Acta Chimica Sinica ›› 2024, Vol. 82 ›› Issue (11): 1150-1161.DOI: 10.6023/A24080252 Previous Articles     Next Articles

Article

葛根素纳米银合成及光热杀菌和促糖尿病感染伤口愈合作用研究

王英辉a, 王雨辉b, 熊佳瑶b, 苏思琪b, 郝梦珂b, 魏思敏b,*()   

  1. a 长安大学 理学院 陕西西安 710064
    b 陕西中医药大学 陕西中药资源产业化省部共建协同创新中心秦药特色资源研究开发国家重点实验室(培育) 陕西咸阳 712083
  • 投稿日期:2024-08-25 发布日期:2024-10-22
  • 基金资助:
    国家自然科学基金(22103007); 国家自然科学基金(82274353); 陕西省重点研发计划(2024SF-YBXM-517); 陕西省重点研发计划(2024SF-YBXM-426); 陕西省创新能力支撑计划-青年科技新星项目(2023KJXX-063); 中央高校基本科研业务费(300102124207); 陕西中医药大学2023年度科技创新人才体系建设计划(2023-LJRC-03); 秦药特色资源研究开发重点实验室开放课题项目(SUCM-QM202207)

The Fabrication of Silver Nanoparticles Using Puerarin and the Photothermal Sterilization and Diabetic Wound Healing Behavior

Yinghui Wanga, Yuhui Wangb, Jiayao Xiongb, Siqi Sub, Mengke Haob, Simin Weib()   

  1. a College of Science, Chang’an University, Xi’an 710064, China
    b State Key Laboratory of Research & Development of Characteristic Qin Medicine Resources (Cultivation), Co-construction Collaborative Innovation Center for Chinese Medicine Resources Industrialization by Shaanxi & Education Ministry, Shaanxi University of Chinese Medicine, Xianyang 712083, China
  • Received:2024-08-25 Published:2024-10-22
  • Contact: *E-mail: weismiccas@163.com
  • Supported by:
    National Natural Science Foundation of China(22103007); National Natural Science Foundation of China(82274353); Key Research and Development Plan of Shaanxi Province(2024SF-YBXM-517); Key Research and Development Plan of Shaanxi Province(2024SF-YBXM-426); Science and Technology Youth Stars Project of Shaanxi Province(2023KJXX-063); Fundamental Research Funds for the Central Universities, CHD(300102124207); Science and Technology Innovation Talent System Construction Plan of Shaanxi University of Chinese medicine(2023-LJRC-03); Open Project of State Key Laboratory of Research and Development of Characteristic Qin Medicine Resources(SUCM-QM202207)

The complexity of plant extract incurs the uncertainty of capping and reducing agents in the biosynthesis of silver nanoparticles (AgNPs) leading to a poor reproducibility, which dramatically limits the application of this method. To overcome this problem, the puerarin (Pue), which is an isoflavone derived from kudzu roots and has strong biological activities, is directly used as the reducing and capping agents to prepare bioactive AgNPs (Pue@AgNPs). The influence of biosynthesis parameters like pH (Pue solution), concentration of both Pue and AgNO3 and incubation time were assessed to obtain Pue@AgNPs with superior bactericidal activity and photothermal effect. The as-prepared AgNPs are nearly spherical mainly existing in the monodispersed form with a small amount of aggregation, covering by anions (-44.0 mV) and revealing a high degree of stability (at least 15 days). It is conceived that the aggregation of Pue@AgNPs is responsible for absorbing near-infrared light (808 nm). The X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM) and selected area electron diffraction (SAED) studies show that Pue@AgNPs has a face-centered cubic (fcc) structure. The Pue@AgNPs show potent photothermal effect and antibacterial activity against Escherichia coli (E. coli), Staphylococcus aureus (S. aureus) and Methicillin-resistant Staphylococcus aureus (MRSA) under 808 nm laser radiation. The minimum inhibition concentration (MIC) values for E. coli, S. aureus and MRSA are 50.0 μg•mL−1. The internalization of Pue@AgNPs displays a variant trend suggesting the different mechanism of cell death. For E. coli, cell wall and intracellular damage may be responsible for cell death. However, for S. aureus and MRSA, the cell death may be rooted in oxidative stress or intracellular penetration. The Pue@AgNPs also exhibits superior antioxidation activity in trapping 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) radical cation (ABTS•+) and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical, and could accelerate diabetic wound contraction and healing within 21 days. The histological analysis showed that Pue@AgNPs could reduce inflammation and accelerate the formation of blood and collagen deposition.

Key words: puerarin, silver nanoparticles, photothermal effect, antibacterial agent, antioxidant, wound dressing