PDA/Cu Bioactive Hydrogel with "Hot Ions Effect" for Inhibition of Drug-Resistant Bacteria and Enhancement of Infectious Skin Wound Healing.

Abstract

Quick and effective sterilization of drug-resistant bacteria inevitably became an ever-growing global challenge. In this study, a multifunctional composite (PDA/Cu-CS) hydrogel mainly composed of polydopamine (PDA) and copper-doped calcium silicate ceramic (Cu-CS) was prepared. It was confirmed that PDA/copper (PDA/Cu) complexing in the composite hydrogel played a key role in enhancing the photothermal performance and antibacterial activity. Through a unique "hot ions effect", created by the heating of Cu ions through the photothermal effect of the composite hydrogel, the hydrogel showed high-efficiency, quick, and long-term inhibition of methicillin-resistant Staphylococcus aureus and Escherichia coli. In addition, the hydrogel possessed remarkable bioactivity to stimulate angiogenesis. The in vivo results confirmed that the "hot ions effect" of the composite hydrogel removed existing infection in the wound area efficiently and significantly promoted angiogenesis and collagen deposition during infectious skin wound healing. Our results suggested that the design of multifunctional hydrogels with "hot ions effect" may be an effective therapeutic approach for the treatment of infectious wounds.

• Authors: Qing Xu, Mengling Chang, Yu Zhang, Endian Wang, Min Xing, Long Gao, Zhiguang Huan, Feng Guo, Jiang Chang
• Journal: ACS applied materials & interfaces (ACS Appl Mater Interfaces) Vol. 12 Issue 28 Pg. 31255-31269 (Jul 15 2020) ISSN: 1944-8252 [Electronic] United States
• PMID: 32530593 (Publication Type: Journal Article)

Chemical References

• Anti-Bacterial Agents
• Calcium Compounds
• Hydrogels
• Indoles
• Polymers
• Silicates
• polydopamine
• Copper
• calcium silicate

Topics

• Anti-Bacterial Agents (chemistry, pharmacology, therapeutic use)
• Calcium Compounds (chemistry, pharmacology)
• Copper (chemistry)
• Escherichia coli (drug effects)
• Hydrogels (chemistry)
• Indoles (chemistry)
• Polymers (chemistry)
• Silicates (chemistry, pharmacology)
• Staphylococcus aureus (drug effects)
• Wound Healing (drug effects)
• Wound Infection (drug therapy)