K-E-AGB) was associated with a significantly improved repair rate of full-thickness skin wounds in diabetic mice, with the mechanism linked to inflammatory inhibition, angiogenesis, and collagen deposition. The authors describe the skin-adaptive film as a candidate dressing for delivering biologic factors to chronic wounds.
Abstract
The general treatment of diabetic wound was use of wound dressings to absorb excess exudate. However, traditional wound dressings neither mimic the skin-like properties nor easily be withdrawn from the wound. Herein, the skin-adaptive three-layered films (AGB) dressing has been designed by alternatively depositing phenylboronic acid-grafted γ-PGA (PBA-PGA) and polyvinyl alcohol (PVA). The thickness of AGB film was only 479 μm and its flexibility was obviously strengthen by the boronic ester cross-linking. Besides, the dry AGB film was conveniently adhered to the fresh wound, where its adhesive force reached to 1267 ± 330 mN. Moreover, the adhered AGB film was easily peeled without any second damage after hydration. An anti-inflammatory tripeptide (KPV) and epidermal growth factor (EGF) as biologic factors were respectively encapsulated in the bottom layer and the middle-top two layers of AGB film. KPV was firstly released within 3 day and EGF was subsequently released in a glucose-responsive manner. AGB film containing KPV and EGF (K-E-AGB) could significantly improve the repair rate of full-thickness skin wound on diabetic mice. The mechanism of wound healing was associated with inflammatory inhibition, angiogenesis and collagen deposition. Collectively, skin-adaptive film may be a promising dressing as delivery of biologic factors for the chronic wound.
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