响应型生物降解磁性介孔二氧化硅纳米粒子的制备与表征
傅研博 , 张慧霞 , 王瑞雪 , 李文涛 , 曹希传
现代化工 ›› 2026, Vol. 46 ›› Issue (3) : 137 -142.
响应型生物降解磁性介孔二氧化硅纳米粒子的制备与表征
Preparation and characterization of responsive biodegradable magnetic mesoporous silica nanoparticles
为了克服传统纳米粒子在人体复杂环境中的副作用问题,通过集成pH/还原双响应释放、磁性靶向治疗(MDT)和高载药性能,构建一种多功能可降解磁性药物递送系统。通过引入双[3-(三乙氧基硅)丙基]-四硫化物(BTES)构建二硫键交联的硅基骨架,赋予粒子在肿瘤微环境高浓度谷胱甘肽(GSH)下的可控降解能力,进一步通过硼氢化钠原位还原三氯化铁,在粒子孔隙及表面生成铁,实现磁性及负电表面,从而增强对带正电药物的负载能力,以及对磁性的靶向作用。选用盐酸阿霉素(DOX)作为药物模型,通过模拟肿瘤与正常环境来表征其在人体内的药物释放机制,粒子降解能力来推断药物的性能以及其安全性。还通过傅里叶红外光谱仪(FT-IR)、X射线衍射仪(XRD)、透射电镜(TEM)和Zeta电位分析仪对该粒子进行多方面表征。
To overcome the side effects of traditional nanoparticles in complex human physiological environments,a multifunctional degradable magnetic drug delivery system was constructed by integrating pH/reduction dual-responsive release,magnetic targeting therapy (MDT),and high drug-loading capacity.By introducing Bis[3-(triethoxysilyl)propyl] tetrasulfide (BTES),a disulfide bond-crosslinked silica framework was formed,endowing the particles with controllable degradation capability under high glutathione (GSH) concentrations in the tumor microenvironment.Subsequently,iron was generated in situ within the particle pores and surface by sodium borohydride reduction of ferric chloride,achieving magnetism and a negatively charged surface.This enhanced the loading capacity for positively charged drugs and enabled magnetic targeting.Doxorubicin (DOX) was selected as the model drug.By simulating the tumor and normal tissue environments to characterize the drug release mechanisms and particle degradation capability within the human body,to infer the drug performance and its safety.Comprehensive characterization was performed using Fourier transform infrared spectrometer (FT-IR),X-ray diffractometer (XRD),transmission electron microscopy (TEM),and Zeta potential analyzer.
介孔二氧化硅 / 药物递送 / 生物降解 / 磁性粒子 / 多元响应
mesoporous silica / drug delivery / biodegradable / magnetic nanoparticles / multi-responsive
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刘静, 顾天航, 王伟, |
中国矿业大学省级大学生创新创业训练项目(202410290235Y)
国家自然科学基金国际合作重点项目(22120102001)
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