Amoxicillin-laded sodium alginate/cellulose nanocrystals/polyvinyl alcohol composite nanonetwork sponges with enhanced wound healing and antibacterial performance

• Published in: International journal of biological macromolecules 2024-11, Vol.280 (Pt 1), p.135701, Article 135701
• Main Authors: Qi, Houjuan, Yang, Lifei, Ma, Rongxiu, Xiang, Yushuang, Dai, Yuxin, Ren, Juanna, Xu, Ben Bin, El-Bahy, Zeinhom M., Thabet, Hamdy Khamees, Huang, Zhanhua, Ben, Wei, Yu, Huimin, Guo, Zhanhu
• Format: Article
• Language: English
• Subjects: Antibacterial activity; Composite sponge; Wound healing
• ISSN: 0141-8130; 1879-0003; 1879-0003
• DOI: 10.1016/j.ijbiomac.2024.135701

Wound healing is a complex process and reuires a long repair process. Poor healing effect is normally a challenge for wound healing. Designing sponge dressings with drug-assisted therapy, good breathability, and multiple functional structures effectively promotes wound healing. In this work, a flexible amoxicillin-laded (AMX) sodium alginate (SA)/cellulose nanocrystals (CNCs)/ polyvinyl alcoho (PVA) (SA/CNCs/PVA-AMX, SCP-AMX) wound dressing was designed and built with an excellent porous structure, suitable porosity, and anti-bacterial properties for promoting wound tissue reparation. The porous structure of the wound dressing was fabricated by freeze-thawing cyclic and freeze-dried molding process. This wound dressing exhibited a 3D porous structure for soft-tissue-engineering application, including high porosity (84.2%), swelling ratio (1513%), tensile strength (1.79 MPA), and flexibility. With the inhibition zones of Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) being 1.96 and4.58 cm, respectively, this wound dressing demonstrated good antibacterial activity against E. coli and S. aureus. More importantly, wound healing assay in vivo indicates that SCP-AMX could inhibit wound infection, promote collagen deposition, reduce inflammation, and accelerate granulation tissue and wound healing. Thus, the reported wounding dressings present excellent biocompatibility, high antibacterial activities, and excellent biosafety with great potential in wound healing applications. [Display omitted] •Sodium alginate/cellulose nanocrystals/polyvinyl alcohol (SCP) dressings were prepared by freeze-thawing and freeze-dried technology.•SCP dressing had good breathability, moisture retention, and softness.•SCP-AMX demonstrated promoted wound healing in vivo and inhibited scar formation.