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介绍了超临界流体(SCF)技术制备复合载药微粒的原理、特点,总结了近几年SCF技术在制备药物复合微粒方面的研究情况,并就超临界流体技术应用于药物制剂方面的前景进行了探讨。 相似文献
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液相法制备纳米微粒的研究进展 总被引:8,自引:0,他引:8
对用液相法制备纳米微粒的各种方法 (沉淀法、水热合成法、溶剂蒸发法、微乳液法、溶胶 -凝胶法、超临界流体法、液相分散包裹法以及其它一些液相合成方法 )的技术特点、研究现状及其进展进行了评述 相似文献
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壳聚糖纳米粒子载药体系因其天然无毒、生物相容性高、可生物降解等特点,在生物医学、化工和食品等领域有广阔的应用前景。本文对制备壳聚糖纳米粒子的离子交联法、聚电解质复合法、乳化交联法、喷雾干燥法和溶剂蒸发法等主要方法进行了综述,并阐述了其制备原理和优缺点。此外,本文结合国内外学者近期的研究工作,综述了壳聚糖纳米粒子载药体系在抗肿瘤药物和抑菌药物方面的应用研究进展,并对壳聚糖装载降糖药物、降脂药物、治疗骨质疏松药物和抗癫痫药物应用进行了简介。最后结合壳聚糖纳米载药体系在制备方法及应用中存在的实际问题,提出多学科研究相结合,开发壳聚糖纳米载药体系的智能控释、靶向递送功能和突破人体特殊生物屏障功能将是其近期的重点研究方向。 相似文献
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在过去的几十年中,探索高效的微/纳米给药系统一直是药剂学领域的研究热点。不同的微/纳米颗粒已被用于药物输送的研究,以期实现有效靶向给药,最大限度地减少副作用,从而提高治疗效果。本文主要综述了微/纳米药物输送给药系统及在药物制剂领域应用。 相似文献
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Talita Goulart da Silva Debora Baptista Pereira Beatriz Ferreira de Carvalho Patricio Michelle Alvares Sarcinelli Helvécio Vinícius Antunes Rocha Sonia Letichevsky Cristiane Evelise Ribeiro da Silva Roberta Helena Mendonça 《应用聚合物科学杂志》2021,138(28):50678
Sodium alendronate (ALD) is a bisphosphonate used to treat osteoporosis. However, its oral administration has been associated with side effects as gastroesophageal reflux. Moreover, there are some particularities for the intake of the medicine, which also hinder the patient's compliance, for example, the instruction that it has to be taken with an empty stomach, 30 to 60 min before breakfast and avoid the decubitus position after using the drug. Therefore, biomaterials for applications in osteoporotic bones are a good alternative. Thus, this work aimed to produce a Polycaprolactone (PCL) and ALD-based powder as a supply to build biomaterials by selective laser sintering, compression molding (CM), solvent casting (SC), among others. The powder was produced by coating the ALD particles with PCL and films were produced by SC and CM techniques. The samples were characterized by Scanning Electron Microscopy, Energy-dispersive X-ray spectroscopy, X-ray diffraction, Fourier transform infrared spectrometry and thermal analysis. Furthermore, the drug release was evaluated by UV–Vis spectroscopy. Results showed that ALD particles were successfully coated by PCL and applied to the production of biomaterials, highlighting its potential in the treatment of osteoporosis. 相似文献
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高分子复合生物材料的研究进展 总被引:2,自引:0,他引:2
本文综述了近年来用于骨修复的各类高分子复合生物材料的研究状况,并从力学性能的改善和降解速率的可调性等角度,总结了高分子复合生物材料与单一组分的材料相比在生物医用领域应用中所表现出的综合使用性能的优越性,提出将与人骨中磷灰石微晶类似的无机纳米粒子与具有降解性能的有机生物材料进行复合,能够得到具有优越骨修复性能的新型骨生物材料。 相似文献
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玉米醇溶蛋白(Zein)是一种天然可食性植物大分子,具有可再生性、无毒性、两亲性及良好的生物相容性和生物可降解性,可通过自组装形成微球或纳米粒。近年来,Zein用作药物输送系统(drug delivery system,DDS)载体材料成为研究热点,可通过Zein的自组装特性将药物包载在其内部获得Zein-DDS微粒。本文简述了Zein的特性及其作为DDS载体的优势,总结了Zein-DDS的制备方法、性能及Zein的修饰改性研究进展,指出Zein具有较强的疏水性和抗胃酸分解特性,Zein-DDS可有效地提高药物稳定性、延缓药物释放及增强药物靶向性。因此,Zein用作DDS的载体具有广阔的应用前景,今后的研究工作将会在拓宽研究领域、改进制备方法及Zein的修饰改性等方面展开。 相似文献
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A series of amphiphilic graft polyphosphazenes with hydrophilic weight fraction ranging from 0.40 to 0.55 were synthesized. These copolymers could self-assemble into distinct aggregates in aqueous solutions. Spherical micelles were observed for the copolymer sample with higher hydrophilic weight fraction. However, when the hydrophilic weight fractions decreased to less than 0.50, vesicle-like polymersomes were formed. Doxorubicin hydrochloride (DOX·HCl), a water-soluble anti-cancer drug, was successfully loaded into the aqueous core of polymersome, which was clearly observed by transmission electron microscopy. The in vitro release of DOX·HCl from polymersome carries further confirmed its encapsulation. In addition, the cytotoxicity of DOX against HepG2 cells was significantly enhanced via polymersome delivery. These results suggest that amphiphilic graft polyphosphazenes could be used for the delivery of water-soluble drugs as polymersome vehicles. 相似文献
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生物基来源的聚合物具有生物相容性高、无毒易降解等优势,近些年来作为药物载体在生物医药领域受到了广泛的关注。人体内的生理环境存在pH差异,利用pH作为刺激响应的信号,可以赋予聚合物纳米载药系统理想的靶向释药性能。本综述着眼于pH敏感性的生物基聚合物纳米粒子,揭示了纳米载药粒子中化学键断裂与质子化作用两种pH响应的控释机制,并针对两者的控释特点进行了分析总结。在此基础上,介绍了几种生物基药物载体的pH控释研究及其在生物医药领域的应用进展,并提出了目前利用各种生物基材料作为药物载体存在的问题。最后,针对目前存在的载药量低、敏感性不强等问题,提出了可采用多种方式联合载药、多重刺激响应结合等方式进行深入研究的展望。 相似文献
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Recently, poly (?-caprolactone) (PCL) has gained a lot of attention, and shown great potential in biomedical applications. Among synthetic polymers, PCL is one of the easiest to process and manipulate into a large range of shapes and sizes due to its low melting temperature and its superior viscoelastic properties. In this review article the authors focus mainly on the properties of PCL-based biomaterials relevant to drug delivery and tissue engineering applications. The authors provide an insight into the recent developments and challenges of PCL-based biomaterials as a critical component of new therapeutic strategies for many diseases. 相似文献
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The versatility and applicability of thermoresponsive polymeric systems have led to great interest and a multitude of publications. Of particular significance, multifunctional poly(N-isopropylacrylamide) (PNIPAAm) systems based on PNIPAAm copolymerized with various functional comonomers or based on PNIPAAm combined with nanomaterials exhibiting unique properties. These multifunctional PNIPAAm systems have revolutionized several biomedical fields such as controlled drug delivery, tissue engineering, self-healing materials, and beyond (e.g., environmental treatment applications). Here, we review these multifunctional PNIPAAm-based systems with various cofunctionalities, as well as highlight their unique applications. For instance, addition of hydrophilic or hydrophobic comonomers can allow for polymer lower critical solution temperature modification, which is especially helpful for physiological applications. Natural comonomers with desirable functionalities have also drawn significant attention as pressure surmounts to develop greener, more sustainable materials. Typically, these systems also tend to be more biocompatible and biodegradable and can be advantageous for use in biopharmaceutical and environmental applications. PNIPAAm-based polymeric nanocomposites are reviewed as well, where incorporation of inorganic or carbon nanomaterials creates synergistic systems that tend to be more robust and widely applicable than the individual components. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137, 48770. 相似文献