Antibacterial anti-oxidant electroactive injectable hydrogel as self-healing wound dressing with hemostasis and adhesiveness for cutaneous wound healing

  • Biomaterials. 2017 Apr:122:34-47. doi: 10.1016/j.biomaterials.2017.01.011.
Xin Zhao  1 ,  Hao Wu  2 ,  Baolin Guo  3 ,  Ruonan Dong  1 ,  Yusheng Qiu  2 ,  Peter X Ma  4
Affiliations
  • 1. Frontier Institute of Science and Technology, and State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China.
  • 2. Department of Orthopaedics, The First Affiliated Hospital, College of Medicine, Xi'an Jiaotong University, Xi'an, 710061, China.
  • 3. Frontier Institute of Science and Technology, and State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China. Electronic address: [email protected].
  • 4. Frontier Institute of Science and Technology, and State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China; Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA; Department of Biologic and Materials Sciences, University of Michigan, 1011, North University Ave., Room 2209, Ann Arbor, MI 48109, USA; Macromolecular Science and Engineering Center, University of Michigan, Ann Arbor, MI 48109, USA.
PMID: 28107663 DOI: 10.1016/j.biomaterials.2017.01.011
Abstract

Injectable self-healing hydrogel dressing with multifunctional properties including Anti-infection, anti-oxidative and conductivity promoting wound healing process will be highly desired in wound healing application and its design is still a challenge. We developed a series of injectable conductive self-healed hydrogels based on quaternized chitosan-g-polyaniline (QCSP) and benzaldehyde group functionalized poly(ethylene glycol)-co-poly(glycerol sebacate) (PEGS-FA) as Antibacterial, anti-oxidant and electroactive dressing for cutaneous wound healing. These hydrogels presented good self-healing, electroactivity, free radical scavenging capacity, Antibacterial activity, adhesiveness, conductivity, swelling ratio, and biocompatibility. Interestingly, the hydrogel with an optimal crosslinker concentration of 1.5 wt% PEGS-FA showed excellent in vivo blood clotting capacity, and it significantly enhanced in vivo wound healing process in a full-thickness skin defect model than quaternized chitosan/PEGS-FA hydrogel and commercial dressing (Tegaderm™ film) by upregulating the gene expression of growth factors including VEGF, EGF and TGF-β and then promoting granulation tissue thickness and Collagen deposition. Taken together, the Antibacterial electroactive injectable hydrogel dressing prolonged the lifespan of dressing relying on self-healing ability and significantly promoted the in vivo wound healing process attributed to its multifunctional properties, meaning that they are excellent candidates for full-thickness skin wound healing.

Keywords
Antibacterial; Conductive hydrogel dressing; Electroactivity; Full thickness skin defect model; Self-healing; Wound healing.
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