4.8 Article

Covalent Organic Framework-Incorporated Nanofibrous Membrane as an Intelligent Platform for Wound Dressing

期刊

ACS APPLIED MATERIALS & INTERFACES
卷 14, 期 7, 页码 8680-8692

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c19754

关键词

covalent organic frameworks; curcumin; encapsulation; nanofibrous membranes; pH-triggered release; wound healing

资金

  1. Zhejiang Provincial Natural Science Foundation of China [LR20C200001]

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Covalent organic frameworks (COFs) have emerged as promising drug carriers in biomedical applications, but their potential in wound healing has not been extensively studied. In this study, a curcumin-loaded COF was prepared and incorporated into polycaprolactone nanofibrous membranes to develop a pH-triggered drug release platform for wound dressing. The CUR@COF-based membranes exhibited excellent properties and promoted wound healing and skin regeneration by reducing inflammation and enhancing angiogenesis.
Covalent organic frameworks (COFs) possess fascinating features that have sparked increasing interest as drug carriers in biomedical applications. However, the promising properties of COFs in wound healing have rarely been reported. Herein, a facile one-pot method is reported to prepare a curcumin-loaded COF (CUR@COF) by the condensation reaction and the Schiff base reaction and to further incorporate CUR@COF into polycaprolactone (PCL) nanofibrous membranes (CUR@COF/PCL NFMs) through electrospinning to develop a pH-triggered drug release platform for wound dressing. CUR@COF has a high CUR loading capacity of 27.68%, and CUR@ COF/ PCL NFMs exhibit increased thermal stability, improved mechanical properties, good biocompatibility, and enhanced antibacterial and antioxidant activities. More importantly, CUR@COF-based membranes show a pH-responsive CUR release profile by protonation under acidic conditions, suggesting the promotion of CUR release from membranes under an acidic extracellular microenvironment. The histopathological analysis and immunofluorescence staining of an in vivo skin defect model indicate that CUR@COF/PCL NFMs can accelerate wound healing and skin regeneration by reducing the expression of inflammatory factors (TNF-alpha) and enhancing the expression of angiogenesis (VEGF). This work provides a new strategy by employing COF-based drug-encapsulated nanocomposites for wound dressing applications.

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