Wound healing potential of antibacterial microneedles loaded with green tea extracts

Title
Wound healing potential of antibacterial microneedles loaded with green tea extracts
Authors
허윤석
Keywords
Microneedles, Hyaluronic acid, Green tea extract, Transdermal drug delivery, Antibacterial activity, Wound healing
Issue Date
2014-06
Publisher
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
Series/Report no.
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS ; Vol42 no.10 Startpage 757 Endpage 762
Abstract
This study evaluates the utility of an antibacterial microneedle composed of green tea (GT) extract and hyaluronic acid (HA), for the efficient delivery of GT. These microneedles have the potential to be a patient-friendly method for the conventional sustained release of drugs. In this study, a fabrication method using a mold-based technique to produce GT/HA microneedles with a maximum area of ~ 50 mm2 with antibacterial properties was used to manufacture transdermal drug delivery systems. Fourier transform infrared (FTIR) spectrometry was carried out to observe the potential modifications in the microneedles, when incorporated with GT. The degradation rate of GT in GT/HA microneedles was controlled simply by adjusting the HA composition. The effects of different ratios of GT in the HA microneedles were determined by measuring the release properties. In HA microneedles loaded with 70% GT (GT70), a continuous higher release rate was sustained for 72 h. The in vitro cytotoxicity assays demonstrated that GT/HA microneedles were not generally cytotoxic to Chinese hamster ovary cells (CHO-K1), human embryonic kidney cells (293T), and mouse muscle cells (C2C12), which were treated for 12 and 24 h. Antimicrobial activity of the GT/HA microneedles was demonstrated by ~ 95% growth reduction of gram negative [Escherichia coli (E. coli), Pseudomonas putida (P. putida), and Salmonella typhimurium (S. typhimurium)] and gram positive bacteria [Staphylococcus aureus (S. Aureus) and Bacillus subtilis (B. subtilis)], with GT70. Furthermore, GT/HA microneedles reduced bacterial growth of infected wound sites in the skin and improved wound healing process of skin in rat model.
URI
https://doi.org/10.1016/j.msec.2014.06.021
http://dspace.inha.ac.kr/handle/10505/53463
ISSN
0928-4931
Appears in Collections:
College of Engineering(공과대학) > Biotechnology (생명공학) > Journal Papers, Reports(생명공학 논문, 보고서)
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