3D PCL/collagen nanofibrous medical dressing for one-time treatment of diabetic foot ulcers

• Published in: Colloids and surfaces, B, Biointerfaces B, Biointerfaces, 2022-06, Vol.214, p.112480-112480, Article 112480
• Main Authors: Chang, Ting, Yin, Huiyi, Yu, Xi, Wang, Lihuan, Fan, Longfei, Xin, John H., Yu, Hui
• Format: Article
• Language: English
• Subjects: Anti-Bacterial Agents - pharmacology; Bandages; Collagen; Diabetes Mellitus; Diabetic Foot - drug therapy; Diabetic foot ulcer; Escherichia coli; Humans; Nanofibers; Nanofibrous medical dressing; One-time dressing change; Polycaprolactone; Staphylococcus aureus
• ISSN: 0927-7765; 1873-4367
• DOI: 10.1016/j.colsurfb.2022.112480

Nanofibrous dressings exhibit high specific surface areas, good histocompatibility, enhanced wound healing, and reduced inflammation, which have broad technological implications for treating diabetic foot ulcers (DFUs). However, current nanofibrous dressings still suffer from high resistance to cell infiltration and multiple dressing changes. In this study, polycaprolactone (PCL) and collagen were adopted as electrospinning materials to prepare a 3D PCL/Collagen (PC) nanofibrous dressing (3D-PC) using aqueous phase fibre reassembly technology. The matrix metalloproteinases (MMPs) inhibitor doxycycline hyclate (DCH)-loaded halloysite nanotubes (HNTs) (DCH@HNTs) and antibacterial agent cephalexin (CEX) were loaded onto the dressing to prepare a multifunctional 3D drug-loaded PCL/Collagen nanofibrous dressing to promote DFU wound healing. The obtained 3D nanofibrous dressing exhibited high water absorption capacity and swelling capacity. It showed good antibacterial activity against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) in vitro antibacterial test. In addition, the 3D nanofibrous dressing demonstrated good biocompatibility. It could significantly reduce the frequency of dressing changes and improve the healing of DFU wounds compared with the conventional multiple dressing changes method, suggesting a potential candidate for healing diabetic wounds. [Display omitted] •3D PCL/Collagen nanofibrous dressing prepared using aqueous phase fibre reassembly technology.•3D drug-loaded PCL/Collagen nanofibrous dressing has good antibacterial and biocompatibility.•3D drug-loaded PCL/Collagen nanofibrous dressing reduces the need for dressing change to treat DFU wounds.