Intradermal administration of green synthesized nanosilver (NS) through film-coated PEGDA microneedles for potential antibacterial applications

作者全名："Gao, Ya; Zhang, Wei; Cheng, Yan Fang; Cao, Yang; Xu, Zhigang; Xu, Li Qun; Kang, Yuejun; Xue, Peng"

作者地址："[Gao, Ya; Cheng, Yan Fang; Xu, Zhigang; Xu, Li Qun; Kang, Yuejun; Xue, Peng] Southwest Univ, Sch Mat & Energy, Chongqing 400715, Peoples R China; [Zhang, Wei; Cao, Yang] Chongqing Med Univ, Affiliated Hosp 2, Inst Ultrasound Imaging, Chongqing Key Lab Ultrasound Mol Imaging, Chongqing 400010, Peoples R China"

通信作者："Kang, YJ; Xue, P (corresponding author), Southwest Univ, Sch Mat & Energy, Chongqing 400715, Peoples R China."

来源：BIOMATERIALS SCIENCE

ESI学科分类：MATERIALS SCIENCE

WOS号：WOS:000632135400024

JCR分区：Q2

影响因子：6.6

年份：2021

卷号：9

期号：6

开始页：2244

结束页：2254

文献类型：Article

关键词：　

摘要："Skin infections caused by pathogens, including bacteria, fungi and viruses, are difficult to completely eliminate through standard topical administration, owing to the restricted drug permeation into the epidermis layer. Herein, we developed a poly(ethylene glycol) diacrylate (PEGDA) microneedle patch with surface coating of a nanosilver (NS) encapsulated gelatin/sucrose film for antibacterial applications, by virtue of enhanced skin permeation by microneedle penetration and efficient drug delivery through rapid film dissolving. NS was facilely synthesized through a green process based on the bioinspired crystallization of ionic state silver in the presence of a silk fibroin (SF) template. A gelatin/sucrose polymeric film encapsulating NS was dressed on the surface of the mold cavity, and film-coated PEGDA (PEGDA/film-NS) microneedles were subsequently fabricated through standard ultraviolet (UV) light-induced polymerization. To demonstrate their advantages for therapeutic applications, the physicochemical properties of the as-developed microneedles were characterized in terms of their morphology, composition, mechanical strength, etc. Moreover, rapid NS release from PEGDA@film-NS microneedles driven by the aqueous environment was demonstrated under physiological conditions. Additionally, such film-coated microneedles exhibited good mechanical strength for skin penetration, and their antibacterial activity against Gram-positive bacteria (Staphylococcus epidermidis and Staphylococcus aureus) as well as Gram-negative bacteria (Escherichia coli and Pseudomonas aeruginosa) was verified using bacterial suspension in vitro. Altogether, such a minimally invasive strategy exhibited good potential for realizing a broad-spectrum antibacterial effect, which may provide a practical methodology for the management of polymicrobial skin infection during clinical trials."

基金机构："National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [51703186, 31671037]; Graduate Student's Research and Innovation Fund of Chongqing, China [CYB19093]"

基金资助正文："This project was supported by the National Natural Science Foundation of China (51703186 and 31671037), and the Graduate Student's Research and Innovation Fund of Chongqing, China (CYB19093)."