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Transdermal delivery of Chinese herbal medicine extract using dissolvable microneedles for hypertrophic scar treatment

引用

Acta Pharmaceutica Sinica B 2021年第9期11卷 2937-2944页

作者： Xiaoyu Ning Christian Wiraja Wan Ting Sharon Chewa Chen Fan Chenjie Xu NTU Institute for Health Technologies Interdisciplinary Graduate GroupNanyang Technological UniversitySingapore 639798Singapore School of Chemical and Biomedical Engineering Nanyang Technological UniversitySingapore 637459Singapore Skin Research Institute of Singapore 8A Biomedical GroveSingapore 138648Singapore Department of Biomedical Engineering City University of Hong KongHong Kong SAR 999077China

hypertrophic scars are unfavorable skin diseases characterized by excessive collagen deposition.Although systemic treatments exist in clinic to manage hypertrophic scars,they pose significant side effects and tend to lose efficacy over prolonged applications.Traditional Chinese medicine(TCM)offers as a promising candidate to treat pathological scars.A large number of TCMs have been studied to show anti-scarring effect,however,the natural barrier of the skin impedes their penetration,lowering its therapeutic efficacy.Herein,we reported the use of dissolvable hyaluronic acid(HA)microneedles(MNs)as a vehicle to aid the transdermal delivery of therapeutic agent,a model TCM called shikonin for the treatment of hypertrophic scars.Here,shikonin was mixed with HA to make MNs with adequate mechanical strength for skin penetration,making its dosage controllable during the fabrication process.The therapeutic effect of the shikonin MNs was studied in vira using HSFs and then further verified with quantitative reverse transcriptase polymerase chain reaction.Our data suggest that the shikonin HA MNs significantly reduce the viability and proliferation of the HSFs and downregulate the fibrotic-related genes(i.e.,TGFβ1,FAP-αand COL1 A1).Furthermore,we observed a localized therapeutic effect of the shikonin HA MNs that is beneficial for site-specific treatment.

关键词： Traditional Chinese medicine Shikonin Hyaluronic acid Microneedle hypertrophic scarring Drug delivery Transdermal delivery Skin

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