Polymer Vesicles with Upper Critical Solution Temperature for Near-infrared Light-triggered Transdermal Delivery of Metformin in Diabetic Rats

• 作者: Wei Hu Ya-Wei Su Yi-Kun Jiang Wen-Di Fan Song-Yue Cheng Zai-Zai Tong Chao Cen Guo-Hua Jiang
• 来源期刊: 高分子科学（英文版）
• 年，卷（期）: 2022,（2）
• 所属期刊栏目: RESEARCH ARTICLES
• 页码范围: 157-165
• 页数: 9页
• 语种: 英文

摘要

Near-infrared light (NIR)triggered transdermal drug delivery systems are of great interest due to their on-demand drug release,which enable to enhance drug treatment efficiency as well as reduce side effect.Herein,a NIR-triggered microneedle (MN) patch array has been fabricated through depositing the photothermal conversion agent and anti-diabetic drug-loaded polymer vesicles with upper critical solution temperature (UCST) into dissolvable polymer matrix.The UCST-type polymer has a clearing point temperature of 41 ℃ and the drug-loaded polymer vesicles present excellent NIR-triggered and temperature responsive drug release behavior in vitro due to the disassociation of polymer vesicles upon NIR irradiation.After applying MNs to diabetic rats,significant hypoglycemic effect is achieved upon interval NIR irradiation and the blood glucose concentration can decrease to normal state for several hours,which enables to achieve the goal of on-demand drug release.This work suggests that the NIR-triggered MN drug release device has a potential application in the treatment of diabetes,especially for those requiring an active drug release manner.