Hardy John G, Larrañeta Eneko, Donnelly Ryan F, McGoldrick Niamh, Migalska Katarzyna, McCrudden Maelíosa T C, Irwin Nicola J, Donnelly Louise, McCoy Colin P
School of Pharmacy, Queens University Belfast, Medical Biology Centre , 97 Lisburn Road, Belfast BT9 7BL, Northern Ireland U.K.
Mol Pharm. 2016 Mar 7;13(3):907-14. doi: 10.1021/acs.molpharmaceut.5b00807. Epub 2016 Feb 8.
We describe, for the first time, stimulus-responsive hydrogel-forming microneedle (MN) arrays that enable delivery of a clinically relevant model drug (ibuprofen) upon application of light. MN arrays were prepared using a polymer prepared from 2-hydroxyethyl methacrylate (HEMA) and ethylene glycol dimethacrylate (EGDMA) by micromolding. The obtained MN arrays showed good mechanical properties. The system was loaded with up to 5% (w/w) ibuprofen included in a light-responsive 3,5-dimethoxybenzoin conjugate. Raman spectroscopy confirmed the presence of the conjugate inside the polymeric MN matrix. In vitro, this system was able to deliver up to three doses of 50 mg of ibuprofen upon application of an optical trigger over a prolonged period of time (up to 160 h). This makes the system appealing as a controlled release device for prolonged periods of time. We believe that this technology has potential for use in "on-demand" delivery of a wide range of drugs in a variety of applications relevant to enhanced patient care.
我们首次描述了一种光响应性水凝胶形成微针(MN)阵列,该阵列在光照下能够递送具有临床相关性的模型药物(布洛芬)。通过微成型技术,使用由甲基丙烯酸2-羟乙酯(HEMA)和乙二醇二甲基丙烯酸酯(EGDMA)制备的聚合物制备MN阵列。所获得的MN阵列显示出良好的机械性能。该系统负载了高达5%(w/w)的布洛芬,其包含在光响应性3,5-二甲氧基苯偶姻共轭物中。拉曼光谱证实了共轭物在聚合物MN基质中的存在。在体外,该系统在长时间(长达160小时)施加光触发时能够递送多达三剂50毫克的布洛芬。这使得该系统作为一种长时间控释装置具有吸引力。我们相信,这项技术有潜力在与改善患者护理相关的各种应用中用于“按需”递送多种药物。
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