纳米制剂在透皮药物递送系统中的应用研究进展

透皮药物递送系统作为一种非侵入式给药途径，与传统给药方式相比具有顺应性高、无首过效应等优势。纳米技术的应用使得透皮药物递送系统的药物选择范围进一步扩大，并提高了药物的治疗效果，形成了一种极具价值、令人期待的新型给药方式。目前常用于透皮药物递送系统的纳米制剂包括纳米乳、脂质纳米囊泡、脂质纳米粒、聚合物纳米粒、纳米晶体、溶致液晶纳米粒等。介绍了皮肤屏障和透皮递送的常用促渗方法，综述了各类应用于透皮药物递送系统的纳米制剂及其与物理促渗方法联合应用的研究进展，以期为纳米制剂在透皮递送方面的深入研究提供参考。     

固体脂质纳米粒和纳米结构脂质载体在经皮给药系统中的研究进展

目的介绍固体脂质纳米粒和纳米结构脂质载体在经皮给药系统中的应用与优势,为其开发利用提供参考。方法查阅国内外相关文献共30余篇,从固体脂质纳米粒和纳米结构脂质载体用于经皮给药系统的优势、药物在固体脂质纳米粒和纳米结构脂质载体中的分布形式及固体脂质纳米粒和纳米结构脂质载体在经皮给药领域中的应用等方面进行综述。结果固体脂质纳米粒和纳米结构脂质载体可以增强药物稳定性,能在皮肤表面产生包封效应,增加皮肤水合作用,具有药物靶向性。结论固体脂质纳米粒和纳米结构脂质载体是极有发展前景的新型经皮给药系统。     

多西紫杉醇纳米制剂的研究进展

摘 要多西紫杉醇作为一种高效广谱的抗肿瘤药,临床上用于不同类型实体瘤的治疗,但是水溶性差限制了其制剂的开发。纳米载药系统在提高难溶性药物溶解度、靶向给药、减少药物不良反应等方面极具发展前景。因此,采用纳米载体传递多西紫杉醇的研究受到广泛关注。本文综述了近几年来多西紫杉醇纳米制剂的研究进展,包括脂质体、纳米粒、生物共轭物、聚合物胶束、纳米乳、纳米囊、树枝状聚合物等,以期为新型纳米制剂的开发和应用提供参考。     

环糊精在鼻腔给药系统中的研究进展

近年来,鼻腔给药系统已成为制剂学领域研究的重点之一.环糊精（CD）及其衍生物作为一类安全有效的鼻腔制剂附加剂,能明显的促进药物吸收,增加药物的生物利用度.现就环糊精及其衍生物在鼻腔给药系统中的应用、机理、种属差异和毒性等方面进行了综述.     

壳聚糖微粒及纳米制剂在药剂学中的研究进展

［摘要］查阅国内外相关文献,总结壳聚糖微粒及纳米制剂的主要制备方法及药物的释放方式,阐述壳聚糖微粒纳米制剂在药剂学的主要应用。壳聚糖微粒纳米制剂比表面结构大,生物相容性好,具有优良的药物包埋性能和控制药物释放的能力,是极有发展前景的新型制剂给药系统。     

淋巴靶向给药系统研究与应用

本文对淋巴靶向给药系统的设计机制、给药途径、制剂类型及载体材料、制剂的应用及展望进行了论述。通过制备纳米粒、乳剂、脂质体等新型给药系统可以达到淋巴靶向给药的目的。将药物制成淋巴靶向给药系统是预防、诊断、治疗淋巴癌、淋巴转移癌及其他淋巴疾病的有力工具,具有广阔的研究和应用前景。     

环糊精在药物制剂方面的新应用

环糊精及其衍生物在改善药物理化性质、改进处方、提高药效等方面具有重要价值，尤其在靶向及微粒给药系统等尖端制剂技术方面的应用越来越广泛。对环糊精及其衍生物在速释和缓释制剂、控释给药、定位给药、微粒给药系统、药物微粉化等方面的发展现状进行了综述，以促进国内在这方面的研究。     

纳米给药系统在难溶性药物制剂研究中的应用

近年来,难溶性药物给药系统一直是制剂学研究的重点和难点之一。纳米载体由于其良好的生物相容性及可装载大量难溶性药物等特点而被广泛应用于难溶性药物给药系统的研究,该类载体主要包括纳米粒、脂质体、纳米乳、聚合物胶束、纳米混悬剂等。本文结合近几年国内外文献报道,对纳米给药系统在难溶性药物制剂研究中的最新进展进行概述。     

泊洛沙姆为载体的疏水性药物新剂型研究进展

目的综述高分子聚合物辅料泊洛沙姆近年来在提高疏水性药物溶解吸收和生物利用度方面的最新应用进展。方法查阅近2～3年来国内外研究文献,总结以泊洛沙姆407及泊洛沙姆188为载体的的各种疏水性药物给药新剂型及其载药特性和优点。结果以两类泊洛沙姆制备的给药新剂型主要有原位凝胶、固体分散体、纳米乳、纳米粒和复合制剂等,具有给药方便、增加药物溶解吸收、提高药物生物利用度及缓释效果显著等优点。结论两类泊洛沙姆是疏水药物新剂型研究的理想载体之一,尤其在中药难溶性有效成分给药系统研究中应用前景广阔。     

改善中药挥发油稳定性的制剂学研究进展

查阅近年来中药挥发油稳定性研究的相关文献，综述改善挥发油稳定性的制剂学进展。中药挥发油药理作用明确，主要采用包合物及微载体技术改善其稳定性，研究手段基于环糊精包合物、微囊、徽乳、脂质体及纳米粒等给药系统。挥发油经微载体包封后，稳定性明显提高，有利于进一步的制剂研制和药效发挥。     

从纳米给药系统角度探讨阿尔茨海默病的治疗策略

阿尔茨海默病严重威胁人类健康,主要是血脑屏障限制了药物到达作用靶点,影响阿尔茨海默病的治疗.而纳米给药系统为药物的脑靶向递送提供了可能,对阿尔茨海默病的治疗有改善作用,本文从阿尔茨海默病的发病机制和常规治疗药物展开,重点从纳米给药系统角度进行介绍阿尔茨海默病的治疗策略,概述几种典型的治疗阿尔茨海默病的纳米给药系统,即脂质体、聚合物胶束、固体脂质纳米粒和聚合物纳米粒等.     

纳米药物载体在经皮给药系统中应用的研究进展

目的介绍纳米药物载体在经皮给药系统中的应用。方法查阅国内外文献共31篇,从纳米药物载体在经皮给药系统中的应用及各自的优势和不足等方面进行综述。结果纳米药物载体具有提高药物的化学稳定性、促进药物经皮吸收、控制药物释放以及定位给药等优点,在药物的经皮吸收方面具有广阔应用前景。结论纳米药物载体为药物的经皮通透提供了新的途径和方法,但是其安全性和有效性仍需进一步研究。     

Recent advances in brain tumor-targeted nano-drug delivery systems

INTRODUCTION: Brain tumors represent one of the most challenging and difficult areas in unmet medical needs. Fortunately, the past decade has seen momentous developments in brain tumor research in terms of brain tumor-targeted novel nano-drug delivery systems with significant important superiority over conventional formulations with respect to decreased toxicity and improved pharmacokinetics/pharmacodynamics. AREA COVERED: This review first introduces the characteristics of the two major obstacles in brain-tumor targeted delivery, blood-brain barrier (BBB) and blood-brain tumor barrier (BBTB), and then reviews recent advances in brain tumor-targeted novel nano-drug delivery systems according to their targeting strategies aimed at different stages of brain tumor development and growth. EXPERT OPINION: Based on continuously changing vascular characteristics of brain tumors at different development and growth stages, we propose the concept of 'whole-process targeting' for brain tumor for nano-drug delivery systems, referring to a series of overall targeted drug delivery strategies aimed at key points during the whole development of brain tumors.     

Recent advances in brain tumor-targeted nano-drug delivery systems

Introduction: Brain tumors represent one of the most challenging and difficult areas in unmet medical needs. Fortunately, the past decade has seen momentous developments in brain tumor research in terms of brain tumor-targeted novel nano-drug delivery systems with significant important superiority over conventional formulations with respect to decreased toxicity and improved pharmacokinetics/pharmacodynamics.

Area covered: This review first introduces the characteristics of the two major obstacles in brain-tumor targeted delivery, blood–brain barrier (BBB) and blood–brain tumor barrier (BBTB), and then reviews recent advances in brain tumor-targeted novel nano-drug delivery systems according to their targeting strategies aimed at different stages of brain tumor development and growth.

Expert opinion: Based on continuously changing vascular characteristics of brain tumors at different development and growth stages, we propose the concept of ‘whole-process targeting’ for brain tumor for nano-drug delivery systems, referring to a series of overall targeted drug delivery strategies aimed at key points during the whole development of brain tumors.     

氧化还原敏感型靶向纳米给药系统的研究进展

理想的肿瘤靶向给药系统应在肿瘤部位高度累积且快速释放药物,而在血液循环中无泄漏,利用肿瘤环境改变的氧化还原状态及细胞内外的谷胱甘肽差异,结合纳米给药系统,可实现精准肿瘤靶向.本文对氧化还原敏感型靶向纳米给药系统的原理、氧化还原敏感键及其构建方法进行了介绍,并对基于脂质体、纳米粒、纳米胶束、纳米凝胶4种载体的不同氧化还原...     

Smart drug delivery systems for precise cancer therapy

Nano-drug delivery strategies have been highlighted in cancer treatment, and much effort has been made in the optimization of bioavailability, biocompatibility, pharmacokinetics profiles, and in vivo distributions of anticancer nano-drug delivery systems. However, problems still exist in the delicate balance between improved anticancer efficacy and reduced toxicity to normal tissues, and opportunities arise along with the development of smart stimuli-responsive delivery strategies. By on-demand responsiveness towards exogenous or endogenous stimulus, these smart delivery systems hold promise for advanced tumor-specificity as well as controllable release behavior in a spatial-temporal manner. Meanwhile, the blossom of nanotechnology, material sciences, and biomedical sciences has shed light on the diverse modern drug delivery systems with smart characteristics, versatile functions, and modification possibilities. This review summarizes the current progress in various strategies for smart drug delivery systems against malignancies and introduces the representative endogenous and exogenous stimuli-responsive smart delivery systems. It may provide references for researchers in the fields of drug delivery, biomaterials, and nanotechnology.     

Cyclodextrin-based supramolecular systems for drug delivery: Recent progress and future perspective

The excellent biocompatibility and unique inclusion capability as well as powerful functionalization capacity of cyclodextrins and their derivatives make them especially attractive for engineering novel functional materials for biomedical applications. There has been increasing interest recently to fabricate supramolecular systems for drug and gene delivery based on cyclodextrin materials. This review focuses on state of the art and recent advances in the construction of cyclodextrin-based assemblies and their applications for controlled drug delivery. First, we introduce cyclodextrin materials utilized for self-assembly. The fabrication technologies of supramolecular systems including nanoplatforms and hydrogels as well as their applications in nanomedicine and pharmaceutical sciences are then highlighted. At the end, the future directions of this field are discussed.     

The role of caveolin-1 in the biofate and efficacy of anti-tumor drugs and their nano-drug delivery systems

As one of the most important components of caveolae, caveolin-1 is involved in caveolae-mediated endocytosis and transcytosis pathways, and also plays a role in regulating the cell membrane cholesterol homeostasis and mediating signal transduction. In recent years, the relationship between the expression level of caveolin-1 in the tumor microenvironment and the prognostic effect of tumor treatment and drug treatment resistance has also been widely explored. In addition, the interplay between caveolin-1 and nano-drugs is bidirectional. Caveolin-1 could determine the intracellular biofate of specific nano-drugs, preventing from lysosomal degradation, and facilitate them penetrate into deeper site of tumors by transcytosis; while some nanocarriers could also affect caveolin-1 levels in tumor cells, thereby changing certain biophysical function of cells. This article reviews the role of caveolin-1 in tumor prognosis, chemotherapeutic drug resistance, antibody drug sensitivity, and nano-drug delivery, providing a reference for the further application of caveolin-1 in nano-drug delivery systems.KEY WORDS: Caveolin-1, Cancer, Drug resistance, Transcytosis, Nano-drug delivery systems, Biofate     

The impact of Rho GTPases on the cell uptake of single-walled carbon nanohorns

Rho GTPases play an important role on the regulation of cytoskeleton, which can affect the cell morphogenesis, cell migration, endocytosis and vesicle transport by controlling the growth and maintenance of microfilaments and microtubules. It has been known that regulation of cell cytoskeleton is inseparable from the cell uptake of nano-medicine or nano-drug delivery systems. However, only few studies have focused on the impacts of Rho GTPases on cell uptake of nano-medicine or nano-drug delivery systems. This study selected single-walled carbon nanohorns (SWCNHs), which have emerged as promising drug delivery systems, to explore the impacts of Rho GTPases on cell uptake of nano-drug delivery systems. SWCNHs were oxidized with concentrated nitric acid and prepared into nano dispersion by ultrasonic dispersion. Confocal laser scanning microscope (CLSM) and transmission electron microscopy (TEM) were used to observe the cell uptake and intracellular distribution of nanoparticles after incubated A549 cells with the dispersion mentioned above. Mechanism of cell uptake was assessed using various inhibitors. The results showed that the cell uptake of oxSWCNHs was significantly reduced when RhoA was inhibited. The oxSWCNHs were internalized through clathrin-mediated endocytosis and mainly positioned in lysosomes of A549 cells.     

Protease-triggered bioresponsive drug delivery for the targeted theranostics of malignancy

Proteases have a fundamental role in maintaining physiological homeostasis, but their dysregulation results in severe activity imbalance and pathological conditions, including cancer onset, progression, invasion, and metastasis. This striking importance plus superior biological recognition and catalytic performance of proteases, combining with the excellent physicochemical characteristics of nanomaterials, results in enzyme-activated nano-drug delivery systems (nanoDDS) that perform theranostic functions in highly specific response to the tumor phenotype stimulus. In the tutorial review, the key advances of protease-responsive nanoDDS in the specific diagnosis and targeted treatment for malignancies are emphatically classified according to the effector biomolecule types, on the premise of summarizing the structure and function of each protease. Subsequently, the incomplete matching and recognition between enzyme and substrate, structural design complexity, volume production, and toxicological issues related to the nanocomposites are highlighted to clarify the direction of efforts in nanotheranostics. This will facilitate the promotion of nanotechnology in the management of malignant tumors.