期刊
JOURNAL OF MATERIALS CHEMISTRY B
卷 10, 期 18, 页码 3501-3511出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2tb00126h
关键词
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资金
- National Natural Science Foundation of China [81871484, 82172096, 21875092]
- Guangdong Basic and Applied Basic Research Foundation [2021A1515012183]
In this study, a glucose-responsive insulin-releasing hydrogel microneedle dressing was developed for diabetic wound healing. The microneedle dressing exhibited mechanical stability, biocompatibility, glucose-responsive insulin release, and improved blood glucose control, making it effective for diabetic wound management and potentially useful for other chronic skin injuries.
Wound healing is a critical challenge in diabetic patients, mainly due to long-term dysglycemia and its related pathological complications. Subcutaneous insulin injection represents a typical clinical solution, while the low controllability of insulin administration commonly leads to a result far from the optimal therapeutic effect. In this work, we developed a glucose-responsive insulin-releasing hydrogel for microneedle dressing fabrication and then investigated its effects on diabetic wound healing. The hydrogel system was composed of biocompatible gelatin methacrylate (GelMa), glucose-responsive monomer 4-(2-acrylamidoethylcarbamoyl)-3-fluorophenylboronic acid (AFPBA) and gluconic insulin (G-insulin), and the Gel-AFPBA-ins hydrogel-based microneedle dressing was developed by replicating PDMS molds. The resultant hydrogel microneedle dressing exhibited adequate mechanical properties, high biocompatibility, glucose-responsive insulin release behavior upon exposure to different glucose solutions, and potent adhesion to the skin compared to hydrogels without microstructures. The microneedle dressing could accelerate the diabetic wound healing process with decreased inflammatory reaction, enhanced collagen deposition on the regenerated tissue sites, and improved blood glucose control in animals. Therefore, the glucose-responsive insulin-releasing hydrogel microneedle dressing is effective in diabetic wound management and has potential for treatment of other chronic skin injuries.
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