自微乳药物传递系统的研究进展

综述了自微乳药物传递系统的最新研究进展，并详细阐述了该系统的主要特点、形成机制、处方组成、体内外评价和影响口服制剂生物利用度的因素，并介绍了近年来该药物传递系统的应用研究情况。     

固体自乳化药物传递系统的研究概况

综述固体自乳化药物传递系统的定义与特点、处方组分、制备工艺、药物体外释放和体内吸收的影响因素及质量评价指标。固体自乳化药物传递系统为一种新型制剂，可以显著提高难溶性药物的口服生物利用度，还可以通过添加各种固体辅料或采用包衣技术制备缓控释产品。     

药物共晶口服递送技术研究进展

提高难溶性药物口服递送的生物利用度一直以来都是药学研究的难点和挑战。基于晶体工程学理论的药物共晶能够在不改变药物化学结构的基础上改善药物的稳定性、溶解度以及生物利用度,因而受到越来越多的关注。本文综述了近年来口服药物共晶的制备和表征方法、共晶口服吸收的影响因素、体内外相关性等最新进展。     

口服固体自微乳化给药系统的研究进展

目的对新近发展的固体自微乳化给药系统（S-SMEDDS）文献进行综述。方法查阅近年国内外相关文献并进行归纳和总结。结果对固体自微乳的载体、固化技术以及缓控释制剂进行了探讨,为研究水难溶性药物的生物利用度及适合药物释放特性的S-SMEDDS技术提供相关参考。结论固体自微乳化系统可以显著提高难溶性药物的口服生物利用度,且兼顾了液态自微乳和固体制剂二者的优势,是一个极具潜力的新型制剂。     

依托泊苷固体自微乳的研制及大鼠体内生物利用度研究

目的:制备依托泊苷固体自微乳制剂(SSMEDDS)并研究大鼠灌胃后的药动学行为,提高依托泊苷口服生物利用度.方法:通过相图法得到相应的自乳化区域,并以自乳化速率、粒径及溶解度等作为考察指标筛选处方,寻找出最佳处方配比;采用溶出度实验测定依托泊苷固体自微乳的体外溶出度等理化参数;考察了依托泊苷固体自微乳制剂、市售制剂和原料药混悬液经大鼠灌胃给药后的药动学行为.结果:依托泊苷自微乳的平均粒径为(21.8±1.5)nm,且固体自微乳制剂45 min溶出95％以上,同时药动学数据显示依托泊苷固体自微乳、原料药和市售制剂的AUC分别为12.20、8.25、10.49 mg·h·L-1.结论:VP-16制成固体自微乳制剂后的AUC略高于市售制剂,且大大提高了依托泊苷原料药的生物利用度.     

自微乳释药系统及其制剂的研究进展

根据近期报道的自微乳释药系统最新研究进展,详细阐述自微乳释药系统的特点、性质、机制、处方工艺和质量评价,并介绍了有代表性的自微乳制剂。自微乳释药系统能显著增加某些药物的吸收和生物利用度,在药学领域将有很好的应用前景。     

固体自乳化新剂型的研究进展

在药物的研发过程中,大约40%以上的新活性物质由于水溶性差,制剂处方和工艺复杂,口服生物利用度存在较多问题。因此,提高难溶性药物的溶出度和生物利用度具有十分重要的临床意义和研究价值。自乳化给药系统(self-emulsifying drug delivery system,SEDDS)是近年发展起来     

自微乳释药系统研究进展

简要介绍了自微乳释药系统的组成、体外释药研究方法及自微乳新型制剂的研究进展.自微乳新型制剂主要包括固体自微乳、过饱和自微乳和正电荷自微乳,新型自微乳制剂可以弥补其不足,更好地发挥自微乳固有特点.     

新型自乳化给药系统研究进展

自乳化给药系统因可提高药物的吸收速度和程度,增强难溶性药物的溶解能力,提高生物利用度而成为当前药剂研究的一大热点。本综述就近几年国内外关于自乳化给药系统的最新研究进展作一简要介绍。     

自微乳药物传递系统及其在中药制剂研究中的应用

自微乳药物传递系统（Self—microemulsifying drug delivery system，SMEDDS）是由脂溶性或水难溶性药物、油相、乳化剂和助乳化剂组成，外观均一透明，由于乳化剂的存在，在环境温度及温和搅拌的条件下，遇水自微乳化成水包油（O／W）型、粒径小于100nm的乳剂。它可将某些疏水性、吸收较差的药物制成口服液体或固体（软胶囊）制剂，除了可以提高药物的生物利用度和稳定性外，还可拓宽药物的使用人群（如儿童、难以吞咽的患者等），易于工业化生产，是一种理想的给药剂型，因此引起了药学工作者的广泛关注。     

Research progress of in-situ gelling ophthalmic drug delivery system

 Blindness and vision impairment are the most devastating global health problems resulting in a substantial economic and social burden. Delivery of drug to particular parts of the anterior or posterior segment has been a major challenge due to various protective barriers and elimination mechanisms associated with the unique anatomical and physiological nature of the ocular system. Drug administration to the eye by conventional delivery systems results in poor ocular bioavailability (<5%). The designing of a novel approach for a safe, simple, and effective ocular drug delivery is a major concern and requires innovative strategies to combat the problem. Over the past decades, several novel approaches involving different strategies have been developed to improve the ocular delivery system. Among these, the ophthalmic in-situ gel has attained a great attention over the past few years. This review discussed and summarized the recent and the promising research progress of in-situ gelling in ocular drug delivery system.     

固体脂质纳米粒和纳米结构脂质载体在药物传递中的研究进展

基于固体脂质的纳米粒（Solid lipid - based nanoparticles,SLBNs）作为新型药物传递系统比常规的药物传递系统存在优势。通常,基于固体脂质的纳米粒可以分成两种形态,即固体脂质纳米粒（ Solid lipid nanoparticles, SLNs）和纳米结构脂质载体（Nanostructured lipid carriers,NLCs）。但固体脂质纳米粒与纳米结构脂质载体在基质的组成上不同,本文就基于固体脂质的纳米粒的制备技术、表征方法及应用的最新研究进展进行总结,为基于固体脂质的纳米粒进一步研究提供参考依据。     

Enhanced oral bioavailability of dexibuprofen by a novel solid Self-emulsifying drug delivery system (SEDDS)

The main objective of this study was to prepare a solid form of lipid-based self-emulsifying drug delivery system (SEDDS) by spray drying liquid SEDDS with an inert solid carrier Aerosil 200 to improve the oral bioavailability of poorly water-soluble drug dexibuprofen. The liquid SEDDS was a system that consisted of dexibuprofen, Labrasol, Capryol 90 and Labrafil M 1944 CS. The particle size analysis revealed no difference in the z-average particle diameter of the reconstituted emulsion between liquid and solid SEDDS. The solid SEDDS was characterized by SEM, DSC and XRD studies. In vivo results of solid SEDDS and dexibuprofen powder in rats at the dose of 10 mg/kg showed that the initial plasma concentrations of drug in solid SEDDS were significantly higher than those of dexibuprofen powder (P < 0.05). The solid SEDDS gave significantly higher AUC and Cmax than did dexibuprofen powder (P < 0.05). In particular, the AUC of solid SEDDS was about twofold higher than that of dexibuprofen powder. Our results suggested that this solid SEDDS could be used as an effective oral solid dosage form to improve the bioavailability of poorly water-soluble drug dexibuprofen.     

渗透泵药物传递系统制备技术研究进展

渗透泵药物传递系统由于能够平稳的释放药物,且释药不易受药物的理化性质、病人生理因素及摄入食物的影响,日益受到药学工作者的关注.目前,已经上市销售的渗透泵片数目对比10年前增长了近1倍.该文简述了渗透泵药物传递系统的结构分类、详细介绍了口服渗透泵制备技术近年来的研究进展.     

基于直肠给药系统的研究和最新进展

口服给药形式简单方便,是常规药物治疗的首选途径,然而对于禁食或其他原因不能口服的药物及服药依从性差的患者,直肠给药是一种安全的替代给药方式.直肠黏膜内血管丰富,给药可发挥局部或全身治疗作用,避免肝脏首过效应,防止胃酸及酶对药物的破坏作用,减少胃的刺激.但由于缺乏经证实的药代动力学研究和对给药器械依赖大,以及给药部位特殊...     

介孔硅材料提高难溶性药物生物利用度的研究进展

介孔二氧化硅作为近年来比较热门的无机介孔载体材料,因其具有孔道排列规整、水热稳定性良好、生物相容性好,可以储存药物并保持药物的无定形态等特点,非常适合装载水难溶性药物。本文通过查阅国内外的相关文献,就难溶性药物口服生物利用度低的原因进行分析,并归纳总结了国内外关于介孔二氧化硅载体提高难溶性药物生物利用度方面的最新研究进展,为设计和制备具有特定结构和性能的介孔二氧化硅载体,提高难溶性药物的生物利用度及其临床应用提供参考。     

Effects of solid carriers on the crystalline properties, dissolution and bioavailability of flurbiprofen in solid self-nanoemulsifying drug delivery system (solid SNEDDS)

In order to investigate the effects of solid carriers on the crystalline properties, dissolution and bioavailability of flurbiprofen in a solid self-nanoemulsifying drug delivery system (solid SNEDDS), different solid SNEDDS formulations were prepared by spray-drying the solutions containing liquid SNEDDS and various carriers. The liquid SNEDDS, composed of Labrafil M 1944 CS/Labrasol/Trasncutol HP (12.5/80/7.5%) with 2% w/v flurbiprofen, gave a z-average diameter of about 100 nm. Silicon dioxide, a hydrophobic solid carrier, produced an excellent conventional solid SNEDDS with a nanoemulsion droplet size of less than 100 nm, similar to the liquid SNEDDS and smaller than the other solid SNEDDS formulations. The drug was in an amorphous state in this solid SNEDDS. Furthermore, it greatly improved the dissolution rate and oral bioavailability of flurbiprofen in rats because it allowed the spontaneous formation of an interface between the oil droplets and the water. Magnesium stearate, a hydrophobic carrier, produced a solid SNEDDS with the largest diameter. However, it greatly enhanced the dissolution rate and oral bioavailability due to the formation of a simple eutectic mixture. The hydrophilic carriers such as polyvinyl alcohol (PVA), sodium carboxymethyl cellulose (Na-CMC) and hydroxypropyl-β-cyclodextrantrin (HP-β-CD) did not form a solid SNEDDS but rather a solid dispersion (or microcapsule). HP-β-CD improved the dissolution rate but did not improve the oral bioavailability as much as the hydrophobic polymers. PVA and Na-CMC hardly improved the dissolution rate but maintained constantly high plasma levels in rats for a long period. Thus, the selection of carrier is an important factor in the development of solid SNEDDS, since the carriers had significant effects on the crystalline properties, dissolution and oral bioavailability of flurbiprofen and on the formation of solid SNEDDS.     

过饱和自微乳释药系统的研究进展

过饱和自微乳是指在原有的自微乳处方中,加入过饱和促进剂而形成的一种释药系统。处于过饱和状态下的微乳,能明显抑制药物的结晶,延长药物的过饱和状态,从而增加药物的溶解度,降低原有自微乳处方中表面活性剂的用量。本文介绍了过饱和自微乳释药系统的处方组成、吸收机制,以及在药物制剂方面的应用。     

基因药物肺部递送系统的研究进展

哮喘、肺气肿、囊性纤维化、肺部病毒感染和肺癌等多种肺部疾病严重影响人类的健康.基因治疗为肺部疾病治疗开辟了一个新的治疗途径.但因裸露的治疗基因易被降解、靶向能力差,因此需要安全有效的传递系统.本文将对基因药物在体内递送至肺部的给药屏障及可行性方法进行讨论.