Accelerated Healing of Infected Diabetic Wounds by a Dual-Layered Adhesive Film Cored with Microsphere-Loaded Hydrogel Composite Dressing

Diabetic wounds, a prevalent chronic disease, are associated with older age. The hyperglycemic microenvironment in diabetic wounds significantly reduces the immune system, inducing bacterial invasion. The coupling of tissue repair and antibacterial treatment is critical for infected diabetic ulcer r...

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Bibliographic Details
Published in:ACS applied materials & interfaces 2023-07, Vol.15 (28), p.33207-33222
Main Authors: Qin, Boquan, Wu, Shizhou, Dong, Hongxian, Deng, Shu, Liu, Yunjie, Zhang, Wanli, Feng, Guoying, Lei, Lei, Xie, Huiqi
Format: Article
Language:English
Subjects:
adhesion
angiogenesis
Biological and Medical Applications of Materials and Interfaces
chitosan
chronic diseases
collagen
graphene oxide
hydrogels
immune system
immunomodulation
small intestine
sodium alginate
tissue repair
viability
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Summary:Diabetic wounds, a prevalent chronic disease, are associated with older age. The hyperglycemic microenvironment in diabetic wounds significantly reduces the immune system, inducing bacterial invasion. The coupling of tissue repair and antibacterial treatment is critical for infected diabetic ulcer regeneration. In this study, a dual-layered sodium alginate/carboxymethyl chitosan (SA/CMCS) adhesive film cored with an SA-bFGF microsphere-loaded small intestine submucosa (SIS) hydrogel composite dressing with a graphene oxide (GO)-based antisense transformation system was developed to promote infected diabetic wound healing and bacterial eradication. Initially, our injectable SIS-based hydrogel composite stimulated angiogenesis, collagen deposition, and immunoregulation in diabetic wound repair. The GO-based transformation system subsequently inhibited bacterial viability in infected wounds by post-transformation regulation. Meanwhile, the SA/CMCS film provided stable adhesion covering the wound area to maintain a moist microenvironment, which promoted in situ tissue repair. Our findings provide a promising clinical translation strategy for promoting the healing of infected diabetic wounds.
ISSN:1944-8244
1944-8252
1944-8252
DOI:10.1021/acsami.2c22650