Department of Tissue Engineering, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran.
Material Engineering Department, Faculty of Engineering, Tarbiat Modares University, Tehran, Iran.
J Biomed Mater Res B Appl Biomater. 2024 Aug;112(8):e35454. doi: 10.1002/jbm.b.35454.
The quality of life is negatively impacted by chronic wounds for more than 25 million people in the US. They are quite prone to infection, which may lead to the eventual loss of a limb. By exposing the ulcers to treatment agents at the appropriate time, the healing rate is increased. On-demand drug release in a closed-loop system will aid us in reaching our goal. In this study, we have developed a platform capable of real-time diagnosis of bacterial infection by wirelessly reading wound pH, as well as slow and on-demand local administration of antibiotics. The drug carrier microparticles, an electrical patch, a thermoresponsive hydrogel with an integrated microheater, and a flexible pH sensor comprised the closed-loop patch. Here it is reported that slow and smart release of cefazolin can be addressed by incorporation of drug encapsulated hydrophobic microparticles embedded into a thermo-responsive hydrogel. The utilization of a programmable bandage to provide antibiotic medication highlights the need of not only choosing appropriate therapeutic substances but also the controlled release of the medicine and its rate of release within the wound area. The results of our study indicate that the use of cefazolin encapsulated polycaprolactone (PCL) microparticles can effectively regulate the application of antibiotic treatment for chronic skin wounds. The results also showed a substantial gradual release of cefazolin from the thermo-responsive Pnipam hydrogel when the wound dressing was subjected to a temperature of 37°C. We believe that the developed flexible smart bandage can have a significant impact on chronic wound healing.
美国超过 2500 万人的生活质量受到慢性伤口的负面影响。这些伤口很容易感染,最终可能导致肢体丧失。通过在适当的时间将溃疡暴露于治疗剂,可以提高愈合率。按需在闭环系统中释放药物有助于我们实现目标。在这项研究中,我们开发了一个平台,能够通过无线读取伤口 pH 值实时诊断细菌感染,以及缓慢而按需局部给予抗生素。药物载体微球、电贴片、集成微加热器的温敏水凝胶以及由柔性 pH 传感器组成的闭环贴片。在这里,我们报告说,通过将药物包封的疏水性微球嵌入温敏水凝胶中,可以解决头孢唑啉的缓慢和智能释放问题。可编程绷带的使用强调了不仅需要选择适当的治疗物质,还需要控制药物的释放及其在伤口区域的释放速度。我们的研究结果表明,使用包封头孢唑啉的聚己内酯(PCL)微球可以有效控制抗生素治疗慢性皮肤伤口的应用。结果还表明,当伤口敷料处于 37°C 的温度下时,热响应性 Pnipam 水凝胶可以实现头孢唑啉的大量逐渐释放。我们相信,开发的柔性智能绷带可以对慢性伤口愈合产生重大影响。